From lve1@inel.gov Wed Sep 18 16:17:34 1996 Received: from eloi.inel.gov (eloi.INEL.GOV [134.20.173.29]) by oucsace.cs.ohiou.edu (8.7.1/8.7.1) with ESMTP id QAA09900 for ; Wed, 18 Sep 1996 16:17:01 -0400 (EDT) X-Received-x: from eloi.inel.gov (eloi.INEL.GOV [134.20.173.29]) by oucsace.cs.ohiou.edu (8.7.1/8.7.1) with ESMTP id QAA09900 for ; Wed, 18 Sep 1996 16:17:01 -0400 (EDT) Received: from pc-lve.inel.gov ([134.20.14.12]) by eloi.inel.gov (post.office MTA v2.0 0813 ID# 0-12374) with SMTP id AAA23715; Wed, 18 Sep 1996 14:17:05 -0600 Message-Id: <2.2.16.19960918201800.27c7b378@134.20.173.29> X-Sender: lve1@134.20.173.29 X-Mailer: Windows Eudora Pro Version 2.2 (16) Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Date: Wed, 18 Sep 1996 14:18:00 -0600 To: Anders Wandahl , William McFadden , "Taylor Greg" , , cookes@pop.jaring.my (Siong Teck Cheun @ Joseph), BERGESON@PPCC.CCCOES.EDU From: lve1@inel.gov (Larry V East) Subject: QRP+ V4C EPROM Status: RO 16 September 1996 I finally got around to installing the "Rev 4C" EPROM from Index in my QRP-PLUS. This is a "supplied upon request" $6 upgrade for the original QRP+ (not the new improved version) that is intended to cure a couple of keying problems. In particular, it eliminates the "forced spacing" of the internal keyer that so many folks objected to and it allows an external keyer to be used up to at least 40 wpm. Turns out that characteristics of the SCAF (switched capacitance audio filter) are also changed by this upgrade. The EPROM that I replaced was "Rev 03"; that's the one that changes the internal keyer to provide 1 wpm rather than 5 wpm speed increments and "remembers" the last operating mode (CW or SSB). The Rev 03 new features are still present in the Rev 4C code. I decided to keep the Rev 03 EPROM (I sent Index $10 rather than $6 and the old chip) for a "backup" and so that I could make some direct comparisons with the Rev 4C code. I present the results of my comparisons here for your information and edification. Keying Characteristics ---------------------- The Rev 4C code changes did indeed eliminate the "forced spacing" characteristic of the internal keyer. The "feel" of the internal keyer is now the same (or very close to) "Curtis B mode" keyers and is much easier (for me) to use. The rig will now follow an external keyer up to at least 44 wpm (that's as fast as my keyer will run), whereas the Rev 03 and earlier EPROMs would not allow external keying above 27 wpm or so. However, keying becomes erratic above 42 wpm when in RIT or SPLIT mode with either the internal keyer or external keying, so for all practical purposes the keying speed is limited to about 40 wpm. A disappointing side-effect of the Rev 4C code is that keying is very mushy when in normal XCEVE mode -- the rise time of the transmitter output envelope is almost 10ms! When the front panel mode switch is in the RIT or SPLIT position, the keyed output risetime is about 2ms -- the same as with the Rev 03 code -- resulting in much better sounding keying. "What's going on here," you may well ask (as did I). To answer that requires a little explanation of the keying sequence in the rig. When a key closure occurs, +12V is immediately applied to the transmitter driver stages and the antenna is switched from the receive to the transmit RF chain. However, the actual keying signal (a voltage applied to the balanced modulator to unbalance it and let RF pass) is delayed slightly -- about 5ms in XCEVE and about 25 ms if RIT or SPLIT is turned on. (This delay was much longer with previous firmware versions which resulted in the limited external keying speed.) The short delay when in XCEVE does not allow the bias on the first driver transistor to reach its final operating point before RF is applied resulting in the slow rise of the output RF envelope. So -- does that mean that one must leave the mode switch in RIT or SPLIT to get decent keying? Well, not if you are willing to make a simple modification to the RF board: decrease the size of C54 by a factor of 10 from 4.7uF to 0.47uF. That simple change will result in a 2ms risetime when in XCEVE as well as RIT and SPLIT modes. The RF board is the top one in the stack, and C54 is located in the upper left-hand quadrant (when viewed from the front of the rig). Another problem noted with the Rev 4C EPROM: an RIT or SPLIT receive/transmit offset of more than 3 to 5 kHz (depending on the band) resulted in noticeable "chirp" on the keyed signal monitored on another receiver. The chirp became very pronounced at offsets of 10kHz or more. With the Rev 03 EPROM installed, I could not detect any noticeable chip below a receive/transmit offset of 15 to 20 kHz (depending on band). The Rev 4C EPROM provides less delay between key-down and transmitter output in order to accommodate faster external keying (see above), but this reduced delay does not give the PLL sufficient time to stabilize the VCO frequency. I have seen complaints from others about chirp with this EPROM even with no RIT offset, so the PLL settling time may vary somewhat from rig to rig. The good news is that the chirp CAN be cured -- at least for receive/transmit offsets that are not too great -- by replacing a couple of caps on the LO board. The bad news is that the LO board is the third one down in the stack. I changed C43 and C44 from 4.7uF (original values) to 2.2 uF, and now I don't notice any keying chirp for receive/transmit offsets of at least 20 kHz. This is good enough for "DX split" operation, which is typically no more than 10 kHz on CW. Some care is in order when mucking about with these cap values; reducing the values too much can result in the PLL becoming unstable. I did not try to determine how much lower than 2.2uF can be safely used since that value seems to do the trick. C43 and C44 are located near the LO board's right-hand rear edge (when viewed from the front of the rig). I have seen reports that the Rev 4C EPROM produces more pronounced key- clicks in the side tone. I have installed mods in my rig that greatly reduce keying clicks and thumps in the audio output, and I did not notice any change in the sidetone after installing the new EPROM. However, the reduced keying delay (with the new EPROM) could well result in a noticeable increase in the key-down click in unmodified rigs. (The descriptions of these modes were included in my posting for reducing AGC thump some time ago and are available on request.) SCAF Response Changes --------------------- Replacing the Rev 03 EPROM with Rev 4C chip resulted in different SCAF bandpass characteristics for filter width settings of 1.0 and below. The approximate 6 dB bandpass edges and center frequencies for a few filter settings are compared in the table below (frequencies are in Hertz). Width | Rev 03 | Rev 4C Setting | low center high | low center high -----------|----------------------------|---------------------------- 0.8 | 410 905 1400 | 600 1095 1590 0.4 | 410 705 1000 | 600 895 1190 0.2 | 410 600 790 | 600 795 990 My filter width measurements weren't the most precise, but they WERE performed with the AGC disabled (just in case anyone asks...). The new filter characteristics are more consistent with the receive/transmit offset of about 700 Hz (I measured 720 Hz on my rig). Using the narrowest filter settings (0.3 and below) with the older EPROMs can result in inadvertently listening about 100 Hz (or more) below the transmit frequency if the received signal is centered in the filter passband. - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Copyright (c) 1996 by Larry East, W1HUE May be reproduced if proper credit is given and not quoted out of context. From lve1@inel.gov Thu Sep 19 12:28:52 1996 Received: from eloi.inel.gov (eloi.INEL.GOV [134.20.173.29]) by oucsace.cs.ohiou.edu (8.7.1/8.7.1) with ESMTP id MAA12827 for ; Thu, 19 Sep 1996 12:28:49 -0400 (EDT) X-Received-x: from eloi.inel.gov (eloi.INEL.GOV [134.20.173.29]) by oucsace.cs.ohiou.edu (8.7.1/8.7.1) with ESMTP id MAA12827 for ; Thu, 19 Sep 1996 12:28:49 -0400 (EDT) Received: from pc-lve1 ([134.20.194.51]) by eloi.inel.gov (post.office MTA v2.0 0813 ID# 0-12374) with SMTP id AAA15273; Thu, 19 Sep 1996 10:27:55 -0600 Message-Id: <2.2.16.19960919162726.14573c0a@eloi> X-Sender: lve1@eloi X-Mailer: Windows Eudora Pro Version 2.2 (16) Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Date: Thu, 19 Sep 1996 10:27:26 -0600 To: pepperb@gov.on.ca, Charlie Lofgren , bkassel@enet.net (Brian Kassel), Paul Erickson , Mike Rioux , John Dundas , af852@rgfn.epcc.Edu (William R Colbert), Bob_Tellefsen-CNSE97@email.mot.com, Christoph Zehntner , GREGOIRE@ENDOR.COM (ERNEST GREGOIRE), jdorson@bbs.mpcs.com (John Dorson), "GaryNye" , Bill Acito , "Mark B. Peterson" <70233.1106@CompuServe.COM>, bfollett@ditell.com, bcutter@teal.csn.net (Bob Cutter), john@antenna.demon.co.uk, "Francis A. McCrackin" , "Richard Hieber" , "JOHN F. McCLUN" , MCDANIELD@ouvaxa.cats.ohiou.edu, Norbert.Heyder@erno.de, N5EM@aol.com, larsennc@alaska.net (Nancy-KL7NY/Jim-AL7FS/Juliann-WL7MP), "Jerry L. Bartachek" , "Alvin G. Gann" , Peter Zenker <100743.3320@CompuServe.COM>, Wolfgang Schwarz <101511.61@CompuServe.COM>, Jerry KD0CA , jim_kc1fb@usa.pipeline.com (Jim Francoeur KC1FB), DYARNES@aol.com, tavan@tibco.com, "Bob Barry" , dgf@netcom.com (David Feldman), john andrews , Joel Malman , Dean Marzocca , rwright@soml.com (Robert Wright), Anders Wandahl , , rcmcc@cc.bellcore.com (ronald c mcconnell), , Scott Cranston , William McFadden , "Taylor Greg" , Art Winterbauer , , cookes@pop.jaring.my (Siong Teck Cheun @ Joseph), BERGESON@PPCC.CCCOES.EDU, George Gingell , "Doyle, Ron" From: lve1@inel.gov (Larry V East) Subject: General Information Status: RO Good morning/afternoon/evening (depending on your time zone...)! You are receiving this message because your email address is present in my "QRP-PLUS Mods and Information" address list. If you are no longer interested in receiving information on QRP-PLUS mods, measurements, etc. please let me know and I will remove you from the list. This is NOT an email reflector, but simply a private list of people who have expressed interest in receiving QRP-PLUS info. I created this list primarily to eliminate posting information on QRP-L that is of little or no interest to the majority of its subscribers. If you would like to send information on mods or measurements you have made to members of this list, you can send it to me and I will forward it. HOWEVER... if I get more than a few requests per week, I may well withdraw the offer! :-) Don't expect instant response as I am often busy or out of town for a few days. I have made several general postings to the list; if you have been recently added, you probably missed some of them. You can request copies by sending email to me with the following in the body of the message: SEND FILE where is one of the following: THUMP -- describes a simple audio limiter to reduce the effect of "AGC thump". A couple of other mods to eliminate clicks and thumps in the sidetone monitor are also described. COMPARE -- some comparisons that I made between my modified QRP+ and a relatively new QRP++. This information also appeared in the July 1996 issue of the ARCI QRP Quarterly. FILTER -- describes new transmit output filters that I installed in my rig. EPROM -- contains some comparisons between the Rev 03 and Rev 4C EPROMs. The same message can contain multiple requests -- just put them at the beginning of the message so that I don't miss them. UPPER or lower case is OK. NOTE: If you wish to further distribute any information received via this mailing list, please give proper credit and do not quote out of context! If you wish to publish any of the information in any form (newsletter, etc.), please be kind enough to ask the author(s) for permission. _________________________________________________________ "Any opinions expressed herein are my own and probably do not agree with those of my employer, the U.S. Government or my spouse" --... ...-- Larry V. East (W1HUE) Idaho Falls, ID e-mail: LVE1@inel.gov work: (208) 526-0081 home: (208) 529-2162 From owner-qrp-l@Lehigh.EDU Sun Sep 8 13:07:29 1996 Received: from fidoii.CC.Lehigh.EDU (fidoii.CC.Lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.7.1/8.7.1) with ESMTP id NAA04033 for ; Sun, 8 Sep 1996 13:07:27 -0400 (EDT) X-Received-x: from fidoii.CC.Lehigh.EDU (fidoii.CC.Lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.7.1/8.7.1) with ESMTP id NAA04033 for ; Sun, 8 Sep 1996 13:07:27 -0400 (EDT) Received: from Lehigh.EDU ([127.0.0.1]) by fidoii.cc.lehigh.edu with SMTP id <175808-29099>; Sun, 8 Sep 1996 13:01:04 -0400 Received: from nss2.CC.Lehigh.EDU ([128.180.1.26]) by fidoii.cc.lehigh.edu with ESMTP id <175732-41390>; Sun, 8 Sep 1996 13:00:15 -0400 Received: from omail.eee.org (omail.eee.org [163.150.1.3]) by nss2.CC.Lehigh.EDU (8.7.5/8.7.3) with ESMTP id MAA57910 for ; Sun, 8 Sep 1996 12:59:59 -0400 Received: from mickey.sbcss.k12.ca.us (mcinet.sbcss.k12.ca.us) by omail.eee.org with SMTP (1.39.111.2/16.2) id AA287821871; Sun, 8 Sep 1996 09:57:52 -0700 Message-Id: <3232FA6A.3B6E@eee.org> Date: Sun, 08 Sep 1996 09:55:06 -0700 Reply-To: jm165723@eee.org Sender: owner-qrp-l@Lehigh.EDU Precedence: bulk From: john andrews To: "Low Power Amateur Radio Discussion" Subject: Re: Berlin Files on Index Labs QRP+/QRP++ References: <960908121116_518247878@emout08.mail.aol.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-To: NoesisDG@aol.com X-Cc: qrp-l@Lehigh.EDU X-Mailer: Mozilla 2.01KIT (Win95; U) X-Listprocessor-Version: 8.0 -- ListProcessor(tm) by CREN Status: RO NoesisDG@aol.com wrote: > > Can anyone help me with a URL (preferably to an English language web page) > for a Berlin QRP club that carries mods and firmware changes for the Index > Labs QRP++/QRP++? > > When I spoke to Bruce Franklin at Index Labs some time ago he mentioned that > there was a group of enthusiasts in Germany who had disassembled and > commented at least part of the firmware coding for the QRP+ (it tickled him > that someone was taking the time to do that). He's not on the Internet so > couldn't provide any URLs. > > I have a couple of firmware mods (one to change the fast tuning rate for the > frequency dial) that I worked out with Bruce but would like to see more. > > Thanks guys! > > David Gwillim KB2TQX/QRP QRP-L #679 Sorry, David, feeling a little silly right now. The mods for the QRP+ are right under my nose. Try the QRP-L ftp site under /mods/ I think the Larry East mods are there as well. 72, John- N5INZ/6 From owner-qrp-l@Lehigh.EDU Mon Sep 9 17:30:24 1996 Received: from fidoii.CC.Lehigh.EDU (fidoii.CC.Lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.7.1/8.7.1) with ESMTP id RAA18578 for ; Mon, 9 Sep 1996 17:30:23 -0400 (EDT) X-Received-x: from fidoii.CC.Lehigh.EDU (fidoii.CC.Lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.7.1/8.7.1) with ESMTP id RAA18578 for ; Mon, 9 Sep 1996 17:30:23 -0400 (EDT) Received: from Lehigh.EDU ([127.0.0.1]) by fidoii.cc.lehigh.edu with SMTP id <174774-41306>; Mon, 9 Sep 1996 17:23:18 -0400 Received: from nss2.CC.Lehigh.EDU ([128.180.1.26]) by fidoii.cc.lehigh.edu with ESMTP id <174489-57687>; Mon, 9 Sep 1996 17:18:49 -0400 Received: from eloi.inel.gov (eloi.INEL.GOV [134.20.173.29]) by nss2.CC.Lehigh.EDU (8.7.5/8.7.3) with ESMTP id RAA106682 for ; Mon, 9 Sep 1996 17:18:39 -0400 Received: from pc-lve1 ([134.20.194.51]) by eloi.inel.gov (post.office MTA v1.9.3 ID# 0-12374) with SMTP id AAA1391 for ; Mon, 9 Sep 1996 15:19:06 -0600 Message-Id: <2.2.16.19960909211820.18ef3a32@eloi> Date: Mon, 09 Sep 1996 15:18:20 -0600 Reply-To: lve1@inel.gov Sender: owner-qrp-l@Lehigh.EDU Precedence: bulk From: lve1@inel.gov (Larry V East) To: "Low Power Amateur Radio Discussion" Subject: QRP+/QRP++ Output Filters - Clarification Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" X-Sender: lve1@eloi X-Mailer: Windows Eudora Pro Version 2.2 (16) X-Listprocessor-Version: 8.0 -- ListProcessor(tm) by CREN Status: RO A point of clarification -- unless the recent review in QST prompted Index to make a change, the transmitter output filters in the "New Improved QRP++" are the same as the ones in the "Old QRP+". The filters for 160M thru 40M are "elliptic" design and provide at least 40dB of harmonic attenuation. The filters for bands above 40M are shared between two bands -- one filter for 30M and 20M, one for 17M and 15M and one for 12M and 10M. These filters are NOT elliptic (for some strange reason) and in some cases the harmonic attenuation is less than 40dB but (usually) greater than 30dB. The US FCC requires spurious radiations to be at least 30dB below the carrier for amateur HF transmitters running 5W or less, and at least 40dB below the carrier above 5W. A QRP+/QRP++ will (usually) meet this requirement if output power is limited to 5W, but not on some of the higher bands at >5W output. Some countries require harmonic emissions to be >40dB below the carrier at any output power level. My previous post stated that I have new output filter designs that will provide >45dB harmonic attenuation for the bands above 40M. (Send me email if you want the design info.) There is another problem regarding 12M spurs that CANNOT be eliminated by the output filter as they are very close to the carrier frequency. These spurs are (just barely) >30dB below the carrier in the QRP++, but NOT the QRP+ (at least not mine). I have an idea for fixing the 12M spur problem, but I haven't had tome to try it. Hopefully I'll have it done before the sun spots return. :-) I hope that everything is all perfectly clear now... :-) :-) 72, Larry W1HUE/7 From lve1@inel.gov Mon Sep 23 11:25:24 1996 Received: from eloi.inel.gov (eloi.INEL.GOV [134.20.173.29]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id LAA25303 for ; Mon, 23 Sep 1996 11:25:20 -0400 (EDT) X-Received-x: from eloi.inel.gov (eloi.INEL.GOV [134.20.173.29]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id LAA25303 for ; Mon, 23 Sep 1996 11:25:20 -0400 (EDT) Received: from pc-lve1 ([134.20.194.51]) by eloi.inel.gov (post.office MTA v2.0 0813 ID# 0-12374) with SMTP id AAF2876; Mon, 23 Sep 1996 09:24:45 -0600 Message-Id: <2.2.16.19960923152329.1c6f9594@eloi> X-Sender: lve1@eloi X-Mailer: Windows Eudora Pro Version 2.2 (16) Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Date: Mon, 23 Sep 1996 09:23:29 -0600 To: pepperb@gov.on.ca, Charlie Lofgren , bkassel@enet.net (Brian Kassel), Paul Erickson , Mike Rioux , John Dundas , af852@rgfn.epcc.Edu (William R Colbert), Bob_Tellefsen-CNSE97@email.mot.com, Christoph Zehntner , GREGOIRE@ENDOR.COM (ERNEST GREGOIRE), jdorson@bbs.mpcs.com (John Dorson), "GaryNye" , Bill Acito , "Mark B. Peterson" <70233.1106@CompuServe.COM>, bfollett@ditell.com, bcutter@teal.csn.net (Bob Cutter), john@antenna.demon.co.uk, "Francis A. McCrackin" , "Richard Hieber" , "JOHN F. McCLUN" , MCDANIELD@ouvaxa.cats.ohiou.edu, Norbert.Heyder@erno.de, N5EM@aol.com, larsennc@alaska.net (Nancy-KL7NY/Jim-AL7FS/Juliann-WL7MP), "Jerry L. Bartachek" , "Alvin G. Gann" , Peter Zenker <100743.3320@CompuServe.COM>, Wolfgang Schwarz <101511.61@CompuServe.COM>, Jerry KD0CA , jim_kc1fb@usa.pipeline.com (Jim Francoeur KC1FB), DYARNES@aol.com, tavan@tibco.com, "Bob Barry" , dgf@netcom.com (David Feldman), john andrews , Joel Malman , Dean Marzocca , rwright@soml.com (Robert Wright), Anders Wandahl , , rcmcc@cc.bellcore.com (ronald c mcconnell), , Scott Cranston , William McFadden , "Taylor Greg" , Art Winterbauer , , cookes@pop.jaring.my (Siong Teck Cheun @ Joseph), BERGESON@PPCC.CCCOES.EDU, George Gingell , "Doyle, Ron" , "Gert, SM5LWC" From: lve1@inel.gov (Larry V East) Subject: QRP+ Memory Channels Status: RO George asked me to forward the following to the QRP+ Mail List: >Return-Path: >Date: Thu, 19 Sep 1996 16:16:09 -0400 (EDT) >From: George Gingell >To: Larry East >Subject: QRP+ Memory Channels > >Larry, >I realise that this is probably old hat to you, but I thought I would >pass it along for anyone who might be interested. When I got my rig >back from Index Labs recently. It had blown the Final Mysteriously. >I think it was related to the loose foot on the bottom of the rig. It >has a ground lug under the same screw inside. It worked perfectly on >Field Day in the Car. I went to use it in the house for the weekly QRP >Net on Saturday morning the following week, I t came on briefly then >Started blowing fuses. Lesson learned, Check the screws for tightness >before fireing it up after a field trip. :^) (Or risk letting the smoke >out!) Back to the contribution. This is a list of the Factory Default >Frequencies and my new list of preferred settings. I was thinking of >sending out an inquiry to other QRP+ owners for a copy of their >personal preferred frequency list. My thought was that we might discover >where the real QRP Hot Spots were located? So, for what it is worth, here >it goes. >---------------------QRP + Settings of QRP+ # 0306 ----------------------- >Chuck, 3 A.M.- September 7, 1996 > > >Here a few additional comments. Not sure what happens if I exceed five lines :-) > > >COM> I hope I finish this in time, I have put in at least four hours overtime >COM> on this and I am supposed to be on vacation :-). >COM> How about a survey on What are your favorite Frequencies? >COM> Not just the "Standard QRP Frequencies," But where do you hang out ? >COM> How about A TMPS Report on what Freq you worked each State? >COM> Now that would be useful. >COM> I thought of this while trying to reprogram my QRP Plus Memory channels. >COM> I would especially like to see a list of QRP Plus Memory Channel Lists. >COM> I hope I finish this in time, I have put in at least four hours overtime >COM> on this and I am supposed to be on vacation :-). >COM> How about a survey on What are your favorite Frequencies? >COM> Not just the "Standard QRP Frequencies," But where do you hang out ? >COM> How about A TMPS Report on what Freq you worked each State? >COM> Now that would be useful. >COM> I thought of this while trying to reprogram my QRP Plus Memory channels. >COM> I would especially like to see a list of QRP Plus Memory Channel Lists. >COM> Since I didn't do TMPS, I can't give you a list of frequencies used. >COM> I think it might be interesting to see which are the HOT spots, and it >COM> might be useful to list the Beacons, Broadcast, Commercial and any other >COM> points of interest on the band for the benefit of those New Kids on the >COM> block. >COM> I will include my QRP PLUS Memory Channel Program List for a start. >COM> I think it will help define where the real aqction can be found. > >QRP DX TU (C) 1986, G. Danny Gingell, K3TKS@abs.net >Maryland Milliwatt Club QRP Reference Library, (301)572-6789 > > INDEX LABS QRP PLUS - K3TKS - Serial # 0306 Memory Storage Assignments >--------------------------------------------------------------------------- >Memory Channel # Frequency Assigned Factory Default Settings > CW Mode SSB Mode >--------------------------------------------------------------------------- >CH # 01 1.810.0 Mhz 1.819.6 Mhz 1.820.3 Mhz. >CH # 02 3.535.0 Mhz 1.949.6 Mhz 1.950.3 Mhz. >CH # 03 3.560.0 Mhz 3.559.6 Mhz 3.560.3 Mhz. >CH # 04 3.710.0 Mhz 3.989.6 Mhz 3.990.3 Mhz. >CH # 05 3.855.0 Mhz 7.039.6 Mhz 7.040.3 Mhz. >CH # 06 7.030.0 Mhz 7.139.6 Mhz 7.140.3 Mhz. >CH # 07 7.040.0 Mhz 10.116.3 Mhz 10.115.6 Mhz. >CH # 08 7.110.0 Mhz 10.123.3 Mhz 10.122.6 Mhz. >CH # 09 7.285.0 Mhz 14.060.3 Mhz 14.059.6 Mhz. >CH # 10 10.106.0 Mhz 14.250.3 Mhz 14.249.6 Mhz. >CH # 11 10.120.0 Mhz 18.070.3 Mhz 18.069.6 Mhz. >CH # 12 14.060.0 Mhz 18.120.3 Mhz 18.119.6 Mhz. >CH # 13 14.285.0 Mhz 21.060.3 Mhz 21.059.6 Mhz. >CH # 14 18.070.0 Mhz 21.400.3 Mhz 21.399.6 Mhz. >CH # 15 21.060.0 Mhz 24.900.3 Mhz 24.899.6 Mhz. >CH # 16 21.285.0 Mhz 24.920.3 Mhz 24.919.6 Mhz. >CH # 17 24.900.0 Mhz 28.060.3 Mhz 28.059.6 Mhz. >CH # 18 28.060.0 Mhz 28.350.3 Mhz 28.349.6 Mhz. >CH # 19 28.332.0 Mhz 30.053.3 Mhz 30.052.6 Mhz. >CH # 20 30.000.0 Mhz 30.053.3 Mhz 30.052.6 Mhz. > >Note: default Moode comes up in SSB Mode on Memory Channel # 05 = 7.040.3 Mhz. >Channels 19 & 20 are exactly alike. Making it appear that there are only 19 >memory channels. > >QRP DX TU (C) 1986 G.Danny Gingell, K3TKS@.abs.net >Maryland Milliwatt Club QRP Reference Library, (301)572-6789 > > > From lve1@inel.gov Wed Sep 25 11:10:54 1996 Received: from eloi.inel.gov (eloi.INEL.GOV [134.20.173.29]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id LAA05801 for ; Wed, 25 Sep 1996 11:10:53 -0400 (EDT) X-Received-x: from eloi.inel.gov (eloi.INEL.GOV [134.20.173.29]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id LAA05801 for ; Wed, 25 Sep 1996 11:10:53 -0400 (EDT) Received: from pc-lve1 ([134.20.194.51]) by eloi.inel.gov (post.office MTA v2.0 0813 ID# 0-12374) with SMTP id AAA9782; Wed, 25 Sep 1996 09:10:33 -0600 Message-Id: <2.2.16.19960925150902.1877abfa@eloi> X-Sender: lve1@eloi X-Mailer: Windows Eudora Pro Version 2.2 (16) Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Date: Wed, 25 Sep 1996 09:09:02 -0600 To: pepperb@gov.on.ca, Charlie Lofgren , bkassel@enet.net (Brian Kassel), Paul Erickson , Mike Rioux , John Dundas , af852@rgfn.epcc.Edu (William R Colbert), Bob_Tellefsen-CNSE97@email.mot.com, Christoph Zehntner , GREGOIRE@ENDOR.COM (ERNEST GREGOIRE), jdorson@bbs.mpcs.com (John Dorson), "GaryNye" , Bill Acito , "Mark B. Peterson" <70233.1106@CompuServe.COM>, bfollett@ditell.com, bcutter@teal.csn.net (Bob Cutter), john@antenna.demon.co.uk, "Francis A. McCrackin" , "Richard Hieber" , "JOHN F. McCLUN" , MCDANIELD@ouvaxa.cats.ohiou.edu, Norbert.Heyder@erno.de, N5EM@aol.com, larsennc@alaska.net (Nancy-KL7NY/Jim-AL7FS/Juliann-WL7MP), "Jerry L. Bartachek" , "Alvin G. Gann" , Peter Zenker <100743.3320@CompuServe.COM>, Wolfgang Schwarz <101511.61@CompuServe.COM>, Jerry KD0CA , jim_kc1fb@usa.pipeline.com (Jim Francoeur KC1FB), DYARNES@aol.com, tavan@tibco.com, "Bob Barry" , dgf@netcom.com (David Feldman), john andrews , Joel Malman , Dean Marzocca , rwright@soml.com (Robert Wright), Anders Wandahl , , rcmcc@cc.bellcore.com (ronald c mcconnell), , Scott Cranston , William McFadden , "Taylor Greg" , Art Winterbauer , , cookes@pop.jaring.my (Siong Teck Cheun @ Joseph), BERGESON@PPCC.CCCOES.EDU, George Gingell , "Doyle, Ron" , "Gert, SM5LWC" , From: lve1@inel.gov (Larry V East) Subject: Preselector Status: RO Norbert, DL8BDF, posted a description of a preselector on QRP-L that he is using with his QRP+. If anyone did not get it and would like a copy, let me know and I will forward a copy. Simply send me email with the following in the message body: send file preselect 72, Larry W1HUE/7 From lve1@inel.gov Fri Sep 27 12:32:56 1996 Received: from eloi.inel.gov (eloi.INEL.GOV [134.20.173.29]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id MAA13698 for ; Fri, 27 Sep 1996 12:32:54 -0400 (EDT) X-Received-x: from eloi.inel.gov (eloi.INEL.GOV [134.20.173.29]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id MAA13698 for ; Fri, 27 Sep 1996 12:32:54 -0400 (EDT) Received: from pc-lve1 ([134.20.194.51]) by eloi.inel.gov (post.office MTA v2.0 0813 ID# 0-12374) with SMTP id AAA18321; Fri, 27 Sep 1996 10:32:55 -0600 Message-Id: <2.2.16.19960927163103.48077f08@eloi> X-Sender: lve1@eloi X-Mailer: Windows Eudora Pro Version 2.2 (16) Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Date: Fri, 27 Sep 1996 10:31:03 -0600 To: pepperb@gov.on.ca, Charlie Lofgren , bkassel@enet.net (Brian Kassel), Paul Erickson , Mike Rioux , John Dundas , af852@rgfn.epcc.Edu (William R Colbert), Bob_Tellefsen-CNSE97@email.mot.com, Christoph Zehntner , GREGOIRE@ENDOR.COM (ERNEST GREGOIRE), jdorson@bbs.mpcs.com (John Dorson), "GaryNye" , Bill Acito , "Mark B. Peterson" <70233.1106@CompuServe.COM>, bfollett@ditell.com, bcutter@teal.csn.net (Bob Cutter), john@antenna.demon.co.uk, "Francis A. McCrackin" , "Richard Hieber" , "JOHN F. McCLUN" , MCDANIELD@ouvaxa.cats.ohiou.edu, Norbert.Heyder@erno.de, N5EM@aol.com, larsennc@alaska.net (Nancy-KL7NY/Jim-AL7FS/Juliann-WL7MP), "Jerry L. Bartachek" , "Alvin G. Gann" , Peter Zenker <100743.3320@CompuServe.COM>, Wolfgang Schwarz <101511.61@CompuServe.COM>, Jerry KD0CA , jim_kc1fb@usa.pipeline.com (Jim Francoeur KC1FB), DYARNES@aol.com, tavan@tibco.com, "Bob Barry" , dgf@netcom.com (David Feldman), john andrews , Joel Malman , Dean Marzocca , rwright@soml.com (Robert Wright), Anders Wandahl , , rcmcc@cc.bellcore.com (ronald c mcconnell), , Scott Cranston , William McFadden , "Taylor Greg" , Art Winterbauer , , cookes@pop.jaring.my (Siong Teck Cheun @ Joseph), BERGESON@PPCC.CCCOES.EDU, George Gingell , "Doyle, Ron" , "Gert, SM5LWC" , From: lve1@inel.gov (Larry V East) Subject: Norbert's Preselector Status: RO There appears to be some confusion/misunderstanding as to the purpose of the preselector that Norbert, DL8BDF, built for his QRP+. Norbert's preselector is intended for use in reducing receiver front-end overload from strong off-frequency signals. This is a big problem in Europe where 100KW+ broadcast stations transmitting in the 31M and 49M bands really raise havoc with broad-band receiver front ends. This is particularly troublesome when operating on 30 and 40M (I know first-hand as I've operated from Europe). Adding a preselector to the QRP+ probably won't make that much difference in North America -- except perhaps on the US east coast. 72, Larry W1HUE/7 (ex OE1ZES, W1HUE/SM3, W1HUE/G, opr 4U1VIC) From Bob_Tellefsen-CNSE97@email.mot.com Fri Sep 27 21:01:34 1996 Received: from motgate2.mot.com (motgate2.mot.com [129.188.136.20]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id VAA17369 for ; Fri, 27 Sep 1996 21:01:33 -0400 (EDT) X-Received-x: from motgate2.mot.com (motgate2.mot.com [129.188.136.20]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id VAA17369 for ; Fri, 27 Sep 1996 21:01:33 -0400 (EDT) Received: from pobox.mot.com (pobox.mot.com [129.188.137.100]) by motgate2.mot.com (8.7.3/8.6.10/MOT-3.8) with ESMTP id AAA01695; Sat, 28 Sep 1996 00:46:33 GMT Received: from azbx.mot.com (azbx.mot.com [129.188.127.40]) by pobox.mot.com (8.7.3/8.6.10/MOT-3.8) with SMTP id NAA08630; Fri, 27 Sep 1996 13:29:33 -0500 (CDT) Received: by azbx.mot.com (1.38.193.5/16.2) id AA06746; Fri, 27 Sep 1996 13:29:18 -0500 Date: Fri, 27 Sep 1996 11:22:00 -0500 From: "Bob Tellefsen-CNSE97" Message-Id: Subject: Re: Norbert's Preselector To: lve1@inel.gov (Receipt Notification Requested), pepperb@gov.on.ca (Receipt Notification Requested), clofgren@BENSON.MCKENNA.EDU (Receipt Notification Requested), bkassel@enet.net (Receipt Notification Requested), paul1@wizard.ucs.sfu.ca (Receipt Notification Requested), mrioux@usa1.com (Receipt Notification Requested), ab6dg@netcom.com (Receipt Notification Requested), af852@rgfn.epcc.Edu (Receipt Notification Requested), zehntner@grd.admin.ch (Receipt Notification Requested), GREGOIRE@ENDOR.COM (Receipt Notification Requested), jdorson@bbs.mpcs.com (Receipt Notification Requested), gcnye@brutus.bright.net (Receipt Notification Requested), acito@ultranet.com (Receipt Notification Requested), 70233.1106@CompuServe.COM (Receipt Notification Requested), bfollett@ditell.com (Receipt Notification Requested), bcutter@teal.csn.net (Receipt Notification Requested), john@antenna.demon.co.uk (Receipt Notification Requested), wb6lma@cdsnet.net (Receipt Notification Requested), Richard.Hieber@rrze.uni-erlangen.de (Receipt Notification Requested), JFM001@DENTAL3.AB.UMD.EDU (Receipt Notification Requested), MCDANIELD@ouvaxa.cats.ohiou.edu (Receipt Notification Requested), Norbert.Heyder@erno.de (Receipt Notification Requested), N5EM@aol.com (Receipt Notification Requested), larsennc@alaska.net (Receipt Notification Requested), jbartac@max.state.ia.us (Receipt Notification Requested), jgann@mindspring.com (Receipt Notification Requested), 100743.3320@CompuServe.COM (Receipt Notification Requested), 101511.61@CompuServe.COM (Receipt Notification Requested), jim_kc1fb@usa.pipeline.com (Receipt Notification Requested), DYARNES@aol.com (Receipt Notification Requested), tavan@tibco.com (Receipt Notification Requested), rbarry@VNET.IBM.COM (Receipt Notification Requested), dgf@netcom.com (Receipt Notification Requested), jm165723@eee.org (Receipt Notification Requested), malman@BBN.COM (Receipt Notification Requested), n2tnn@ifu.net (Receipt Notification Requested), rwright@soml.com (Receipt Notification Requested), aw@lib.kth.se (Receipt Notification Requested), w7ls@brigadoon.com (Receipt Notification Requested), rcmcc@cc.bellcore.com (Receipt Notification Requested), Peter_Simpson@3mail.3Com.COM (Receipt Notification Requested), cranston@zk3.dec.com (Receipt Notification Requested), wmcfadde@oucsace.cs.ohiou.edu (Receipt Notification Requested), GTAYLOR@ag-eco.tamu.edu (Receipt Notification Requested), art@comet.ucar.edu (Receipt Notification Requested), Mark_E_Gustoff@ccm.ch.intel.com (Receipt Notification Requested), cookes@pop.jaring.my (Receipt Notification Requested), BERGESON@PPCC.CCCOES.EDU (Receipt Notification Requested), k3tks@u1.abs.net (Receipt Notification Requested) X400-Mts-Identifier: [ /P=MOT/A=MOT/C=US/ ; c\lmpcc10\960927132457b ] X-Mailer: Worldtalk (4.0.2-p15)/STREAM Status: RO Larry (and group), I'm curious about another potential benefit from a preselector. This is timely as I have been contemplating building one myself. Since we have a front end that is about as selective as a vacuum cleaner, there is a tremendous amount of noise+signal bombarding the front end. My assumption is that a fairly narrow front end filter would reduce the total noise input. My question is whether we would notice any difference on receive. My QRP++ has more gain than I can use, so usually have my rf gain control backed off anyway. Insertion loss doesn't seem likely to be a problem. Wonder if anyone else has already experimented with this? Bob N6WG There appears to be some confusion/misunderstanding as to the purpose of the preselector that Norbert, DL8BDF, built for his QRP+. Norbert's preselector is intended for use in reducing receiver front-end overload from strong off-frequency signals. This is a big problem in Europe where 100KW+ broadcast stations transmitting in the 31M and 49M bands really raise havoc with broad-band receiver front ends. This is particularly troublesome when operating on 30 and 40M (I know first-hand as I've operated from Europe). Adding a preselector to the QRP+ probably won't make that much difference in North America -- except perhaps on the US east coast. 72, Larry W1HUE/7 (ex OE1ZES, W1HUE/SM3, W1HUE/G, opr 4U1VIC) Note: To assure proper delivery to all recipients, the following addresses have been moved from the header: - - - From aw@lib.kth.se Sun Sep 29 16:38:52 1996 Received: from kthbib.lib.kth.se (kthbib.lib.kth.se [130.237.29.3]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with SMTP id QAA21994 for ; Sun, 29 Sep 1996 16:38:46 -0400 (EDT) X-Received-x: from kthbib.lib.kth.se (kthbib.lib.kth.se [130.237.29.3]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with SMTP id QAA21994 for ; Sun, 29 Sep 1996 16:38:46 -0400 (EDT) Date: Sun, 29 Sep 1996 16:38:46 -0400 (EDT) Message-Id: <199609292038.QAA21994@oucsace.cs.ohiou.edu> Received: from sl43.modempool.kth.se by kthbib.lib.kth.se (MX V4.1 AXP) with SMTP; Sun, 29 Sep 1996 21:23:25 MET X-Sender: aw@kthbib.lib.kth.se X-Mailer: Windows Eudora Version 2.1.1 MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable To: "Bob Tellefsen-CNSE97" From: Anders Wandahl Subject: Re: Norbert's Preselector CC: lve1@inel.gov (Receipt Notification Requested), pepperb@gov.on.ca (Receipt Notification Requested), clofgren@BENSON.MCKENNA.EDU (Receipt Notification Requested), bkassel@enet.net (Receipt Notification Requested), paul1@wizard.ucs.sfu.ca (Receipt Notification Requested), mrioux@usa1.com (Receipt Notification Requested), ab6dg@netcom.com (Receipt Notification Requested), af852@rgfn.epcc.Edu (Receipt Notification Requested), zehntner@grd.admin.ch (Receipt Notification Requested), GREGOIRE@ENDOR.COM (Receipt Notification Requested), jdorson@bbs.mpcs.com (Receipt Notification Requested), gcnye@brutus.bright.net (Receipt Notification Requested), acito@ultranet.com (Receipt Notification Requested), 70233.1106@CompuServe.COM (Receipt Notification Requested), bfollett@ditell.com (Receipt Notification Requested), bcutter@teal.csn.net (Receipt Notification Requested), john@antenna.demon.co.uk (Receipt Notification Requested), wb6lma@cdsnet.net (Receipt Notification Requested), Richard.Hieber@rrze.uni-erlangen.de (Receipt Notification Requested), JFM001@DENTAL3.AB.UMD.EDU (Receipt Notification Requested), MCDANIELD@ouvaxa.cats.ohiou.edu (Receipt Notification Requested), Norbert.Heyder@erno.de (Receipt Notification Requested), N5EM@aol.com (Receipt Notification Requested), larsennc@alaska.net (Receipt Notification Requested), jbartac@max.state.ia.us (Receipt Notification Requested), jgann@mindspring.com (Receipt Notification Requested), 100743.3320@CompuServe.COM (Receipt Notification Requested), 101511.61@CompuServe.COM (Receipt Notification Requested), jim_kc1fb@usa.pipeline.com (Receipt Notification Requested), DYARNES@aol.com (Receipt Notification Requested), tavan@tibco.com (Receipt Notification Requested), rbarry@VNET.IBM.COM (Receipt Notification Requested), dgf@netcom.com (Receipt Notification Requested), jm165723@eee.org (Receipt Notification Requested), malman@BBN.COM (Receipt Notification Requested), n2tnn@ifu.net (Receipt Notification Requested), rwright@soml.com (Receipt Notification Requested), aw@lib.kth.se (Receipt Notification Requested), w7ls@brigadoon.com (Receipt Notification Requested), rcmcc@cc.bellcore.com (Receipt Notification Requested), Peter_Simpson@3mail.3Com.COM (Receipt Notification Requested), cranston@zk3.dec.com (Receipt Notification Requested), wmcfadde@oucsace.cs.ohiou.edu (Receipt Notification Requested), GTAYLOR@ag-eco.tamu.edu (Receipt Notification Requested), art@comet.ucar.edu (Receipt Notification Requested), Mark_E_Gustoff@ccm.ch.intel.com (Receipt Notification Requested), cookes@pop.jaring.my (Receipt Notification Requested), BERGESON@PPCC.CCCOES.EDU (Receipt Notification Requested), k3tks@u1.abs.net (Receipt Notification Requested) Status: RO Hi... As said earlier the European situation is somewhat disturbing with such open front end as the QRP+ has. I have until just recently been almost unable to operate on 14 Mhz and above, evenings and nights due to strong QRM from BC stations and also strong coastal stations. The solution in my case was the St. Louis tuner. I must say that now in retrospect I could certainly live with a high SWR (thats what we are in this game for - to put as little power as possible in the air), but the big gain for me was a clean, healthy noise in the receiver. The problems with interferences seems to be dependant on the antenna used, as well. My friend Pea/SM0STM didn't suffer much from this plague at all on his R5, while I had severe problems on my G5RV... Thanks Larry for this dedicated QRP+ list!!=20 72=B4s Anders SM0HPL aw@lib.kth.se From owner-qrp-l@Lehigh.EDU Sun Sep 29 17:17:20 1996 Received: from fidoii.CC.Lehigh.EDU (fidoii.CC.Lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id RAA23078 for ; Sun, 29 Sep 1996 17:17:19 -0400 (EDT) X-Received-x: from fidoii.CC.Lehigh.EDU (fidoii.CC.Lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id RAA23078 for ; Sun, 29 Sep 1996 17:17:19 -0400 (EDT) Received: from Lehigh.EDU ([127.0.0.1]) by fidoii.cc.lehigh.edu with SMTP id <35381-16266>; Sun, 29 Sep 1996 17:16:22 -0400 Received: from nss2.CC.Lehigh.EDU ([128.180.1.26]) by fidoii.cc.lehigh.edu with ESMTP id <34954-16266>; Sun, 29 Sep 1996 17:15:36 -0400 Received: from OBIWAN.ENDOR.COM (SYSTEM@obiwan.endor.com [199.103.183.1]) by nss2.CC.Lehigh.EDU (8.7.5/8.7.3) with SMTP id RAA05107 for ; Sun, 29 Sep 1996 17:15:32 -0400 Received: from Gregoire [199.103.183.143] by OBIWAN.ENDOR.COM with SMTP-OpenVMS via TCP/IP; Sun, 29 Sep 1996 17:16 EDT Message-Id: <199609292115.RAA05107@nss2.CC.Lehigh.EDU> Date: Sun, 29 Sep 1996 17:15:32 -0400 Reply-To: GREGOIRE@ENDOR.COM Sender: owner-qrp-l@Lehigh.EDU Precedence: bulk From: GREGOIRE@ENDOR.COM (ERNEST GREGOIRE) To: "Low Power Amateur Radio Discussion" Subject: QRP+ mods.(RF GAIN,CW PWR ADJ) Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" X-Sender: GREGOIRE@ENDOR.COM X-Mailer: X-Listprocessor-Version: 8.0 -- ListProcessor(tm) by CREN Status: RO Hello Gang, I really am sorry that I missed the CQWW RTTY, contest. RTTY and QRP go together swell and it's another mode to get your DXCC, or WAS, in. I'll be taking part in it next year for sure,and with a rig that is in much more capable. I did that RF gain mod that we discussed here on the list some time ago. While I had the rig all apart, I changed the pot on the rear of the rig. Now I can just reach over the top, and adjust the power by turning a knob. (RF GAIN MOD) Parts: 1, 10k pot, mil.spec. digi-key part no. 308-npc-103 This is a very small carbon pot. 1, .1 mfd. ceramic cap. 1, diode 4148 2, 10k 1/4 watt resistors. 1, machied aluminum knob digi-key part no. 10203nd (CW POWER MOD) Parts: 1, 1k pot mil.spec. digi-key part no. 308-npc-102 1, machined aluminum knob same part no. as above. I had to drill a new hole in the rear of the case. No big deal,really. I lined it up verticaly with the key jack. The new hole near the top of the case. Be sure to push the stack of boards forward when tightening them back down so the jacks stick out as close as possible to the surface of the rear panel. The 1k pot change went smoothly too. I enlarged the cw power hole to give me more play in assembling the rig. That new pot is larger than the old one and it's pretty tight in there. The pins of the pot come bent over so I straightend them out and rebent them to fit the old holes on the pcb. The rig works great with the new mods, and I hope to give it a good test in the next big contest when I wade in among the big guns with my QRP+. I have a digital schmatic of the RF mod. If you would like a copy, I'd be glad to send it to you privately. It is done with Windows Paint brush. I can also send it via S.A.S.E. if you like. de AA1IK N.E.-QRP-C. # 202 ( Lead by example, It is better to ) QRP-L member #95. ( pull a string than it is to push it.) Ernie Gregoire RR 1 Box 221 Canaan, NH. 03741 New England QRP Club, information available on request by sending me a S.A.S.E. or via E-mail. e-mail : GREGOIRE@ENDOR.COM packet : AA1IK@WA1WOK.FN43FE.NH.USA From owner-qrp-l@Lehigh.EDU Mon Sep 30 14:58:42 1996 Received: from fidoii.CC.Lehigh.EDU (fidoii.CC.Lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id OAA16585 for ; Mon, 30 Sep 1996 14:58:38 -0400 (EDT) X-Received-x: from fidoii.CC.Lehigh.EDU (fidoii.CC.Lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id OAA16585 for ; Mon, 30 Sep 1996 14:58:38 -0400 (EDT) Received: from Lehigh.EDU ([127.0.0.1]) by fidoii.cc.lehigh.edu with SMTP id <35159-44543>; Mon, 30 Sep 1996 14:58:04 -0400 Received: from nss2.CC.Lehigh.EDU ([128.180.1.26]) by fidoii.cc.lehigh.edu with ESMTP id <35122-49409>; Mon, 30 Sep 1996 14:57:33 -0400 Received: from motgate2.mot.com (motgate2.mot.com [129.188.136.20]) by nss2.CC.Lehigh.EDU (8.8.0/8.8.0) with ESMTP id OAA51585 for ; Mon, 30 Sep 1996 14:57:25 -0400 Received: from pobox.mot.com (pobox.mot.com [129.188.137.100]) by motgate2.mot.com (8.7.3/8.6.10/MOT-3.8) with ESMTP id SAA10156 for ; Mon, 30 Sep 1996 18:52:50 GMT Received: from azbx.mot.com (azbx.mot.com [129.188.127.40]) by pobox.mot.com (8.7.3/8.6.10/MOT-3.8) with SMTP id NAA21803 for ; Mon, 30 Sep 1996 13:56:28 -0500 (CDT) Received: by azbx.mot.com (1.38.193.5/16.2) id AA07515; Mon, 30 Sep 1996 13:56:18 -0500 Message-Id: Date: Mon, 30 Sep 1996 11:35:00 -0500 Reply-To: Bob_Tellefsen-CNSE97@email.mot.com Sender: owner-qrp-l@Lehigh.EDU Precedence: bulk From: "Bob Tellefsen-CNSE97" To: "Low Power Amateur Radio Discussion" Subject: QRP++ X-To: qrp-l@Lehigh.EDU (Receipt Notification Requested) X-Mailer: Worldtalk (4.0.2-p15)/STREAM X-Listprocessor-Version: 8.0 -- ListProcessor(tm) by CREN Status: RO I have added a very narrow audio filter to the audio section of my QRP++. Works extremely well, but naturally has some insertion loss. This is at the start of the audio chain, so I would like to insert a low-noise audio stage to make up the loss yet not degrade the noise figure. Can anyone suggest a device or circuit that would provide perhaps 10dB gain at low noise? Would need to be single ended for use off the existing 12v supply. Thanks and 72, Bob N6WG From Bob_Tellefsen-CNSE97@email.mot.com Mon Sep 30 16:45:56 1996 Received: from motgate2.mot.com (motgate2.mot.com [129.188.136.20]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id QAA26991 for ; Mon, 30 Sep 1996 16:45:55 -0400 (EDT) X-Received-x: from motgate2.mot.com (motgate2.mot.com [129.188.136.20]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id QAA26991 for ; Mon, 30 Sep 1996 16:45:55 -0400 (EDT) Received: from mothost.mot.com (mothost.mot.com [129.188.137.101]) by motgate2.mot.com (8.7.3/8.6.10/MOT-3.8) with ESMTP id UAA12604; Mon, 30 Sep 1996 20:30:04 GMT Received: from azbx (azbx.mot.com [129.188.127.40]) by mothost.mot.com (8.7.3/8.6.10/MOT-3.8) with SMTP id PAA04966; Mon, 30 Sep 1996 15:33:36 -0500 (CDT) Received: by azbx.mot.com (1.38.193.5/16.2) id AA07527; Mon, 30 Sep 1996 13:56:29 -0500 Date: Mon, 30 Sep 1996 11:50:00 -0500 From: "Bob Tellefsen-CNSE97" Message-Id: Subject: Re: Norbert's Preselector To: lve1@inel.gov (Receipt Notification Requested), pepperb@gov.on.ca (Receipt Notification Requested), clofgren@BENSON.MCKENNA.EDU (Receipt Notification Requested), bkassel@enet.net (Receipt Notification Requested), paul1@wizard.ucs.sfu.ca (Receipt Notification Requested), mrioux@usa1.com (Receipt Notification Requested), ab6dg@netcom.com (Receipt Notification Requested), af852@rgfn.epcc.Edu (Receipt Notification Requested), zehntner@grd.admin.ch (Receipt Notification Requested), GREGOIRE@ENDOR.COM (Receipt Notification Requested), jdorson@bbs.mpcs.com (Receipt Notification Requested), gcnye@brutus.bright.net (Receipt Notification Requested), acito@ultranet.com (Receipt Notification Requested), 70233.1106@CompuServe.COM (Receipt Notification Requested), bfollett@ditell.com (Receipt Notification Requested), bcutter@teal.csn.net (Receipt Notification Requested), john@antenna.demon.co.uk (Receipt Notification Requested), wb6lma@cdsnet.net (Receipt Notification Requested), Richard.Hieber@rrze.uni-erlangen.de (Receipt Notification Requested), JFM001@DENTAL3.AB.UMD.EDU (Receipt Notification Requested), MCDANIELD@ouvaxa.cats.ohiou.edu (Receipt Notification Requested), Norbert.Heyder@erno.de (Receipt Notification Requested), N5EM@aol.com (Receipt Notification Requested), larsennc@alaska.net (Receipt Notification Requested), jbartac@max.state.ia.us (Receipt Notification Requested), jgann@mindspring.com (Receipt Notification Requested), 100743.3320@CompuServe.COM (Receipt Notification Requested), 101511.61@CompuServe.COM (Receipt Notification Requested), jim_kc1fb@usa.pipeline.com (Receipt Notification Requested), DYARNES@aol.com (Receipt Notification Requested), tavan@tibco.com (Receipt Notification Requested), rbarry@VNET.IBM.COM (Receipt Notification Requested), dgf@netcom.com (Receipt Notification Requested), jm165723@eee.org (Receipt Notification Requested), malman@BBN.COM (Receipt Notification Requested), n2tnn@ifu.net (Receipt Notification Requested), rwright@soml.com (Receipt Notification Requested), aw@lib.kth.se (Receipt Notification Requested), w7ls@brigadoon.com (Receipt Notification Requested), rcmcc@cc.bellcore.com (Receipt Notification Requested), Peter_Simpson@3mail.3Com.COM (Receipt Notification Requested), cranston@zk3.dec.com (Receipt Notification Requested), wmcfadde@oucsace.cs.ohiou.edu (Receipt Notification Requested), GTAYLOR@ag-eco.tamu.edu (Receipt Notification Requested), art@comet.ucar.edu (Receipt Notification Requested), Mark_E_Gustoff@ccm.ch.intel.com (Receipt Notification Requested), cookes@pop.jaring.my (Receipt Notification Requested), BERGESON@PPCC.CCCOES.EDU (Receipt Notification Requested), k3tks@u1.abs.net (Receipt Notification Requested) X400-Mts-Identifier: [ /P=MOT/A=MOT/C=US/ ; c\lmpcc10\960930135141f ] X-Mailer: Worldtalk (4.0.2-p15)/STREAM Status: RO I understand Norbert's purpose in filtering his QRP+ front end. My question regards more of a general cleaning up of noise coming in through this very unselective front end. I notice that switching in the attenuator improves the signal to noise ratio, at least in my own location. This leads me to wonder if at least some of the noise I hear is really intermod from noise and signal at other parts of the hf spectrum. The attenuator seems to reduce the input signals below the intermod threshold, thereby reducing the reproduced noise. If this is truly the case, it seems to me a selective filter would also reduce or eliminate the "out of band" noise, without the insertion loss penalty of the attenuator. Does anyone have any experience or thoughts regarding this? 72, Bob N6WG There appears to be some confusion/misunderstanding as to the purpose of the preselector that Norbert, DL8BDF, built for his QRP+. Norbert's preselector is intended for use in reducing receiver front-end overload from strong off-frequency signals. This is a big problem in Europe where 100KW+ broadcast stations transmitting in the 31M and 49M bands really raise havoc with broad-band receiver front ends. This is particularly troublesome when operating on 30 and 40M (I know first-hand as I've operated from Europe). Adding a preselector to the QRP+ probably won't make that much difference in North America -- except perhaps on the US east coast. 72, Larry W1HUE/7 (ex OE1ZES, W1HUE/SM3, W1HUE/G, opr 4U1VIC) Note: To assure proper delivery to all recipients, the following addresses have been moved from the header: - - - From lve1@inel.gov Mon Oct 7 13:30:25 1996 Received: from eloi.inel.gov (eloi.INEL.GOV [134.20.173.29]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id NAA24046 for ; Mon, 7 Oct 1996 13:30:23 -0400 (EDT) X-Received-x: from eloi.inel.gov (eloi.INEL.GOV [134.20.173.29]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id NAA24046 for ; Mon, 7 Oct 1996 13:30:23 -0400 (EDT) Received: from pc-lve1 ([134.20.194.51]) by eloi.inel.gov (post.office MTA v2.0 0813 ID# 0-12374) with SMTP id AAA21775; Mon, 7 Oct 1996 11:30:16 -0600 Message-Id: <2.2.16.19961007172909.279f4866@eloi> X-Sender: lve1@eloi X-Mailer: Windows Eudora Pro Version 2.2 (16) Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Date: Mon, 07 Oct 1996 11:29:09 -0600 To: pepperb@gov.on.ca, Charlie Lofgren , bkassel@enet.net (Brian Kassel), Paul Erickson , Mike Rioux , John Dundas , af852@rgfn.epcc.Edu (William R Colbert), Bob_Tellefsen-CNSE97@email.mot.com, Christoph Zehntner , GREGOIRE@ENDOR.COM (ERNEST GREGOIRE), jdorson@bbs.mpcs.com (John Dorson), "GaryNye" , Bill Acito , "Mark B. Peterson" <70233.1106@CompuServe.COM>, bfollett@ditell.com, bcutter@teal.csn.net (Bob Cutter), john@antenna.demon.co.uk, "Francis A. McCrackin" , "Richard Hieber" , "JOHN F. McCLUN" , MCDANIELD@ouvaxa.cats.ohiou.edu, Norbert.Heyder@erno.de, N5EM@aol.com, larsennc@alaska.net (Nancy-KL7NY/Jim-AL7FS/Juliann-WL7MP), "Jerry L. Bartachek" , "Alvin G. Gann" , Peter Zenker <100743.3320@CompuServe.COM>, Wolfgang Schwarz <101511.61@CompuServe.COM>, Jerry KD0CA , jim_kc1fb@usa.pipeline.com (Jim Francoeur KC1FB), DYARNES@aol.com, tavan@tibco.com, "Bob Barry" , dgf@netcom.com (David Feldman), john andrews , Joel Malman , Dean Marzocca , rwright@soml.com (Robert Wright), Anders Wandahl , , rcmcc@cc.bellcore.com (ronald c mcconnell), , Scott Cranston , William McFadden , "Taylor Greg" , Art Winterbauer , , cookes@pop.jaring.my (Siong Teck Cheun @ Joseph), BERGESON@PPCC.CCCOES.EDU, George Gingell , "Doyle, Ron" , "Gert, SM5LWC" , From: lve1@inel.gov (Larry V East) Subject: RIT/SPLIT indicator LED for QRP+ Status: RO I have a simple little circuit (two NPN transistors, 4 resistors, 1 cap and 1 LED) that I put together to give a visual indication (via an LED) when the XCVE/RIT/SPLIT switch on my QRP+ is NOT in the XCVE position. If interested, send me an email with send rit_led file in the text. The write-up will be sent as email with the schematic attached as a PCX file. If you can't handle attached files, I can get it to you via an SASE or perhaps upload it to an FTP site. If you can't view PCX files (Windows Paintbrush works OK), maybe I can get the schematic into another format (bitmap, Word for Windows, and encapsulated PostScript come immediately to mind). 72, Larry W1HUE/7 From owner-qrp-l@lehigh.edu Mon Nov 4 19:19:51 1996 Received: from fidoii.CC.Lehigh.EDU (fidoii.CC.Lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id TAA05614 for ; Mon, 4 Nov 1996 19:19:50 -0500 (EST) X-Received-x: from fidoii.CC.Lehigh.EDU (fidoii.CC.Lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id TAA05614 for ; Mon, 4 Nov 1996 19:19:50 -0500 (EST) Received: from Lehigh.EDU ([127.0.0.1]) by fidoii.cc.lehigh.edu with SMTP id <35060-42237>; Mon, 4 Nov 1996 19:18:08 -0500 Received: from nss2.CC.Lehigh.EDU ([128.180.1.26]) by fidoii.cc.lehigh.edu with ESMTP id <35048-30463>; Mon, 4 Nov 1996 19:17:14 -0500 Received: from OBIWAN.ENDOR.COM (SYSTEM@obiwan.endor.com [199.103.183.1]) by nss2.CC.Lehigh.EDU (8.8.2/8.8.2) with SMTP id TAA55685 for ; Mon, 4 Nov 1996 19:17:00 -0500 Received: from Gregoire.endor.com [199.103.183.143] by OBIWAN.ENDOR.COM with SMTP-OpenVMS via TCP/IP; Mon, 4 Nov 1996 19:17 EDT Message-Id: <199611050017.TAA55685@nss2.CC.Lehigh.EDU> Date: Mon, 4 Nov 1996 19:17:00 -0500 Reply-To: GREGOIRE@ENDOR.COM Sender: owner-qrp-l@lehigh.edu Precedence: bulk From: GREGOIRE@ENDOR.COM (ERNEST GREGOIRE) To: "Low Power Amateur Radio Discussion" Subject: Re: QRP-Plus upgrade: Worth it? Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" X-Sender: GREGOIRE@ENDOR.COM X-Mailer: X-Listprocessor-Version: 8.0 -- ListProcessor(tm) by CREN Status: RO Hello Emery, I have upgraded the orriginal QRP+ to the latest and greatest model. I believe that beauty is in the eye of the beholder. To me,a resounding yes. It was very much worth it. However!! Also upgraded by me, were the power pot, and also added the R.F. gain modification from Bruce Frankliln. I just tested that RF gain in the SS contest this weekend, and WOW, what a difference it made! This enabled the scaf filter for do it's thing properly. I had superior control of the selectivity of the rig. No contestor should be without this mod. I'll be testing it in the RTTY WAE contest this weekend. If it does for RTTY what it does for CW, I will be very happy. 73 de AA1IK Ernie From owner-qrp-l@Lehigh.EDU Thu Nov 7 09:17:14 1996 Received: from fidoii.CC.Lehigh.EDU (fidoii.CC.Lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id JAA25687 for ; Thu, 7 Nov 1996 09:17:13 -0500 (EST) X-Received-x: from fidoii.CC.Lehigh.EDU (fidoii.CC.Lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id JAA25687 for ; Thu, 7 Nov 1996 09:17:13 -0500 (EST) Received: from Lehigh.EDU ([127.0.0.1]) by fidoii.cc.lehigh.edu with SMTP id <35396-3109>; Thu, 7 Nov 1996 09:15:56 -0500 Received: from nss2.CC.Lehigh.EDU ([128.180.1.26]) by fidoii.cc.lehigh.edu with ESMTP id <35126-3109>; Thu, 7 Nov 1996 09:14:32 -0500 Received: from ns1.ptd.net (root@ns1.ptd.net [198.80.46.1]) by nss2.CC.Lehigh.EDU (8.8.2/8.8.2) with ESMTP id JAA67859 for ; Thu, 7 Nov 1996 09:14:24 -0500 Received: from 204.186.22.38 (cs3-6.con.ptd.net [204.186.22.38]) by ns1.ptd.net (8.8.2/8.8.0) with SMTP id JAA05986; Thu, 7 Nov 1996 09:14:21 -0500 (EST) Message-Id: <3281EE5A.1389@ptdprolog.net> Date: Thu, 07 Nov 1996 09:12:51 -0500 Reply-To: howardsh@ptdprolog.net Sender: owner-qrp-l@Lehigh.EDU Precedence: bulk From: Howard Sherer To: "Low Power Amateur Radio Discussion" Subject: mods wanted for older qrp+ MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-Mailer: Mozilla 3.0 (Macintosh; I; PPC) X-Listprocessor-Version: 8.0 -- ListProcessor(tm) by CREN Status: RO I just bought the older model index labs qrp+ It works great on cw but the ssb output is only 2 w. I saw the mod on yesterdays post to swamp out the alc and will give it a try. Are there any additional mods out there for this rig, and how do I look them up? Howard AE3T From lve1@inel.gov Thu Nov 7 11:11:15 1996 Received: from eloi.inel.gov (eloi.INEL.GOV [134.20.173.29]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id LAA04938 for ; Thu, 7 Nov 1996 11:11:14 -0500 (EST) X-Received-x: from eloi.inel.gov (eloi.INEL.GOV [134.20.173.29]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id LAA04938 for ; Thu, 7 Nov 1996 11:11:14 -0500 (EST) Received: from pc-lve1 ([134.20.194.51]) by eloi.inel.gov (post.office MTA v2.0 0813 ID# 0-12374) with SMTP id AAB4798; Thu, 7 Nov 1996 09:11:23 -0700 Message-Id: <2.2.16.19961107160826.18bf2102@eloi> X-Sender: lve1@eloi X-Mailer: Windows Eudora Pro Version 2.2 (16) Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Date: Thu, 07 Nov 1996 09:08:26 -0700 To: pepperb@gov.on.ca, Charlie Lofgren , bkassel@enet.net (Brian Kassel), Paul Erickson , Mike Rioux , John Dundas , af852@rgfn.epcc.Edu (William R Colbert), Bob_Tellefsen-CNSE97@email.mot.com, Christoph Zehntner , GREGOIRE@ENDOR.COM (ERNEST GREGOIRE), jdorson@bbs.mpcs.com (John Dorson), "GaryNye" , Bill Acito , "Mark B. Peterson" <70233.1106@CompuServe.COM>, bfollett@ditell.com, bcutter@teal.csn.net (Bob Cutter), john@antenna.demon.co.uk, "Francis A. McCrackin" , "Richard Hieber" , "JOHN F. McCLUN" , MCDANIELD@ouvaxa.cats.ohiou.edu, Norbert.Heyder@erno.de, N5EM@aol.com, larsennc@alaska.net (Nancy-KL7NY/Jim-AL7FS/Juliann-WL7MP), "Jerry L. Bartachek" , "Alvin G. Gann" , Peter Zenker <100743.3320@CompuServe.COM>, Wolfgang Schwarz <101511.61@CompuServe.COM>, Jerry KD0CA , jim_kc1fb@usa.pipeline.com (Jim Francoeur KC1FB), DYARNES@aol.com, tavan@tibco.com, "Bob Barry" , dgf@netcom.com (David Feldman), john andrews , Joel Malman , Dean Marzocca , rwright@soml.com (Robert Wright), Anders Wandahl , , rcmcc@cc.bellcore.com (ronald c mcconnell), , Scott Cranston , William McFadden , "Taylor Greg" , Art Winterbauer , , cookes@pop.jaring.my (Siong Teck Cheun @ Joseph), BERGESON@PPCC.CCCOES.EDU, George Gingell , "Doyle, Ron" , "Gert, SM5LWC" , , John Lockhart , Wayne Glover From: lve1@inel.gov (Larry V East) Subject: More SSB Power from "old" QRP+ Status: RO Just in case you missed it, this was posted on QRP-L yesterday: >Date: 06 Nov 96 03:58:39 EST >From: Markus Zimmermann <100724.2637@CompuServe.COM> >To: qrp-l >Subject: [3772] More SSB-power for 'old' QRP+ >Message-ID: <961106085839_100724.2637_EHU143-1@CompuServe.COM> > >Hello QRP+ owner >The max. power in SSB on my QRP+ (ser. nbr. 348) was limited to about 2.2W pep. >That's in my opinion not enough to run a SSB QSO on the lower bands. Since a few >month I tried several modifications, but without success. Last weekend I made >following mod which is very easy and gives you about 5 - 6W SSB power on all >bands. > >Solder across (parallel) to C12 (near to U2 MC334OP) on the AF-PCB board a 10K >trimpot. Adjust for max. power and monitor your signal with an other RX. Now you >are able to reduce the ALC. The modulation is still ok an so far I got good >reports on the band. > >Is this mod new for the group? Anyway good luck and best 72. > >Markus, HB9JNH >G-QRP 5120 > Here are my comments to Markus: >I saw this memtioned by one other person in a private email to me, but I don't think it is generally known. I was going to post it after trying it -- which I haven't done yet. > >I took another route to altering tha ALC, and found that I could increase the SSB power on the lower bands OK but the output audio was badly distorted on the higher bands (15M and above). So, that is something that you should check. 72, Larry W1HUE/7 From owner-qrp-l@lehigh.edu Thu Nov 7 11:46:44 1996 Received: from fidoii.CC.Lehigh.EDU (fidoii.CC.Lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id LAA07554 for ; Thu, 7 Nov 1996 11:46:43 -0500 (EST) X-Received-x: from fidoii.CC.Lehigh.EDU (fidoii.CC.Lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id LAA07554 for ; Thu, 7 Nov 1996 11:46:43 -0500 (EST) Received: from Lehigh.EDU ([127.0.0.1]) by fidoii.cc.lehigh.edu with SMTP id <35166-15394>; Thu, 7 Nov 1996 10:56:13 -0500 Received: from nss2.CC.Lehigh.EDU ([128.180.1.26]) by fidoii.cc.lehigh.edu with ESMTP id <35118-3109>; Thu, 7 Nov 1996 10:55:30 -0500 Received: from mhsgate.meth-mem.org ([198.254.16.35]) by nss2.CC.Lehigh.EDU (8.8.2/8.8.2) with SMTP id KAA171463 for ; Thu, 7 Nov 1996 10:55:16 -0500 Received: from NetWare MHS (SMF71) by mhsgate.meth-mem.org via Connect2-SMTP 4.00; Thu, 7 Nov 96 09:52:36 -0600 Message-Id: <4AB1813201172C16@mhsgate.meth-mem.org> Date: Thu, 7 Nov 96 09:52:10 -0600 Reply-To: cloudm@mhsgate.meth-mem.org Sender: owner-qrp-l@lehigh.edu Precedence: bulk From: Mike Cloud To: "Low Power Amateur Radio Discussion" Subject: RE: mods wanted for older qrp+ X-Sender: cloudm@mhsgate.meth-mem.org X-To: qrp-l@Lehigh.EDU (INTERNET) X-mailer: Connect2-SMTP 4.00 MHS to SMTP Gateway X-Listprocessor-Version: 8.0 -- ListProcessor(tm) by CREN Status: RO > > From: Howard Sherer > >I just bought the older model index labs qrp+ It works great on cw but >the ssb output is only 2 w. I saw the mod on yesterdays post to swamp >out the alc and will give it a try. Are there any additional mods out >there for this rig, and how do I look them up? > >Howard AE3T > Hmmm? My qrp+ is SN #136 and while I rarely (never) use it SSB, when I initially got it I built up a mic from one of the little MFJ ht mics and put it on the air ssb. Using the gain adjustment in the back, I discovered that phone operation output was pretty variable depending on band, with a fairly steady output decline as the frequency increased. The big, but accurate, SWAN watt meter showed that the output ranged from about 12 watts on 80 meters to 7 watts on 10 meters (didn't try 160). The output could always be adjusted to 5 watts. All of this was into a dummy load to avoid antenna reactance. BTW, my qrp+ has not been mod'ded in any way and I plan to keep it that way, hi hi. cul de Mike, KR4IT From owner-qrp-l@Lehigh.EDU Thu Nov 7 11:46:49 1996 Received: from fidoii.CC.Lehigh.EDU (fidoii.CC.Lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id LAA07573 for ; Thu, 7 Nov 1996 11:46:48 -0500 (EST) X-Received-x: from fidoii.CC.Lehigh.EDU (fidoii.CC.Lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id LAA07573 for ; Thu, 7 Nov 1996 11:46:48 -0500 (EST) Received: from Lehigh.EDU ([127.0.0.1]) by fidoii.cc.lehigh.edu with SMTP id <35436-3109>; Thu, 7 Nov 1996 11:29:07 -0500 Received: from nss2.CC.Lehigh.EDU ([128.180.1.26]) by fidoii.cc.lehigh.edu with ESMTP id <35462-3109>; Thu, 7 Nov 1996 11:28:02 -0500 Received: from hungary.it.earthlink.net (hungary-c.it.earthlink.net [204.119.177.64]) by nss2.CC.Lehigh.EDU (8.8.2/8.8.2) with ESMTP id LAA140426 for ; Thu, 7 Nov 1996 11:27:28 -0500 Received: from 206.149.209.81 (max5-wc-ca-31.earthlink.net [206.149.209.81]) by hungary.it.earthlink.net (8.7.5/8.7.3) with SMTP id IAA14927; Thu, 7 Nov 1996 08:27:06 -0800 (PST) Message-Id: <32820E19.7EC6@earthlink.net> Date: Thu, 07 Nov 1996 08:28:09 -0800 Reply-To: kjlopez@earthlink.net Sender: owner-qrp-l@Lehigh.EDU Precedence: bulk From: Ken Lopez To: "Low Power Amateur Radio Discussion" Subject: Re: mods wanted for older qrp+ References: <4AB1813201172C16@mhsgate.meth-mem.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-To: cloudm@mhsgate.meth-mem.org X-Cc: Low Power Amateur Radio Discussion X-Mailer: Mozilla 2.0 (Macintosh; U; 68K) X-Listprocessor-Version: 8.0 -- ListProcessor(tm) by CREN Status: RO My original QRP+, among other problems, had low output and high distortion on SSB. However, this may have been due to poor alignment and adjustment of the ALC. I know of some who did not have this problem, and others who could not adjust the ALC satisfactorily(me), necessitating a mod. Perhaps we are dealing with production changes during the year or so of original production. I would suggest that you call Bruce at Index Labs. He has always been straightforward and helpful with me. Also, the "update" is worth the $. The new QRP++ rig is superb. Ken, N6TZV From owner-qrp-l@Lehigh.EDU Thu Nov 7 11:46:50 1996 Received: from fidoii.CC.Lehigh.EDU (fidoii.CC.Lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id LAA07579 for ; Thu, 7 Nov 1996 11:46:49 -0500 (EST) X-Received-x: from fidoii.CC.Lehigh.EDU (fidoii.CC.Lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id LAA07579 for ; Thu, 7 Nov 1996 11:46:49 -0500 (EST) Received: from Lehigh.EDU ([127.0.0.1]) by fidoii.cc.lehigh.edu with SMTP id <35266-3109>; Thu, 7 Nov 1996 11:11:38 -0500 Received: from nss2.CC.Lehigh.EDU ([128.180.1.26]) by fidoii.cc.lehigh.edu with ESMTP id <35261-3109>; Thu, 7 Nov 1996 11:10:53 -0500 Received: from eloi.inel.gov (eloi.INEL.GOV [134.20.173.29]) by nss2.CC.Lehigh.EDU (8.8.2/8.8.2) with ESMTP id LAA154590 for ; Thu, 7 Nov 1996 11:10:45 -0500 Received: from pc-lve1 ([134.20.194.51]) by eloi.inel.gov (post.office MTA v2.0 0813 ID# 0-12374) with SMTP id AAA4798; Thu, 7 Nov 1996 09:11:20 -0700 Message-Id: <2.2.16.19961107160823.2077ce6c@eloi> Date: Thu, 07 Nov 1996 09:08:23 -0700 Reply-To: lve1@inel.gov Sender: owner-qrp-l@Lehigh.EDU Precedence: bulk From: lve1@inel.gov (Larry V East) To: "Low Power Amateur Radio Discussion" Subject: RE: More SSB-power for 'old' QRP+ Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" X-Cc: Markus Zimmermann <100724.2637@CompuServe.COM> X-Sender: lve1@eloi X-Mailer: Windows Eudora Pro Version 2.2 (16) X-Listprocessor-Version: 8.0 -- ListProcessor(tm) by CREN Status: RO >Is this mod new for the group? Anyway good luck and best 72. > >Markus, HB9JNH >G-QRP 5120 > I saw this memtioned by one other person in a private email to me, but I don't think it is generally known. I was going to post it after trying it -- which I haven't done yet. I took another route to altering tha ALC, and found that I could increase the SSB power on the lower bands OK but the output audio was badly distorted on the higher bands (15M and above). So, that is something that you should check. 72, Larry W1HUE/7 From owner-qrp-l@lehigh.edu Thu Nov 7 11:46:52 1996 Received: from fidoii.CC.Lehigh.EDU (fidoii.CC.Lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id LAA07588 for ; Thu, 7 Nov 1996 11:46:51 -0500 (EST) X-Received-x: from fidoii.CC.Lehigh.EDU (fidoii.CC.Lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id LAA07588 for ; Thu, 7 Nov 1996 11:46:51 -0500 (EST) Received: from Lehigh.EDU ([127.0.0.1]) by fidoii.cc.lehigh.edu with SMTP id <35427-15394>; Thu, 7 Nov 1996 11:25:46 -0500 Received: from nss2.CC.Lehigh.EDU ([128.180.1.26]) by fidoii.cc.lehigh.edu with ESMTP id <35409-36900>; Thu, 7 Nov 1996 11:24:54 -0500 Received: from comet.ucar.edu (spike.comet.ucar.edu [128.117.110.3]) by nss2.CC.Lehigh.EDU (8.8.2/8.8.2) with SMTP id LAA175161 for ; Thu, 7 Nov 1996 11:24:48 -0500 Received: from localhost ([0.0.0.0]) by comet.ucar.edu with SMTP id AA00430 (5.67b/IDA-1.4.4 for qrp-l@Lehigh.EDU); Thu, 7 Nov 1996 09:24:47 -0700 Message-Id: Date: Thu, 7 Nov 1996 09:24:46 -0700 (MST) Reply-To: art@comet.ucar.edu Sender: owner-qrp-l@lehigh.edu Precedence: bulk From: Art Winterbauer To: "Low Power Amateur Radio Discussion" Subject: Fix for damaged QRP+ S-meter Mime-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII X-To: Low Power Amateur Radio Discussion X-Sender: art@spike X-Listprocessor-Version: 8.0 -- ListProcessor(tm) by CREN Status: RO The S-meter on the QRP+ is used for measuring the strength of received signals as well as power output. The one on my rig hasn't been working for about a year now so I wondered if there was a fix for it without having to disassemble the whole thing to get to the meter. I think what messed it up to begin with was a very strong signal. I was testing a HB QRP transmitter by feeding its signal to a dummy load. The QRP+ was hooked up to my station antenna (instead of a little wire). When I was doing this series of tests, in one instance, I forgot to switch down the RF sensitivity on the QRP+. A few days later when using the QRP+ in normal operation, I noticed that received signals barely moved the S-meter, with local, strong hams only pushing it to S5 or so. On transmit, at a full 5 watts, originally the meter would peg. Now it only wiggles spasmodically between S-1 and S-3. Any clues to what damage I've caused? I'd be surprised if the S-meter itself is damaged. I think perhaps some other component(s) may have been damaged. Of course, I'm assuming that the strong signal it received caused this problem to begin with. In all other respects the rig seems to work per usual. This is an older, unmodified QRP+ (S/N 176). Please post your suggestions to the group in case someone else has encountered a similar problem with a QRP+ or other rig. 72! Art WA5OES From owner-qrp-l@Lehigh.EDU Fri Nov 8 07:27:51 1996 Received: from fidoii.CC.Lehigh.EDU (fidoii.CC.Lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id HAA15285 for ; Fri, 8 Nov 1996 07:27:50 -0500 (EST) X-Received-x: from fidoii.CC.Lehigh.EDU (fidoii.CC.Lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id HAA15285 for ; Fri, 8 Nov 1996 07:27:50 -0500 (EST) Received: from Lehigh.EDU ([127.0.0.1]) by fidoii.cc.lehigh.edu with SMTP id <34941-26784>; Fri, 8 Nov 1996 07:27:16 -0500 Received: from nss2.CC.Lehigh.EDU ([128.180.1.26]) by fidoii.cc.lehigh.edu with ESMTP id <34863-42911>; Fri, 8 Nov 1996 07:26:24 -0500 Received: from gatekeeper.admin.ch (gatekeeper.admin.ch [193.5.216.41]) by nss2.CC.Lehigh.EDU (8.8.2/8.8.2) with SMTP id HAA166614 for ; Fri, 8 Nov 1996 07:26:17 -0500 Received: from wep.bb.admin.ch by gatekeeper.admin.ch; (5.65v3.2/1.1.8.2/07Sep95-1159AM) id AA13136; Fri, 8 Nov 1996 13:25:45 +0100 Message-Id: <"45423180116991/302369 GRDMRX*"@MHS> Date: Fri, 8 Nov 1996 13:24:54 +0000 Reply-To: Christoph.Z.C.Zehntner@FS161.grd.admin.ch Sender: owner-qrp-l@Lehigh.EDU Precedence: bulk From: Christoph Zehntner (Tel 031 324 61 16 ) To: "Low Power Amateur Radio Discussion" Subject: re: More SSB-power for 'old' QRP+ X-Cc: lve1@inel.gov X-Listprocessor-Version: 8.0 -- ListProcessor(tm) by CREN Status: RO Hello qrp+ers I have made this mod (6k8 to pin 2 of U2 on AF board) a year ago on my qrp+ (serial number 727), Simon, another ham, has installed it for about 6 months. The power is between 5 and 8 watt and I always get good reports on the audio quality. Sometimes it is reported as sounding slightly compressed. I never checked the signal with measurement instruments. When I told Larry, W1HUE, about the mod two months ago, he wondered if there weren't any distortions. Well, recently I had a lot of trouble with my audio quality: the signal was heavely distorted an hardly understandable. First I removed the mod and it was less distorted but still bad; I listened to it with a second receiver. With a hint of Simon, I found that the distortion was due to rf coupling from my indoor antenna to the rig that was not well grounded either. With my external dipol I still had some coupling from my open feederline and atu. Now I have cleaned it all up, reinstalled the modification on U2 and it works without any problem: again I get nice audio quality reports. So I wonder, if any of you has made similar experiences with rf coupling into the qrp+ and I will be glad to hear from your mod results. I hope, Larry, you could do some real measurements once (and thanks for forwarding Markus' mail). 73 Chris, HB9AJP From lve1@inel.gov Sun Nov 10 14:10:35 1996 Received: from eloi.inel.gov (eloi.INEL.GOV [134.20.173.29]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id OAA29904 for ; Sun, 10 Nov 1996 14:10:33 -0500 (EST) X-Received-x: from eloi.inel.gov (eloi.INEL.GOV [134.20.173.29]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id OAA29904 for ; Sun, 10 Nov 1996 14:10:33 -0500 (EST) Received: from pc-lve1 ([134.20.194.51]) by eloi.inel.gov (post.office MTA v2.0 0813 ID# 0-12374) with SMTP id AAC21743; Sun, 10 Nov 1996 12:10:52 -0700 Message-Id: <2.2.16.19961110190736.1c37d270@eloi> X-Sender: lve1@eloi X-Mailer: Windows Eudora Pro Version 2.2 (16) Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Date: Sun, 10 Nov 1996 12:07:36 -0700 To: pepperb@gov.on.ca, Charlie Lofgren , bkassel@enet.net (Brian Kassel), Paul Erickson , Mike Rioux , John Dundas , af852@rgfn.epcc.Edu (William R Colbert), Bob_Tellefsen-CNSE97@email.mot.com, Christoph Zehntner , GREGOIRE@ENDOR.COM (ERNEST GREGOIRE), jdorson@bbs.mpcs.com (John Dorson), "GaryNye" , Bill Acito , "Mark B. Peterson" <70233.1106@CompuServe.COM>, bfollett@ditell.com, bcutter@teal.csn.net (Bob Cutter), john@antenna.demon.co.uk, "Francis A. McCrackin" , "Richard Hieber" , "JOHN F. McCLUN" , MCDANIELD@ouvaxa.cats.ohiou.edu, Norbert.Heyder@erno.de, N5EM@aol.com, larsennc@alaska.net (Nancy-KL7NY/Jim-AL7FS/Juliann-WL7MP), "Jerry L. Bartachek" , "Alvin G. Gann" , Peter Zenker <100743.3320@CompuServe.COM>, Wolfgang Schwarz <101511.61@CompuServe.COM>, Jerry KD0CA , jim_kc1fb@usa.pipeline.com (Jim Francoeur KC1FB), DYARNES@aol.com, tavan@tibco.com, "Bob Barry" , dgf@netcom.com (David Feldman), john andrews , Joel Malman , Dean Marzocca , rwright@soml.com (Robert Wright), Anders Wandahl , , rcmcc@cc.bellcore.com (ronald c mcconnell), , Scott Cranston , William McFadden , "Taylor Greg" , Art Winterbauer , , cookes@pop.jaring.my (Siong Teck Cheun @ Joseph), BERGESON@PPCC.CCCOES.EDU, George Gingell , "Doyle, Ron" , "Gert, SM5LWC" , , John Lockhart , Wayne Glover From: lve1@inel.gov (Larry V East) Subject: Mystery solved! Status: RO I could never understand how changing a resistor in the QRP++ to reduce the audio level into the SCAF could cure the "AGC Thump" problem. Well, it was finally explained to me in a letter from Bruce Franklin of Index Labs. Bruce wrote: "The new version of the QRP PLUS has back-to-back Shottky diodes [D2 and D3 on the RF board] connected as a limiter on the output IF stage. The purpose of the limiter is to prevent attack overload on the AGC. The limiting should occur about 6 dB above he AGC threshold. Unfortunately, a number of units were shipped with an incorrect value for R33 on the audio PCB. This spoiled the gain relationship with the result that the AGC improvement was not achieved. We sent out a letter and a resistor to he customers to correct the problem. With the correct relationship between the AGC threshold and the limiter, the AGC attack performance is very good on the new version." So... now I know! However, I suspect that the limiter being before the SCAF results in the following problem at narrow SCAF settings: Strong adjacent signals within the IF passband bout outside the SCAF passband will trigger the limiter resulting in the strength of the desired signal being drastically reduced resulting in an "inverse thump" affect. Am I correct? I also suspect that adding my audio limiter mod after the SCAF in a QRP++ with a properly functioning IF limiter will have little, if any affect. Am I correct in this also? I would greatly appreciate it if someone out there in cyberspace could let me know whether or not my assumptions are correct. I need this info for an article that has to be to the editor this coming week. 72, Larry W1HUE/7 From owner-qrp-l@Lehigh.EDU Mon Nov 25 20:56:28 1996 Received: from fidoii.CC.Lehigh.EDU (fidoii.CC.Lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id UAA25657 for ; Mon, 25 Nov 1996 20:56:27 -0500 (EST) X-Received-x: from fidoii.CC.Lehigh.EDU (fidoii.CC.Lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id UAA25657 for ; Mon, 25 Nov 1996 20:56:27 -0500 (EST) Received: from Lehigh.EDU ([127.0.0.1]) by fidoii.cc.lehigh.edu with SMTP id <34980-52009>; Mon, 25 Nov 1996 20:55:50 -0500 Received: from nss2.CC.Lehigh.EDU ([128.180.1.26]) by fidoii.cc.lehigh.edu with ESMTP id <34974-44842>; Mon, 25 Nov 1996 20:55:29 -0500 Received: from emout10.mail.aol.com (emout10.mx.aol.com [198.81.11.25]) by nss2.CC.Lehigh.EDU (8.8.3/8.8.3) with SMTP id UAA178034 for ; Mon, 25 Nov 1996 20:55:23 -0500 Received: by emout10.mail.aol.com (8.6.12/8.6.12) id UAA19379 for QRP-L@lehigh.edu; Mon, 25 Nov 1996 20:54:52 -0500 Message-Id: <961125205451_1951120114@emout10.mail.aol.com> Date: Mon, 25 Nov 1996 20:54:52 -0500 Reply-To: Byron8LCZ@aol.com Sender: owner-qrp-l@Lehigh.EDU Precedence: bulk From: Byron8LCZ@aol.com To: "Low Power Amateur Radio Discussion" Subject: New QRP ant tuner X-To: QRP-L@Lehigh.EDU X-Listprocessor-Version: 8.0 -- ListProcessor(tm) by CREN Status: RO Hi gang, Theres a new QRP antenna tuner on the block. Its the Index Labs "QRP Companion". Same size as the QRP Plus transceiver including the fold out stand on the bottom. It has a LC tuner, has 12 positions on the inductance switch, noise bridge for off the air tune ups, 4.5 amp/hr gell cell battery and wall charger to keep the battery at full charge. It also has a tune/operate toggle switch and a 100/200 toggle switch, that I assume is for adding capacitance . The sheet says it provides excellent results even on 160 meters. It feeds balance or single ended antennas. Price is 195.00 dollars. I just received a flyer today from Index Labs. The weight is not mentioned. 72, Byron WA8LCZ Detroit From owner-qrp-l@Lehigh.EDU Wed Nov 27 00:27:40 1996 Received: from fidoii.CC.Lehigh.EDU (fidoii.CC.Lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id AAA02778 for ; Wed, 27 Nov 1996 00:27:39 -0500 (EST) X-Received-x: from fidoii.CC.Lehigh.EDU (fidoii.CC.Lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id AAA02778 for ; Wed, 27 Nov 1996 00:27:39 -0500 (EST) Received: from Lehigh.EDU ([127.0.0.1]) by fidoii.cc.lehigh.edu with SMTP id <34898-29153>; Wed, 27 Nov 1996 00:27:07 -0500 Received: from nss2.CC.Lehigh.EDU ([128.180.1.26]) by fidoii.cc.lehigh.edu with ESMTP id <34865-3298>; Wed, 27 Nov 1996 00:26:49 -0500 Received: from emout14.mail.aol.com (emout14.mx.aol.com [198.81.11.40]) by nss2.CC.Lehigh.EDU (8.8.3/8.8.3) with SMTP id AAA259518 for ; Wed, 27 Nov 1996 00:26:42 -0500 Received: by emout14.mail.aol.com (8.6.12/8.6.12) id AAA16272 for qrp-l@lehigh.edu; Wed, 27 Nov 1996 00:26:11 -0500 Message-Id: <961127002610_1917745724@emout14.mail.aol.com> Date: Wed, 27 Nov 1996 00:26:11 -0500 Reply-To: DYARNES@aol.com Sender: owner-qrp-l@Lehigh.EDU Precedence: bulk From: DYARNES@aol.com To: "Low Power Amateur Radio Discussion" Subject: Index QRP ++ X-Listprocessor-Version: 8.0 -- ListProcessor(tm) by CREN Status: RO I have a couple of questions--probably these have been discussed before, but I killed my computer so I have lost all my old files from QRP-L. Larry may have addressed this before, but here goes. Frequently (nearly every time) when I turn on my QRP++ I hear noise but no signals. If I turn off the rig and then turn it back on again everything comes to life. I don't remember ever having to turn it on a third time, but nearly always have to turn it on twice. Apparently the microprocessor is stuttering, but is this common? Anyone else have this problem? I haven't talked to Bruce or Tim about it yet. The other problem is something I seem to remember previous comments about. That is that there is a bad problem with blocking from adjacent signals even if they are only "moderately" stronger than the signal I am trying to copy. The adjacent signal needs to be definitely stronger to cause this, but it sure doesn't have to be a barn burner. The variable filter doesn't seem to help much, if any, in these situations. Just wonder what others have experienced. 72 de David W7AQK From owner-qrp-l@Lehigh.EDU Wed Nov 27 17:54:30 1996 Received: from fidoii.CC.Lehigh.EDU (fidoii.CC.Lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id RAA14953 for ; Wed, 27 Nov 1996 17:54:29 -0500 (EST) X-Received-x: from fidoii.CC.Lehigh.EDU (fidoii.CC.Lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id RAA14953 for ; Wed, 27 Nov 1996 17:54:29 -0500 (EST) Received: from Lehigh.EDU ([127.0.0.1]) by fidoii.cc.lehigh.edu with SMTP id <34842-14560>; Wed, 27 Nov 1996 17:54:04 -0500 Received: from nss2.CC.Lehigh.EDU ([128.180.1.26]) by fidoii.cc.lehigh.edu with ESMTP id <34840-14560>; Wed, 27 Nov 1996 17:53:18 -0500 Received: from eloi.inel.gov (eloi.INEL.GOV [134.20.173.29]) by nss2.CC.Lehigh.EDU (8.8.3/8.8.3) with ESMTP id RAA178105 for ; Wed, 27 Nov 1996 17:53:07 -0500 Received: from pc-lve1 ([134.20.194.51]) by eloi.inel.gov (post.office MTA v2.0 0813 ID# 0-12374) with SMTP id AAA15654; Wed, 27 Nov 1996 15:53:42 -0700 Message-Id: <2.2.16.19961127224737.12a7b7f8@eloi> Date: Wed, 27 Nov 1996 15:47:37 -0700 Reply-To: lve1@inel.gov Sender: owner-qrp-l@Lehigh.EDU Precedence: bulk From: lve1@inel.gov (Larry V East) To: "Low Power Amateur Radio Discussion" Subject: RE: QRP++ Questions Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" X-Cc: DYARNES@aol.com X-Sender: lve1@eloi X-Mailer: Windows Eudora Pro Version 2.2 (16) X-Listprocessor-Version: 8.0 -- ListProcessor(tm) by CREN Status: RO In a recent post, David W7AQK asked: >The other problem is something I seem to remember previous comments about. > That is that there is a bad problem with blocking from adjacent signals even >if they are only "moderately" stronger than the signal I am trying to copy. > The adjacent signal needs to be definitely stronger to cause this, but it >sure doesn't have to be a barn burner. The variable filter doesn't seem to >help much, if any, in these situations. > This problem results from the "fix" made by Index to solve the "AGC Thump" problem in the QRP++: A limiter (consisting of two diodes) is located at the output of the IF amp to keep the signal level entering the SCAF filter at a reasonable level so that the AGC has time to respond to strong signals. (The signal delay time through the SCAF was the cause of the "Thump" on strong signals; the limiter keeps signal levels from exceeding the AGC threshold by more than a few DB until the AGC has time to respond.) Anyway, the down-side is that strong signals outside the SCAF passband will activate the limiter, thus also limiting the amplitude of signals within the SCAF passband. Narrowing the SCAF only makes matters worse in a crowded band! (Kinda obviates the advantage of a narrow filter...). My solution to the "AGC Thump" problem in the QRP+ was to add a limiter AFTER the SCAF. Strong signals outside the SCAF bandpass might still overload the SCAF causing some strange "squeaks" and "howls", but at least they do not result in signals within the SCAF passband being attenuated. Unfortunately, the IF limiter in the QRP++ cannot be simply deactivated because it is also used during transmit to limit the amplitude of the RF signal feeding the driver amplifier. In fact, it is this limiter that provides the "speech processing" in SSB mode! So... what to do? I don't know, other than add an RF gain control which can be used to reduce the strength of the offending signal(s). A simple RF gain control circuit is available from Index (I have .bmp file that I can send anyone who is interested); the big problem is figuring out where to put an RF gain control pot! About the only alternatives are on the back, top of side of the rig. As for the receiver having to be turned on twice before signals come out, this sounds like a reset problem in the SCAF filter. I managed to "self-inflict" such a problem in my QRP+ when I increased the size of a bypass cap which turned out to cause the SCAF reset line to rise too slowly to affect a reset. Sounds like your rig has a similar problem; I suggest that you contact Index. 72 and have a great Turkey Day, Larry W1HUE/7 PS -- Don't forget the Fox Hunt tonight (Wednesday)! :-) From owner-qrp-l@Lehigh.EDU Thu Nov 28 09:28:43 1996 Received: from fidoii.CC.Lehigh.EDU (fidoii.CC.Lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id JAA18092 for ; Thu, 28 Nov 1996 09:28:43 -0500 (EST) X-Received-x: from fidoii.CC.Lehigh.EDU (fidoii.CC.Lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id JAA18092 for ; Thu, 28 Nov 1996 09:28:43 -0500 (EST) Received: from Lehigh.EDU ([127.0.0.1]) by fidoii.cc.lehigh.edu with SMTP id <35260-20818>; Thu, 28 Nov 1996 09:28:12 -0500 Received: from nss2.CC.Lehigh.EDU ([128.180.1.26]) by fidoii.cc.lehigh.edu with ESMTP id <35254-20818>; Thu, 28 Nov 1996 09:27:33 -0500 Received: from magicnet.magicnet.net (root@magicnet.magicnet.net [204.96.116.9]) by nss2.CC.Lehigh.EDU (8.8.3/8.8.3) with SMTP id JAA222928 for ; Thu, 28 Nov 1996 09:27:25 -0500 Received: from ns.magicnet.net (pm13-09.magicnet.net [206.104.204.138]) by magicnet.magicnet.net (8.6.13/8.6.12) with SMTP id JAA22839 for ; Thu, 28 Nov 1996 09:27:23 -0500 Message-Id: <3.0.32.19961128102944.006ea234@mailhost.magicnet.net> Date: Thu, 28 Nov 1996 10:29:47 -0500 Reply-To: wa8dxd@magicnet.net Sender: owner-qrp-l@Lehigh.EDU Precedence: bulk From: Tom Arvo To: "Low Power Amateur Radio Discussion" Subject: INDEX LABS QRP COMPANION Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" X-To: "Low Power Amateur Radio Discussion" X-Sender: wa8dxd@mailhost.magicnet.net X-Mailer: Windows Eudora Pro Version 3.0 (32) X-Listprocessor-Version: 8.0 -- ListProcessor(tm) by CREN Status: RO Hi All: We recently received a flyer with info on this latest accessory for the QRP+ from Index Labs. The photo/info is posted on our web site: http://www.qrpworld.com/qrpcomp.htm There is also an RFGain mod provided by Index Labs posted. 73 & HAPPY THANKSGIVING! Tom WA8DXD From owner-qrp-l@Lehigh.EDU Thu Nov 28 11:59:22 1996 Received: from fidoii.CC.Lehigh.EDU (fidoii.CC.Lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id LAA21290 for ; Thu, 28 Nov 1996 11:59:21 -0500 (EST) X-Received-x: from fidoii.CC.Lehigh.EDU (fidoii.CC.Lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id LAA21290 for ; Thu, 28 Nov 1996 11:59:21 -0500 (EST) Received: from Lehigh.EDU ([127.0.0.1]) by fidoii.cc.lehigh.edu with SMTP id <35094-17233>; Thu, 28 Nov 1996 11:58:58 -0500 Received: from nss2.CC.Lehigh.EDU ([128.180.1.26]) by fidoii.cc.lehigh.edu with ESMTP id <34839-17233>; Thu, 28 Nov 1996 11:57:59 -0500 Received: from x4.boston.juno.com (x4.boston.juno.com [205.231.101.22]) by nss2.CC.Lehigh.EDU (8.8.3/8.8.3) with ESMTP id LAA109456 for ; Thu, 28 Nov 1996 11:57:45 -0500 Received: (from n4so@juno.com) by x4.boston.juno.com (queuemail) id LAC15800; Thu, 28 Nov 1996 11:56:50 EST Message-Id: <19961128.104739.7375.9.n4so@juno.com> Date: Thu, 28 Nov 1996 11:56:50 EST Reply-To: n4so@juno.com Sender: owner-qrp-l@Lehigh.EDU Precedence: bulk From: n4so@juno.com (CHARLES K BROWN) To: "Low Power Amateur Radio Discussion" Subject: QRP COMPANION X-Mailer: Juno 1.15 X-Juno-Line-Breaks: 0-21,23-51 X-Listprocessor-Version: 8.0 -- ListProcessor(tm) by CREN Status: RO Subject: Re: INDEX LABS QRP COMPANION This is a copy of a WWW file from Tom WA8DXD QRP COMPANION The most used accessories for the QRP PLUS Transceiver packaged in a matching cabinet! =B7 Antenna Tuner =B7 Noise Bridge =B7 Gel Cell Battery =B7 Charger Antenna Tuner: Wide matching rang( provides excellent results even on 160M. Simple, unambiguous adjustment with two controls. Feeds balanced and single ended antennas. Noise Bridge: Accurately set the tuner on receive. No need for on-air tune up. 4 1/2 AMP Hour Gel Cell Battery: Self contained battery provides a weekend of operation on a single charge.= Charger: A wall type supply maintains the battery at full charge. Designed and Built in the U.S.A. Price: $195.00 - VISA/MASTERCARD Accepted INDEX LABORATORIES 9318 Randall Dr. NW, Gig Harbor, WA 98332 Tel: 206.851.5725 / Fax: 206.851.8385 ----------------------------------------------- 73 & Happy Turkey Day, Tom WA8DXD %%%%%%%%%%%%%%%%%%%%%%% Ken Brown, N4SO QTH Near Mobile, AL QRP-L #622 n4so@juno.com From owner-qrp-l@Lehigh.EDU Fri Nov 29 16:53:39 1996 Received: from fidoii.CC.Lehigh.EDU (fidoii.CC.Lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id QAA07294 for ; Fri, 29 Nov 1996 16:53:38 -0500 (EST) X-Received-x: from fidoii.CC.Lehigh.EDU (fidoii.CC.Lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id QAA07294 for ; Fri, 29 Nov 1996 16:53:38 -0500 (EST) Received: from Lehigh.EDU ([127.0.0.1]) by fidoii.cc.lehigh.edu with SMTP id <34913-24102>; Fri, 29 Nov 1996 16:53:21 -0500 Received: from nss2.CC.Lehigh.EDU ([128.180.1.26]) by fidoii.cc.lehigh.edu with ESMTP id <34890-24102>; Fri, 29 Nov 1996 16:52:40 -0500 Received: from eloi.inel.gov (eloi.INEL.GOV [134.20.173.29]) by nss2.CC.Lehigh.EDU (8.8.3/8.8.3) with ESMTP id QAA167721 for ; Fri, 29 Nov 1996 16:52:29 -0500 Received: from pc-lve1 ([134.20.194.51]) by eloi.inel.gov (post.office MTA v2.0 0813 ID# 0-12374) with SMTP id AAD1388 for ; Fri, 29 Nov 1996 14:53:03 -0700 Message-Id: <2.2.16.19961129095123.28578f7a@eloi> Date: Fri, 29 Nov 1996 02:51:23 -0700 Reply-To: lve1@inel.gov Sender: owner-qrp-l@Lehigh.EDU Precedence: bulk From: lve1@inel.gov (Larry V East) To: "Low Power Amateur Radio Discussion" Subject: The latest from INDEX... Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" X-Sender: lve1@eloi X-Mailer: Windows Eudora Pro Version 2.2 (16) X-Listprocessor-Version: 8.0 -- ListProcessor(tm) by CREN Status: RO >QRP COMPANION > >The most used accessories for the QRP PLUS Transceiver >packaged in a matching cabinet! > >=B7 Antenna Tuner >=B7 Noise Bridge >=B7 Gel Cell Battery >=B7 Charger > ...snip snip... > >Price: $195.00 - VISA/MASTERCARD Accepted > Hmmm... Lets see now: - MFJ Random Wire Tuner: $49.95 - Noise bridge: $39.95 - 6AH GelCell from WalMart: $24.95 - Wall Charger from RS: $12.95 Total comes to $127.80. Hmmm... for only $67.20 more, I can get all this in one little box. Just thinking out loud... :-) :-) From owner-qrp-l@Lehigh.EDU Mon Dec 2 12:19:39 1996 Received: from fidoii.CC.Lehigh.EDU (fidoii.CC.Lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id MAA09652 for ; Mon, 2 Dec 1996 12:19:38 -0500 (EST) X-Received-x: from fidoii.CC.Lehigh.EDU (fidoii.CC.Lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id MAA09652 for ; Mon, 2 Dec 1996 12:19:38 -0500 (EST) Received: from Lehigh.EDU ([127.0.0.1]) by fidoii.cc.lehigh.edu with SMTP id <35075-17404>; Mon, 2 Dec 1996 12:10:34 -0500 Received: from nss2.CC.Lehigh.EDU ([128.180.1.26]) by fidoii.cc.lehigh.edu with ESMTP id <35048-23033>; Mon, 2 Dec 1996 12:03:45 -0500 Received: from upsmot03.msn.com (upsmot03.msn.com [204.95.110.85]) by nss2.CC.Lehigh.EDU (8.8.3/8.8.3) with SMTP id MAA215102 for ; Mon, 2 Dec 1996 12:03:17 -0500 Received: from upmajb02.msn.com (upmajb02.msn.com [204.95.110.74]) by upsmot03.msn.com (8.6.8.1/Configuration 4) with SMTP id JAA00879 for ; Mon, 2 Dec 1996 09:01:51 -0800 Message-Id: Date: Mon, 2 Dec 96 16:53:15 UT Reply-To: ki6pr@msn.com Sender: owner-qrp-l@Lehigh.EDU Precedence: bulk From: "Mike Siegel" To: "Low Power Amateur Radio Discussion" Subject: QRP Companion X-Listprocessor-Version: 8.0 -- ListProcessor(tm) by CREN Status: RO Gee, I wish Bruce had come out with Index's QRP Companion, TWO YEARS AGO, when I wanted it (and when he was promoting it). Since that time, I have come up with several small antenna tuners and batter/charger systems, for my home and field operations. So now, at $200, the Index rig becomes a very low priority on my shopping list...may be after I get the rest of my gear squared away...? 72/3, Mike KI6PR El Rancho R.F., CA From lve1@inel.gov Wed Dec 11 15:44:48 1996 Received: from eloi.inel.gov (eloi.INEL.GOV [134.20.173.29]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id PAA07332 for ; Wed, 11 Dec 1996 15:44:44 -0500 (EST) X-Received-x: from eloi.inel.gov (eloi.INEL.GOV [134.20.173.29]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id PAA07332 for ; Wed, 11 Dec 1996 15:44:44 -0500 (EST) Received: from pc-lve1 ([134.20.194.51]) by eloi.inel.gov (post.office MTA v2.0 0813 ID# 0-12374) with SMTP id AAA28505; Wed, 11 Dec 1996 13:44:47 -0700 Message-Id: <2.2.16.19961211204202.331f987a@eloi> X-Sender: lve1@eloi X-Mailer: Windows Eudora Pro Version 2.2 (16) Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" X-Priority: 2 (High) Date: Wed, 11 Dec 1996 13:42:02 -0700 To: pepperb@gov.on.ca, Charlie Lofgren , bkassel@enet.net (Brian Kassel), Paul Erickson , Mike Rioux , John Dundas , af852@rgfn.epcc.Edu (William R Colbert), Bob_Tellefsen-CNSE97@email.mot.com, Christoph Zehntner , GREGOIRE@ENDOR.COM (ERNEST GREGOIRE), jdorson@bbs.mpcs.com (John Dorson), "GaryNye" , Bill Acito , "Mark B. Peterson" <70233.1106@CompuServe.COM>, bfollett@ditell.com, bcutter@teal.csn.net (Bob Cutter), john@antenna.demon.co.uk, "Francis A. McCrackin" , "Richard Hieber" , "JOHN F. McCLUN" , MCDANIELD@ouvaxa.cats.ohiou.edu, Norbert.Heyder@erno.de, N5EM@aol.com, larsennc@alaska.net (Nancy-KL7NY/Jim-AL7FS/Juliann-WL7MP), "Jerry L. Bartachek" , "Alvin G. Gann" , Peter Zenker <100743.3320@CompuServe.COM>, Wolfgang Schwarz <101511.61@CompuServe.COM>, Jerry KD0CA , jim_kc1fb@usa.pipeline.com (Jim Francoeur KC1FB), DYARNES@aol.com, tavan@tibco.com, "Bob Barry" , dgf@netcom.com (David Feldman), john andrews , Joel Malman , Dean Marzocca , rwright@soml.com (Robert Wright), Anders Wandahl , , rcmcc@cc.bellcore.com (ronald c mcconnell), , Scott Cranston , William McFadden , "Taylor Greg" , Art Winterbauer , , cookes@pop.jaring.my (Siong Teck Cheun @ Joseph), BERGESON@PPCC.CCCOES.EDU, George Gingell , "Doyle, Ron" , "Gert, SM5LWC" , , John Lockhart , Wayne Glover From: lve1@inel.gov (Larry V East) Subject: QRP+/QRP++ SSB Questions Status: RO I need some help from you QRP+/QRP++ owners out there in cyberspace: 1. Have you measured the total current drain when transmitting in SSB mode with no output (mic gain all the way down)? If so, what value did you get? 2. Have you attempted to adjust the gate bias on the IRF510 final? What were your results> 3. Have you ever looked at the RF output on a 'scope while feeding a two-tone signal into the mic input? If so, what maximum peak power could you get before the output waveshape began to flatten? (On what bands did you look at the SSB output? Did you disable the ALC?) Any input from the field would be much appreciated. Please indicate whether the measurements were made on an Original QRP+, Upgraded QRP+ or New Improved QRP+ (production version). Thanks in advance. I have tried to squeeze some info out of INDEX, but no response as of yet. Bruce Franklin ("Mr. INDEX Labs") was very quick to respond with some comments (all helpful and none negative, I might point out) when I sent him a draft of a QRP+ receiver mods article that will appear in the January QRP Quarterly, but otherwise he seems to ignore letters and not return phone calls. _________________________________________________________ "Any opinions expressed herein are my own and probably do not agree with those of my employer, the U.S. Government or my spouse" --... ...-- Larry V. East (W1HUE) Idaho Falls, ID e-mail: LVE1@inel.gov work: (208) 526-0081 home: (208) 529-2162 From owner-qrp-l@Lehigh.EDU Fri Dec 13 12:17:26 1996 Received: from fidoii.CC.Lehigh.EDU (fidoii.CC.Lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id MAA20528 for ; Fri, 13 Dec 1996 12:17:26 -0500 (EST) X-Received-x: from fidoii.CC.Lehigh.EDU (fidoii.CC.Lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id MAA20528 for ; Fri, 13 Dec 1996 12:17:26 -0500 (EST) Received: from Lehigh.EDU ([127.0.0.1]) by fidoii.cc.lehigh.edu with SMTP id <35567-16246>; Fri, 13 Dec 1996 12:15:55 -0500 Received: from nss2.CC.Lehigh.EDU ([128.180.1.26]) by fidoii.cc.lehigh.edu with ESMTP id <35534-37240>; Fri, 13 Dec 1996 12:13:55 -0500 Received: from eloi.inel.gov (eloi.INEL.GOV [134.20.173.29]) by nss2.CC.Lehigh.EDU (8.8.4/8.8.4) with ESMTP id MAA219848 for ; Fri, 13 Dec 1996 12:13:33 -0500 Received: from pc-lve1 ([134.20.194.51]) by eloi.inel.gov (post.office MTA v2.0 0813 ID# 0-12374) with SMTP id AAA6642 for ; Fri, 13 Dec 1996 10:13:47 -0700 Message-Id: <2.2.16.19961213171049.37d732f4@eloi> Date: Fri, 13 Dec 1996 10:10:49 -0700 Reply-To: lve1@inel.gov Sender: owner-qrp-l@Lehigh.EDU Precedence: bulk From: lve1@inel.gov (Larry V East) To: "Low Power Amateur Radio Discussion" Subject: QRP+/QRP++ SSB Questions Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" X-Sender: lve1@eloi X-Mailer: Windows Eudora Pro Version 2.2 (16) X-Priority: 2 (High) X-Listprocessor-Version: 8.0 -- ListProcessor(tm) by CREN Status: RO I need some help from you QRP+/QRP++ owners out there in cyberspace: 1. Have you measured the total current drain when transmitting in SSB mode with no output (mic gain all the way down)? If so, what value did you get? 2. Have you attempted to adjust the gate bias on the IRF510 final? What were your results> 3. Have you ever looked at the RF output on a 'scope while feeding a two-tone signal into the mic input? If so, what maximum peak power could you get before the output waveshape began to flatten? (On what bands did you look at the SSB output? Did you disable the ALC?) Any input from the field would be much appreciated so that I can compare your results with mine. Please indicate whether the measurements were made on an Original QRP+, Upgraded QRP+ or New Improved QRP+ (production version). Thanks in advance. Please email direct. 72, Larry W1HUE/7 _________________________________________________________ "Any opinions expressed herein are my own and probably do not agree with those of my employer, the U.S. Government or my spouse" --... ...-- Larry V. East (W1HUE) Idaho Falls, ID e-mail: LVE1@inel.gov work: (208) 526-0081 home: (208) 529-2162 From owner-qrp-l@Lehigh.EDU Sat Dec 14 16:12:38 1996 Received: from fidoii.CC.Lehigh.EDU (fidoii.CC.Lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id QAA14279 for ; Sat, 14 Dec 1996 16:12:37 -0500 (EST) X-Received-x: from fidoii.CC.Lehigh.EDU (fidoii.CC.Lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id QAA14279 for ; Sat, 14 Dec 1996 16:12:37 -0500 (EST) Received: from Lehigh.EDU ([127.0.0.1]) by fidoii.cc.lehigh.edu with SMTP id <34963-30596>; Sat, 14 Dec 1996 16:12:03 -0500 Received: from nss2.CC.Lehigh.EDU ([128.180.1.26]) by fidoii.cc.lehigh.edu with ESMTP id <34870-40070>; Sat, 14 Dec 1996 16:11:10 -0500 Received: from admin.cyberenet.net (root@admin.cyberenet.net [204.213.252.6]) by nss2.CC.Lehigh.EDU (8.8.4/8.8.4) with SMTP id QAA240293 for ; Sat, 14 Dec 1996 16:11:03 -0500 Received: from ux1.cyberenet.net by admin.cyberenet.net with smtp (Smail3.1.29.1 #7) id m0vZ1L3-000NzRC; Sat, 14 Dec 96 16:09 EST Received: from [206.106.174.44] by ux1.cyberenet.net with smtp (Smail3.1.29.1 #8) id m0vZ1aP-0006FGC; Sat, 14 Dec 96 16:25 EST Message-Id: Date: Sat, 14 Dec 1996 15:04:40 -0500 Reply-To: jsielke@pobox.com Sender: owner-qrp-l@Lehigh.EDU Precedence: bulk From: NJBIRDMAN To: "Low Power Amateur Radio Discussion" Subject: QRP Plus Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" X-Sender: jsielke@mail.cyberenet.net X-Listprocessor-Version: 8.0 -- ListProcessor(tm) by CREN Status: RO Anyone have any first-hand experience on the "QRP Plus" transciever from Index Inc? I have seen the ads in QST, and it looks very impressive, although expensive. Just curious for now. _ _ _ _ _ ___ | \| || | | _ | |/ __| | .` ||_ _|| || |\__ \ |_|\_| |_| \__/ |___/ John L. Sielke jsielke@pobox.com n4js@n4js.ampr.org QRP-L #884 NJ Grid:FM29 http://www.pobox.com/~jsielke From jsielke@pobox.com Sat Dec 14 16:45:06 1996 Received: from admin.cyberenet.net (root@admin.cyberenet.net [204.213.252.6]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with SMTP id QAA15307 for ; Sat, 14 Dec 1996 16:45:06 -0500 (EST) X-Received-x: from admin.cyberenet.net (root@admin.cyberenet.net [204.213.252.6]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with SMTP id QAA15307 for ; Sat, 14 Dec 1996 16:45:06 -0500 (EST) Received: from ux1.cyberenet.net by admin.cyberenet.net with smtp (Smail3.1.29.1 #7) id m0vZ1rz-000O0VC; Sat, 14 Dec 96 16:43 EST Received: from [206.106.174.44] by ux1.cyberenet.net with smtp (Smail3.1.29.1 #8) id m0vZ27W-0006FGC; Sat, 14 Dec 96 16:59 EST X-Sender: jsielke@mail.cyberenet.net Message-Id: In-Reply-To: <199612142129.QAA14817@oucsace.cs.ohiou.edu> References: from "NJBIRDMAN" at Dec 14, 96 03:04:40 pm Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Date: Sat, 14 Dec 1996 16:44:57 -0500 To: William McFadden From: NJBIRDMAN Subject: Re: QRP Plus Status: RO > >My web page contains a pretty comprehensive archive of the discussions >from QRP-L about the QRP+ and the QRP++. Please feel free to visit to >read these articles. > >My web page address is in the signature, below. Follow the link to >"Amateur Radio", then to "Archives and Articles". > I went to your web page. So much info I downloaded the archives to read offline! Thanks very much! I notice INDEX does not have an ad in December QST, so may be a moot point... _ _ _ _ _ ___ | \| || | | _ | |/ __| | .` ||_ _|| || |\__ \ |_|\_| |_| \__/ |___/ John L. Sielke jsielke@pobox.com n4js@n4js.ampr.org QRP-L #884 NJ Grid:FM29 http://www.pobox.com/~jsielke From owner-qrp-l@Lehigh.EDU Sat Dec 14 18:54:32 1996 Received: from fidoii.CC.Lehigh.EDU (fidoii.CC.Lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id SAA18319 for ; Sat, 14 Dec 1996 18:54:31 -0500 (EST) X-Received-x: from fidoii.CC.Lehigh.EDU (fidoii.CC.Lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id SAA18319 for ; Sat, 14 Dec 1996 18:54:31 -0500 (EST) Received: from Lehigh.EDU ([127.0.0.1]) by fidoii.cc.lehigh.edu with SMTP id <35080-30596>; Sat, 14 Dec 1996 18:54:16 -0500 Received: from nss2.CC.Lehigh.EDU ([128.180.1.26]) by fidoii.cc.lehigh.edu with ESMTP id <34848-16263>; Sat, 14 Dec 1996 18:53:32 -0500 Received: from admin.cyberenet.net (root@admin.cyberenet.net [204.213.252.6]) by nss2.CC.Lehigh.EDU (8.8.4/8.8.4) with SMTP id SAA214748 for ; Sat, 14 Dec 1996 18:53:19 -0500 Received: from ux1.cyberenet.net by admin.cyberenet.net with smtp (Smail3.1.29.1 #7) id m0vZ3s5-000NzaC; Sat, 14 Dec 96 18:51 EST Received: from [206.106.174.44] by ux1.cyberenet.net with smtp (Smail3.1.29.1 #8) id m0vZ48H-0006FKC; Sat, 14 Dec 96 19:08 EST Message-Id: Date: Sat, 14 Dec 1996 18:53:08 -0500 Reply-To: jsielke@pobox.com Sender: owner-qrp-l@Lehigh.EDU Precedence: bulk From: NJBIRDMAN To: "Low Power Amateur Radio Discussion" Subject: Thanks (Re; QRP+) Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" X-Sender: jsielke@mail.cyberenet.net X-Listprocessor-Version: 8.0 -- ListProcessor(tm) by CREN Status: RO I got a LOT of responses to my query about the INDEX LABS QRP+. Thanks to all those that responded. I dowloaded all the QRP-L archives on the rig. At least for a change, I'll be an informed shopper ;-) Let you know when/if If get it. John Lehigh Class of '66 _ _ _ _ _ ___ | \| || | | _ | |/ __| | .` ||_ _|| || |\__ \ |_|\_| |_| \__/ |___/ John L. Sielke jsielke@pobox.com n4js@n4js.ampr.org QRP-L #884 NJ Grid:FM29 http://www.pobox.com/~jsielke From lve1@inel.gov Mon Dec 16 12:27:24 1996 Received: from eloi.inel.gov (eloi.INEL.GOV [134.20.173.29]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id MAA07210 for ; Mon, 16 Dec 1996 12:27:21 -0500 (EST) X-Received-x: from eloi.inel.gov (eloi.INEL.GOV [134.20.173.29]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id MAA07210 for ; Mon, 16 Dec 1996 12:27:21 -0500 (EST) Received: from pc-lve1 ([134.20.194.51]) by eloi.inel.gov (post.office MTA v2.0 0813 ID# 0-12374) with SMTP id AAA26089; Mon, 16 Dec 1996 10:27:10 -0700 Message-Id: <2.2.16.19961216172605.18bfcd1e@eloi> X-Sender: lve1@eloi X-Mailer: Windows Eudora Pro Version 2.2 (16) Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Date: Mon, 16 Dec 1996 10:26:05 -0700 To: pepperb@gov.on.ca, Charlie Lofgren , bkassel@enet.net (Brian Kassel), Paul Erickson , Mike Rioux , John Dundas , af852@rgfn.epcc.Edu (William R Colbert), Bob_Tellefsen-CNSE97@email.mot.com, Christoph Zehntner , GREGOIRE@ENDOR.COM (ERNEST GREGOIRE), jdorson@bbs.mpcs.com (John Dorson), "GaryNye" , Bill Acito , "Mark B. Peterson" <70233.1106@CompuServe.COM>, bfollett@ditell.com, bcutter@teal.csn.net (Bob Cutter), john@antenna.demon.co.uk, "Francis A. McCrackin" , "Richard Hieber" , "JOHN F. McCLUN" , MCDANIELD@ouvaxa.cats.ohiou.edu, Norbert.Heyder@erno.de, N5EM@aol.com, larsennc@alaska.net (Nancy-KL7NY/Jim-AL7FS/Juliann-WL7MP), "Jerry L. Bartachek" , "Alvin G. Gann" , Peter Zenker <100743.3320@CompuServe.COM>, Wolfgang Schwarz <101511.61@CompuServe.COM>, Jerry KD0CA , jim_kc1fb@usa.pipeline.com (Jim Francoeur KC1FB), DYARNES@aol.com, tavan@tibco.com, "Bob Barry" , dgf@netcom.com (David Feldman), john andrews , Joel Malman , Dean Marzocca , rwright@soml.com (Robert Wright), Anders Wandahl , , rcmcc@cc.bellcore.com (ronald c mcconnell), , Scott Cranston , William McFadden , "Taylor Greg" , Art Winterbauer , , cookes@pop.jaring.my (Siong Teck Cheun @ Joseph), BERGESON@PPCC.CCCOES.EDU, George Gingell , "Doyle, Ron" , "Gert, SM5LWC" , , John Lockhart , Wayne Glover From: lve1@inel.gov (Larry V East) Subject: QRP+ SSB -- Followup Status: RO I had a couple of responses from folks that said that they had adjusted the IRF510 final bias as per the instructions in the manual: set it so that the current with no (or very little) transmitted output is 60mA higher than the minimum setting. However, they have not looked at the SSB output on a 'scope. Here's the problem: I adjusted the bias on my rig as per the manual instructions (it has the direction of the pot for minimum current backwards, by the way...). I tried to make a couple of contacts on 15M SSB but was told that my audio was severely distorted. I made a check with a local on 75M, and he told me that he didn't think the audio "sounded right" and that my signal seemed pretty broad. I then decided to look at the transmitted signal on my 'scope. The SSB modulation looked horrible! I then fed a two-tone audio signal into the mic input, looked again, and it still looked horrible! Severe negative-going clipping resulting in zero RF output for at least 30% of the time. No wonder there was severe audio distortion and splatter! I then adjusted the bias until I got a decent looking two-tone output on the 'scope -- this required that the idle current be increased to at least 500mA above the minimum setting. Maybe the manual has a misprint, and it should have said 600mA?? I also noted that the positive going peaks were clipped (or limited) at peak power outputs greater than about 3W on the low bands (160-40M) and at less power on the higher bands (about 1.5W on 10M); this could not be eliminated by adjusting the bias. Clipping is pretty severe at 5W output with the two-tone signal. I could also see the clipping on the 'scope when speaking into the mike. By the way -- I have added a pot which allows me to control the ALC level and thus control the SSB power output. Turns out that before I decided to adjust the bias, the no-signal transmitter current was about 850mA. Minimum current is 435mA, so it was running about 415mA above minimum. (That's the way it was set at the factory.) I primarily operate CW, but I had made a few SSB contacts (before deciding to adjust the bias) with no complaints about the audio quality -- although I was only getting about 3W peak output. This past week I borrowed a spectrum analyzer and looked at the SSB output. Adjusting the final bias for minimum "hash" on the spectrum analyzer yielded an idling current of 550mA above the minimum -- again about 10X higher than indicated in the manual. However, the clipping that takes place above 3W peak output did not seem to be causing much in the way of spurious output as far as I could tell from the spectrum analyzer. Saturday afternoon I made two SSB contacts on 17M with the rig. Final bias was set to give an idling current of about 980mA with a supply voltage of 13.1V (normally 13.4V but I get 0.3V drop across the meter). The ALC was set to give a peak output of about 4W -- enough to make the audio peak limiting evident on the scope. Both contacts told me that the audio sounded good; one even said it was "excellent". I also made a check with a local station on 75M, and he also said it sounded good. I would sure like for someone out there to verify my findings. It does not take a fancy spectrum analyzer, just a 'scope that can display the carrier modulation. A simple "monitor scope" should work fine. And if you don't have a two-tone audio generator, just look at the output while talking into the mic. Check the idling current before you start. Then set the bias to the "60mA above minimum" as per the manual and tell me what you see... Thanks and 72, Larry W1HUE/7 PS -- 10M was sure stinko in Idaho for the contest this weekend! From owner-qrp-l@Lehigh.EDU Fri Jan 3 22:52:10 1997 Received: from fidoii.CC.Lehigh.EDU (fidoii.CC.Lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id WAA28611 for ; Fri, 3 Jan 1997 22:52:09 -0500 (EST) X-Received-x: from fidoii.CC.Lehigh.EDU (fidoii.CC.Lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id WAA28611 for ; Fri, 3 Jan 1997 22:52:09 -0500 (EST) Received: from Lehigh.EDU ([127.0.0.1]) by fidoii.cc.lehigh.edu with SMTP id <35045-37453>; Fri, 3 Jan 1997 22:48:48 -0500 Received: from nss2.CC.Lehigh.EDU ([128.180.1.26]) by fidoii.cc.lehigh.edu with ESMTP id <34903-46926>; Fri, 3 Jan 1997 22:47:23 -0500 Received: from islander.whidbey.net (root@islander.whidbey.net [204.57.140.1]) by nss2.CC.Lehigh.EDU (8.8.4/8.8.4) with ESMTP id WAA185110 for ; Fri, 3 Jan 1997 22:47:20 -0500 Received: from psikes.whidbey.net (asn123.whidbey.net [204.57.140.12]) by islander.whidbey.net (8.7.6/8.7.3) with SMTP id TAA13614 for ; Fri, 3 Jan 1997 19:45:36 -0800 (PST) Message-Id: <199701040345.TAA13614@islander.whidbey.net> Date: Fri, 3 Jan 1997 19:47:31 -8 Reply-To: psikes@whidbey.net Sender: owner-qrp-l@Lehigh.EDU Precedence: bulk From: "Phil Sikes" To: "Low Power Amateur Radio Discussion" Subject: QRP+ Questions X-mailer: Pegasus Mail for Win32 (v2.42a) X-Listprocessor-Version: 8.0 -- ListProcessor(tm) by CREN Status: RO Hello to the group and Happy New Year! With the salutations out of the way I have a couple of questions concerning the QRP+. I have the original version and everytime I turn it on the filter default is for SSB operation. Is this normal? I have tried saving a frequency to memory with the scaf set to CW mode, but it still comes back on in SSB mode. Any ideas? Second question concerns the HM70 handmike that was suggested for use with the rig. Does it need to be re-wired for the QRP+, or can I just plug it in and go when it gets here? I do love the little rig, made a SSB contact to my brother AB5UA down in Oklahoma land from up here in Washington (the wet state) on 15 meters the other day. Ain't life and QRP just a hoot!! 72 - Phil Phil Sikes - KJ7NS ARCI #9196 - QRP-L #528 FISTS #2602 - NW QRP #412 From owner-qrp-l@Lehigh.EDU Sat Jan 4 02:29:41 1997 Received: from fidoii.CC.Lehigh.EDU (fidoii.CC.Lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id CAA03564 for ; Sat, 4 Jan 1997 02:29:40 -0500 (EST) X-Received-x: from fidoii.CC.Lehigh.EDU (fidoii.CC.Lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id CAA03564 for ; Sat, 4 Jan 1997 02:29:40 -0500 (EST) Received: from Lehigh.EDU ([127.0.0.1]) by fidoii.cc.lehigh.edu with SMTP id <35127-29711>; Sat, 4 Jan 1997 02:26:30 -0500 Received: from nss2.CC.Lehigh.EDU ([128.180.1.26]) by fidoii.cc.lehigh.edu with ESMTP id <34894-29711>; Sat, 4 Jan 1997 02:25:49 -0500 Received: from mailhost1.primenet.com (mailhost1.primenet.com [206.165.5.51]) by nss2.CC.Lehigh.EDU (8.8.4/8.8.4) with ESMTP id CAA225368 for ; Sat, 4 Jan 1997 02:25:41 -0500 Received: from primenet.com (vole@usr07.primenet.com [206.165.5.107]) by mailhost1.primenet.com (8.8.3/wjp-h3.00) with ESMTP id AAA03867; Sat, 4 Jan 1997 00:25:40 -0700 (MST) Received: (from vole@localhost) by primenet.com (8.8.3/8.8.3) id AAA09474; Sat, 4 Jan 1997 00:25:40 -0700 (MST) Message-Id: <199701040725.AAA09474@primenet.com> Date: Sat, 4 Jan 1997 00:25:40 -0700 (MST) Reply-To: vole@primenet.com Sender: owner-qrp-l@Lehigh.EDU Precedence: bulk From: Joe Gervais To: "Low Power Amateur Radio Discussion" Subject: Re: QRP+ Questions X-To: psikes@whidbey.net X-Cc: qrp-l@Lehigh.EDU X-Listprocessor-Version: 8.0 -- ListProcessor(tm) by CREN Status: RO Howdy Phil, > With the salutations out of the way I have a couple of questions > concerning the QRP+. I have the original version and everytime I turn > it on the filter default is for SSB operation. Is this normal? I have You need the EPROM update from Index Labs. Costs $5-10 and you can install it yourself (a little tricky with all the "sandwich" boards in there - but instructions are good). This will also improve the built-in keyer performance. Great little rig, ain't it? Love mine to pieces! Cheers de KC7NEV, -Joe, vole@primenet.com, AZ ScQRPions (Phoenix) From owner-qrp-l@Lehigh.EDU Sat Jan 11 15:44:12 1997 Received: from fidoii.CC.Lehigh.EDU (fidoii.CC.Lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id PAA22481 for ; Sat, 11 Jan 1997 15:44:11 -0500 (EST) X-Received-x: from fidoii.CC.Lehigh.EDU (fidoii.CC.Lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id PAA22481 for ; Sat, 11 Jan 1997 15:44:11 -0500 (EST) Received: from Lehigh.EDU ([127.0.0.1]) by fidoii.cc.lehigh.edu with SMTP id <35256-24105>; Sat, 11 Jan 1997 15:43:52 -0500 Received: from nss2.CC.Lehigh.EDU ([128.180.1.26]) by fidoii.cc.lehigh.edu with ESMTP id <34887-24105>; Sat, 11 Jan 1997 15:43:11 -0500 Received: from hugin.oden.se (root@hugin.oden.se [193.45.240.2]) by nss2.CC.Lehigh.EDU (8.8.4/8.8.4) with ESMTP id PAA34194 for ; Sat, 11 Jan 1997 15:43:03 -0500 Received: from dialup24-hugin.oden.se (dialup24-hugin.oden.se [193.45.240.34]) by hugin.oden.se (8.8.4/8.8.4) with SMTP id VAA13866 for ; Sat, 11 Jan 1997 21:41:46 +0100 Message-Id: <32D87A40.31B@oden.se> Date: Sat, 11 Jan 1997 21:44:32 -0800 Reply-To: eskola@oden.se Sender: owner-qrp-l@Lehigh.EDU Precedence: bulk From: Harri Ranta-Eskola To: "Low Power Amateur Radio Discussion" Subject: QRP+ avc/SCAF MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-Mailer: Mozilla 3.01 (Win95; I; 16bit) X-Listprocessor-Version: 8.0 -- ListProcessor(tm) by CREN Status: RO I got just some days ago a new QRP+ and it is really impressive rig and nice to work with. Have done already many countires with it. However, I have noticed that the AVC function could be better when using the SCAF filter and some strong station is just near by. The RX`s AVC starts to jump (I do not know if that is the right word but hope you understand me)in the rythm of the strong station and make it difficult to read a weak station with SCAF filter. I have noticed that in such a circumstances it is even better not to use the SCAF but rather trust on the filter in your ears. Does anybody know if that behaviour could be modified in QRP+ or what could I do to improve the rig in this regard???? Your kind help would be appreciated. 73 de SM5USK/Harri From owner-qrp-l@Lehigh.EDU Sun Jan 12 01:38:43 1997 Received: from fidoii.CC.Lehigh.EDU (fidoii.CC.Lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id BAA07915 for ; Sun, 12 Jan 1997 01:38:42 -0500 (EST) X-Received-x: from fidoii.CC.Lehigh.EDU (fidoii.CC.Lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id BAA07915 for ; Sun, 12 Jan 1997 01:38:42 -0500 (EST) Received: from Lehigh.EDU ([127.0.0.1]) by fidoii.cc.lehigh.edu with SMTP id <35181-23247>; Sun, 12 Jan 1997 01:35:29 -0500 Received: from nss2.CC.Lehigh.EDU ([128.180.1.26]) by fidoii.cc.lehigh.edu with ESMTP id <34847-22226>; Sun, 12 Jan 1997 01:34:39 -0500 Received: from motgate2.mot.com (motgate2.mot.com [129.188.136.20]) by nss2.CC.Lehigh.EDU (8.8.4/8.8.4) with ESMTP id BAA29811 for ; Sun, 12 Jan 1997 01:34:29 -0500 Received: from pobox.mot.com (pobox.mot.com [129.188.137.100]) by motgate2.mot.com (8.7.6/8.6.10/MOT-3.8) with ESMTP id AAA18657; Sun, 12 Jan 1997 00:28:31 -0600 (CST) Received: from azbx.mot.com (azbx.mot.com [129.188.127.40]) by pobox.mot.com (8.7.6/8.6.10/MOT-3.8) with SMTP id AAA14769; Sun, 12 Jan 1997 00:34:22 -0600 (CST) Received: by azbx.mot.com (1.38.193.5/16.2) id AA29945; Sun, 12 Jan 1997 00:34:20 -0600 Message-Id: Date: Sat, 11 Jan 1997 22:18:00 -0600 Reply-To: Bob_Tellefsen-CNSE97@email.mot.com Sender: owner-qrp-l@Lehigh.EDU Precedence: bulk From: "Bob Tellefsen-CNSE97" To: "Low Power Amateur Radio Discussion" Subject: QRP+ X-To: eskola@oden.se X-Cc: qrp-l@Lehigh.EDU X-Mailer: Worldtalk (4.0.2-p15)/STREAM X-Listprocessor-Version: 8.0 -- ListProcessor(tm) by CREN Status: RO Harri SM5USK: I too have a QRP+. Mine was the original version, then had it upgraded. The best fix I've seen for the trouble you describe is to install an RF gain control. I mounted a small box on top of the QRP+ and put several potentiometers in it. One is RF gain control and one is for a noise blanker I haven't built yet. The IF amplifier circuit inside is very conventional. You can find the circuit in almost any receiver circuit book. Just add the control with a decoupling diode, so that when you have the RF gain wide open, the AGC will function. As you reduce the gain more and more, eventually there won't be enough signal coming through to activate the AGC. That's where I run it most of the time, with nearly maximum audio gain. Sure makes a big difference for me. Hope this helps you. 73, Bob N6WG From owner-qrp-l@Lehigh.EDU Sun Jan 12 11:55:23 1997 Received: from fidoii.CC.Lehigh.EDU (fidoii.CC.Lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id LAA02331 for ; Sun, 12 Jan 1997 11:55:22 -0500 (EST) X-Received-x: from fidoii.CC.Lehigh.EDU (fidoii.CC.Lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id LAA02331 for ; Sun, 12 Jan 1997 11:55:22 -0500 (EST) Received: from Lehigh.EDU ([127.0.0.1]) by fidoii.cc.lehigh.edu with SMTP id <35101-23247>; Sun, 12 Jan 1997 11:54:35 -0500 Received: from nss2.CC.Lehigh.EDU ([128.180.1.26]) by fidoii.cc.lehigh.edu with ESMTP id <35258-35025>; Sun, 12 Jan 1997 11:51:17 -0500 Received: from nccn.net (nccn1.nccn.net [205.139.74.2]) by nss2.CC.Lehigh.EDU (8.8.4/8.8.4) with ESMTP id LAA45333 for ; Sun, 12 Jan 1997 11:50:57 -0500 Received: from [205.139.74.163] (ppp163.nccn.net [205.139.74.163]) by nccn.net (8.8.3/8.7.3) with SMTP id IAA10648 for ; Sun, 12 Jan 1997 08:51:33 -0800 (PST) Message-Id: Date: Sun, 12 Jan 1997 08:56:55 -0800 Reply-To: wylde@nccn.net Sender: owner-qrp-l@Lehigh.EDU Precedence: bulk From: wylde@nccn.net (Grover, K7TP) To: "Low Power Amateur Radio Discussion" Subject: QRP+ RF Gain Control Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" X-Listprocessor-Version: 8.0 -- ListProcessor(tm) by CREN Status: RO Has nayone found a source for concentric controls to add an rf gain pot in the location of the audio gain pot? Grover K7TP From owner-qrp-l@Lehigh.EDU Tue Jan 14 07:33:54 1997 Received: from fidoii.CC.Lehigh.EDU (fidoii.CC.Lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id HAA11988 for ; Tue, 14 Jan 1997 07:33:53 -0500 (EST) X-Received-x: from fidoii.CC.Lehigh.EDU (fidoii.CC.Lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id HAA11988 for ; Tue, 14 Jan 1997 07:33:53 -0500 (EST) Received: from Lehigh.EDU ([127.0.0.1]) by fidoii.cc.lehigh.edu with SMTP id <35021-11531>; Tue, 14 Jan 1997 07:32:32 -0500 Received: from nss2.CC.Lehigh.EDU ([128.180.1.26]) by fidoii.cc.lehigh.edu with ESMTP id <34896-24584>; Tue, 14 Jan 1997 07:31:33 -0500 Received: from comm1.ab.umd.edu (comm1.ab.umd.edu [134.192.1.5]) by nss2.CC.Lehigh.EDU (8.8.4/8.8.4) with ESMTP id HAA34482 for ; Tue, 14 Jan 1997 07:31:28 -0500 Received: from dental3.ab.umd.edu (dental3.ab.umd.edu [134.192.84.10]) by comm1.ab.umd.edu (8.7.3/8.7.3) with ESMTP id HAA01404 for ; Tue, 14 Jan 1997 07:31:27 -0500 (EST) Received: from DENTAL_1/MAILQUEUE by dental3.ab.umd.edu (Mercury 1.21); 14 Jan 97 07:31:35 -5 Received: from MAILQUEUE by DENTAL_1 (Mercury 1.21); 14 Jan 97 07:31:14 -5 Message-Id: <186B9F1B0B@dental3.ab.umd.edu> Date: Tue, 14 Jan 1997 07:31:09 EST Reply-To: JFM001@DENTAL3.AB.UMD.EDU Sender: owner-qrp-l@Lehigh.EDU Precedence: bulk From: "JOHN F. McCLUN" To: "Low Power Amateur Radio Discussion" Subject: RE: QRP+ RF gain control X-mailer: WinPMail v1.0 (R2) X-Listprocessor-Version: 8.0 -- ListProcessor(tm) by CREN Status: RO Gang - Thanks to those who replied about the rf gain setup. I was able to find a concentric rf/af pot and have it installed. Find that it works OK but I don't really use it that much. The DSP does everything with out use the gain control to try and eliminate conflicting stations. Thanks again - for those who need a control I will post in the next week where to obtain it. 72 & 73 John N3REY Always QRP! From owner-qrp-l@Lehigh.EDU Tue Jan 14 09:17:54 1997 Received: from fidoii.CC.Lehigh.EDU (fidoii.CC.Lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id JAA15204 for ; Tue, 14 Jan 1997 09:17:53 -0500 (EST) X-Received-x: from fidoii.CC.Lehigh.EDU (fidoii.CC.Lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id JAA15204 for ; Tue, 14 Jan 1997 09:17:53 -0500 (EST) Received: from Lehigh.EDU ([127.0.0.1]) by fidoii.cc.lehigh.edu with SMTP id <35190-24584>; Tue, 14 Jan 1997 09:17:01 -0500 Received: from nss2.CC.Lehigh.EDU ([128.180.1.26]) by fidoii.cc.lehigh.edu with ESMTP id <35027-24584>; Tue, 14 Jan 1997 09:15:45 -0500 Received: from motgate2.mot.com (motgate2.mot.com [129.188.136.20]) by nss2.CC.Lehigh.EDU (8.8.4/8.8.4) with ESMTP id JAA35581 for ; Tue, 14 Jan 1997 09:15:40 -0500 Received: from mothost.mot.com (mothost.mot.com [129.188.137.101]) by motgate2.mot.com (8.7.6/8.6.10/MOT-3.8) with ESMTP id IAA22066 for ; Tue, 14 Jan 1997 08:07:57 -0600 (CST) Received: from azbx.mot.com (azbx.mot.com [129.188.127.40]) by mothost.mot.com (8.7.6/8.6.10/MOT-3.8) with SMTP id IAA16855 for ; Tue, 14 Jan 1997 08:13:51 -0600 (CST) Received: by azbx.mot.com (1.38.193.5/16.2) id AA05106; Tue, 14 Jan 1997 08:13:49 -0600 Message-Id: Date: Mon, 13 Jan 1997 19:46:00 -0600 Reply-To: Bob_Tellefsen-CNSE97@email.mot.com Sender: owner-qrp-l@Lehigh.EDU Precedence: bulk From: "Bob Tellefsen-CNSE97" To: "Low Power Amateur Radio Discussion" Subject: Re:QRP+ RF Gain Control X-Mailer: Worldtalk (4.0.2-p15)/STREAM X-Listprocessor-Version: 8.0 -- ListProcessor(tm) by CREN Status: RO Grover, K7TP: Bruce Franklin, the designer of the QRP+, couldn't find a decent source of a dual concentric shaft pot. I imagine he has better resources as a manufacturer than we do, except in our scroungings at flea markets. That's about the only place I see that type of pot anymore. I had to resort to a separate pot for my RF gain control. 72, Bob N6WG From lve1@inel.gov Fri Jan 17 11:10:41 1997 Received: from eloi.inel.gov (eloi.INEL.GOV [134.20.173.29]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id LAA27593 for ; Fri, 17 Jan 1997 11:10:38 -0500 (EST) X-Received-x: from eloi.inel.gov (eloi.INEL.GOV [134.20.173.29]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id LAA27593 for ; Fri, 17 Jan 1997 11:10:38 -0500 (EST) Received: from pc-lve1 ([134.20.176.115]) by eloi.inel.gov (post.office MTA v2.0 0813 ID# 0-12374) with SMTP id AAA10532; Fri, 17 Jan 1997 09:09:17 -0700 Message-Id: <2.2.16.19970117160652.1897785e@eloi> X-Sender: lve1@eloi X-Mailer: Windows Eudora Pro Version 2.2 (16) Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Date: Fri, 17 Jan 1997 09:06:52 -0700 To: pepperb@gov.on.ca, Charlie Lofgren , bkassel@enet.net (Brian Kassel), Paul Erickson , Mike Rioux , John Dundas , af852@rgfn.epcc.Edu (William R Colbert), Bob_Tellefsen-CNSE97@email.mot.com, Christoph Zehntner , GREGOIRE@ENDOR.COM (ERNEST GREGOIRE), jdorson@bbs.mpcs.com (John Dorson), "GaryNye" , Bill Acito , "Mark B. Peterson" <70233.1106@CompuServe.COM>, bfollett@ditell.com, bcutter@teal.csn.net (Bob Cutter), john@antenna.demon.co.uk, "Francis A. McCrackin" , "Richard Hieber" , "JOHN F. McCLUN" , MCDANIELD@ouvaxa.cats.ohiou.edu, Norbert.Heyder@erno.de, N5EM@aol.com, larsennc@alaska.net (Nancy-KL7NY/Jim-AL7FS/Juliann-WL7MP), "Jerry L. Bartachek" , "Alvin G. Gann" , Peter Zenker <100743.3320@CompuServe.COM>, Wolfgang Schwarz <101511.61@CompuServe.COM>, Jerry KD0CA , jim_kc1fb@usa.pipeline.com (Jim Francoeur KC1FB), DYARNES@aol.com, tavan@tibco.com, "Bob Barry" , dgf@netcom.com (David Feldman), john andrews , Joel Malman , Dean Marzocca , rwright@soml.com (Robert Wright), Anders Wandahl , , rcmcc@cc.bellcore.com (ronald c mcconnell), , Scott Cranston , William McFadden , "Taylor Greg" , Art Winterbauer , , cookes@pop.jaring.my (Siong Teck Cheun @ Joseph), BERGESON@PPCC.CCCOES.EDU, George Gingell , "Doyle, Ron" , "Gert, SM5LWC" , , John Lockhart , Wayne Glover From: lve1@inel.gov (Larry V East) Subject: QRP+ and SSB Status: RO The following was received from Peter Zenker, DL2FI, in response to my request for information concerning the IRF510 bias setting in the QRP+: >Larry, thank you for mailing your comments about SSB. >Ive been very busy in QRL so that I could not answer your request before. > >My answer to your questions: >When I did the first review on QRP+ Serial number 253 abt two years ago, I found >that the SSB quality was very poor. When I measured what happens at the balance >modulator, I found out, that the ALC shortened in SSB the DSB signal to a level >of abt some 50 mV, in CW the level was abtout 3 to 4 times more. The ALC did a >kind of clipping. I introduced a pot to adjust the ALC level. >Allthough I now could ajust the ALC, the SSB signal stayed bad. Other OMs sayed, >my signal sound is like an AURORA signal :-(( > >Next try was to optimize the output transformer. Things have gone little better >with a two hole transformer but still bad. Next I tried some experiments with >the "standing current" (I know, that a MOS is voltage driven, but its easier to >diskuss it in terms of better known standing current as a result of the gate >voltage) What I found out was, that it was absolute impossible to have linear >amplifier in mode AB with the IRF at 12 Volt. If using more then 18 Volt it was >no problem, to run AB (low standing current" and amplifying linear. At 12 Volt >the only way was to run the IRF total in A Mode, that means at least 800 mA with >now signals. The best results at 12Volts I had at total curent of about 1A with >no signal. >At this rates the SSB signal is absolute linear, poor (low) distortions and also the >reports of critical friends are excellent. > >By the way: the IRF runs very, very hot in this mode!!!!! > >I verified this expierience in the meantime with 3 or 4 different QRP+ >serialnumbers 500 (My own one) and up to 1200something. Some other QRP+ users in >Berlin did the same test (most of them without modified ALC) aand hat the same >results. Last year we measured the Current of very fresh delivered QRP+ (pull >out the fuse and use a mAMeter iinstead of the fuse for a fast overview) >All !! of this QRP+ showed currents between 800mA and 1200 mA original as from >the factory. > >Thats a big mystery araound QRP+ and SSB. > >This problem is not a Problem for me, because I am a CW only op. But some of my >friends like to do SSB to. Most of them modified the QRP+ to run the IRF with >more than 12 Volt. Some of them with 2*12V batterie and some with a step up >Voltage doubler. These 24V driven QRP+ are very well in SSB and also very >stable. > Some additional information received in a follow-up note: >>I would be very interested in the voltage doubler circuit -- it this >>something that can be built into the QRP+, or is it external? Has >>information been published on it? >No, we built it outside the QRP plus. My QRP+ is housed in a aluminium box with >a build in 7Ah Akku, Matchbox and so on ( My "Shack in the box" :-)) ) >I opened the +12V for the IRF, put a new plugin at the back side. For normal CW >use there is a switch at the backside to, that puts the 12V back to the IRV + >line, for SSB I can use the second plugin with a 20-28V Source. I use a step up >converter, which I got as a kit from a ham friend, but some others use 2 12V >akku in line or different step up convertres. Most are based on one of this MAX >chips. It should give you between 20 and 28 V at 1 Ampere minimum. Some Others >use a commercial 12 to 24 V supply, we can buy here at a local electronic shop. > So... confirmation that the bias setting instructions in the QRP+/QRP++ manual are INCORRECT! If you adjust the idling current for an increase above minimum of only 60mA, you will have a very poor sounding SSB signal! If you adjust it for an increase of 600mA, it should be pretty close to the optimum value. If you change the bias setting from its factory setting, I strongly recommend that you check the SSB output signal on a 'scope. 72, Larry W1HUE/7 w1hue@amsat.org PS -- Check the January issue if the ARCI QRP Quarterly for my write-up on receiver mods for the QRP+. I think all but one of those mods have been posted to this list. From owner-qrp-l@Lehigh.EDU Fri Jan 17 15:58:43 1997 Received: from fidoii.CC.Lehigh.EDU (fidoii.CC.Lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id PAA02961 for ; Fri, 17 Jan 1997 15:58:42 -0500 (EST) X-Received-x: from fidoii.CC.Lehigh.EDU (fidoii.CC.Lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id PAA02961 for ; Fri, 17 Jan 1997 15:58:42 -0500 (EST) Received: from Lehigh.EDU ([127.0.0.1]) by fidoii.cc.lehigh.edu with SMTP id <35085-34627>; Fri, 17 Jan 1997 15:49:47 -0500 Received: from nss2.CC.Lehigh.EDU ([128.180.1.26]) by fidoii.cc.lehigh.edu with ESMTP id <35026-52036>; Fri, 17 Jan 1997 15:48:58 -0500 Received: from OBIWAN.ENDOR.COM (BABIARZ@obiwan.endor.com [199.103.183.1]) by nss2.CC.Lehigh.EDU (8.8.4/8.8.4) with SMTP id PAA54848 for ; Fri, 17 Jan 1997 15:48:46 -0500 Received: from Gregoire.endor.com [199.103.183.143] by OBIWAN.ENDOR.COM with SMTP-OpenVMS via TCP/IP; Fri, 17 Jan 1997 15:50 EDT Message-Id: <199701172048.PAA54848@nss2.CC.Lehigh.EDU> Date: Fri, 17 Jan 1997 15:48:46 -0500 Reply-To: GREGOIRE@ENDOR.COM Sender: owner-qrp-l@Lehigh.EDU Precedence: bulk From: GREGOIRE@ENDOR.COM (ERNEST GREGOIRE) To: "Low Power Amateur Radio Discussion" Subject: ICOM SURPLUS MIC./QRP++ Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" X-Sender: GREGOIRE@ENDOR.COM X-Mailer: X-Listprocessor-Version: 8.0 -- ListProcessor(tm) by CREN Status: RO Hello Gang, I learned about the surplus microphones from Bruce Franklin at Index Labs,and I believe the idea has been kicked around here too. I just had a nice QSO with a VE2,oddly enough he was testing a new mic. too. He has a Heil mic. and was running 50 watts. I was using the QRP++ at 5-6 watts. The Icom HM-70, drives the rig better than the QSK mic. that came with the radio. The audio report was very good. I'm happy with the mic. It has an angle plug on it making it ideal for the rear mic. jack on the QRP++. It has a much longer cord too. The voice peaks just as well at 8 to 10 inches from my mouth as right in front of my lips. It worked right out of the box, with no wiring changes. It sure is nice to have a spare mic. too. BTW the mic. cost was $28.00 and Icom says they have 100 left. And when they are gone, then they are all gone. The web site has all the info you need for ordering. Just look in QST for an Icom ad., the site will be listed there. 73 de AA1IK Ernie From w1hue@amsat.org Mon Feb 3 19:03:23 1997 Received: from eloi.inel.gov (eloi.INEL.GOV [134.20.173.29]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id TAA21030 for ; Mon, 3 Feb 1997 19:03:21 -0500 (EST) X-Received-x: from eloi.inel.gov (eloi.INEL.GOV [134.20.173.29]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id TAA21030 for ; Mon, 3 Feb 1997 19:03:21 -0500 (EST) Received: from pc-lve1 ([134.20.176.115]) by eloi.inel.gov (post.office MTA v2.0 0813 ID# 0-12374) with SMTP id AAA20114; Mon, 3 Feb 1997 17:03:31 -0700 Message-Id: <2.2.16.19970203235811.284786b6@eloi> X-Sender: lve1@eloi X-Mailer: Windows Eudora Pro Version 2.2 (16) Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Date: Mon, 03 Feb 1997 16:58:11 -0700 To: pepperb@gov.on.ca, Charlie Lofgren , bkassel@enet.net (Brian Kassel), Paul Erickson , Mike Rioux , John Dundas , af852@rgfn.epcc.Edu (William R Colbert), Bob_Tellefsen-CNSE97@email.mot.com, Christoph Zehntner , GREGOIRE@ENDOR.COM (ERNEST GREGOIRE), jdorson@bbs.mpcs.com (John Dorson), "GaryNye" , Bill Acito , "Mark B. Peterson" <70233.1106@CompuServe.COM>, bfollett@ditell.com, bcutter@teal.csn.net (Bob Cutter), john@antenna.demon.co.uk, "Francis A. McCrackin" , "Richard Hieber" , "JOHN F. McCLUN" , MCDANIELD@ouvaxa.cats.ohiou.edu, norbert.heyder@ri.dasa.de, N5EM@aol.com, larsennc@alaska.net (Nancy-KL7NY/Jim-AL7FS/Juliann-WL7MP), "Jerry L. Bartachek" , "Alvin G. Gann" , Peter Zenker <100743.3320@CompuServe.COM>, Wolfgang Schwarz <101511.61@CompuServe.COM>, Jerry KD0CA , jim_kc1fb@usa.pipeline.com (Jim Francoeur KC1FB), DYARNES@aol.com, tavan@tibco.com, "Bob Barry" , dgf@netcom.com (David Feldman), john andrews , Joel Malman , Dean Marzocca , rwright@soml.com (Robert Wright), Anders Wandahl , , , Scott Cranston , William McFadden , "Taylor Greg" , Art Winterbauer , , cookes@pop.jaring.my (Siong Teck Cheun @ Joseph), BERGESON@PPCC.CCCOES.EDU, George Gingell , "Doyle, Ron" , "Gert, SM5LWC" , , John Lockhart , Wayne Glover , DL3HQN@t-online.de (Ingolf Petzold) From: Larry East Subject: New Final FET for QRP+ Status: RO Well, gang, I think I have solved the linearity problem in my QRP+ and the consequent low SSB output power: I replaced the IRF510 final with an MTP3055E along with a new 12:1 output transformer and some negative feedback. I also made some changes to the ALC circuit. The net result is that I can now get a good solid 5W of SSB out on all bands (actually, I can get at least 8W on 160 through 40M) with no signs of distortion. The MTP3055E also operates with a more reasonable idling current of 150 to 200 mA (500 mA or more is required with the IRF510). Still making measurements -- hopefully I'll get finished in time to include this mod in my "QRP+ Mods Part II" article scheduled for the April issue of The QRP Quarterly. In case you haven't noticed, the QRP+ (and, I assume, the QRP++) SSB output starts to limit above about 3W on the low bands, and at about 1.5W on 10M. It CAN be pushed to 5W out on 40M and below (about 4W on 20/15), but operation in this range is anything but linear. However, the output still sounds reasonably good even though definite voice peak limiting can be seen on a 'scope. For it to operate at all on SSB, an idling current of at least 500mA is required, rather than the 60mA claimed in the manual. (Maybe that should read 600mA; I asked Bruce Franklin about this over three months ago but have received no response from him). Rumor has it that Index is working on a "new improved" rig for introduction at Dayton. Wonder what this one will be like... _________________________________________________________ "Any opinions expressed herein are my own and probably do not agree with those of my employer, the U.S. Government or my spouse" --... ...-- Larry V. East (W1HUE) Idaho Falls, ID e-mail: w1hue@amsat.org work: (208) 526-0081 home: (208) 529-2162 From w1hue@amsat.org Wed Feb 5 11:35:36 1997 Received: from eloi.inel.gov (eloi.INEL.GOV [134.20.173.29]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id LAA29019 for ; Wed, 5 Feb 1997 11:35:33 -0500 (EST) X-Received-x: from eloi.inel.gov (eloi.INEL.GOV [134.20.173.29]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id LAA29019 for ; Wed, 5 Feb 1997 11:35:33 -0500 (EST) Received: from pc-lve1 ([134.20.176.115]) by eloi.inel.gov (post.office MTA v2.0 0813 ID# 0-12374) with SMTP id AAA19607; Wed, 5 Feb 1997 09:35:47 -0700 Message-Id: <2.2.16.19970205163014.271f2f88@eloi> X-Sender: lve1@eloi X-Mailer: Windows Eudora Pro Version 2.2 (16) Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Date: Wed, 05 Feb 1997 09:30:14 -0700 To: pepperb@gov.on.ca, Charlie Lofgren , bkassel@enet.net (Brian Kassel), Paul Erickson , Mike Rioux , John Dundas , af852@rgfn.epcc.Edu (William R Colbert), Bob_Tellefsen-CNSE97@email.mot.com, Christoph Zehntner , GREGOIRE@ENDOR.COM (ERNEST GREGOIRE), jdorson@bbs.mpcs.com (John Dorson), "GaryNye" , Bill Acito , "Mark B. Peterson" <70233.1106@CompuServe.COM>, bfollett@ditell.com, bcutter@teal.csn.net (Bob Cutter), john@antenna.demon.co.uk, "Francis A. McCrackin" , "Richard Hieber" , "JOHN F. McCLUN" , MCDANIELD@ouvaxa.cats.ohiou.edu, norbert.heyder@ri.dasa.de, N5EM@aol.com, larsennc@alaska.net (Nancy-KL7NY/Jim-AL7FS/Juliann-WL7MP), "Jerry L. Bartachek" , "Alvin G. Gann" , Peter Zenker <100743.3320@CompuServe.COM>, Wolfgang Schwarz <101511.61@CompuServe.COM>, Jerry KD0CA , jim_kc1fb@usa.pipeline.com (Jim Francoeur KC1FB), DYARNES@aol.com, tavan@tibco.com, "Bob Barry" , dgf@netcom.com (David Feldman), john andrews , Joel Malman , Dean Marzocca , rwright@soml.com (Robert Wright), Anders Wandahl , , , Scott Cranston , William McFadden , "Taylor Greg" , Art Winterbauer , , cookes@pop.jaring.my (Siong Teck Cheun @ Joseph), BERGESON@PPCC.CCCOES.EDU, George Gingell , "Doyle, Ron" , "Gert, SM5LWC" , , John Lockhart , Wayne Glover , DL3HQN@t-online.de (Ingolf Petzold) From: Larry East Subject: New QRP+ Final -- More Status: RO I made some on the air SSB tests last night using the new PA I mentioned in a previous message. A local ham told me that I had the best sounding audio he had ever heard from a QRP PLUS. Made my day! :-) Works great on CW also -- at least 5W out (using a power supply that puts out at least 13V) on all bands and can be reduced to less than 100mW with the standard CW power control. I can now get 5W out on 40M using my 12V battery whereas I was only getting between 3 and 4W with the stock final (battery output drops to 11.8V under load -- suspect there's a little resistance in the cable or connector). 9W out on 40M from a 13.6V supply. Will get details written up and posted as soon as I get "a round toit"... :-) 72, Larry W1HUE/7 From w1hue@amsat.org Mon Feb 10 11:49:28 1997 Received: from eloi.inel.gov (eloi.INEL.GOV [134.20.173.29]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id LAA08571 for ; Mon, 10 Feb 1997 11:49:26 -0500 (EST) X-Received-x: from eloi.inel.gov (eloi.INEL.GOV [134.20.173.29]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id LAA08571 for ; Mon, 10 Feb 1997 11:49:26 -0500 (EST) Received: from pc-lve1 ([134.20.176.115]) by eloi.inel.gov (post.office MTA v2.0 0813 ID# 0-12374) with SMTP id AAA7208; Mon, 10 Feb 1997 09:49:34 -0700 Message-Id: <2.2.16.19970210164909.2727870a@eloi> X-Sender: lve1@eloi X-Mailer: Windows Eudora Pro Version 2.2 (16) Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Date: Mon, 10 Feb 1997 09:49:09 -0700 To: pepperb@gov.on.ca, Charlie Lofgren , bkassel@enet.net (Brian Kassel), Paul Erickson , Mike Rioux , John Dundas , af852@rgfn.epcc.Edu (William R Colbert), Bob_Tellefsen-CNSE97@email.mot.com, Christoph Zehntner HB9AJP , GREGOIRE@ENDOR.COM (ERNEST GREGOIRE), jdorson@bbs.mpcs.com (John Dorson), "GaryNye" , Bill Acito , "Mark B. Peterson" <70233.1106@CompuServe.COM>, bfollett@ditell.com, bcutter@teal.csn.net (Bob Cutter), john@antenna.demon.co.uk, "Francis A. McCrackin" , "Richard Hieber" , "JOHN F. McCLUN" , MCDANIELD@ouvaxa.cats.ohiou.edu, norbert.heyder@ri.dasa.de, N5EM@aol.com, larsennc@alaska.net (Nancy-KL7NY/Jim-AL7FS/Juliann-WL7MP), "Jerry L. Bartachek" , "Alvin G. Gann" , Peter Zenker <100743.3320@CompuServe.COM>, Wolfgang Schwarz <101511.61@CompuServe.COM>, Jerry KD0CA , jim_kc1fb@usa.pipeline.com (Jim Francoeur KC1FB), DYARNES@aol.com, "Bob Barry" , dgf@netcom.com (David Feldman), john andrews , Joel Malman , Dean Marzocca , rwright@soml.com (Robert Wright), Anders Wandahl , , , Scott Cranston , William McFadden , "Taylor Greg" , Art Winterbauer , , cookes@pop.jaring.my (Siong Teck Cheun @ Joseph), BERGESON@PPCC.CCCOES.EDU, George Gingell , "Doyle, Ron" , "Gert, SM5LWC" , , John Lockhart , Wayne Glover , DL3HQN@t-online.de (Ingolf Petzold) From: Larry East Subject: QRP+ RTTY Status: RO Please respond directly to Scott rather than to me -- unless you want your reply to go to the entire QRP+ mailing list. >Return-Path: >Date: Mon, 10 Feb 1997 11:09:29 -0500 >From: Scott Cranston >To: w1hue@amsat.org >Subject: RTTY question or QRP+ list >Cc: cranston@zk3.dec.com > >Hi Larry > >Can you forward this to your QRP+ email list.... > > >I have a QRP++ and I am interested in running RTTY and SSTV on it. > >I have the recomended way from Index labs to connect AFSK tones and PTT to >the QRP++ mic connector. > >I'd like to hear from other QRP++ owners that are are doing RTTY and/or SSTV >and hear how they have interfaced to/from the radio and the success they >are having. > >I have an old email message that suggests that the QRP++ passband won't >handle the high range of tones needed for RTTY... and if true it surely >won't handle SSTV. Any truth to the narrow xmit/receive passband??? > > >Thanks, >Scott cranston@zk3.dec.com >KB1NW > From GREGOIRE@endor.com Tue Feb 11 11:39:12 1997 Received: from OBIWAN.ENDOR.COM (BABIARZ@obiwan.endor.com [199.103.183.1]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with SMTP id LAA11320 for ; Tue, 11 Feb 1997 11:39:09 -0500 (EST) X-Received-x: from OBIWAN.ENDOR.COM (BABIARZ@obiwan.endor.com [199.103.183.1]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with SMTP id LAA11320 for ; Tue, 11 Feb 1997 11:39:09 -0500 (EST) From: GREGOIRE@endor.com Received: from Gregoire.endor.com [199.103.183.143] by OBIWAN.ENDOR.COM with SMTP-OpenVMS via TCP/IP; Tue, 11 Feb 1997 11:36 EDT Date: Tue, 11 Feb 97 11:26:22 PST Subject: RE: QRP+ RTTY To: pepperb@gov.on.ca, Charlie Lofgren , Brian Kassel , Paul Erickson , Mike Rioux , John Dundas , William R Colbert , Bob_Tellefsen-CNSE97@email.mot.com, Christoph Zehntner HB9AJP , ERNEST GREGOIRE , John Dorson , GaryNye , Bill Acito , "Mark B. Peterson" <70233.1106@CompuServe.COM>, bfollett@ditell.com, Bob Cutter , john@antenna.demon.co.uk, "Francis A. McCrackin" , Richard Hieber , "JOHN F. McCLUN" , MCDANIELD@ouvaxa.cats.ohiou.edu, norbert.heyder@ri.dasa.de, N5EM@aol.com, Nancy-KL7NY/Jim-AL7FS/Juliann-WL7MP , "Jerry L. Bartachek" , "Alvin G. Gann" , Peter Zenker <100743.3320@CompuServe.COM>, Wolfgang Schwarz <101511.61@CompuServe.COM>, Jerry KD0CA , Jim Francoeur KC1FB , DYARNES@aol.com, Bob Barry , David Feldman , john andrews , Joel Malman , Dean Marzocca , Robert Wright , Anders Wandahl , w7ls@brigadoon.com, Peter_Simpson@3mail.3Com.COM, Scott Cranston , William McFadden , Taylor Greg , Art Winterbauer , Mark_E_Gustoff@ccm.ch.intel.com, cookes@pop.jaring.my, BERGESON@PPCC.CCCOES.EDU, George Gingell , "Doyle, Ron" , "Gert, SM5LWC" , KB7ZZ@aol.com, John Lockhart , Wayne Glover , Ingolf Petzold , Larry East X-Mailer: Chameleon V0.05, TCP/IP for Windows, NetManage Inc. Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; CHARSET=us-ascii Status: RO Hello Gang, RTTY is not only possible using the qrp++ but it is a lot of fun too. A problem did arrise using the Kam TNC, the impeadance of the KAM is 600 ohms and the phone jack imp. is 8 ohms. It still worked though, and if I hadn't just aquired a KNWD. 870, I would have built a matching net for it using a audio tranformer. See you on the bands RTTY ME, any time ------------------------------------- de AA1IK, Lead by example. Ernie Gregoire It is better to pull a string, than to push it. R.R. 1, Box 221, South Rd. Fists # 2644, N.E.QRP # 202 Canaan, NH. 03741 QRP-L # 95, Fly fisher & tier, Promise Keeper. E-mail address: gregoire@endor.com packet address: AA1IK@W1WOK.FN43FE.NH.USA.NA ------------------------------------- 02/11/97 11:26:24 From w1hue@amsat.org Fri Feb 21 15:34:03 1997 Received: from eloi.inel.gov (eloi.INEL.GOV [134.20.173.29]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id PAA15113 for ; Fri, 21 Feb 1997 15:33:58 -0500 (EST) X-Received-x: from eloi.inel.gov (eloi.INEL.GOV [134.20.173.29]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id PAA15113 for ; Fri, 21 Feb 1997 15:33:58 -0500 (EST) Received: from pc-lve1 ([134.20.176.115]) by eloi.inel.gov (post.office MTA v2.0 0813 ID# 0-12374) with SMTP id AAA15845; Fri, 21 Feb 1997 13:33:59 -0700 Message-Id: <2.2.16.19970221203141.2b5f519c@eloi> X-Sender: lve1@eloi X-Mailer: Windows Eudora Pro Version 2.2 (16) Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Date: Fri, 21 Feb 1997 13:31:41 -0700 To: pepperb@gov.on.ca, Charlie Lofgren , bkassel@enet.net (Brian Kassel), Paul Erickson , Mike Rioux , John Dundas , af852@rgfn.epcc.Edu (William R Colbert), Bob_Tellefsen-CNSE97@email.mot.com, Christoph Zehntner HB9AJP , GREGOIRE@ENDOR.COM (ERNEST GREGOIRE), jdorson@bbs.mpcs.com (John Dorson), "GaryNye" , Bill Acito , "Mark B. Peterson" <70233.1106@CompuServe.COM>, bfollett@ditell.com, bcutter@teal.csn.net (Bob Cutter), john@antenna.demon.co.uk, "Francis A. McCrackin" , "Richard Hieber" , "JOHN F. McCLUN" , MCDANIELD@ouvaxa.cats.ohiou.edu, norbert.heyder@ri.dasa.de, N5EM@aol.com, larsennc@alaska.net (Nancy-KL7NY/Jim-AL7FS/Juliann-WL7MP), "Jerry L. Bartachek" , "Alvin G. Gann" , Peter Zenker <100743.3320@CompuServe.COM>, Wolfgang Schwarz <101511.61@CompuServe.COM>, Jerry KD0CA , jim_kc1fb@usa.pipeline.com (Jim Francoeur KC1FB), DYARNES@aol.com, "Bob Barry" , dgf@netcom.com (David Feldman), john andrews , Joel Malman , Dean Marzocca , rwright@soml.com (Robert Wright), Anders Wandahl , , , Scott Cranston , William McFadden , "Taylor Greg" , Art Winterbauer , , cookes@pop.jaring.my (Siong Teck Cheun @ Joseph), BERGESON@PPCC.CCCOES.EDU, George Gingell , "Doyle, Ron" , "Gert, SM5LWC" , , John Lockhart , Wayne Glover , DL3HQN@t-online.de (Ingolf Petzold), Barry Keating WD4MSM From: Larry East Subject: QRP PLUS Mods in April QRP Quarterly Status: RO There will be at least two articles in the April 1997 issue of the QRP Quarterly on QRP Plus mods -- including my new final that can put out a full 5W of "clean" SSB. If you aren't an ARCI member -- SHAME ON YOU! It may not be too late to get the April issue if you join now. The membership chairperson is Mike Bryce; I don't happen to have his call or mailing address handy at the moment, but his email address is <73357.222@Compuserve.com>. Dues are $15 domestic (slightly higher for Canada and overseas) plus a $2 "first time fee" for membership certificate, etc. If you need Mike's mailing address and/or the exact non-US membership fees, let me know and I'll get the info to you. _________________________________________________________ "Any opinions expressed herein are my own and probably do not agree with those of my employer, the U.S. Government or my spouse" --... ...-- Larry V. East (W1HUE) Idaho Falls, ID e-mail: w1hue@amsat.org work: (208) 526-0081 home: (208) 529-2162 From owner-qrp-l@Lehigh.EDU Wed Feb 26 08:24:40 1997 Received: from fidoii.CC.Lehigh.EDU (fidoii.CC.Lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id IAA01877 for ; Wed, 26 Feb 1997 08:24:38 -0500 (EST) X-Received-x: from fidoii.CC.Lehigh.EDU (fidoii.CC.Lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id IAA01877 for ; Wed, 26 Feb 1997 08:24:38 -0500 (EST) Received: from Lehigh.EDU ([127.0.0.1]) by fidoii.cc.lehigh.edu with SMTP id <35010-28956>; Wed, 26 Feb 1997 08:23:53 -0500 Received: from nss2.CC.Lehigh.EDU ([128.180.1.26]) by fidoii.cc.lehigh.edu with ESMTP id <35005-17949>; Wed, 26 Feb 1997 08:19:26 -0500 Received: from comm1.ab.umd.edu (comm1.ab.umd.edu [134.192.1.5]) by nss2.CC.Lehigh.EDU (8.8.5/8.8.5) with ESMTP id IAA43065 for ; Wed, 26 Feb 1997 08:19:04 -0500 Received: from dental3.ab.umd.edu (dental3.ab.umd.edu [134.192.84.10]) by comm1.ab.umd.edu (8.7.3/8.7.3) with ESMTP id IAA07552 for ; Wed, 26 Feb 1997 08:09:34 -0500 (EST) Received: from DENTAL_1/MAILQUEUE by dental3.ab.umd.edu (Mercury 1.21); 26 Feb 97 08:09:32 -5 Received: from MAILQUEUE by DENTAL_1 (Mercury 1.21); 26 Feb 97 08:09:28 -5 Message-Id: <204B0C12BC@dental3.ab.umd.edu> Date: Wed, 26 Feb 1997 08:09:26 EST Reply-To: JFM001@DENTAL3.AB.UMD.EDU Sender: owner-qrp-l@Lehigh.EDU Precedence: bulk From: "JOHN F. McCLUN" To: "Low Power Amateur Radio Discussion" Subject: RE: QRP + & RTTY - Computer control (a page or two) X-mailer: WinPMail v1.0 (R2) X-Listprocessor-Version: 8.1 beta -- ListProcessor(tm) by CREN Status: RO Gang - A little up-date on the computer control of the QRP +. The general concencious is that the rig should have both scan features: memory recall by name or freq, a CW typing buffer for transmit, an output format that will save QSO data for logging programs, and maybe other modes- like RTTY. I have used the BASIC program version I wrote this weekend. It works very well, I think. I really love being able to switch freqs while at the keyboard. Since listening to the results of your emails I see where a transmit buffer is going to be useful. The added featrues will not take very long to put in - just some more menu selections, etc. The Windows version will be the one that takes some time to complete but looks more like July now rather than later in the year. I'm getting to interested in this to let it lapse for days at a time. For all those who asked that it be compatible with knw'd , ysu, etc. it ain't gona happen. Their protocols and interfacing are no where near what I'm able to do to the Plus. This is an independent effort and not part of a MFG'ing effort. Hence the disparity of methods and results. I am using a very simple interface to keep cost down and interest up. This should be able to be adapted to other rigs as well. Next I might try and do the ARK series to see how that works. FOR RTTY to work I need someone who has done RTTY on the QRP + to contact me. I know some of us have. Really need to discuss how, what freq shifts ,coding and decoding methods( modes?), etc. The logging file from the Plus will be a text file with all data - time,freq, call, name, sig reports. This can go to your logging program via pipe line. So there you have the latest. But really need to hear from some RTTY folks to continue with that effort. Please contact me at this email address or at . John N3REY Always QRP! From w1hue@amsat.org Tue Mar 4 11:27:01 1997 Received: from eloi.inel.gov (eloi.INEL.GOV [134.20.173.29]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id LAA19761 for ; Tue, 4 Mar 1997 11:27:00 -0500 (EST) X-Received-x: from eloi.inel.gov (eloi.INEL.GOV [134.20.173.29]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id LAA19761 for ; Tue, 4 Mar 1997 11:27:00 -0500 (EST) Received: from pc-lve1 ([134.20.176.115]) by eloi.inel.gov (post.office MTA v2.0 0813 ID# 0-12374) with SMTP id AAA27705; Tue, 4 Mar 1997 09:27:18 -0700 Message-Id: <2.2.16.19970304162653.3c3fdf8e@eloi> X-Sender: lve1@eloi X-Mailer: Windows Eudora Pro Version 2.2 (16) Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Date: Tue, 04 Mar 1997 09:26:53 -0700 To: pepperb@gov.on.ca, Charlie Lofgren , bkassel@enet.net (Brian Kassel), Paul Erickson , Mike Rioux , John Dundas , af852@rgfn.epcc.Edu (William R Colbert), Bob_Tellefsen-CNSE97@email.mot.com, Christoph Zehntner HB9AJP , GREGOIRE@ENDOR.COM (ERNEST GREGOIRE), jdorson@bbs.mpcs.com (John Dorson), "GaryNye" , Bill Acito , "Mark B. Peterson" <70233.1106@CompuServe.COM>, bfollett@ditell.com, bcutter@teal.csn.net (Bob Cutter), john@antenna.demon.co.uk, "Francis A. McCrackin" , "Richard Hieber" , "JOHN F. McCLUN" , MCDANIELD@ouvaxa.cats.ohiou.edu, norbert.heyder@ri.dasa.de, N5EM@aol.com, larsennc@alaska.net (Nancy-KL7NY/Jim-AL7FS/Juliann-WL7MP), "Jerry L. Bartachek" , "Alvin G. Gann" , Peter Zenker <100743.3320@CompuServe.COM>, Wolfgang Schwarz <101511.61@CompuServe.COM>, Jerry KD0CA , jim_kc1fb@usa.pipeline.com (Jim Francoeur KC1FB), DYARNES@aol.com, "Bob Barry" , dgf@netcom.com (David Feldman), john andrews , Joel Malman , Dean Marzocca , rwright@soml.com (Robert Wright), Anders Wandahl , , , Scott Cranston , William McFadden , "Taylor Greg" , Art Winterbauer , , cookes@pop.jaring.my (Siong Teck Cheun @ Joseph), BERGESON@PPCC.CCCOES.EDU, George Gingell , "Doyle, Ron" , "Gert, SM5LWC" , , John Lockhart , Wayne Glover , DL3HQN@t-online.de (Ingolf Petzold), Barry Keating WD4MSM From: Larry East Subject: QRP PLUS Stuff Status: RO There will be three articles dealing with QRP PLUS modifications in the April issue of The QRP Quarterly -- hope you all have your ARCI memberships up to date! :-) How many would be interested in a "parts kit" for modifying the QRP PLUS final to get an honest (and distortion free) 5W of SSB power out? (Also reduces the 12M spurs due to better linearity.) The "kit" would include an MTP3055E MOSFET, a couple of Amadon cores, a cap or two and some miscellaneous resistors (and instructions). Cost would be around $5 including postage in the US. If there is enough interest (at least 20 or so) I might do it. If there is any interest expressed by this group, then I'll also post on QRP-L. 72, Larry W1HUE/7 From w1hue@amsat.org Wed Mar 5 10:29:44 1997 Received: from eloi.inel.gov (eloi.INEL.GOV [134.20.173.29]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id KAA02704 for ; Wed, 5 Mar 1997 10:29:42 -0500 (EST) X-Received-x: from eloi.inel.gov (eloi.INEL.GOV [134.20.173.29]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id KAA02704 for ; Wed, 5 Mar 1997 10:29:42 -0500 (EST) Received: from pc-lve1 ([134.20.176.115]) by eloi.inel.gov (post.office MTA v2.0 0813 ID# 0-12374) with SMTP id AAA13093; Wed, 5 Mar 1997 08:29:39 -0700 Message-Id: <2.2.16.19970305152905.14a743f4@eloi> X-Sender: lve1@eloi X-Mailer: Windows Eudora Pro Version 2.2 (16) Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Date: Wed, 05 Mar 1997 08:29:05 -0700 To: pepperb@gov.on.ca, Charlie Lofgren , bkassel@enet.net (Brian Kassel), Paul Erickson , Mike Rioux , John Dundas , af852@rgfn.epcc.Edu (William R Colbert), Bob_Tellefsen-CNSE97@email.mot.com, Christoph Zehntner HB9AJP , GREGOIRE@ENDOR.COM (ERNEST GREGOIRE), jdorson@bbs.mpcs.com (John Dorson), "GaryNye" , Bill Acito , "Mark B. Peterson" <70233.1106@CompuServe.COM>, bfollett@ditell.com, bcutter@teal.csn.net (Bob Cutter), john@antenna.demon.co.uk, "Francis A. McCrackin" , "Richard Hieber" , "JOHN F. McCLUN" , MCDANIELD@ouvaxa.cats.ohiou.edu, norbert.heyder@ri.dasa.de, n5em-qrp@msn.com, larsennc@alaska.net (Nancy-KL7NY/Jim-AL7FS/Juliann-WL7MP), "Jerry L. Bartachek" , "Alvin G. Gann" , Peter Zenker <100743.3320@CompuServe.COM>, Wolfgang Schwarz <101511.61@CompuServe.COM>, Jerry KD0CA , jim_kc1fb@usa.pipeline.com (Jim Francoeur KC1FB), DYARNES@aol.com, "Bob Barry" , dgf@netcom.com (David Feldman), john andrews , Joel Malman , Dean Marzocca , rwright@soml.com (Robert Wright), Anders Wandahl , , , Scott Cranston , William McFadden , "Taylor Greg" , Art Winterbauer , , cookes@pop.jaring.my (Siong Teck Cheun @ Joseph), BERGESON@PPCC.CCCOES.EDU, George Gingell , "Doyle, Ron" , "Gert, SM5LWC" , , John Lockhart , Wayne Glover , DL3HQN@t-online.de (Ingolf Petzold), Barry Keating WD4MSM From: Larry East Subject: New Final for QRP+/QRP++ Status: RO About 20 members of this group have expressed interest in a parts kit for modifying the QRP+ final, so I guess I'll do it -- but not until after I have completed my income tax forms and a few other pending items. I have been asked for some additional information on the mod. The modification involves replacing the IRF510 with a MTP3055E MOSFET and making a new output transformer. The new output transformer is wound on an Amidon 61-202 binocular (two hole) core and has a two turn primary and five turn secondary in series with the primary. This gives an impedance ratio of about 12:1. The large ratio is required to "swamp" the very high dynamic output capacitance of the MTP3055E. The parts required to modify the final are as follows: 1 MTP3055E power MOSFET. 1 Amidon 61-202 binocular core. 1 Amidon T30-2 (or T30-6) toroid core. 2 Amidon FB101-64 ferrite beads. 2 100 Ohm 1/4W composition resistors. 1 33 Ohm 1/4W composition resistor. 1 2.7K 1/4 composition resistor. 1 1.5K 1/4 composition resistor (QRP+ only). 1 0.1uF monolithic capacitor (small 50V type). 1 0.47uF monolithic or dipped tantalum capacitor. Some #22 and #26 (or #24) enameled wire, solder-wick, etc. If I buy in bulk, I figure that the cost of a parts kit including mailing in the US (and Canada) would be $4.00; add another $1 for overseas mailing. The MTP3055E is surprisingly inexpensive -- about $1 in single unit quantities. I have not performed this modification on a QRP++, but according to the manual I have it uses the same RF Amp board as the QRP+. However, one can't always rely on the documentation from Index... So, I would like a volunteer to try the mode on a QRP++ (that's the "new improved" version). I will supply all the parts and instructions; in return, I would expect feedback on any changes needed to the instructions, power output, problems encountered, etc. I only have one MTP3055E and one 61-202 core on hand, so I can only supply one complete set of parts. If you are interested in volunteering, here are the conditions: 1. You must have ability in electronics building as demonstrated by having built kits and/or home brew equipment, modified rigs, etc. 2. You must have access to an oscilloscope and a peak-reading Wattmeter. (If the 'scope is calibrated, then you could make power measurements with it and wouldn't really need the Wattmeter.) 3. You must agree to provide feedback to me no later than four weeks after receiving the parts and instructions. 4. And finally, you must agree to NOT hold me responsible for anything that goes wrong! :-) If you are interested, let me know ASAP so that I can get the parts in the mail before I leave on a trip this weekend. If I get more than one volunteer, I guess I'll have to draw names from a hat. 72, Larry W1HUE From w1hue@amsat.org Thu Mar 6 10:41:39 1997 Received: from eloi.inel.gov (eloi.INEL.GOV [134.20.173.29]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id KAA28723 for ; Thu, 6 Mar 1997 10:41:37 -0500 (EST) X-Received-x: from eloi.inel.gov (eloi.INEL.GOV [134.20.173.29]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id KAA28723 for ; Thu, 6 Mar 1997 10:41:37 -0500 (EST) Received: from pc-lve1 ([134.20.176.115]) by eloi.inel.gov (post.office MTA v2.0 0813 ID# 0-12374) with SMTP id AAA1939; Thu, 6 Mar 1997 08:41:56 -0700 Message-Id: <2.2.16.19970306154113.3b275e3c@eloi> X-Sender: lve1@eloi X-Mailer: Windows Eudora Pro Version 2.2 (16) Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Date: Thu, 06 Mar 1997 08:41:13 -0700 To: pepperb@gov.on.ca, Charlie Lofgren , bkassel@enet.net (Brian Kassel), Paul Erickson , Mike Rioux , John Dundas , af852@rgfn.epcc.Edu (William R Colbert), Bob_Tellefsen-CNSE97@email.mot.com, Christoph Zehntner HB9AJP , GREGOIRE@ENDOR.COM (ERNEST GREGOIRE), jdorson@bbs.mpcs.com (John Dorson), "GaryNye" , Bill Acito , "Mark B. Peterson" <70233.1106@CompuServe.COM>, bfollett@ditell.com, bcutter@teal.csn.net (Bob Cutter), john@antenna.demon.co.uk, "Francis A. McCrackin" , "Richard Hieber" , "JOHN F. McCLUN" , MCDANIELD@ouvaxa.cats.ohiou.edu, norbert.heyder@ri.dasa.de, n5em-qrp@msn.com, larsennc@alaska.net (Nancy-KL7NY/Jim-AL7FS/Juliann-WL7MP), "Jerry L. Bartachek" , "Alvin G. Gann" , Peter Zenker <100743.3320@CompuServe.COM>, Wolfgang Schwarz <101511.61@CompuServe.COM>, Jerry KD0CA , jim_kc1fb@usa.pipeline.com (Jim Francoeur KC1FB), DYARNES@aol.com, "Bob Barry" , dgf@netcom.com (David Feldman), john andrews , Joel Malman , Dean Marzocca , rwright@soml.com (Robert Wright), Anders Wandahl , , , Scott Cranston , William McFadden , "Taylor Greg" , Art Winterbauer , , cookes@pop.jaring.my (Siong Teck Cheun @ Joseph), BERGESON@PPCC.CCCOES.EDU, George Gingell , "Doyle, Ron" , "Gert, SM5LWC" , , John Lockhart , Wayne Glover , DL3HQN@t-online.de (Ingolf Petzold), Barry Keating WD4MSM From: Larry East Subject: No volunteers... Status: RO The response to my request for someone to try my final amplifier mod on a QRP++ has been under-whelming! Come on folks, there must be SOMEONE out there willing and able to do this for the benefit of all QRP++ owners in the world! :-) And remember --- FREE PARTS!! (A whole $3.89 worth...) By the way -- the use of a 'scope is NOT necessary to make the mod, but I would like the "volunteer" to have one in order to verify my measurements on the peak SSB power output that can be obtained without distortion. (A good spectrum analyzer would also work... :-) A peak reading Wattmeter would also be helpful, but not absolutely necessary. Come on guys, volunteer! (pretty please?) _________________________________________________________ "Any opinions expressed herein are my own and probably do not agree with those of my employer, the U.S. Government or my spouse" --... ...-- Larry V. East (W1HUE) Idaho Falls, ID e-mail: w1hue@amsat.org work: (208) 526-0081 home: (208) 529-2162 From w1hue@amsat.org Fri Mar 7 11:53:21 1997 Received: from eloi.inel.gov (eloi.INEL.GOV [134.20.173.29]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id LAA09318 for ; Fri, 7 Mar 1997 11:53:19 -0500 (EST) X-Received-x: from eloi.inel.gov (eloi.INEL.GOV [134.20.173.29]) by oucsace.cs.ohiou.edu (8.7.6/8.7.1) with ESMTP id LAA09318 for ; Fri, 7 Mar 1997 11:53:19 -0500 (EST) Received: from pc-lve1 ([134.20.176.115]) by eloi.inel.gov (post.office MTA v2.0 0813 ID# 0-12374) with SMTP id AAA22118; Fri, 7 Mar 1997 09:53:35 -0700 Message-Id: <2.2.16.19970307165241.1c37d56a@eloi> X-Sender: lve1@eloi X-Mailer: Windows Eudora Pro Version 2.2 (16) Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Date: Fri, 07 Mar 1997 09:52:41 -0700 To: "QRP+ Mail List" From: Larry East Subject: RE: Volunteers for QRP++ Mod Status: RO Three volunteers kindly stepped forward, but two have QRP+ rather than QRP++ rigs and the third has a QRP++ but no microphone. Since the object of the exercise is to test the mod in a QRP++ and perform before and after measurements on the SSB signal, I had to turn those folks down. Another alternative would be for someone to send me their QRP++ and let me try the mod and make the measurements. This would actually be best from my point of view since I could make whatever measurements I felt necessary (including spectrum analyzer measurements). However, would anyone be willing to let me "hack" their rig? Probably not... (How about you, Bill F.? You've seen the quality of my work!) Anyway, If someone (with a 'scope) decides to step forward and try the mod (I'll furnish the parts and instructions), or let me try it in their rig, let me know and I'll get back to you after I return from my travels. _________________________________________________________ "Any opinions expressed herein are my own and probably do not agree with those of my employer, the U.S. Government or my spouse" --... ...-- Larry V. East (W1HUE) Idaho Falls, ID e-mail: w1hue@amsat.org work: (208) 526-0081 home: (208) 529-2162 From owner-qrp-l@Lehigh.EDU Tue Apr 1 21:02:55 1997 Received: from fidoii.CC.Lehigh.EDU (fidoii.CC.Lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.8.5/8.7.1) with ESMTP id VAA05114 for ; Tue, 1 Apr 1997 21:02:54 -0500 (EST) X-Received-x: from fidoii.CC.Lehigh.EDU (fidoii.CC.Lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.8.5/8.7.1) with ESMTP id VAA05114 for ; Tue, 1 Apr 1997 21:02:54 -0500 (EST) Received: from Lehigh.EDU ([127.0.0.1]) by fidoii.cc.lehigh.edu with SMTP id <35685-40379>; Tue, 1 Apr 1997 21:02:32 -0500 Received: from nss2.CC.Lehigh.EDU ([128.180.1.26]) by fidoii.cc.lehigh.edu with ESMTP id <35569-31677>; Tue, 1 Apr 1997 21:01:11 -0500 Received: from dub-img-3.compuserve.com (dub-img-3.compuserve.com [149.174.206.133]) by nss2.CC.Lehigh.EDU (8.8.5/8.8.5) with SMTP id VAA29907 for ; Tue, 1 Apr 1997 21:01:02 -0500 Received: by dub-img-3.compuserve.com (8.6.10/5.950515) id VAA27446; Tue, 1 Apr 1997 21:00:28 -0500 Message-Id: <970402015710_70511.3041_IHD42-1@CompuServe.COM> Date: 01 Apr 97 20:57:10 EST Reply-To: 70511.3041@compuserve.com Sender: owner-qrp-l@Lehigh.EDU Precedence: bulk From: "Wilford D. Lindsey" <70511.3041@compuserve.com> To: "Low Power Amateur Radio Discussion" Subject: Help w/QRP+ X-To: QRP-L Discussion Group , "W. D. (Doc) Lindsey/K0EVZ" <70511.3041@compuserve.com> X-Listprocessor-Version: 8.1 beta -- ListProcessor(tm) by CREN Status: RO Gang: Anyone know whether the AGC on a QRP+ can be user-disabled or at least turned *way* down? How? What bad stuff can happen, if anything? All replies appreciated? 72/73, --Doc/K0EVZ qrp-l 864 cqc 414 mn-qrp 19 nj-qrp 69 ak/qrp 139 norcal arrl From owner-qrp-l@Lehigh.EDU Wed Apr 2 10:12:03 1997 Received: from fidoii.CC.Lehigh.EDU (fidoii.CC.Lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.8.5/8.8.5) with ESMTP id KAA10394 for ; Wed, 2 Apr 1997 10:12:01 -0500 (EST) Received: from Lehigh.EDU ([127.0.0.1]) by fidoii.cc.lehigh.edu with SMTP id <34916-29309>; Wed, 2 Apr 1997 10:07:57 -0500 Received: from nss2.CC.Lehigh.EDU ([128.180.1.26]) by fidoii.cc.lehigh.edu with ESMTP id <35594-36988>; Wed, 2 Apr 1997 09:47:53 -0500 Received: from mailrelay.csn.net (root@mailrelay1.csn.net [199.117.27.35]) by nss2.CC.Lehigh.EDU (8.8.5/8.8.5) with ESMTP id JAA40039 for ; Wed, 2 Apr 1997 09:42:40 -0500 Received: from p1.Glenwood-Springs.dialup.csn.net (p1.Glenwood-Springs.dialup.csn.net [199.117.105.1]) by mailrelay.csn.net (8.7.5/8.7.3) with SMTP id HAA18091 for ; Wed, 2 Apr 1997 07:42:20 -0700 Message-Id: <199704021442.HAA18091@mailrelay.csn.net> Date: Wed, 2 Apr 1997 07:42:20 -0700 Reply-To: bcutter@teal.csn.net Sender: owner-qrp-l@Lehigh.EDU Precedence: bulk From: bcutter@teal.csn.net (Bob Cutter) To: "Low Power Amateur Radio Discussion" Subject: QRP+ Memory Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" X-Sender: bcutter@teal.csn.net X-Mailer: Windows Eudora Version 1.4.4 X-Listprocessor-Version: 8.1 beta -- ListProcessor(tm) by CREN Status: RO My QRP+ has lost the memory frequencies when I turn it on. I can restore the "stock" frequencies by turning on with the "memory" button down. Has the battery gone south? 72, Bob KI0G From owner-qrp-l@Lehigh.EDU Wed Apr 2 15:01:24 1997 Received: from fidoii.CC.Lehigh.EDU (fidoii.CC.Lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.8.5/8.8.5) with ESMTP id PAA26729 for ; Wed, 2 Apr 1997 15:01:22 -0500 (EST) Received: from Lehigh.EDU ([127.0.0.1]) by fidoii.cc.lehigh.edu with SMTP id <35059-15994>; Wed, 2 Apr 1997 14:56:42 -0500 Received: from nss2.CC.Lehigh.EDU ([128.180.1.26]) by fidoii.cc.lehigh.edu with ESMTP id <34898-15994>; Wed, 2 Apr 1997 14:54:59 -0500 Received: from taex001.tamu.edu (root@TAEX001.TAMU.EDU [128.194.44.1]) by nss2.CC.Lehigh.EDU (8.8.5/8.8.5) with ESMTP id OAA96458 for ; Wed, 2 Apr 1997 14:54:40 -0500 Received: from taex003n.tamu.edu (TAEX003N.TAMU.EDU [128.194.44.60]) by taex001.tamu.edu (8.8.4/8.7.3) with ESMTP id NAA28418; Wed, 2 Apr 1997 13:54:34 -0600 Received: from TAEX003N/MAILQUEUE by taex003n.tamu.edu (Mercury 1.21); 2 Apr 97 13:57:41 CST6CDT Received: from MAILQUEUE by TAEX003N (Mercury 1.21); 2 Apr 97 13:57:32 CST6CDT Message-Id: <13E0A7551D5@taex003n.tamu.edu> Date: Wed, 2 Apr 1997 13:57:29 CDT Reply-To: gtaylor@TAEX003N.tamu.edu Sender: owner-qrp-l@Lehigh.EDU Precedence: bulk From: "Taylor Greg" To: "Low Power Amateur Radio Discussion" Subject: Re: QRP+ Memory X-To: "Low Power Amateur Radio Discussion" , bcutter@teal.csn.net X-Confirm-Reading-To: "Taylor Greg" X-pmrqc: 1 X-mailer: Pegasus Mail for Windows (v2.33) X-Listprocessor-Version: 8.1 beta -- ListProcessor(tm) by CREN Status: RO Good chance, I've been going through one of those puppies about every 6 months...something's wrong there somewhere but haven't had a chance to get after it (and its pretty easy to change the battery anyway) ....did post that issue to the list some time back and got some suggestions about potential areas to look which I'll see if I can dredge up and get to you.....maybe someone else will have the chance to check it out....... 72, Greg W5KJ > My QRP+ has lost the memory frequencies when I turn it on. I can restore > the "stock" frequencies by turning on with the "memory" button down. > > Has the battery gone south? > ****************************************************************************** Dr. Gregory S. Taylor !MAIL: SpSvcs 216 Extension Program Leader for ! College Station, TX 77843-2125 Community Development !VOICE: 409-862-8561 Texas Agricultural Extension Service!FAX: 409-847-8744 Texas A&M University System !EMAIL: Reply or g-taylor4@tamu.edu ****************************************************************************** From owner-qrp-l@Lehigh.EDU Wed Apr 2 17:54:14 1997 Received: from fidoii.CC.Lehigh.EDU (fidoii.CC.Lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.8.5/8.8.5) with ESMTP id RAA06391 for ; Wed, 2 Apr 1997 17:54:13 -0500 (EST) Received: from Lehigh.EDU ([127.0.0.1]) by fidoii.cc.lehigh.edu with SMTP id <34937-36988>; Wed, 2 Apr 1997 17:53:43 -0500 Received: from nss2.CC.Lehigh.EDU ([128.180.1.26]) by fidoii.cc.lehigh.edu with ESMTP id <34868-36988>; Wed, 2 Apr 1997 17:52:56 -0500 Received: from italy.it.earthlink.net (italy-c.it.earthlink.net [204.250.46.18]) by nss2.CC.Lehigh.EDU (8.8.5/8.8.5) with ESMTP id RAA117873 for ; Wed, 2 Apr 1997 17:52:42 -0500 Received: from 207.217.21.56 (pool056-max4.pasadena-ca-us.dialup.earthlink.net [207.217.21.56]) by italy.it.earthlink.net (8.8.5/8.8.5) with SMTP id OAA00168; Wed, 2 Apr 1997 14:51:59 -0800 (PST) Message-Id: <3342E5EC.72B2@earthlink.net> Date: Wed, 02 Apr 1997 15:04:12 -0800 Reply-To: kjlopez@earthlink.net Sender: owner-qrp-l@Lehigh.EDU Precedence: bulk From: Ken Lopez To: "Low Power Amateur Radio Discussion" Subject: Re: QRP+ Memory References: <13E0A7551D5@taex003n.tamu.edu> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-To: gtaylor@TAEX003N.tamu.edu X-Cc: Low Power Amateur Radio Discussion X-Mailer: Mozilla 2.0 (Macintosh; U; 68K) X-Listprocessor-Version: 8.1 beta -- ListProcessor(tm) by CREN Status: RO My QRP++ is a year old about now, and is still on the first battery. I wonder why the extreme variability? Ken, N6TZV From owner-qrp-l@Lehigh.EDU Wed Apr 2 22:59:28 1997 Received: from fidoii.CC.Lehigh.EDU (fidoii.CC.Lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.8.5/8.8.5) with ESMTP id WAA18930 for ; Wed, 2 Apr 1997 22:59:27 -0500 (EST) Received: from Lehigh.EDU ([127.0.0.1]) by fidoii.cc.lehigh.edu with SMTP id <35350-15994>; Wed, 2 Apr 1997 22:58:40 -0500 Received: from nss2.CC.Lehigh.EDU ([128.180.1.26]) by fidoii.cc.lehigh.edu with ESMTP id <35317-36988>; Wed, 2 Apr 1997 22:56:42 -0500 Received: from alpinet.net ([206.26.77.1]) by nss2.CC.Lehigh.EDU (8.8.5/8.8.5) with SMTP id WAA39506 for ; Wed, 2 Apr 1997 22:56:33 -0500 Received: from sunrise.alpinet.net by alpinet.net (SMI-8.6/SMI-SVR4) id UAA09078; Wed, 2 Apr 1997 20:57:26 -0700 Message-Id: <33432AA6.4E7C@alpinet.net> Date: Wed, 02 Apr 1997 20:57:26 -0700 Reply-To: doug@sunrise.alpinet.net Sender: owner-qrp-l@Lehigh.EDU Precedence: bulk From: Doug To: "Low Power Amateur Radio Discussion" Subject: Re: QRP+ Memory References: <199704021442.HAA18091@mailrelay.csn.net> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-Mailer: Mozilla 3.0 (Win95; U) X-Listprocessor-Version: 8.1 beta -- ListProcessor(tm) by CREN Status: RO Hi Bob....most likely you're right about the battery. It dosent take too much to check it...just a voltmeter and an idea what it should read. I think it takes a 2016 Lithium cell....not too expensive to be sure you've got it fixed. Swap it out just to be sure. I just got a nasty bug out of my Qrp+...had an intermittent cap in the Bfo output circuit, made me crazy 'cause the trouble wouldnt stay in long enough to catch it. But, finally got the scope on it and waited for it to fail. 'Turned out to be the series cap out of the Bfo... a 0.01 mono. I've not had any luck getting Bruce on the phone out at Index to tell him of this trouble...not that it's any big deal, but thought it'd be a good thing to tell him. So...on we go. 73 and good luck Doug, K7YD Livingston, MT Bob Cutter wrote: > > My QRP+ has lost the memory frequencies when I turn it on. I can restore > the "stock" frequencies by turning on with the "memory" button down. > > Has the battery gone south? > > 72, Bob KI0G From owner-qrp-l@Lehigh.EDU Thu Apr 3 11:01:09 1997 Received: from fidoii.CC.Lehigh.EDU (fidoii.CC.Lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.8.5/8.8.5) with ESMTP id LAA21588 for ; Thu, 3 Apr 1997 11:01:07 -0500 (EST) Received: from Lehigh.EDU ([127.0.0.1]) by fidoii.cc.lehigh.edu with SMTP id <35599-34986>; Thu, 3 Apr 1997 10:50:15 -0500 Received: from nss2.CC.Lehigh.EDU ([128.180.1.26]) by fidoii.cc.lehigh.edu with ESMTP id <35510-34986>; Thu, 3 Apr 1997 10:48:03 -0500 Received: from eloi.inel.gov (eloi.INEL.GOV [134.20.173.29]) by nss2.CC.Lehigh.EDU (8.8.5/8.8.5) with ESMTP id KAA83683 for ; Thu, 3 Apr 1997 10:44:08 -0500 Received: from pc-lve1 ([134.20.176.115]) by eloi.inel.gov (post.office MTA v2.0 0813 ID# 0-12374) with SMTP id AAA7829; Thu, 3 Apr 1997 08:44:59 -0700 Message-Id: <2.2.16.19970403154216.142f4e46@eloi> Date: Thu, 03 Apr 1997 08:42:16 -0700 Reply-To: w1hue@amsat.org Sender: owner-qrp-l@Lehigh.EDU Precedence: bulk From: Larry East To: "Low Power Amateur Radio Discussion" Subject: RE: Help w/QRP+ Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" X-Cc: "Wilford D. Lindsey" <70511.3041@compuserve.com> X-Sender: lve1@eloi X-Mailer: Windows Eudora Pro Version 2.2 (16) X-Listprocessor-Version: 8.1 beta -- ListProcessor(tm) by CREN Status: RO >Anyone know whether the AGC on a QRP+ can be user-disabled or at least >turned *way* down? How? What bad stuff can happen, if anything? > Sure, it can be disabled... but a better approach might be to add an RF gain control (which actually controls the AGC voltage) as outlined in my article in the January '96 issue of the ARCI QRP Quarterly. (The circuit described is recommended by Index.) 72, L. From w1hue@amsat.org Mon Apr 7 11:28:01 1997 Received: from eloi.inel.gov (eloi.INEL.GOV [134.20.173.29]) by oucsace.cs.ohiou.edu (8.8.5/8.8.5) with ESMTP id LAA03925 for ; Mon, 7 Apr 1997 11:27:59 -0400 (EDT) Received: from pc-lve1 ([134.20.176.115]) by eloi.inel.gov (post.office MTA v2.0 0813 ID# 0-12374) with SMTP id AAA27478; Mon, 7 Apr 1997 09:28:23 -0600 Message-Id: <2.2.16.19970407152707.189fadac@eloi> X-Sender: lve1@eloi X-Mailer: Windows Eudora Pro Version 2.2 (16) Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Date: Mon, 07 Apr 1997 09:27:07 -0600 To: "QRP+ Mail List" From: Larry East Subject: QRP++ Mods and Observations Status: RO Dave, WB0GAZ, was kind enough to loan me his QRP++ (an upgraded QRP+) to try out my "final mod". I made the mode and it works great! With the MTP3055E and associated components installed (see my article in the April QRP Quarterly for details), it produces up to 10W out on CW and a good clean 7-8W on SSB below 17M. Above 20M, the power drops off, but still a good 4-5W of SSB output on 10M. SSB output looks very clean on a 'scope. With the original IRF510 final, the SSB output showed severe clipping when I attempted to increase the output power above 4W or so. Dave had tacked a 10K resistor in parallel with R5 (100K) in the mic preamp as per a note from Index (and, I believe, posted on QRP-L). I found that 10K gave much less background noise and generally cleaner output, so I removed the original 100K resistor and put 10K in its place. An easy mod and well worth it if you haven't done this to your QRP++ (later models my use 10K rather than 100K). Contrary to what I was told by Bruce Franklin (the QRP-Plus designer), I cannot observe any significant effect of the limiting diodes (D1 and D2, I believe they are labeled) in the IF amp on the SSB signal. Bruce claimed in a letter to me that the diodes act as limiters in transmit and "are the basis for the SSB signal processing". In fact, the diodes are not directly in the transmit signal path. There is some signal across them during transmit, but it is well below the 0.25V or so conduction threshold of the diodes. I believe that the "limiting" was occurring in the IRF510 final! These diodes do limit the signal going into the SCAF during receive and are Bruce's cure for the infamous "AGC thump". However, the IF limiter causes a problem when the SCAF passband is less than the IF passband. Strong signals outside of the SCAF passband but still within the IF passband will cause the diodes to conduct and severely reduce the level of the signal one is trying to copy. It appears to the operator that the strong adjacent signal is "pumping" the AGC, but in fact it is "pumping" the IF limiter. Removing the diodes removes this problem, but then one has to contend with "AGC thump" on strong signals due to the delay through the SCAF (all of this is explained in my article in the January QRP Quarterly). Ah, but there is a solution: add a limiter AFTER the SCAF! I have posted such a limiter on QRP-L and this list and it is described in a file on the QRP-L WEB site as well as in my Jan. QQ article. So ... I removed the IF limiter diodes, retuned T4 for maximum receiver sensitivity and installed my audio limiter after the SCAF. No more "pumping" from adjacent signals and no significant "AGC thump"! However, now that there is no limiter before the SCAF, very strong signals can cause overloading of the SCAF (see my Jan QQ article again). This problem can be overcome (usually) by switching in the 20dB input attenuator. Now that I have modified Dave's rig, I'm really beginning to like it! The gain compression mic preamp gives more SSB "punch" than I get with my modified QRP+, the receiver is hotter (about a 6dB better signal to noise ratio), and the ALC action on CW reduces the need to reset the power output when changing bands (power does drop off slightly at a given setting of the level control above 20M, but not bad). Gee, Dave, I may not want to give it back!! (Just kidding... :-) By the way, I think I have discovered why the QRP++ receiver is "hotter" than the QRP+: The QRP++ has shielded inductors (LP filter, IF tuned output, etc.) in place of the open toroidal inductors used in the QRP+. Placing a finger near the open toroids in LP filter before the mixer in my QRP noticeably increases the receiver noise level, so I think that they are picking up a little digital noise from the CPU and/or the LCD display. 72, Larry W1HUE/7 PS -- If you would like a copy of my QRP Quarterly articles on QRP-Plus modifications and enhancements, send a business size SASE to me. My address: Larry East, W1HUE 1355 S. Rimline Dr. Idaho Falls, ID 83401 Be sure to tell me what the SASE if for! :-) From w1hue@amsat.org Mon Apr 7 11:59:29 1997 Received: from eloi.inel.gov (eloi.INEL.GOV [134.20.173.29]) by oucsace.cs.ohiou.edu (8.8.5/8.8.5) with ESMTP id LAA05474 for ; Mon, 7 Apr 1997 11:59:28 -0400 (EDT) Received: from pc-lve1 ([134.20.176.115]) by eloi.inel.gov (post.office MTA v2.0 0813 ID# 0-12374) with SMTP id AAA21; Mon, 7 Apr 1997 09:59:59 -0600 Message-Id: <2.2.16.19970407155846.276fb170@eloi> X-Sender: lve1@eloi X-Mailer: Windows Eudora Pro Version 2.2 (16) Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Date: Mon, 07 Apr 1997 09:58:46 -0600 To: qrp-l@lehigh.edu From: Larry East Subject: QRP-Plus Mods Cc: "QRP+ Mail List" Status: RO I have published two articles on QRP-Plus modifications and enhancements -- the first appeared in the January 1997 ARCI QRP Quarterly and the second in the April '97 QRP Quarterly. If you are not an ARCI member (shame on you!) and would like a copy of the articles, send an SASE to me at the address shown below (be sure to tell me what it is for!) If you would also like a sample QRP Quarterly (not necessarily a recent issue) and a member application form, enclose $2 (to cover mailing of the Quarterly). There is one minor correction to the April article in the section "An improved Final MOSFET". The 33 Ohm resistor in the feedback network should be 1/2 W; I originally used a 1/4 resistor and it showed signs of "heat stress" after awhile. I am now using two 68 Ohm 1/4W resistors in parallel as this required less mounting space than a 33 Ohm 1/2W unit. By the way -- I have now performed this mod on a "new improved" model (commonly referred to as a "QRP++") and it works great! Larry East, W1HUE 1355 S. Rimline Dr. Idaho Falls, ID 83401 From owner-qrp-l@Lehigh.EDU Wed Apr 9 13:36:33 1997 Received: from fidoii.CC.Lehigh.EDU (fidoii.CC.Lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.8.5/8.8.5) with ESMTP id NAA23237 for ; Wed, 9 Apr 1997 13:36:32 -0400 (EDT) Received: from Lehigh.EDU ([127.0.0.1]) by fidoii.cc.Lehigh.EDU with SMTP id <35424-45040>; Wed, 9 Apr 1997 13:24:38 -0400 Received: from nss2.CC.Lehigh.EDU ([128.180.1.26]) by fidoii.cc.Lehigh.EDU with ESMTP id <35410-38126>; Wed, 9 Apr 1997 13:21:04 -0400 Received: from jason01.u.washington.edu (jason01.u.washington.edu [140.142.70.24]) by nss2.CC.Lehigh.EDU (8.8.5/8.8.5) with ESMTP id NAA98524 for ; Wed, 9 Apr 1997 13:19:54 -0400 Received: from homer24.u.washington.edu (homer24.u.washington.edu [140.142.78.14]) by jason01.u.washington.edu (8.8.4+UW96.12/8.8.4+UW97.03) with ESMTP id KAA11376; Wed, 9 Apr 1997 10:19:53 -0700 Received: from localhost (slee@localhost) by homer24.u.washington.edu (8.8.4+UW96.12/8.8.4+UW97.03) with SMTP id KAA26754; Wed, 9 Apr 1997 10:19:53 -0700 Message-Id: Date: Wed, 9 Apr 1997 10:19:52 -0700 (PDT) Reply-To: slee@u.washington.edu Sender: owner-qrp-l@Lehigh.EDU Precedence: bulk From: "'AB7HI' Stephen Lee" To: "Low Power Amateur Radio Discussion" Subject: Re: QRP+ In-Reply-To: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII X-To: "J. Skalski" X-Cc: Low Power Amateur Radio Discussion X-Listprocessor-Version: 8.1 beta -- ListProcessor(tm) by CREN Status: RO What is remarkable is that Index Labs chose to use a non-locking chip for their processor code. Each QRP+ has its code freely available to its owner. It is possible to remove the socketed ROM and then read the ROM data using an EPROM programmer. There may be some information in the ROM code that is specific to a particular unit. One item is the serial number. Another may be offset calibration data for the DDS. When I ask Bruce Franklin if he used a commercial assembler program to write the code he said he hadn't, but that it had all been done by hand. "Plug and crank" I think he said. Stephen Lee, AB7HI, Tacoma, WA slee@u.washington.edu On Wed, 9 Apr 1997, J. Skalski wrote: > It would be great if Index made the code available for their chip if they > decide not to repair the QRP+. > > Jim N2GO From owner-qrp-l@Lehigh.EDU Wed Apr 9 14:54:07 1997 Received: from fidoii.CC.Lehigh.EDU (fidoii.CC.Lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.8.5/8.8.5) with ESMTP id OAA27039 for ; Wed, 9 Apr 1997 14:54:06 -0400 (EDT) Received: from Lehigh.EDU ([127.0.0.1]) by fidoii.cc.Lehigh.EDU with SMTP id <35424-55274>; Wed, 9 Apr 1997 14:53:45 -0400 Received: from nss2.CC.Lehigh.EDU ([128.180.1.26]) by fidoii.cc.Lehigh.EDU with ESMTP id <35349-45040>; Wed, 9 Apr 1997 14:52:33 -0400 Received: from x18.boston.juno.com (x18.boston.juno.com [205.231.101.29]) by nss2.CC.Lehigh.EDU (8.8.5/8.8.5) with ESMTP id OAA79882 for ; Wed, 9 Apr 1997 14:52:28 -0400 Received: (from tahrens1@juno.com) by x18.boston.juno.com (queuemail) id OmG29550; Wed, 09 Apr 1997 14:48:59 EDT Message-Id: <19970409.135616.16295.2.tahrens1@juno.com> Date: Wed, 09 Apr 1997 14:48:59 EDT Reply-To: tahrens1@juno.com Sender: owner-qrp-l@Lehigh.EDU Precedence: bulk From: tahrens1@juno.com (Tim H. Ahrens) To: "Low Power Amateur Radio Discussion" Subject: QRP+ X-Mailer: Juno 1.15 X-Juno-Line-Breaks: 0-5 X-Listprocessor-Version: 8.1 beta -- ListProcessor(tm) by CREN Status: RO Anybody know what processor (MPU/MCU) the QRP+ uses? Thanks, Tim W5FN From w1hue@amsat.org Wed Apr 9 15:34:07 1997 Received: from eloi.inel.gov (eloi.INEL.GOV [134.20.173.29]) by oucsace.cs.ohiou.edu (8.8.5/8.8.5) with ESMTP id PAA01540 for ; Wed, 9 Apr 1997 15:34:05 -0400 (EDT) Received: from pc-lve1 ([134.20.176.115]) by eloi.inel.gov (post.office MTA v2.0 0813 ID# 0-12374) with SMTP id AAA27901; Wed, 9 Apr 1997 13:34:18 -0600 Message-Id: <2.2.16.19970409193245.45279a62@eloi> X-Sender: lve1@eloi X-Mailer: Windows Eudora Pro Version 2.2 (16) Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Date: Wed, 09 Apr 1997 13:32:45 -0600 To: "QRP+ Mail List" From: Larry East Subject: QRP+ Mod Kits Status: RO I have decided against putting together parts kits for the QRP+ "New Final" mod (or any other mods, for that matter). There are not that many parts involved and they are all easily obtainable in the US and Europe. In the US, all parts except the MTE3055E MOSFET, the ferrite beads and cores can be obtained from any electronics supply house including Radio Shack. MTE3055E's can be obtained from a number of mail order houses, including Newark Electronics and Mouser. Mouser has the best price and no minimum order requirement -- but you might want to order more than one $0.79 MOSFET! There is also an NTE "replacement" device that will probably work (but perhaps not a well as the "original") and can be ordered (at a price...) through local parts supply houses, perhaps even Radio Shack. Attempts to connect to the NTE web site (www.nteinc.com) this morning have been unsuccessful so I haven't been able to look up the part number. The cores and beads can be obtained from a number of sources including Ocean States Electronics and (possibly) Buckeye Electronics. They can also be ordered directly from Amidon or from "Bytemark" -- check out their web site: http://bytemark.com/amidon/ IMPORTANT NOTE: Make sure that the bead you use on the "cold" end of the output transformer is #64 mix -- DO NOT use a bead meant for lower frequency use! It's not all that critical that a bead be placed on the transformer lead, so you can probably get by without one if you don't have an FB101-64 bead. The type of bead used for the RF choke in the +12V line is not critical. If you do use one, make sure it is on the CORRECT lead. Also make sure you mount the transformer correctly: free end of 2T primary to +12V (and put the bead, if any, on this lead), the free end of the 5T secondary to the output filters and the common leads (the ones twisted together) to the FET. Another note: For a QRP+ (NOT QRP++), the cap (C12) that bypasses pin 2 of U2 on the Audio Board should be 1.0uF, NOT 0.01uF as stated in my April QQ article. 0.01uF will work, 0.1uF is better, but a 1.0uF cap (tantalum or electrolytic) seems to be the best choice. I don't recommend using anything larger than about 3uF. And a final note: For a QRP++, replacing R16 on the RF board with a 2.7K resistor (as per my article) will allow an output power of about 10W (with the new final) on the low bands. Leaving it at its original value (2K) will probably allow at least 7W output, so there is no real need to change it. You should limit SSB output (via the output power control) on 15M and above to no more than 5W to prevent distortion. For a QRP+, you will probably have to change R16 to 2.7K (or even 3.3K) to get a full 5W out on SSB. Again, limit SSB output to 4 or 5W on the higher bands to prevent distortion (via the mic gain control; the RF output control has NO EFFECT in SSB mode in the QRP+). Check the SSB RF envelope on a 'scope, if you have access to one, to determine the maximum output that can be obtained on various bands without "flat topping". _________________________________________________________ "Any opinions expressed herein are my own and probably do not agree with those of my employer, the U.S. Government or my spouse" --... ...-- Larry V. East (W1HUE) Idaho Falls, ID e-mail: w1hue@amsat.org work: (208) 526-0081 home: (208) 529-2162 From w1hue@amsat.org Tue Apr 15 15:44:49 1997 Received: from eloi.inel.gov (eloi.INEL.GOV [134.20.173.29]) by oucsace.cs.ohiou.edu (8.8.5/8.8.5) with ESMTP id PAA18083 for ; Tue, 15 Apr 1997 15:44:47 -0400 (EDT) Received: from pc-lve1 ([134.20.176.115]) by eloi.inel.gov (post.office MTA v2.0 0813 ID# 0-12374) with SMTP id AAA14221; Tue, 15 Apr 1997 13:45:11 -0600 Message-Id: <2.2.16.19970415194236.3e6f7a0a@eloi> X-Sender: lve1@eloi X-Mailer: Windows Eudora Pro Version 2.2 (16) Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Date: Tue, 15 Apr 1997 13:42:36 -0600 To: "QRP+ Mail List" From: Larry East Subject: QRP++ Mods Info Available Status: RO I have put together some notes containing more information on QRP+/QRP++ mods. These notes augment, rather than replace, my QRP Quarterly articles and contain a couple of corrections, some general notes and some information specific to modifying the QRP++. I can provide a copy of the notes (NOT the articles) as an attached file in MS-Word 6.0 format (no, I won't convert it to ASCII, so don't ask!). If you would like a copy, send me email requesting "QRP+ mods notes" or send an SASE to: Larry East 1355 S. Rimline Dr. Idaho Falls, ID 83401 If you also want a copy of my QRP Quarterly articles, send an SASE containing two units of postage (mark it "QRP+ articles and notes"). 72, Larry W1HUE/7 PS -- If you have already sent me an SASE for the articles, you will also be getting the notes. From owner-qrp-l@lehigh.edu Fri Apr 18 17:43:57 1997 Received: from fidoii.CC.Lehigh.EDU (fidoii.CC.Lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.8.5/8.8.5) with ESMTP id RAA10688 for ; Fri, 18 Apr 1997 17:43:55 -0400 (EDT) Received: from Lehigh.EDU ([127.0.0.1]) by fidoii.cc.Lehigh.EDU with SMTP id <35255-56666>; Fri, 18 Apr 1997 17:43:42 -0400 Received: from nss2.CC.Lehigh.EDU ([128.180.1.26]) by fidoii.cc.Lehigh.EDU with ESMTP id <35219-34140>; Fri, 18 Apr 1997 17:42:46 -0400 Received: from eloi.inel.gov (eloi.INEL.GOV [134.20.173.29]) by nss2.CC.Lehigh.EDU (8.8.5/8.8.5) with ESMTP id RAA119896 for ; Fri, 18 Apr 1997 17:42:30 -0400 Received: from pc-lve1 ([134.20.176.115]) by eloi.inel.gov (post.office MTA v2.0 0813 ID# 0-12374) with SMTP id AAA13096; Fri, 18 Apr 1997 15:43:24 -0600 Message-Id: <2.2.16.19970418214021.3027390e@eloi> Date: Fri, 18 Apr 1997 15:40:21 -0600 Reply-To: w1hue@amsat.org Sender: owner-qrp-l@lehigh.edu Precedence: bulk From: Larry East To: "Low Power Amateur Radio Discussion" Subject: RE: qrp++ experment Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" X-To: jdenison@mail.morelr.com X-Cc: qrp-l@Lehigh.EDU X-Sender: lve1@eloi X-Mailer: Windows Eudora Pro Version 2.2 (16) X-Listprocessor-Version: 8.1 beta -- ListProcessor(tm) by CREN Status: RO > After reading the qst evaluation of the qrp++ and the article on >xmtr modifyication in april qrp quarterly, I became concerned about the >spurs that seemed down not quite enough. For reasons I won't go into I can >not do the xmtr mod nor do I know of anyone who wants to do it for me. SO, I >have been trying to think of some way I could add to the reduction of spurs. >I really don't won't to get rid of the qrp++ is has too many good things >going for it. > All spurs from the QRP++, except the second harmonics from 30M, 15M and possibly 12M, are at least 40dB below the carrier level. (This is *not* the case with an unmodified QRP+.) The second harmonics from the above mentioned bands are down about 30dB -- legal in the US if you keep the power at 5W or below. The harmonics in question can be reduced at least another 10dB (15dB in some cases) by installing new output filters for the affected bands, as described in my April QRP Quarterly article. This is not a particular difficult mod and you should be able to find someone locally do it for you. As for an antenna tuner reducing spurs: Yes, you will probably get some reduction, particularly if you use a "pi" tuner which is effectively a low pass filter. (A "T" configuration tuner usually acts as a high-pass filter, or at best, a very broad bandpass filter.) Using a resonant antenna will also help. 72, Larry W1HUE/7 From owner-qrp-l@Lehigh.EDU Sun Apr 20 22:02:35 1997 Received: from fidoii.CC.Lehigh.EDU (fidoii.CC.Lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.8.5/8.8.5) with ESMTP id WAA14312 for ; Sun, 20 Apr 1997 22:02:34 -0400 (EDT) Received: from Lehigh.EDU ([127.0.0.1]) by fidoii.cc.Lehigh.EDU with SMTP id <35810-68030>; Sun, 20 Apr 1997 22:01:59 -0400 Received: from nss2.CC.Lehigh.EDU ([128.180.1.26]) by fidoii.cc.Lehigh.EDU with ESMTP id <35087-68030>; Sun, 20 Apr 1997 22:00:49 -0400 Received: from passport.ipass.net (passport.ipass.net [198.79.53.4]) by nss2.CC.Lehigh.EDU (8.8.5/8.8.5) with ESMTP id WAA131538 for ; Sun, 20 Apr 1997 22:00:43 -0400 Received: from 486-computer (customs215.ipass.net [207.120.205.144]) by passport.ipass.net (8.8.5/8.8.5) with ESMTP id WAA09897 for ; Sun, 20 Apr 1997 22:00:40 -0400 (EDT) Message-Id: <199704210200.WAA09897@passport.ipass.net> Date: Sun, 20 Apr 1997 21:57:35 -0400 Reply-To: n4elm@ipass.net Sender: owner-qrp-l@Lehigh.EDU Precedence: bulk From: "N4ELM" To: "Low Power Amateur Radio Discussion" Subject: QRP++ notes and comments (long) MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit X-To: X-MSMail-Priority: Normal X-Priority: 3 X-Mailer: Microsoft Internet Mail 4.70.1155 X-Listprocessor-Version: 8.1 beta -- ListProcessor(tm) by CREN Status: RO After using the new QRP++ and Companion tuner since February, here are some notes and mods. I have been using the QRP++ and Companion mostly from hotel rooms on business trips. Antenna setups have been fair to miserable. When receiving CW with the bandwidth set tighter than about 1.4 Khz, strong adjacent signals in the IF passband swamp out the desired signal. It sounds like a extremely strong, noisy CW signal. Setting the SCAF filter to 2.4 Khz position helps but then you have minimum selectivity. I tried the RF gain mod suggested by Bruce. It helps some, but not much. The SSB transmit audio is excellent. I've gotten very good reports on the audio even on 75 Meters. My mike is a generic electret mounted in a surplus enclosure. I attached a switch to a small cable with a plug into the key jack to use as a "tune" button. The noise bridge in the Companion takes getting used to but it appears to work well. The tuner circuit has worked on both twinlead and coax type feeds. I've used small resonant loops, a 60 ft., 30 ga. wire, and a coax fed, 20 meter dipole. I also use 2 - 16 ft. or 1 - 33 ft. radial on the tuner ground lug. The Companion has no ON/OFF switch or fuse between the battery, the noise bridge and the radio cable. Once after being stored for a couple of weeks without charging, the battery died while I was trying to check into a net. The noise bridge had drained down the battery. The cable to the radio, being hot all the time, also arced on the radio connector while trying to plug it in. After this happened several times, I decided to do a field modification to the Companion. I added an Airpax 4.0 amp circuit breaker between the battery and the noise bridge and radio power cable. I got this breaker at a hamfest but Ten-Tec has used this same type of breaker on their HF rigs. It mounts in a 5/8" hole and looks like a toggle switch on the outside. I opened up the tuner case, unsoldered, and removed the cable for the wall cube charger from the power supply board. I mounted a coaxial socket (Radio Shack) on the upper right rear of the tuner (to the right of the GND binding post) and wired it to the power supply board. A coaxial plug (Radio Shack) attached to the end of the cable completed the new wiring for the wall cube charger. I removed the strain relief grommet from the original hole for the charger cable, enlarged it to 5/8 ", and mounted the circuit breaker. The circuit breaker is an exact fit for the available space so go carefully if you try to duplicate this. From the rear, on the left side of the tuner the circuit breaker is at the bottom, next up is the cable for the radio, then the two SO-239s for the tuner. It is not shown in the schematic but the power supply board has a blocking diode on it to prevent discharging the battery. (Unplug the battery connector first) I removed the noise bridge and the radio cable positive leads from the power supply positive terminal post and attached them to the "load" terminal of the breaker. I ran a new wire from the other breaker terminal back up to the power supply positive terminal post to complete the circuit. Now the circuit breaker provides protection and switching for the noise bridge and radio power. The battery can be charged whether the breaker is on or off by plugging in the charger cable. I may also be able to use the new charger connection to supply power from a solar panel to charge the battery. I'm working on some kind of padded box to put all the radio stuff in that will survive air travel. So far, in the airport security lines I've had to unpack the radio gear to get down to the laptop PC to turn it on but no one has even commented on the radio, tuner, keyer, wires, and other stuff. 73 - Dave, N4ELM. From owner-qrp-l@Lehigh.EDU Wed Apr 23 19:26:35 1997 Received: from fidoii.CC.Lehigh.EDU (fidoii.CC.Lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.8.5/8.8.5) with ESMTP id TAA13407 for ; Wed, 23 Apr 1997 19:26:32 -0400 (EDT) Received: from Lehigh.EDU ([127.0.0.1]) by fidoii.cc.Lehigh.EDU with SMTP id <35063-34834>; Wed, 23 Apr 1997 19:25:56 -0400 Received: from nss2.CC.Lehigh.EDU ([128.180.1.26]) by fidoii.cc.Lehigh.EDU with ESMTP id <34979-34834>; Wed, 23 Apr 1997 19:18:10 -0400 Received: from erinet.com (eri.erinet.com [207.0.229.18]) by nss2.CC.Lehigh.EDU (8.8.5/8.8.5) with ESMTP id TAA84792 for ; Wed, 23 Apr 1997 19:18:01 -0400 Received: from timcook.erinet.com (dlp231.dayton.eri.net [207.90.117.41]) by erinet.com (8.8.5/8.8.0) with SMTP id TAA12450 for ; Wed, 23 Apr 1997 19:17:38 -0400 (EDT) Message-Id: <335E9742.56BC@erinet.com> Date: Wed, 23 Apr 1997 19:12:02 -0400 Reply-To: timcook@erinet.com Sender: owner-qrp-l@Lehigh.EDU Precedence: bulk From: timcook@erinet.com To: "Low Power Amateur Radio Discussion" Subject: Index Labs QRP+ MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-To: QRPL X-Mailer: Mozilla 3.0 (Win95; I) X-Listprocessor-Version: 8.1 beta -- ListProcessor(tm) by CREN Status: RO does anyone know if it is still possible to get an eprom update for an original qrp+? I am concerned about the cw keying characteristics especially when using an external keyer above 30-35 wpm. Did Index Labs make any change the firmware on the later units of the first version (1000+ ser. no.)? Thanks for any info Tim NZ8J From owner-qrp-l@Lehigh.EDU Mon May 12 16:56:50 1997 Received: from fidoii.CC.lehigh.EDU (fidoii.CC.lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.8.5/8.8.5) with ESMTP id QAA17765 for ; Mon, 12 May 1997 16:56:48 -0400 (EDT) Received: from Lehigh.EDU ([127.0.0.1]) by fidoii.cc.Lehigh.EDU with SMTP id <35044-59716>; Mon, 12 May 1997 16:56:00 -0400 Received: from nss2.CC.Lehigh.EDU ([128.180.1.26]) by fidoii.cc.Lehigh.EDU with ESMTP id <34855-59716>; Mon, 12 May 1997 16:54:28 -0400 Received: from punt-1.mail.demon.net (relay-7.mail.demon.net [194.217.242.9]) by nss2.CC.Lehigh.EDU (8.8.5/8.8.5) with SMTP id QAA167201 for ; Mon, 12 May 1997 16:54:21 -0400 Received: from barville.demon.co.uk ([194.222.12.77]) by punt-1.mail.demon.net id aa0607911; 12 May 97 21:20 BST Message-Id: Date: Mon, 12 May 1997 21:14:27 +0100 Reply-To: peter@barville.demon.co.uk Sender: owner-qrp-l@Lehigh.EDU Precedence: bulk From: Peter Barville To: "Low Power Amateur Radio Discussion" Subject: QRP+ MIME-Version: 1.0 X-To: QRP-L@Lehigh.EDU X-Mailer: Turnpike Version 3.01 X-Listprocessor-Version: 8.1 beta -- ListProcessor(tm) by CREN Status: RO Hi Folks I recently acquired an early (seriaL Nr 224) QRP+ tcvr. Having read through the QRP Quarterly article about suggested mods, I decided today to put in the 78L05 regulator for the PA bias (mine just had the resistor, R14, fitted). Having done that, I then proceeded to set up the standing current on the PA to around 900mA, as suggested in the article. However, I find that the rig is prone to instability (noticed when running the rig into an matched aerial on 30m) unless the standing current is reduced to (say) 700mA. The instablity manifests itself as an rf output (don't know what frequency), even when the power control is set at zero. It seems to be swamped, however, if normal drive is applied. I also tried running ssb for the first time today, without much success. I can't get more than around 750mW out, and the audio sounds (and looks, on the 'scope) very non-linear. As if much more standing PA current is required. I haven't had the chance to investigate furhter yet. Has anybody else had similar experiences with their magic 'Cubes'? -- 72, Peter G3XJS ( http://www.barville.demon.co.uk/qrpinfo.htm ) From owner-qrp-l@Lehigh.EDU Tue May 13 15:40:40 1997 Received: from fidoii.CC.lehigh.EDU (fidoii.CC.lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.8.5/8.8.5) with ESMTP id PAA17412 for ; Tue, 13 May 1997 15:40:39 -0400 (EDT) Received: from Lehigh.EDU ([127.0.0.1]) by fidoii.cc.Lehigh.EDU with SMTP id <35307-40914>; Tue, 13 May 1997 15:33:43 -0400 Received: from nss2.CC.Lehigh.EDU ([128.180.1.26]) by fidoii.cc.Lehigh.EDU with ESMTP id <35273-18384>; Tue, 13 May 1997 15:29:44 -0400 Received: from punt-2.mail.demon.net (relay-11.mail.demon.net [194.217.242.137]) by nss2.CC.Lehigh.EDU (8.8.5/8.8.5) with SMTP id PAA102905 for ; Tue, 13 May 1997 15:29:18 -0400 Received: from barville.demon.co.uk ([194.222.12.77]) by punt-2.mail.demon.net id ab1010695; 13 May 97 19:47 BST Message-Id: Date: Tue, 13 May 1997 19:44:21 +0100 Reply-To: peter@barville.demon.co.uk Sender: owner-qrp-l@Lehigh.EDU Precedence: bulk From: Peter Barville To: "Low Power Amateur Radio Discussion" Subject: QRP+ .. Latest findings MIME-Version: 1.0 X-To: QRP-L@Lehigh.EDU X-Mailer: Turnpike Version 3.01 X-Listprocessor-Version: 8.1 beta -- ListProcessor(tm) by CREN Status: RO I was talking yesterday about biasing problems with the QRP+. In fact, I have now discovered that I'd made a mistake - the QQ article talked about an increase in standing current *to* around 900mA, and NOT *of* 900mA. Apologies for my error. I discovered that an increase in current of around 550mA, to about 960mA produced a clean 2 tone trace on the scope (and now no sign of instability, of course). However, this was still with only a tiny amount of output power - maybe 500mW max. I decided to do another of the QQ mods, and increase R16 on the XMTR board, in the hope it would decrease the alc action, and thus enable the rig to run more power on ssb. I also decreased R17 to 100 ohms (as suggested, to speed up alc response time). Having done that, my output power dropped to (pretty well) nothing! So, I then lifted R17 completely, thus removing all alc action (and output reading on the meter). Bingo, I can now run the rig with a 2 tone input up to the point where it begins to flat-top (around 2 to 3 watts). My question is, why am I apparently suffering from such severe alc action? It's pretty well impossible to monitor voltages etc when the boards are re-installed, but I assume too much voltage is being applied to pin 2 of U2 on the AF Board. Synthesiser Problem ------------------- My rig has a serious chirp on 17m cw, but has a reasonable note on all other bands. It occured to me that 17m coverage would be at the extreme end of the range of either the middle vco, or the highest (68MHz - 79.7MHz) vco. Maybe the synthesiser was struggling to stay in lock - a suspicion borne out by the fact that the chirp is worse on this band if the IRT is switched on. Then I discovered that the rig appears to swap from the middle vco to the highest vco as you tune across 18.129 (approx). It produces quite a noise burst as it does so. Low and behold, bad chirp 100Hz below the changeover point, and (almost) no chirp 100Hz abaove! I conclude, therefore, that the middle vco is only just locking at the top end of its coverage, but that the top vco is quite happy at the bottom of its range. Question is .. can one move the changeover point to just below 18068KHz? Alternatively, how could I improve the lock state of the middle vco? Any help/comments would be appreciated. I'll get this Cube knocked into shape yet! -- 72, Peter G3XJS ( http://www.barville.demon.co.uk/qrpinfo.htm ) From owner-qrp-l@Lehigh.EDU Wed May 14 15:50:50 1997 Received: from fidoii.CC.lehigh.EDU (fidoii.CC.lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.8.5/8.8.5) with ESMTP id PAA04444 for ; Wed, 14 May 1997 15:50:49 -0400 (EDT) Received: from Lehigh.EDU ([127.0.0.1]) by fidoii.cc.Lehigh.EDU with SMTP id <35289-12370>; Wed, 14 May 1997 15:40:55 -0400 Received: from nss2.CC.Lehigh.EDU ([128.180.1.26]) by fidoii.cc.Lehigh.EDU with ESMTP id <35278-18266>; Wed, 14 May 1997 15:39:35 -0400 Received: from punt-2.mail.demon.net (relay-11.mail.demon.net [194.217.242.137]) by nss2.CC.Lehigh.EDU (8.8.5/8.8.5) with SMTP id PAA168466 for ; Wed, 14 May 1997 15:39:26 -0400 Received: from barville.demon.co.uk ([194.222.12.77]) by punt-2.mail.demon.net id aa1026519; 14 May 97 19:37 BST Message-Id: <$7MHJNAqLgezEwgr@barville.demon.co.uk> Date: Wed, 14 May 1997 19:22:34 +0100 Reply-To: peter@barville.demon.co.uk Sender: owner-qrp-l@Lehigh.EDU Precedence: bulk From: Peter Barville To: "Low Power Amateur Radio Discussion" Subject: QRP+ saga MIME-Version: 1.0 X-To: QRP-L@Lehigh.EDU X-Mailer: Turnpike Version 3.01 X-Listprocessor-Version: 8.1 beta -- ListProcessor(tm) by CREN Status: RO Didn't want to spend even more time on the Cube today, but did spend 40 minutes changing the alc resistors yet again. I've now put in a 3.3K for R16 (XMTR board) and gone back to using a 1K for R17. Low and behold, things are now looking more as they should. I get 2 or 3 watts of clean ssb (2-tone waveform on the 'scope) without the alc grabbing hold too soon (running on about 12.75 volts). Don't think the rig will run more output though, without flat-topping, so may consider doing the PA replacement mod (QQ). I am still very keen to know if there is a solution to the synthesiser problem on 17m. Does it have to swap vco's around 18129KHz, or could I persuade it to change to the higher vco just below the band bottom edge? Alternatively, is there a way to make the synthesiser lock more secure when the rig is running with the middle vco on the cw end of 17m? -- 72, Peter G3XJS ( http://www.barville.demon.co.uk/qrpinfo.htm ) From owner-qrp-l@Lehigh.EDU Mon May 19 09:35:58 1997 Received: from fidoii.CC.lehigh.EDU (fidoii.CC.lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.8.5/8.8.5) with ESMTP id JAA14823 for ; Mon, 19 May 1997 09:35:57 -0400 (EDT) Received: from Lehigh.EDU ([127.0.0.1]) by fidoii.cc.Lehigh.EDU with SMTP id <35279-48102>; Mon, 19 May 1997 09:35:16 -0400 Received: from nss2.CC.Lehigh.EDU ([128.180.1.26]) by fidoii.cc.Lehigh.EDU with ESMTP id <35244-48102>; Mon, 19 May 1997 09:33:37 -0400 Received: from tntech.edu (SYSTEM@gemini.tntech.edu [149.149.11.7]) by nss2.CC.Lehigh.EDU (8.8.5/8.8.5) with ESMTP id JAA211117 for ; Mon, 19 May 1997 09:33:31 -0400 Received: from tntech.edu by tntech.edu (PMDF V5.1-8 #16786) id <01IJ1PR9OBF48WW3HK@tntech.edu> for qrp-l@lehigh.edu; Mon, 19 May 1997 08:33:15 CDT Message-Id: <01IJ1PR9QGKY8WW3HK@tntech.edu> Date: Mon, 19 May 1997 08:33:15 -0500 (CDT) Reply-To: JMG@tntech.edu Sender: owner-qrp-l@Lehigh.EDU Precedence: bulk From: "Jeff M. Gold" To: "Low Power Amateur Radio Discussion" Subject: QRP Plus+ help!!! MIME-version: 1.0 Content-type: TEXT/PLAIN; CHARSET=US-ASCII X-VMS-To: IN%"qrp-l@lehigh.edu" X-VMS-Cc: JMG X-Listprocessor-Version: 8.1 beta -- ListProcessor(tm) by CREN Status: RO I am desperately hoping to get some help.. guess my last message this weekend didn't make it to the list. I have a less than 1 year old QRP+ (7/25/96 #1490). I purchased it used. It had not been used very much, and I haven't used it very much. I use only tuned antennas with low SWRs. I just turned the rig on Saturday. Most of the rig seems functional. The computer stuff is all working (memories, keyer) It comes up and shows a frequency of 1.490 (think that was normal). the power/signal strenght meter is all the way to the right on power off, but functions on power up. There seems to be not much getting through the antenna. The receiver sounds the same with, or without an antenna hooked up. No signals getting through. If I key up my 930 with no (very little power) I can clearly hear a signal on the QRP +. I am getting 25 mw out power. Is Bruce still fixing rigs.. or am I completely stuck, any suggestions.. think a diode in the antenna section.. or coil blew? thanks 72 Jeff, AC4HF From owner-qrp-l@Lehigh.EDU Mon May 19 12:58:31 1997 Received: from fidoii.CC.lehigh.EDU (fidoii.CC.lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.8.5/8.8.5) with ESMTP id MAA28042 for ; Mon, 19 May 1997 12:58:30 -0400 (EDT) Received: from Lehigh.EDU ([127.0.0.1]) by fidoii.cc.Lehigh.EDU with SMTP id <35025-19684>; Mon, 19 May 1997 12:58:13 -0400 Received: from nss2.CC.Lehigh.EDU ([128.180.1.26]) by fidoii.cc.Lehigh.EDU with ESMTP id <34941-19684>; Mon, 19 May 1997 12:56:01 -0400 Received: from alpinet.net ([206.26.77.1]) by nss2.CC.Lehigh.EDU (8.8.5/8.8.5) with SMTP id MAA213103 for ; Mon, 19 May 1997 12:55:57 -0400 Received: from sunrise.alpinet.net by alpinet.net (SMI-8.6/SMI-SVR4) id KAA04809; Mon, 19 May 1997 10:57:18 -0600 Message-Id: <33808639.67AD@alpinet.net> Date: Mon, 19 May 1997 10:56:25 -0600 Reply-To: doug@sunrise.alpinet.net Sender: owner-qrp-l@Lehigh.EDU Precedence: bulk From: Doug To: "Low Power Amateur Radio Discussion" Subject: Re: QRP Plus+ help!!! References: <01IJ1PR9QGKY8WW3HK@tntech.edu> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-Mailer: Mozilla 3.0 (Win95; U) X-Listprocessor-Version: 8.1 beta -- ListProcessor(tm) by CREN Status: RO Jeff...sounds like a couple other QRP+'s I've dealt with. Trouble was in the BFO...output dropped way down from the oscillator, de-sensing the rcvr and dumps tx output in the ditch. If you have a good scope, check the output of the BFO at it's entrance point to the top board... should be 50 mhz @ 4 volts P-P. If that's there and good level, next stop is the synthesizer output...also should be around 4 v P-P. Most of the trouble I've seen in the Index Rigs, my own included was due to bad solder joints. But, also found some bad monolithic caps... worked fine for a while and then went open. Also, look betwixt the boards in the mounted configuration, looking for component leads that are long enough to work their way through the white insulator on each level. If the lead's touching the card...cut it back a bit. Ok...try the above and let me know how you do. If the osc outputs are good, then it's time to check out the SBL-1 mixer...they are easily gakked by static and lightning. It takes a good, stable sig gen to work on these little boxes, but you CAN fix 'em. Good Luck 73 Doug, K7YD Livingston, MT Jeff M. Gold wrote: > > I am desperately hoping to get some help.. guess my last message > this weekend didn't make it to the list. > > I have a less than 1 year old QRP+ (7/25/96 #1490). I purchased it > used. It had not been used very much, and I haven't used it very > much. I use only tuned antennas with low SWRs. > > I just turned the rig on Saturday. Most of the rig seems > functional. The computer stuff is all working (memories, keyer) It > comes up and shows a frequency of 1.490 (think that was normal). > > the power/signal strenght meter is all the way to the right on > power off, but functions on power up. > > There seems to be not much getting through the antenna. The > receiver sounds the same with, or without an antenna hooked up. No > signals getting through. If I key up my 930 with no (very little > power) I can clearly hear a signal on the QRP +. I am getting 25 > mw out power. > > Is Bruce still fixing rigs.. or am I completely stuck, any > suggestions.. think a diode in the antenna section.. or coil blew? > > thanks > > 72 > Jeff, AC4HF From owner-qrp-l@Lehigh.EDU Mon May 19 13:57:48 1997 Received: from fidoii.CC.lehigh.EDU (fidoii.CC.lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.8.5/8.8.5) with ESMTP id NAA02612 for ; Mon, 19 May 1997 13:57:47 -0400 (EDT) Received: from Lehigh.EDU ([127.0.0.1]) by fidoii.cc.Lehigh.EDU with SMTP id <35001-19684>; Mon, 19 May 1997 13:57:26 -0400 Received: from nss2.CC.Lehigh.EDU ([128.180.1.26]) by fidoii.cc.Lehigh.EDU with ESMTP id <34832-19684>; Mon, 19 May 1997 13:56:34 -0400 Received: from tntech.edu (SYSTEM@gemini.tntech.edu [149.149.11.7]) by nss2.CC.Lehigh.EDU (8.8.5/8.8.5) with ESMTP id NAA210978 for ; Mon, 19 May 1997 13:56:29 -0400 Received: from tntech.edu by tntech.edu (PMDF V5.1-8 #16786) id <01IJ1Z0SXEG08WW3HK@tntech.edu> for qrp-l@lehigh.edu; Mon, 19 May 1997 12:55:26 CDT Message-Id: <01IJ1Z0SXO368WW3HK@tntech.edu> Date: Mon, 19 May 1997 12:55:26 -0500 (CDT) Reply-To: JMG@tntech.edu Sender: owner-qrp-l@Lehigh.EDU Precedence: bulk From: "Jeff M. Gold" To: "Low Power Amateur Radio Discussion" Subject: Index Labs MIME-version: 1.0 Content-type: TEXT/PLAIN; CHARSET=US-ASCII X-VMS-To: IN%"qrp-l@lehigh.edu" X-VMS-Cc: JMG X-Listprocessor-Version: 8.1 beta -- ListProcessor(tm) by CREN Status: RO anyone know of a good time to reach Bruce at Index via phone. My current understanding is that if you send a rig back for repair.. you will be waiting quite a bit of time. I bit distressing. I was hoping I might get info on what might be wrong with the rig and order parts. Many have emailed me about the mixer problem, but also some others say it probably is not that problem if I can key a nearby tx and hear it on the QRP+. thanks 73 Jeff, AC4HF From owner-qrp-l@Lehigh.EDU Fri May 23 22:23:15 1997 Received: from fidoii.CC.lehigh.EDU (fidoii.CC.lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.8.5/8.8.5) with ESMTP id WAA25991 for ; Fri, 23 May 1997 22:23:14 -0400 (EDT) Received: from Lehigh.EDU ([127.0.0.1]) by fidoii.cc.Lehigh.EDU with SMTP id <35048-46562>; Fri, 23 May 1997 22:21:32 -0400 Received: from nss2.CC.Lehigh.EDU ([128.180.1.26]) by fidoii.cc.Lehigh.EDU with ESMTP id <34875-41952>; Fri, 23 May 1997 22:20:36 -0400 Received: from telepath.com (root@zoom1.telepath.com [205.228.200.20]) by nss2.CC.Lehigh.EDU (8.8.5/8.8.5) with ESMTP id WAA155468 for ; Fri, 23 May 1997 22:20:27 -0400 Received: from p5-200 (zoom2130.telepath.com [205.228.192.130]) by telepath.com (8.8.5/8.7.3) with SMTP id VAA29501 for ; Fri, 23 May 1997 21:22:48 -0500 (CDT) Message-Id: <1.5.4.32.19970524021908.006a3798@telepath.com> Date: Fri, 23 May 1997 21:19:08 -0500 Reply-To: dwhite@telepath.com Sender: owner-qrp-l@Lehigh.EDU Precedence: bulk From: David White To: "Low Power Amateur Radio Discussion" Subject: QRP+ Keying Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" X-Sender: dwhite@telepath.com X-Mailer: Windows Eudora Light Version 1.5.4 (32) X-Listprocessor-Version: 8.1 beta -- ListProcessor(tm) by CREN Status: RO I am looking for info on successful cures of chirpy CW keying on a QRP+ which has been upgraded with new boards and EPROM. Serial number on my unit is #508. I had never taken time to monitor keying of the QRP+ with a seperate receiver (since getting it back from the upgrade) until a few weeks ago. I was disappointed to hear a slight chirp.....not real bad, but definitely there. It is interesting to note that the keying will clean up by switching to RIT or SPLIT operation. I have seen information about a mod to clean up keying on a QRP+ which has been upgraded with an EPROM, but have not seen anything pertaining to a QRP+ with a complete upgrade. It appears the LO boards are the same in both the new and old QRP+. One of the mods I have seen recommended changing a couple of capacitors in the PLL on the LO board. Has anyone succesfully cured a QRP+ with the symptoms I have described? I have attempted to talk with Bruce at Index Labs, but so far haven't got past his answering machine. Dave N5DW **************************************************************** * David W. White dwhite@telepath.com * * N5DW Norman, Oklahoma 73072 * **************************************************************** From owner-qrp-l@Lehigh.EDU Wed May 28 09:15:38 1997 Received: from fidoii.CC.lehigh.EDU (fidoii.CC.lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.8.5/8.8.5) with ESMTP id JAA06085 for ; Wed, 28 May 1997 09:15:36 -0400 (EDT) Received: from Lehigh.EDU ([127.0.0.1]) by fidoii.cc.Lehigh.EDU with SMTP id <34923-42502>; Wed, 28 May 1997 09:15:07 -0400 Received: from nss2.CC.Lehigh.EDU ([128.180.1.26]) by fidoii.cc.Lehigh.EDU with ESMTP id <34899-2564>; Wed, 28 May 1997 09:14:08 -0400 Received: from tntech.edu (SYSTEM@gemini.tntech.edu [149.149.11.7]) by nss2.CC.Lehigh.EDU (8.8.5/8.8.5) with ESMTP id JAA42865 for ; Wed, 28 May 1997 09:13:53 -0400 Received: from tntech.edu by tntech.edu (PMDF V5.1-8 #16786) id <01IJE9LRWIME8WWEHX@tntech.edu> for qrp-l@lehigh.edu; Wed, 28 May 1997 08:13:14 CDT Message-Id: <01IJE9LRWIMG8WWEHX@tntech.edu> Date: Wed, 28 May 1997 08:13:14 -0500 (CDT) Reply-To: JMG@tntech.edu Sender: owner-qrp-l@Lehigh.EDU Precedence: bulk From: "Jeff M. Gold" To: "Low Power Amateur Radio Discussion" Subject: QRP+ - fix-the adventure MIME-version: 1.0 Content-type: TEXT/PLAIN; CHARSET=US-ASCII X-VMS-To: IN%"qrp-l@lehigh.edu" X-VMS-Cc: JMG X-Listprocessor-Version: 8.1 beta -- ListProcessor(tm) by CREN Status: RO Well Conard Murray, WS4S, famed ham radio photographer came over last night to help me work on my QRP++ I am thoroughly disgusted with Index.. doesn't return Faxes or phone.. great guy... buy a $700 radio and get left hangin in the wind.. sure want to do business real soon with him and his new ventures. well by the time Conard came over it was into the evening and we were both a bit tired.. first mistake. I took the top board off and we decided since I had an extra SBL-1 that it was probably just as quick to replace the one on the board as to test it out. Well I hope someone will let me know how they got the mixer off the board.. we tried for some time and couldn't .. we ended up cutting the metal case and cleaning it out and soldering directly to the legs. Well.. still can go back and correct that.. then realized by looking at the schematic that it couldn't be the SBL-1.. it is part of the receive only section.. and I was having transmit problems. Next we found the Index Mixer (yes the new one and it blows quite easily also). just cut the case.. cleaned out all the sticky stuff and soldered another SBL-1 on top. We looked at Larry East's protection mod and noticed that the component numnbers didn't match my QRP+ Conard ended up putting the mod in the holes marked ?? VR1??? something like that. the receive works fine now and get transmit power on all bands but as you go to the lower bands you get less power. I only get about 3 on bands down to I think 30 meters and then less than 1 watt with a good match on the antenna. I would guess I need to get hold of a direct replacement? have to work on that. hope there is another source other than Index. still like help in finding out how to get the mixers off the board.. are they epoxied thanks 72 Jeff, AC4HF From owner-qrp-l@Lehigh.EDU Wed May 28 12:00:46 1997 Received: from fidoii.CC.lehigh.EDU (fidoii.CC.lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.8.5/8.8.5) with ESMTP id MAA15064 for ; Wed, 28 May 1997 12:00:45 -0400 (EDT) Received: from Lehigh.EDU ([127.0.0.1]) by fidoii.cc.Lehigh.EDU with SMTP id <34963-2564>; Wed, 28 May 1997 12:00:23 -0400 Received: from nss2.CC.Lehigh.EDU ([128.180.1.26]) by fidoii.cc.Lehigh.EDU with ESMTP id <34832-42502>; Wed, 28 May 1997 11:59:27 -0400 Received: from tntech.edu (gemini.tntech.edu [149.149.11.7]) by nss2.CC.Lehigh.EDU (8.8.5/8.8.5) with ESMTP id LAA117799 for ; Wed, 28 May 1997 11:57:15 -0400 Received: from tntech.edu by tntech.edu (PMDF V5.1-8 #16786) id <01IJEFFGKQYU8WWF83@tntech.edu> for qrp-l@lehigh.edu; Wed, 28 May 1997 10:53:44 CDT Message-Id: <01IJEFFGKQYW8WWF83@tntech.edu> Date: Wed, 28 May 1997 10:53:44 -0500 (CDT) Reply-To: JMG@tntech.edu Sender: owner-qrp-l@Lehigh.EDU Precedence: bulk From: "Jeff M. Gold" To: "Low Power Amateur Radio Discussion" Subject: index mixer replacement MIME-version: 1.0 Content-type: TEXT/PLAIN; CHARSET=US-ASCII X-VMS-To: IN%"qrp-l@lehigh.edu" X-VMS-Cc: JMG X-Listprocessor-Version: 8.1 beta -- ListProcessor(tm) by CREN Status: RO Anyone know the number or other info on getting a mixer replacement for the QRP++? thanks 72 Jeff, AC4HF From owner-qrp-l@Lehigh.EDU Wed May 28 12:28:58 1997 Received: from fidoii.CC.lehigh.EDU (fidoii.CC.lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.8.5/8.8.5) with ESMTP id MAA16851 for ; Wed, 28 May 1997 12:28:57 -0400 (EDT) Received: from Lehigh.EDU ([127.0.0.1]) by fidoii.cc.Lehigh.EDU with SMTP id <34993-2564>; Wed, 28 May 1997 12:28:41 -0400 Received: from nss2.CC.Lehigh.EDU ([128.180.1.26]) by fidoii.cc.Lehigh.EDU with ESMTP id <34986-42502>; Wed, 28 May 1997 12:28:21 -0400 Received: from zia.aoc.nrao.edu (zia.aoc.nrao.edu [146.88.1.4]) by nss2.CC.Lehigh.EDU (8.8.5/8.8.5) with SMTP id MAA104359 for ; Wed, 28 May 1997 12:28:10 -0400 Received: (from pharden@localhost) by zia.aoc.nrao.edu (8.6.12/8.6.10) id KAA12933 for qrp-l@lehigh.edu; Wed, 28 May 1997 10:28:07 -0600 Message-Id: <199705281628.KAA12933@zia.aoc.nrao.edu> Date: Wed, 28 May 1997 10:28:07 -0600 Reply-To: pharden@aoc.nrao.edu Sender: owner-qrp-l@Lehigh.EDU Precedence: bulk From: Paul Harden To: "Low Power Amateur Radio Discussion" Subject: SBL-1/SRA-1 Mixer Replacement X-Listprocessor-Version: 8.1 beta -- ListProcessor(tm) by CREN Status: RO First ... I don't own a QRP+ and therefore not aware if there is any particular problem or sensitivity with the mixer. Doesn't it use the MiniCircuits passive mixer, such as the SRA or SBL series? My comment is simply that we must have a thousand SRA and SBL mixers in the LO and IF system here at the VLA observatory. Most of the IF modules were built in the late 1970's and early 1980's. Short of momentary power failures, they have been energized now for pushing 20 years. Some are located in the vertex room under the dishes, exposed to very hot to extremely cold conditions and extreme vibration. I HAVE ONLY SEEN 2-3 FAILURES OF THESE DEVICES in my 20 years working here ... and that was due to the antennas getting hit by lightning, and one unknown failure. These are Level 7 passive mixers, meaning they are designed for an LO input of +7dBm and the RF input port rated at +1dBm. This RF spec (+1dBm) is for the guaranteed port-to-port isolation, not when it destroys. Still, QRP front-end receivers just don't see that kind of power on the RF port. (+1dBm is 250mVrms, while a booming S9 signal is still only 50uV). I could be wrong, but I find it hard to believe so many of these passive mixers can be going bad from my experience. Instead, I would suspect the LO drive. It needs to be around +5 to +7dBm of LO power (at least 100mVrms = 300mVpp), which is significant. Before replacing an SRA or SBL mixer, ensure you have GOBS of LO drive power. Much less than the +7dBm, the internal diodes just aren't biased on to perform any mixing action. It will appear like a dead mixer. I'd be interested if anyone has truly found a bad SRA/SBL mixer. My experience is they are almost bullet proof (but not lightning proof -hi). GL, Paul NA5N ----NATIONAL RADIO ASTRONOMY OBSERVATORY ----- Socorro, New Mexico ----- | VLA - Very Large Array Observatory - Worlds largest radio telescope | |VLBA - Very Long Baseline Array - even larger | --------(pharden@zia.aoc.nrao.edu) --- (73 de NA5N) -------------------- From owner-qrp-l@Lehigh.EDU Wed May 28 14:16:40 1997 Received: from boss.cs.OhioU.Edu (root@boss.cs.ohiou.edu [132.235.1.1]) by oucsace.cs.ohiou.edu (8.8.5/8.8.5) with ESMTP id OAA23004 for ; Wed, 28 May 1997 14:16:34 -0400 (EDT) Received: from fidoii.CC.lehigh.EDU (fidoii.CC.lehigh.EDU [128.180.1.4]) by boss.cs.OhioU.Edu (8.8.5/8.8.5) with ESMTP id OAA12198 for ; Wed, 28 May 1997 14:16:32 -0400 (EDT) Received: from Lehigh.EDU ([127.0.0.1]) by fidoii.cc.Lehigh.EDU with SMTP id <35001-49928>; Wed, 28 May 1997 14:14:52 -0400 Received: from nss2.CC.Lehigh.EDU ([128.180.1.26]) by fidoii.cc.Lehigh.EDU with ESMTP id <34991-49928>; Wed, 28 May 1997 14:14:04 -0400 Received: from tntech.edu (SYSTEM@gemini.tntech.edu [149.149.11.7]) by nss2.CC.Lehigh.EDU (8.8.5/8.8.5) with ESMTP id OAA117842 for ; Wed, 28 May 1997 14:13:58 -0400 Received: from tntech.edu by tntech.edu (PMDF V5.1-8 #16786) id <01IJEK6TNF8G8WWF83@tntech.edu> for qrp-l@lehigh.edu; Wed, 28 May 1997 13:13:57 CDT Message-Id: <01IJEK6TNOVM8WWF83@tntech.edu> Date: Wed, 28 May 1997 13:13:56 -0500 (CDT) Reply-To: JMG@tntech.edu Sender: owner-qrp-l@Lehigh.EDU Precedence: bulk From: "Jeff M. Gold" To: "Low Power Amateur Radio Discussion" Subject: bad mixers exist MIME-version: 1.0 Content-type: TEXT/PLAIN; CHARSET=US-ASCII X-VMS-To: IN%"qrp-l@lehigh.edu" X-VMS-Cc: JMG X-Listprocessor-Version: 8.1 beta -- ListProcessor(tm) by CREN Status: RO Well in comment to Paul's posting: One of my first kits was the HW9. I built it carefully. Got it done and did the recommended resistance checks.. all ok. Powered it up and got most of it aligned.. no receive. I have a friend that knows a thing or two about radios. I traded him a 6 meter beam for locating the radio's problem. He got to a point checking it and said he thought it was the mixer (think it is also a SBL-1). Got on the phone the next day to the Heath techs. They pretty much said what Paul did.. impossible.. no such thing as a bad mixer. The dude came back the next evening with a homebuilt QRP transceiver, ugly contruction with a SBL-1 epoxied to the board. He pried it off, and put it in the HW9. Everything came to life. Now lets get real. No matter what part the part is in any manufactured item, them manufacture them with a % allowance for defective ones. mathematically even if that % is low, means that some one out there gets a defective part. the mixer in my QRP+ was bad, or evil magic exhists. The rig had almost no receive or Transmit, then soldered in a SBL-1 for the Index mixer, and the receiver works fine. the tx is still a little buggy. think I need a direct replacement. 72 Jeff From owner-qrp-l@Lehigh.EDU Wed May 28 15:30:59 1997 Received: from fidoii.CC.lehigh.EDU (fidoii.CC.lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.8.5/8.8.5) with ESMTP id PAA00438 for ; Wed, 28 May 1997 15:30:58 -0400 (EDT) Received: from Lehigh.EDU ([127.0.0.1]) by fidoii.cc.Lehigh.EDU with SMTP id <34935-2564>; Wed, 28 May 1997 15:29:00 -0400 Received: from nss2.CC.Lehigh.EDU ([128.180.1.26]) by fidoii.cc.Lehigh.EDU with ESMTP id <34907-42502>; Wed, 28 May 1997 15:26:49 -0400 Received: from mail.atl.bellsouth.net (mail.atl.bellsouth.net [205.152.0.21]) by nss2.CC.Lehigh.EDU (8.8.5/8.8.5) with ESMTP id PAA38784 for ; Wed, 28 May 1997 15:26:41 -0400 Received: from n4xy (host-207-53-2-33.atl.bellsouth.net [207.53.2.33]) by mail.atl.bellsouth.net (8.8.5/8.8.5) with SMTP id PAA29880; Wed, 28 May 1997 15:26:25 -0400 (EDT) Message-Id: <3.0.1.32.19970528152636.009ad310@mail.atl.bellsouth.net> Date: Wed, 28 May 1997 15:26:36 -0400 Reply-To: n4xy@bellsouth.net Sender: owner-qrp-l@Lehigh.EDU Precedence: bulk From: Ed Tanton To: "Low Power Amateur Radio Discussion" Subject: Re: QRP+ - fix-the adventure In-Reply-To: <01IJE9LRWIMG8WWEHX@tntech.edu> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" X-To: JMG@tntech.edu X-Cc: "Low Power Amateur Radio Discussion" X-Sender: n4xy@mail.atl.bellsouth.net X-Mailer: Windows Eudora Pro Version 3.0.1 (32) X-Listprocessor-Version: 8.1 beta -- ListProcessor(tm) by CREN Status: RO Does anyone have the slightest idea why the mixer was epoxied down-as a manufacturing procedure???? 72/73 __________________________________________________________ Ed Tanton N4XY EMAIL: n4xy@bellsouth.net 189 Pioneer Trail Marietta, GA 30068-3466 TEL: (770)579-3933 V/MBX/FAX __________________________________________________________ QRP-ARCI #7663 G-QRP #6779 OK-QRP #172 QRP-L #758 AdvRC #140 NORCAL #1779 NCDXF SEDXC Life Member: ARRL AMSAT INDEXA QCWA __________________________________________________________ INTERESTS: DX QRP BoatAnchors Test Equipment Photography CW: 99.9% QRP: 95-100% (Mood swings!) Mercury Paddle #0214 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ "Think you can, think you can't: either way you're right!" Henry Ford ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ From owner-qrp-l@Lehigh.EDU Wed May 28 17:33:56 1997 Received: from fidoii.CC.lehigh.EDU (fidoii.CC.lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.8.5/8.8.5) with ESMTP id RAA08559 for ; Wed, 28 May 1997 17:33:55 -0400 (EDT) Received: from Lehigh.EDU ([127.0.0.1]) by fidoii.cc.Lehigh.EDU with SMTP id <35097-49928>; Wed, 28 May 1997 17:32:32 -0400 Received: from nss2.CC.Lehigh.EDU ([128.180.1.26]) by fidoii.cc.Lehigh.EDU with ESMTP id <34840-49928>; Wed, 28 May 1997 17:32:01 -0400 Received: from tntech.edu (SYSTEM@gemini.tntech.edu [149.149.11.7]) by nss2.CC.Lehigh.EDU (8.8.5/8.8.5) with ESMTP id RAA117909 for ; Wed, 28 May 1997 17:31:58 -0400 Received: from tntech.edu by tntech.edu (PMDF V5.1-8 #16786) id <01IJER2I6KKG8WWKT2@tntech.edu> for qrp-l@lehigh.edu; Wed, 28 May 1997 16:27:21 CDT Message-Id: <01IJER2I6U7M8WWKT2@tntech.edu> Date: Wed, 28 May 1997 16:27:21 -0500 (CDT) Reply-To: JMG@tntech.edu Sender: owner-qrp-l@Lehigh.EDU Precedence: bulk From: "Jeff M. Gold" To: "Low Power Amateur Radio Discussion" Subject: Index MIME-version: 1.0 Content-type: TEXT/PLAIN; CHARSET=US-ASCII X-VMS-To: IN%"qrp-l@lehigh.edu" X-VMS-Cc: JMG X-Listprocessor-Version: 8.1 beta -- ListProcessor(tm) by CREN Status: RO To be fair, I just did get a response (thanks to Ti, W5FN) from index and will be able to order a replacement mixer... still didn't get a response to my original inquiries about help with the problem. think I may order an extra one just to be sure 72 Jeff From owner-qrp-l@Lehigh.EDU Wed May 28 17:38:26 1997 Received: from fidoii.CC.lehigh.EDU (fidoii.CC.lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.8.5/8.8.5) with ESMTP id RAA08814 for ; Wed, 28 May 1997 17:38:23 -0400 (EDT) Received: from Lehigh.EDU ([127.0.0.1]) by fidoii.cc.Lehigh.EDU with SMTP id <35114-42502>; Wed, 28 May 1997 17:38:04 -0400 Received: from nss2.CC.Lehigh.EDU ([128.180.1.26]) by fidoii.cc.Lehigh.EDU with ESMTP id <35106-2564>; Wed, 28 May 1997 17:36:31 -0400 Received: from italy.it.earthlink.net ([204.250.46.18]) by nss2.CC.Lehigh.EDU (8.8.5/8.8.5) with ESMTP id RAA92834 for ; Wed, 28 May 1997 17:36:27 -0400 Received: from 207.217.21.108 (pool033-max5.pasadena-ca-us.dialup.earthlink.net [207.217.21.108]) by italy.it.earthlink.net (8.8.5/8.8.5) with SMTP id OAA25995; Wed, 28 May 1997 14:36:08 -0700 (PDT) Message-Id: <338CA573.6DAA@earthlink.net> Date: Wed, 28 May 1997 14:36:44 -0700 Reply-To: kjlopez@earthlink.net Sender: owner-qrp-l@Lehigh.EDU Precedence: bulk From: Ken Lopez To: "Low Power Amateur Radio Discussion" Subject: Re: Index References: <01IJER2I6U7M8WWKT2@tntech.edu> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-To: JMG@tntech.edu X-Cc: Low Power Amateur Radio Discussion X-Mailer: Mozilla 3.01Gold (Macintosh; I; 68K) X-Listprocessor-Version: 8.1 beta -- ListProcessor(tm) by CREN Status: RO Jeff, For us Index owners, how much is the mixer in the ++, and what is the model #? Thanks, Ken, N6TZV From owner-qrp-l@Lehigh.EDU Wed May 28 18:48:40 1997 Received: from fidoii.CC.lehigh.EDU (fidoii.CC.lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.8.5/8.8.5) with ESMTP id SAA12709 for ; Wed, 28 May 1997 18:48:39 -0400 (EDT) Received: from Lehigh.EDU ([127.0.0.1]) by fidoii.cc.Lehigh.EDU with SMTP id <35151-42502>; Wed, 28 May 1997 18:45:33 -0400 Received: from nss2.CC.Lehigh.EDU ([128.180.1.26]) by fidoii.cc.Lehigh.EDU with ESMTP id <35126-49928>; Wed, 28 May 1997 18:44:35 -0400 Received: from eloi.inel.gov ([204.134.135.13]) by nss2.CC.Lehigh.EDU (8.8.5/8.8.5) with ESMTP id SAA201537 for ; Wed, 28 May 1997 18:44:32 -0400 Received: from pc-lve1 ([134.20.176.115]) by eloi.inel.gov (post.office MTA v2.0 0813 ID# 0-12374) with SMTP id AAA5470; Wed, 28 May 1997 16:44:56 -0600 Message-Id: <2.2.16.19970528224349.1c37e6ac@eloi> Date: Wed, 28 May 1997 16:43:49 -0600 Reply-To: w1hue@amsat.org Sender: owner-qrp-l@Lehigh.EDU Precedence: bulk From: Larry East To: "Low Power Amateur Radio Discussion" Subject: QRP++/QRP+ Mixers Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" X-Cc: JMG@tntech.edu X-Sender: lve1@eloi X-Mailer: Windows Eudora Pro Version 2.2 (16) X-Listprocessor-Version: 8.1 beta -- ListProcessor(tm) by CREN Status: RO >From Paul, NA5N: >I could be wrong, but I find it hard to believe so many of these >passive mixers can be going bad from my experience. Instead, I >would suspect the LO drive. It needs to be around +5 to +7dBm of >LO power (at least 100mVrms = 300mVpp), which is significant. >Before replacing an SRA or SBL mixer, ensure you have GOBS of >LO drive power. Much less than the +7dBm, the internal diodes >just aren't biased on to perform any mixing action. It will >appear like a dead mixer. > Well, I lost TWO SBL-1 mixers in my QRP+ before I added some diodes to protect it from static discharges coming from the antenna. Yes, those &$#@! things are damn near impossible to remove without ruining something (either the mixer itself, the board, or both)!! The problem is the plated through holes and the big heat sink provided by the ground-plane on the bottom of the board. In the QRP++, both mixers are active during receive and transmit. In the QRP+, only the first mixer is used for both, the second one (near the front right edge of the board) is used in receive only (product detector). The front-end mixer in the QRP++ is a proprietary "new improved" version that apparently will take more of a beating than the SBL-1. In my opinion, the claim made by Index that this mixer is the "heart of the more sensitive receiver" in the QRP++ is pure BS. As far as I can tell, the improved S/N of the QRP++ relative to the QRP+ (original version using an SBL-1) is primarily due to the use of shielded inductors for the input LP filter. A SBL-1 (or equivalent) should work just fine in the QRP++. Why Jeff saw his power drop off on the lower bands is a mystery to me -- but Paul's suggestion to check the LO output is a good place to start. 72 and good luck, Larry W1HUE/7 From owner-qrp-l@Lehigh.EDU Thu May 29 00:56:12 1997 Received: from fidoii.CC.lehigh.EDU (fidoii.CC.lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.8.5/8.8.5) with ESMTP id AAA29671 for ; Thu, 29 May 1997 00:56:11 -0400 (EDT) Received: from Lehigh.EDU ([127.0.0.1]) by fidoii.cc.Lehigh.EDU with SMTP id <34933-9782>; Thu, 29 May 1997 00:55:46 -0400 Received: from nss2.CC.Lehigh.EDU ([128.180.1.26]) by fidoii.cc.Lehigh.EDU with ESMTP id <34913-19260>; Thu, 29 May 1997 00:54:32 -0400 Received: from mtigwc04.worldnet.att.net (mailhost.worldnet.att.net [204.127.131.33]) by nss2.CC.Lehigh.EDU (8.8.5/8.8.5) with ESMTP id AAA168557 for ; Thu, 29 May 1997 00:54:26 -0400 Received: from Prgobrick ([207.146.202.97]) by mtigwc04.worldnet.att.net (post.office MTA v2.0 0613 ) with SMTP id AAA18366; Thu, 29 May 1997 04:53:54 +0000 Message-Id: <3.0.32.19970528235235.00c377a0@postoffice.worldnet.att.net> Date: Wed, 28 May 1997 23:52:43 -0500 Reply-To: rgobrick@worldnet.att.net Sender: owner-qrp-l@Lehigh.EDU Precedence: bulk From: "Robert J. Gobrick" To: "Low Power Amateur Radio Discussion" Subject: Re:bad mixers exist Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" X-To: "Jeff M. Gold" , Paul Harden , qrp-l@Lehigh.EDU X-Sender: rgobrick@postoffice.worldnet.att.net X-Mailer: Windows Eudora Pro Version 3.0 (32) X-Listprocessor-Version: 8.1 beta -- ListProcessor(tm) by CREN Status: RO Jeff, Paul and QRP-L Gang, I've been following the thread on Jeff's "blown" SBL-1 on his Index Lab QRP+. Having owned a QRP+ and having had it back to the factory twice back in the early days before I returned it to the factory for it's final stay (I was refunded my purchase) I will have to go along with Jeff's hunch that it was a blown SBL-1 that was the problem. For what ever reason Index Labs had a design problem which I was never able to understand with SOME of the SBL-1 mixers and SOME of the QRP+ rigs. The feedback that I got was that the problem was a static discharge off of my long wire antenna that took out my first SBL-1. Index suggested at that time that they were looking into a mini gas discharge protection circuit. But I suspect what it really turned out to be was a timing problem in T/R switching circuit that "allowed" some high level (5 W) RF to reach the mixer and fry it (Larry East- is that possible). I believe this is what happened on my second visit back to the factory since I "lost" it during a turn-over to a station I was talking to (ever wonder why someone you talk to on CW just disappears - hi). Anyway WE do know that the QRP++ went to a hardier mixer (Synergy Microwave Corp) to overcome the "dessert storm" effect but I was never comfortable that everything was still OK. I will have to say that I have talked to many QRP+ owners who have never had a problem and are happy campers. And I also have to say that I have experienced the static discharge problem in the past with other rigs - I used to wonder why I would see a little light coming out of my turned-off Icom R-71 receiver - turned out Icom had a little neon discharge bulb across the antenna input that would "glow" during stormy weather.. if I only knew what that was ... Also when I was in Newfoundland I used to hear my MFJ tuner make popping noises which I account to the dry "ion" charged storm winds blowing across my long wire - neat sound ..pop..pop...pop (never did want to look inside - hi) Anyway Jeff, I think you and your friend solved your problem by replacing the SBL-1. But I won't guarantee that the problem won't happen again - Follow the advice that Larry East W1HUE writes in his two part QRP ARCI QRP Quarterly article for QRP+ mods. Also Paul, I was wondering if you guys in that nice dry climate in New Mexico experience any of the "desert storm" static problems. When I had a 5/8 wave vertical mounted on top of my VW Van tied into my old Icom IC-27 two meter rig and after a few hours of high speed driving in the VW (oxymoron) I would get so much de-sense to the rig that the only cure would be to stop (easy to do in a VW) and go out and short (discharge) the Larson whip to the Van body to start afresh. Enough rambling - cheers 73/72 Bob N0EB ____________________________________________________________________ | PLEASE NOTE NEW EMAIL ADDRESSES - PLEASE REPLY TO BOTH ADDRESSES | | | | Bob Gobrick - N0EB & VO1DRB (ex WA6ERB, VE2DRB) Stillwater, MN | | Internet: rgob@tco.infonet.com | | AND Internet: rgobrick@worldnet.att.com | |____________________________________________________________________| From owner-qrp-l@Lehigh.EDU Thu May 29 09:05:59 1997 Received: from fidoii.CC.lehigh.EDU (fidoii.CC.lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.8.5/8.8.5) with ESMTP id JAA25125 for ; Thu, 29 May 1997 09:05:58 -0400 (EDT) Received: from Lehigh.EDU ([127.0.0.1]) by fidoii.cc.Lehigh.EDU with SMTP id <34906-9782>; Thu, 29 May 1997 09:05:35 -0400 Received: from nss2.CC.Lehigh.EDU ([128.180.1.26]) by fidoii.cc.Lehigh.EDU with ESMTP id <34829-19260>; Thu, 29 May 1997 09:04:09 -0400 Received: from tntech.edu (SYSTEM@gemini.tntech.edu [149.149.11.7]) by nss2.CC.Lehigh.EDU (8.8.5/8.8.5) with ESMTP id JAA42771 for ; Thu, 29 May 1997 09:03:57 -0400 Received: from tntech.edu by tntech.edu (PMDF V5.1-8 #16786) id <01IJFNNOJ0RK8WWOMJ@tntech.edu> for qrp-l@lehigh.edu; Thu, 29 May 1997 08:03:24 CDT Message-Id: <01IJFNNOJ0RM8WWOMJ@tntech.edu> Date: Thu, 29 May 1997 08:03:24 -0500 (CDT) Reply-To: JMG@tntech.edu Sender: owner-qrp-l@Lehigh.EDU Precedence: bulk From: "Jeff M. Gold" To: "Low Power Amateur Radio Discussion" Subject: blown mixer4 MIME-version: 1.0 Content-type: TEXT/PLAIN; CHARSET=US-ASCII X-VMS-To: IN%"qrp-l@lehigh.edu" X-VMS-Cc: JMG X-Listprocessor-Version: 8.1 beta -- ListProcessor(tm) by CREN Status: RO well, I have the QRP++ which had the new "beafier" synergy mixer. the facts: the rig wasn't working. replaced the synergy with a SBL-1. worked Oshkosh for quite a while on 40 meters with less than a watt this morning. think scientific evidence point to the FACT that the mixer was the problem, since it is the only part we touched. still have two problems. we couldn't get the old mixer out.. so just took the top off the synergy and soldered to the top legs. Really don't think this made much of a difference. Not sure if this is electronically possible, but having worked on many problems on qrp tranceivers (mostly from blowing things up in them), I would guess it is. I didn't have a replacement synergy, so stuck in a SBL-1. The power output is now lower on all bands. 3 watts down till 40. From 40 it starts to go under 1 watt. guess I should get hold of a synergy mixer ($25) from Index. 72 Jeff, AC4HF From owner-qrp-l@lehigh.edu Thu May 29 11:24:52 1997 Received: from fidoii.CC.lehigh.EDU (fidoii.CC.lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.8.5/8.8.5) with ESMTP id LAA05403 for ; Thu, 29 May 1997 11:24:34 -0400 (EDT) Received: from Lehigh.EDU ([127.0.0.1]) by fidoii.cc.Lehigh.EDU with SMTP id <34907-24634>; Thu, 29 May 1997 11:23:55 -0400 Received: from nss2.CC.Lehigh.EDU ([128.180.1.26]) by fidoii.cc.Lehigh.EDU with ESMTP id <34884-19260>; Thu, 29 May 1997 11:22:08 -0400 Received: from mail.atl.bellsouth.net (mail.atl.bellsouth.net [205.152.0.21]) by nss2.CC.Lehigh.EDU (8.8.5/8.8.5) with ESMTP id LAA77524 for ; Thu, 29 May 1997 11:22:05 -0400 Received: from n4xy (host-207-53-3-189.atl.bellsouth.net [207.53.3.189]) by mail.atl.bellsouth.net (8.8.5/8.8.5) with SMTP id LAA08453; Thu, 29 May 1997 11:21:48 -0400 (EDT) Message-Id: <3.0.1.32.19970529112159.009b3320@mail.atl.bellsouth.net> Date: Thu, 29 May 1997 11:21:59 -0400 Reply-To: n4xy@bellsouth.net Sender: owner-qrp-l@lehigh.edu Precedence: bulk From: Ed Tanton To: "Low Power Amateur Radio Discussion" Subject: Epoxied mixer removal In-Reply-To: <01IJFNNOJ0RM8WWOMJ@tntech.edu> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" X-To: JMG@tntech.edu X-Cc: "Low Power Amateur Radio Discussion" X-Sender: n4xy@mail.atl.bellsouth.net X-Mailer: Windows Eudora Pro Version 3.0.1 (32) X-Listprocessor-Version: 8.1 beta -- ListProcessor(tm) by CREN Status: RO The weakest axis for epoxy and super glue is in their shear strength. If you will edge a sharpened blade (old screwdriver works well) under one end, and pry upward, usually the object will pop off. You *may* have to chisel it with a small mallet/etc. This may be a problem only if the mfgr has prepared the surface before application by roughening/scoring it-especially if the had some holes drilled and it filled those to the other side. (In that case I would drill through them first.) This all sounds violent-but the object is to remove the object-not save it. If the object is soldered in you obviously must remove the solder first-thoroughly. If there are plated-thru holes I would not trust them afterwards and would place Z-wires in each hole (a #30 fine wire to replace the plating.) Remember, if you want to remove an IC that is soldered down, forget the IC: cut it out, and desolder the remaining pins one at a time. The important point here is to not damage the pcb... you can buy another IC. In the case of a metal-can-type object that's a problem. You just have to desolder and then do the best you can. I cannot emphasize enough the value of desoldering braid for this job. And cut the used length off after each attempt. It contains flux, and using it once uses the flux. If the p-t-hole is large enough, a solder-sucker may do the job, but I prefer braid for smaller or tighter clearance holes. Of course, if you have a Pace (Desoldering Station)... you can just heat and slurp. I rarely use mine however-preferring to just plunge ahead with what I have setup and use braid. I'm REALLY curious about why these guys were expoxied down. People don't waste manufacturing steps, therefore there must have been some reason in Bruce's mind, and I don't believe it was just to hold the thing down. I wonder if you could get some kind of microphonics through the mixer? Seems to me like RTV would have been a better choice for that. (Sometimes SMT parts are sort of glued down-but not with epoxy-and the mixer wasn't SMT-as I understand it... correct me if I'm wrong about that someone.) 72/73 __________________________________________________________ Ed Tanton N4XY EMAIL: n4xy@bellsouth.net 189 Pioneer Trail Marietta, GA 30068-3466 TEL: (770)579-3933 V/MBX/FAX __________________________________________________________ QRP-ARCI #7663 G-QRP #6779 OK-QRP #172 QRP-L #758 AdvRC #140 NORCAL #1779 NCDXF SEDXC Life Member: ARRL AMSAT INDEXA QCWA __________________________________________________________ INTERESTS: DX QRP BoatAnchors Test Equipment Photography CW: 99.9% QRP: 95-100% (Mood swings!) Mercury Paddle #0214 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ "Think you can, think you can't: either way you're right!" Henry Ford ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ From owner-qrp-l@Lehigh.EDU Thu May 29 13:31:19 1997 Received: from fidoii.CC.lehigh.EDU (fidoii.CC.lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.8.5/8.8.5) with ESMTP id NAA15552 for ; Thu, 29 May 1997 13:31:17 -0400 (EDT) Received: from Lehigh.EDU ([127.0.0.1]) by fidoii.cc.Lehigh.EDU with SMTP id <34866-19260>; Thu, 29 May 1997 13:30:36 -0400 Received: from nss2.CC.Lehigh.EDU ([128.180.1.26]) by fidoii.cc.Lehigh.EDU with ESMTP id <34834-24634>; Thu, 29 May 1997 13:29:25 -0400 Received: from feta.direct.ca (feta.direct.ca [199.60.229.5]) by nss2.CC.Lehigh.EDU (8.8.5/8.8.5) with ESMTP id NAA79712 for ; Thu, 29 May 1997 13:29:24 -0400 Received: from libertine (van-52-0228.direct.ca [204.174.240.76]) by feta.direct.ca (8.8.5/8.8.0) with SMTP id KAA14722; Thu, 29 May 1997 10:28:05 -0700 (PDT) Message-Id: <338DBC0C.2E9961B5@direct.ca> Date: Thu, 29 May 1997 10:25:32 -0700 Reply-To: ve7ldh@direct.ca Sender: owner-qrp-l@Lehigh.EDU Precedence: bulk From: laura halliday To: "Low Power Amateur Radio Discussion" Subject: Re: Epoxied mixer removal References: <3.0.1.32.19970529112159.009b3320@mail.atl.bellsouth.net> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-Sender: laura@feta.direct.ca X-To: n4xy@bellsouth.net X-Cc: Low Power Amateur Radio Discussion X-Mailer: Mozilla 3.01 (X11; I; Linux 2.0.27 i486) X-Listprocessor-Version: 8.1 beta -- ListProcessor(tm) by CREN Status: RO Ed Tanton wrote: > (snip) > I'm REALLY curious about why these guys were expoxied down. > People don't waste manufacturing steps, therefore there > must have been some reason in Bruce's mind, and I don't > believe it was just to hold the thing down. I wonder if > you could get some kind of microphonics through the mixer? Seems > to me like RTV would have been a better choice for that. > (Sometimes SMT parts are sort of glued down-but not with > epoxy-and the mixer wasn't SMT-as I understand it... correct > me if I'm wrong about that someone.) SBL and SRA series mixers are leaded affairs, little metal blocks with 8 leads coming out the bottom. Similar mixers in surface mount packages include the JMS and TUF series. I've played with JMS-1 mixers, which perform very much like SBL-1s. Except that they cost less and are half the size. TUF mixers are cool too. Wave soldering requires that parts be glued down, since the board is then turned upside down and swished through a bath of molten solder. This bath is agitated and looks like a perpetual tsunami - hence the term "wave soldering". This process is compatible with leaded parts, except that you let gravity hold the parts in place. The alternative is reflow soldering, where the board is treated with a paste that contains tiny balls of solder and flux in a sticky suspension. The parts stick in place, and the board is then run through a machine that heats it up, melting the solder and completing the operation. You can do this yourself with solder paste and a hot air gun - solder paste is available in syringes, ostensibly for rework, but it's handy for home construction too. Modern components are designed to withstand such treatment. Mini-Circuits have some excellent writeups on the subject, and I'm sure others do too. I've salvaged parts from both kinds of boards. The glue used on wave soldered boards looks like a little blob under the component, but it's not very strong - a light push will free the component, once you've dealt with the solder. That you can actually break SBL-1s amazes me. In my experience I've found them to be tough and hard to kill. I know. I've tried. :-) -- Laura Halliday "C'est une femme mutine, assez elegante, ve7ldh@direct.ca grave et legere, ayant le sens Grid: CN89mg du confort et du plaisir en tout." - C. Deneuve From owner-qrp-l@Lehigh.EDU Fri May 30 12:39:28 1997 Received: from fidoii.CC.lehigh.EDU (fidoii.CC.lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.8.5/8.8.5) with ESMTP id MAA04363 for ; Fri, 30 May 1997 12:39:27 -0400 (EDT) Received: from Lehigh.EDU ([127.0.0.1]) by fidoii.cc.Lehigh.EDU with SMTP id <35000-50030>; Fri, 30 May 1997 12:39:08 -0400 Received: from nss2.CC.Lehigh.EDU ([128.180.1.26]) by fidoii.cc.Lehigh.EDU with ESMTP id <34978-47472>; Fri, 30 May 1997 12:35:49 -0400 Received: from tntech.edu (SYSTEM@gemini.tntech.edu [149.149.11.7]) by nss2.CC.Lehigh.EDU (8.8.5/8.8.5) with ESMTP id MAA213181 for ; Fri, 30 May 1997 12:35:23 -0400 Received: from mm-man.cc.tntech.edu ("port 2215"@mm-man.cc.tntech.edu) by tntech.edu (PMDF V5.1-8 #16786) with SMTP id <01IJH1FNIQGC8WWWGK@tntech.edu> for qrp-l@lehigh.edu; Fri, 30 May 1997 07:44:50 CDT Message-Id: <338ECBD4.2F46@tntech.edu> Date: Fri, 30 May 1997 07:45:08 -0500 Reply-To: jmg@tntech.edu Sender: owner-qrp-l@Lehigh.EDU Precedence: bulk From: "Jeff M. Gold" To: "Low Power Amateur Radio Discussion" Subject: qpr++ voltage MIME-version: 1.0 Content-type: text/plain; charset=us-ascii Content-transfer-encoding: 7bit X-Mailer: Mozilla 3.01Gold (Win95; I) X-Listprocessor-Version: 8.1 beta -- ListProcessor(tm) by CREN Status: RO would anyone know the voltage going into the Index mixer? I only have a scope and want to check it to see if that is the problem or if the SBL-1 mixer is different from the index in some parameter that is causing the low power. I worked Germany on 20m last night. .got a good report.. about 2 watts.. so the signal that is getting out is good. From owner-qrp-l@Lehigh.EDU Fri May 30 12:45:39 1997 Received: from fidoii.CC.lehigh.EDU (fidoii.CC.lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.8.5/8.8.5) with ESMTP id MAA04696 for ; Fri, 30 May 1997 12:45:38 -0400 (EDT) Received: from Lehigh.EDU ([127.0.0.1]) by fidoii.cc.Lehigh.EDU with SMTP id <34999-50030>; Fri, 30 May 1997 12:45:24 -0400 Received: from nss2.CC.Lehigh.EDU ([128.180.1.26]) by fidoii.cc.Lehigh.EDU with ESMTP id <34916-47472>; Fri, 30 May 1997 12:44:23 -0400 Received: from mtigwc03.worldnet.att.net (mailhost.worldnet.att.net [204.127.131.34]) by nss2.CC.Lehigh.EDU (8.8.5/8.8.5) with ESMTP id MAA130607 for ; Fri, 30 May 1997 12:44:21 -0400 Received: from LOCALNAME ([207.116.201.199]) by mtigwc03.worldnet.att.net (post.office MTA v2.0 0613 ) with SMTP id AAA26100 for ; Fri, 30 May 1997 16:43:49 +0000 Message-Id: <19970530164348.AAA26100@LOCALNAME> Date: Fri, 30 May 1997 12:50:57 -0400 Reply-To: mstangelo@worldnet.att.net Sender: owner-qrp-l@Lehigh.EDU Precedence: bulk From: "Michael St. Angelo" To: "Low Power Amateur Radio Discussion" Subject: Index QRP++ Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" X-Sender: mstangelo@postoffice.worldnet.att.net X-Mailer: Windows Eudora Light Version 1.5.2 X-Listprocessor-Version: 8.1 beta -- ListProcessor(tm) by CREN Status: RO I am a new subscriber who caught the tail end of the thread about the problems with the QRP++ rig. I had my radio upgraded last year and am planning to use it alot this summer, hence my concern about potential problems. 1.One theory is that the Synergy DBM mixer used in the receiver is being zipped by either: - a strong received signal or EMP(lightning)transients or - transmitter signal leakage as a result of faulty T/R sequencing Has this been verified and are there any recommended mods to prevent mixer damage? 2.Are there problems with the transmitter DBM mixer? 3.Someone mentioned mods for the radio that were first published in the QRP-L journal. Which issue was this in? Is this info available on the Web? 4. What is the latest firmware version used in the QRP++? There has been some discussion on the differences between the Synergy mixer and the SBL-1. I recall that Synergy made a DBM especially for the HF range. It has a lower conversion loss in the 1-30 MHZ range. I can't find the catalog so I don't know all the details. The catalog was a late 1980's edition. If someone has a current catalog or their Webpage we can check to see if this mixer is still available. It may be a good substitute for the Index mixer. Any info would be appreciated. By the way, this is a great list! I wish I knew about it sooner. Mike St. Angelo N2MS email: mstangelo@worldnet.att.net From w1hue@amsat.org Sat Jun 7 16:46:36 1997 Received: from eloi.inel.gov ([204.134.135.13]) by oucsace.cs.ohiou.edu (8.8.5/8.8.5) with ESMTP id QAA04093 for ; Sat, 7 Jun 1997 16:46:34 -0400 (EDT) Received: from pc-lve1 ([134.20.176.115]) by eloi.inel.gov (post.office MTA v2.0 0813 ID# 0-12374) with SMTP id AAA1025; Sat, 7 Jun 1997 14:46:07 -0600 Message-Id: <2.2.16.19970607204508.1c377c9a@eloi> X-Sender: lve1@eloi X-Mailer: Windows Eudora Pro Version 2.2 (16) Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Date: Sat, 07 Jun 1997 14:45:08 -0600 To: qrp-l@lehigh.edu From: Larry East Subject: Curing QRP+ Chirp Cc: QRP_PLUS@amsat.org Status: RO My dull little brain has finally figured out that there are TWO sources of "chirp" in the QRP-PLUS: 1) The PLL settling time when RIT/SPLIT offsets greater than a few kHz are used, and 2) the rise-time of the BFO offset switching signal. (The 650-700 Hz shift in CW transmit/receive frequencies takes place in the BFO, NOT the VFO/PLL circuit). Keying chirp due to either cause is more likely to show up after installing the "Rev 4C" EPROM; this is due to the faster QSK (especially when using an external keyer) provided by the firmware in this EPROM. For some reason (which my dull little brain hasn't figured out yet), the chirp caused by the BFO frequency switching is more noticeable above 30M (20M and higher). You can check for chirp by listening to the keyed output of your QRP+ (run it into a dummy load!) on another receiver, or by on-the-air tests with a local ham. It is most instructive if you can actually listen to your signal -- either in a local receiver or over the phone from another ham. The good news is that both chirps can be easily cured; the bad news is that you have to remove the top three boards from the rig to do it. Both fixes are accomplished by replacing some caps on the LO board (the third one down in the stack). The chirp fixes described below apply to BOTH the QRP+ (original version) and QRP++ ("new improved" or "updated" version). I will also repeat a fix for "soft keying" in the QRP+ that was posted previously (and also described in my April 1997 QRP Quarterly article). Fixing Chirp due to BFO Switching --------------------------------- Change C3 on the LO board from 1.0uF to 0.1uF. Look for a green trimmer cap (shown as C56 in the schematic) near the front right corner of the LO board. C3 will be just slightly to the rear of the trimmer and very close to the right edge of the board; it's a small dipped tantalum, probably orange or yellow in color. Replace C3 with a small 0.1uF mono cap rated at 25V (or higher). Fixing RIT/SPLIT Chirp ---------------------- Change C43 and C44 on the LO board from 4.7uF to 2.2uF. These caps are in the PLL low pass filter and are located near the right rear edge of the board. The original caps are dipped tantalum; replace them with 2.2uF dipped tantalum, rated at 16V or greater. There should be no noticeable chirp now for RIT/OFFSET splits below 10kHz (probably more like 20kHz to 50kHz). Just in case you haven't seen this before... Fixing "Soft Keying" in the QRP+ -------------------------------- THIS DOES NOT APPLY TO THE QRP++! After installing the Rev 4C EPROM in my QRP+, I noticed that the keying was very "soft" unless RIT was used. I discovered that the problem was due to a long time constant in the +12V decoupling to the first driver stage resulting in about a 10ms rise in the keyed waveform (one would like no more than about 5ms). I fixed the problem by changing C54 on the RF board (the top board) from 4.7uF to 0.47uF. C54 is located in the rear left-hand quadrant of the board. The original C54 is a dipped tantalum, and I used the same type (but a factor of 10 smaller in value) for replacement. The voltage rating of the replacement cap should be at least 16V (preferably 25V to 35V). 72, Larry W1HUE/7 From owner-qrp-l@Lehigh.EDU Sat Jun 7 17:41:09 1997 Received: from fidoii.CC.lehigh.EDU (fidoii.CC.lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.8.5/8.8.5) with ESMTP id RAA06328 for ; Sat, 7 Jun 1997 17:41:08 -0400 (EDT) Received: from Lehigh.EDU ([127.0.0.1]) by fidoii.cc.Lehigh.EDU with SMTP id <35058-22358>; Sat, 7 Jun 1997 17:40:43 -0400 Received: from nss2.CC.Lehigh.EDU ([128.180.1.26]) by fidoii.cc.Lehigh.EDU with ESMTP id <35038-19792>; Sat, 7 Jun 1997 17:39:40 -0400 Received: from tntech.edu (SYSTEM@gemini.tntech.edu [149.149.11.7]) by nss2.CC.Lehigh.EDU (8.8.5/8.8.5) with ESMTP id RAA32416 for ; Sat, 7 Jun 1997 17:39:22 -0400 Received: from tntech.edu by tntech.edu (PMDF V5.1-8 #16786) id <01IJSQ2QDWB48WW1ZQ@tntech.edu> for qrp-l@lehigh.edu; Sat, 7 Jun 1997 16:38:20 CDT Message-Id: <01IJSQ2QDWB68WW1ZQ@tntech.edu> Date: Sat, 07 Jun 1997 16:38:20 -0500 (CDT) Reply-To: JMG@tntech.edu Sender: owner-qrp-l@Lehigh.EDU Precedence: bulk From: "Jeff M. Gold" To: "Low Power Amateur Radio Discussion" Subject: QRP++ Fixed :*) MIME-version: 1.0 Content-type: TEXT/PLAIN; CHARSET=US-ASCII X-VMS-To: IN%"qrp-l@lehigh.edu" X-VMS-Cc: JMG X-Listprocessor-Version: 8.1 beta -- ListProcessor(tm) by CREN Status: RO I have had many requests for this information.. so hope other will learn from my encounters of the first kind. My QRP++ with the newer mixer stopped receiving real well, and only would transmitt in the milliwatt range. All other functions worked. When taking the rig apart we couldn't get the old mixer from the board. What we did was to cut the top part of the case, carefully off. Then I took great care and cleaned all the silicon looking goop and all other stuff out.. well Conard Murray did the first round of everything (WS4S). We stuck a SBL-1, by soldering the SBL-1 directly to the leg parts that remain sticking up from the mixer after you gut it. The reciever worked ok, but it would only put out about 3 watts on the higher bands and go down to about 1/4 watt on 160 meter. I sent about $25 off to index and ordered a replacement mixer. It took a little over a week and I did recieve it. I think this was a decent turn around time. Decided to try to replace the mixer myself. I used solder wick and cleaned the solder off and pulled the SBL-1 off and then carefully soldered the new mixer to the top of the legs sticking up from the gutted old mixer. I fired up the QRP++ I now get over 5 watts out and everything is working fine. I backed the power down to 5 watts. It gets higher power on the lower bands like it used to. So for the people who say these mixers never go.. scientific evidence point to the fact that they indeed do. I had a bad SBL-1 on my HW9 right out of the box.. and this new mixer blew from who knows what. I did have Conard put in the diode protection mod.. think it is Larry East's. I was hoping someone nearer to where they make the mixers.. think it is NJ and has a QRP plus will do a group buy.. think we should all buy extra mixers if possible. I don't like the prospect of never being able to get a suitable replacement. I have called the factory. and they never got back to me. So if you are not a tech wiz and you have burnt out your mixer. Get a direct replacement.. just cut the top of the case of the old one off and solder directly to it. Also, if it blows for some reason.. not a major deal to repair at this point.. thanks WS4S 72 Jeff, AC4HF From owner-qrp-l@Lehigh.EDU Tue Jun 10 10:37:54 1997 Received: from fidoii.CC.lehigh.EDU (fidoii.CC.lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.8.5/8.8.5) with ESMTP id KAA09552 for ; Tue, 10 Jun 1997 10:37:53 -0400 (EDT) Received: from Lehigh.EDU ([127.0.0.1]) by fidoii.cc.Lehigh.EDU with SMTP id <35523-46840>; Tue, 10 Jun 1997 10:37:32 -0400 Received: from nss2.CC.Lehigh.EDU ([128.180.1.26]) by fidoii.cc.Lehigh.EDU with ESMTP id <35483-63996>; Tue, 10 Jun 1997 10:35:57 -0400 Received: from eloi.inel.gov ([204.134.135.13]) by nss2.CC.Lehigh.EDU (8.8.5/8.8.5) with ESMTP id KAA61180 for ; Tue, 10 Jun 1997 10:35:47 -0400 Received: from pc-lve1 ([134.20.176.115]) by eloi.inel.gov (Post.Office MTA v3.1 release PO203a ID# 0-36734U600L100S0) with SMTP id AAD26240; Tue, 10 Jun 1997 08:36:16 -0600 Message-Id: <2.2.16.19970610143444.26472526@eloi> Date: Tue, 10 Jun 1997 08:34:44 -0600 Reply-To: w1hue@amsat.org Sender: owner-qrp-l@Lehigh.EDU Precedence: bulk From: Larry East To: "Low Power Amateur Radio Discussion" Subject: QRP+ Hardware, etc. Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" X-To: QRP_PLUS@amsat.com X-Sender: lve1@eloi X-Mailer: Windows Eudora Pro Version 2.2 (16) X-Listprocessor-Version: 8.1 beta -- ListProcessor(tm) by CREN Status: O I received the following note from Mark Peterson, WF7M, which he asked me to pass along: > I asked Bruce Franklin about >whether Index will continue to support the various EPROM upgrades, and he >indicated in the affirmative; however, he will charge a modest amount for >supplying same--$10.00 or so, he thought. He will also take care of opening up >the transmit range, should new HF ham bands be acquired. > >I have acquired from Bruce a supply of QRP+(+) and QRP+ Companion cabinet and >chassis covers. These were going to the scrapyard still in mint, paper-wrapped >condition. I'll charge a little to send these out, but, if anyone would like a >replacement due to scratches, etc. (I can't imagine denting one without also >ruining the radio), I can help. Mark can be contacted at <70233.1106@CompuServe.COM>. By the way -- I hope that Bruce has kept records of the "display offset" that must be put into the EPROM for each individual radio. This offset compensates for the BFO not being exactly 50MHz. The owner of QRP++ in which I tried out my mods received a Rev 4C EPROM without the offset; consequently, the frequency display is about 700 Hz off. Drove me up the wall trying to figure out what was wrong; then I put the old EPROM back in and the displayed frequency was right on! (Yes, I had the SSB/CW mode set correctly... :-) 72, L. From w1hue@amsat.org Mon Jun 16 09:28:00 1997 Received: from eloi.inel.gov ([204.134.135.13]) by oucsace.cs.ohiou.edu (8.8.5/8.8.5) with ESMTP id JAA16740 for ; Mon, 16 Jun 1997 09:27:58 -0400 (EDT) Received: from pc-lve1 ([134.20.176.115]) by eloi.inel.gov (Post.Office MTA v3.1 release PO203a ID# 0-36734U600L100S0) with SMTP id AAA12753; Mon, 16 Jun 1997 07:27:08 -0600 Message-Id: <2.2.16.19970616132429.14ef3e18@eloi> X-Sender: lve1@eloi X-Mailer: Windows Eudora Pro Version 2.2 (16) Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Date: Mon, 16 Jun 1997 07:24:29 -0600 To: David White From: Larry East Subject: Re: QRP-PLUS Mods Cc: QRP_PLUS@amsat.org Status: RO At 07:37 PM 6/14/97 -0500, you wrote: >Larry W1HUE/7, > >I'm looking for any new information regarding a potential cure for "chirp" >in a QRP-PLUS. I just completed mods as suggested per your post to QRP-L on >6/7/97. > > >I have a QRP-PLUS (SN 508) which was upgraded by Index last year to a NEW >QRP-PLUS (QRP++). Unfortunately, the mods only cured part of the "chirp" >problem. > >The "chirp" I've been experiencing with the QRP-PLUS can be described as >follows. > >1. "Chirp" can be heard when operating in the XCVE mode on all bands. >However, the "chirp" appears to be worse on 20 meters and above (as >described in your post). The mods did not appear to have any audible affect >on the "chirp" when operating in the XCVE mode. > Hmmm... and you are SURE that you replaced the correct cap in the BFO? >2. Before and after the mods, keying was/is clean when operating in the >RIT/SPLIT mode with no offset...no "chirp!" Before the mods, keying would >become "chirpy" with offsets greater than a few kHz. After the mods, keying >is clean with significant offsets.......sounds great! > Good! >So, I'm now wondering if there is a THIRD source of "chirp" in the QRP-PLUS. >If you, or any of the other guys, come up with anything else new regarding >"chirp" in the QRP-PLUS, I sure would appreciate hearing about it. In the >meantime, I'll muck around with the unit some more. > Could be there is a third cause ... only two things come to mind at the moment: 1) the transistor that switches the BFO offset (don't have the schematic handy at the moment to get the part number) and 2) the diode that does the switching. >By the way, do you and any of the other QRP-PLUS owners have a mailing list >(or such) for QRP-PLUS mods? > Don't know of one... other than my personal list. 72, L. From w1hue@amsat.org Mon Jun 23 11:07:08 1997 Received: from eloi.inel.gov ([204.134.135.13]) by oucsace.cs.ohiou.edu (8.8.5/8.8.5) with ESMTP id LAA27446 for ; Mon, 23 Jun 1997 11:07:06 -0400 (EDT) Received: from pc-lve1 ([134.20.176.115]) by eloi.inel.gov (Post.Office MTA v3.1 release PO203a ID# 0-36734U600L100S0) with SMTP id AAC2682; Mon, 23 Jun 1997 09:05:54 -0600 Message-Id: <2.2.16.19970623150512.189785f2@eloi> X-Sender: lve1@eloi X-Mailer: Windows Eudora Pro Version 2.2 (16) Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Date: Mon, 23 Jun 1997 09:05:12 -0600 To: QRP_PLUS@amsat.org From: Larry East Subject: New QRP+ EPROM Status: RO I just received the following information from Chris, HB9AJP: > >I just wanted to inform you, that I got the latest EPROM-revison from >Bruce Franklin last week: Rev 4D. There was no explanation with it, so >I don't know the difference to Rev 4C. > >However, I found out that with this Rev 4D in my QRP+ Nr. 727, I do not >have the mushy keying. I measured the rise time of the transmitter >output envelope to less than 1 ms in all modes (XCEVE, RIT, SPLIT). > Sounds like the Rev 4D EPROM incorporates a longer delay between key-down and switching on the carrier (done by un-balancing the balanced modulator). That would fix the problem. (The Rev 4C code produces a longer delay when using RIT or SPLIT to give the PLL time to stabilize.) However, the longer delay could limit the maximum keying speed to less than 45 WPM when using an external keyer (no problem for me! :-). I have noted that the maximum (external) keying speed that I can use with a Rev 4C EPROM when using RIT or SPLIT is about 40 WPM (works fine in my usual 15 - 30 WPM range). 72, Larry W1HUE/7 From owner-qrp-l@Lehigh.EDU Fri Jun 27 10:09:14 1997 Received: from fidoii.CC.lehigh.EDU (fidoii.CC.lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.8.5/8.8.5) with ESMTP id KAA25524 for ; Fri, 27 Jun 1997 10:09:13 -0400 (EDT) Received: from Lehigh.EDU ([127.0.0.1]) by fidoii.cc.Lehigh.EDU with SMTP id <35306-41034>; Fri, 27 Jun 1997 10:08:54 -0400 Received: from nss2.CC.Lehigh.EDU ([128.180.1.26]) by fidoii.cc.Lehigh.EDU with ESMTP id <35118-27216>; Fri, 27 Jun 1997 10:07:57 -0400 Received: from x12.boston.juno.com (x12.boston.juno.com [205.231.101.26]) by nss2.CC.Lehigh.EDU (8.8.5/8.8.5) with ESMTP id KAA69685 for ; Fri, 27 Jun 1997 10:07:53 -0400 Received: (from k8cv@juno.com) by x12.boston.juno.com (queuemail) id KBK12870; Fri, 27 Jun 1997 10:06:17 EDT Message-Id: <19970627.140240.10270.5.k8cv@juno.com> Date: Fri, 27 Jun 1997 12:57:40 GMT Reply-To: k8cv@juno.com Sender: owner-qrp-l@Lehigh.EDU Precedence: bulk From: k8cv@juno.com (Walt D Amos) To: "Low Power Amateur Radio Discussion" Subject: INDEX humble pie......... X-Mailer: Juno 1.38 X-Juno-Line-Breaks: 7-11 X-Listprocessor-Version: 8.1 beta -- ListProcessor(tm) by CREN Status: RO IT'S BACK..............Got my qrp plus back with the mail from a week at the cottage. Weather was nice and so was the eating, the scale say's !! Bruce was " waiting for parts " and that is why it took so long. He say he has never called me, so I guess I owe him an apology , SORRY BRUCE! grovel, grovel........... THANKS BRUCE , the little R2D2 black box is again making contacts. Sorry for all the band width, as they say, but the results speak for themselves. Thanks all for the help and especially Bill Todd , N7MFB. 73 a see you in the fox hunts this fall, have a good summer. Walt K8CV From owner-qrp-l@Lehigh.EDU Thu Jul 3 19:10:51 1997 Received: from fidoii.CC.lehigh.EDU (fidoii.CC.lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.8.5/8.8.5) with ESMTP id TAA01301 for ; Thu, 3 Jul 1997 19:10:50 -0400 (EDT) Received: from Lehigh.EDU ([127.0.0.1]) by fidoii.cc.Lehigh.EDU with SMTP id <35051-68112>; Thu, 3 Jul 1997 19:09:24 -0400 Received: from nss2.CC.Lehigh.EDU ([128.180.1.26]) by fidoii.cc.Lehigh.EDU with ESMTP id <35002-23826>; Thu, 3 Jul 1997 19:04:27 -0400 Received: from elektra.ultra.net (elektra.ultra.net [199.232.56.13]) by nss2.CC.Lehigh.EDU (8.8.5/8.8.5) with ESMTP id TAA68342 for ; Thu, 3 Jul 1997 19:03:53 -0400 Received: from pang (d20.dial-1.nsh.nh.ultra.net [205.247.181.20]) by elektra.ultra.net (8.8.5/ult1.06) with SMTP id TAA04809 for ; Thu, 3 Jul 1997 19:03:47 -0400 (EDT) Message-Id: <3.0.32.19970703190306.007fbc60@ultranet.com> Date: Thu, 03 Jul 1997 19:03:12 -0400 Reply-To: whd-inc@ultranet.com Sender: owner-qrp-l@Lehigh.EDU Precedence: bulk From: William Davis To: "Low Power Amateur Radio Discussion" Subject: HELP! - sick Index Labs qrp+ Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" X-Sender: whd-inc@ultranet.com X-Mailer: Windows Eudora Pro Version 3.0 (32) X-Listprocessor-Version: 8.1 beta -- ListProcessor(tm) by CREN Status: RO Hello, My name is William, and I have an Index Labs qrp+, but just before FD was about to start, the rig started playing up. The symptoms are that it will not tune, or do anything which involves use of the tuning-knob. It still transmits and receives OK, but only on the frequency set in the VFO (which can no longer be changed). Memories can be selected but not changed, similarly keyer speed and filter width can be selected, but not changed. Any ideas, anyone? Many thanks in advance - Regards - William PS - I've tried phoning Index Labs, but they're not returning my calls (sounds ominous...) From owner-qrp-l@Lehigh.EDU Thu Jul 3 19:40:02 1997 Received: from fidoii.CC.lehigh.EDU (fidoii.CC.lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.8.5/8.8.5) with ESMTP id TAA01878 for ; Thu, 3 Jul 1997 19:40:00 -0400 (EDT) Received: from Lehigh.EDU ([127.0.0.1]) by fidoii.cc.Lehigh.EDU with SMTP id <35063-23826>; Thu, 3 Jul 1997 19:38:54 -0400 Received: from nss2.CC.Lehigh.EDU ([128.180.1.26]) by fidoii.cc.Lehigh.EDU with ESMTP id <34959-50702>; Thu, 3 Jul 1997 19:38:00 -0400 Received: from mtigwc03.worldnet.att.net (mtigwc03.worldnet.att.net [204.127.131.34]) by nss2.CC.Lehigh.EDU (8.8.5/8.8.5) with ESMTP id TAA37475 for ; Thu, 3 Jul 1997 19:37:54 -0400 Received: from default ([207.147.101.169]) by mtigwc03.worldnet.att.net (post.office MTA v2.0 0613 ) with SMTP id AAA27330; Thu, 3 Jul 1997 23:37:20 +0000 Message-Id: <33BC3793.125D@worldnet.att.net> Date: Thu, 03 Jul 1997 18:36:51 -0500 Reply-To: k5rov@worldnet.att.net Sender: owner-qrp-l@Lehigh.EDU Precedence: bulk From: James Parsons To: "Low Power Amateur Radio Discussion" Subject: Re: HELP! - sick Index Labs qrp+ References: <3.0.32.19970703190306.007fbc60@ultranet.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-To: whd-inc@ultranet.com X-Cc: Low Power Amateur Radio Discussion X-Mailer: Mozilla 3.0C-WorldNet (Win95; I) X-Listprocessor-Version: 8.1 beta -- ListProcessor(tm) by CREN Status: RO William Davis wrote: > > Hello, My name is William, and I have an Index Labs qrp+, but just before > FD was about to start, the rig started playing up. The symptoms are that > it will not tune, or do anything which involves use of the tuning-knob. It > still transmits and receives OK, but only on the frequency set in the VFO > (which can no longer be changed). Memories can be selected but not > changed, similarly keyer speed and filter width can be selected, but not > changed. Any ideas, anyone? Many thanks in advance - > Regards - > William > PS - I've tried phoning Index Labs, but they're not returning my calls > (sounds ominous...) I am one of those waiting for the new SG-2020. But, I understand that while it is being built by SGC, it will be owned and sold by Index Labs. I must admit that scares me. I keep hearing and reading stories from folks trying to get their QRP+ worked on. It appears that they cannot even get an answer to their phone calls. It seems that the owner of Index Labs does not have a very good track record; or, at least, thats the impression I get. I sure want an SG-2020, but I just donno..... Jim, K5ROV -- James (Jim), Parsons, K5ROV USAF, Ret. k5rov@worldnet.att.net QCWA, NWQRP, Fists, ARRL EX: W1RLA, K5FBB, K4FEO, SV0WN (CRETE), SV0WN (RHODES), DL4NC, DL4JP, KA2FC (JAPAN), KA2JP (JAPAN). JOHN 3:16 From owner-qrp-l@Lehigh.EDU Mon Jul 14 12:42:32 1997 Received: from fidoii.CC.lehigh.EDU (fidoii.CC.lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.8.5/8.8.5) with ESMTP id MAA04127 for ; Mon, 14 Jul 1997 12:42:31 -0400 (EDT) Received: from Lehigh.EDU ([127.0.0.1]) by fidoii.cc.Lehigh.EDU with SMTP id <35169-39110>; Mon, 14 Jul 1997 12:41:21 -0400 Received: from nss2.CC.Lehigh.EDU ([128.180.1.26]) by fidoii.cc.Lehigh.EDU with ESMTP id <35151-43972>; Mon, 14 Jul 1997 12:36:59 -0400 Received: from tntech.edu (SYSTEM@gemini.tntech.edu [149.149.11.7]) by nss2.CC.Lehigh.EDU (8.8.5/8.8.5) with ESMTP id MAA46833 for ; Mon, 14 Jul 1997 12:36:47 -0400 Received: from tntech.edu by tntech.edu (PMDF V5.1-8 #16786) id <01IL84NCB7TS8WWDK7@tntech.edu> for qrp-l@lehigh.edu; Mon, 14 Jul 1997 11:36:36 CDT Message-Id: <01IL84NCBHHE8WWDK7@tntech.edu> Date: Mon, 14 Jul 1997 11:36:36 -0500 (CDT) Reply-To: JMG@tntech.edu Sender: owner-qrp-l@Lehigh.EDU Precedence: bulk From: "Jeff M. Gold" To: "Low Power Amateur Radio Discussion" Subject: QRP++ front end overload MIME-version: 1.0 Content-type: TEXT/PLAIN; CHARSET=US-ASCII X-VMS-To: IN%"qrp-l@lehigh.edu" X-VMS-Cc: JMG X-Listprocessor-Version: 8.1 beta -- ListProcessor(tm) by CREN Status: RO I have heard mention of a modification to the QRP++ to make it so that the receiver doesn't get overloaded. Lately my QRP++ seems to be really overloaded.. .thinking it needs therapy. Help will be appreciated. 72 Jeff, AC4HF From w1hue@amsat.org Tue Aug 5 11:24:53 1997 Received: from eloi.inel.gov (eloi.INEL.GOV [204.134.135.13]) by oucsace.cs.ohiou.edu (8.8.5/8.8.5) with ESMTP id LAA07837 for ; Tue, 5 Aug 1997 11:24:52 -0400 (EDT) Received: from pc-lve1 ([134.20.176.115]) by eloi.inel.gov (Post.Office MTA v3.1 release PO203a ID# 0-36734U600L100S0) with SMTP id AAB8235; Tue, 5 Aug 1997 09:24:26 -0600 Message-Id: <2.2.16.19970805152327.1027d5f4@eloi> X-Sender: lve1@eloi X-Mailer: Windows Eudora Pro Version 2.2 (16) Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Date: Tue, 05 Aug 1997 09:23:27 -0600 To: QRP_PLUS@amsat.org From: Larry East Subject: QRP+ Parts Available Cc: mark1329@idt.net Status: RO Mark Peterson, WF7M, has acquired a stock of QRP+ spare parts from Index Labs and is making them available at modest prices. Mark's inventory (as of about a week ago) and price list follows: QRP+ Cabinet Top $15.00 QRP+ Cabinet Bottom (includes front panel) $15.00 QRP+ Cabinet Set (top and bottom pieces) $25.00 Large Tuning Knob $ 8.00 Small Knob $ 4.00 Meter $10.00 Black Cabinet Screw (each) $ 0.25 Front Tripod Foot $ 5.00 QRP+ Circuit Boards (original configuration) $10.00 Speaker $ 5.00 Shield (plate and insulator on standoffs) $ 1.00 Ribbon Cable Assembly $ 2.50 Rotary Encoders $30.00 Prices DO NOT include shipping. Please address all questions/orders/etc. to Mark, NOT to me. He has two email addresses: mark1329@mail.idt.net 70233.1106@compuserve.com 72, Larry W1HUE/7 From owner-qrp-l@Lehigh.EDU Sun Aug 24 14:10:37 1997 Received: from fidoii.CC.lehigh.EDU (fidoii.CC.lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.8.5/8.8.5) with ESMTP id OAA11536 for ; Sun, 24 Aug 1997 14:10:36 -0400 (EDT) Received: from Lehigh.EDU ([127.0.0.1]) by fidoii.cc.Lehigh.EDU with SMTP id <35402-37186>; Sun, 24 Aug 1997 14:09:59 -0400 Received: from nss2.CC.Lehigh.EDU ([128.180.1.26]) by fidoii.cc.Lehigh.EDU with ESMTP id <35388-54852>; Sun, 24 Aug 1997 14:09:00 -0400 Received: from fletch.fix.net (root@fletch.fix.net [206.190.71.1]) by nss2.CC.Lehigh.EDU (8.8.5/8.8.5) with ESMTP id OAA55866 for ; Sun, 24 Aug 1997 14:08:58 -0400 Received: from parkers (lts7-219.snlo.dialup.fix.net [206.190.72.219]) by fletch.fix.net (8.8.5/8.7.3) with SMTP id LAA11176; Sun, 24 Aug 1997 11:10:09 -0700 (PDT) Message-Id: <2.2.32.19970824181300.0075ef04@fix.net> Date: Sun, 24 Aug 1997 11:13:00 -0700 Reply-To: jparker@fix.net Sender: owner-qrp-l@Lehigh.EDU Precedence: bulk From: Jerry Parker To: "Low Power Amateur Radio Discussion" Subject: QRP+ Mic Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" X-Cc: pharden@aoc.nrao.edu X-Sender: jparker@fix.net X-Mailer: Windows Eudora Pro Version 2.2 (32) X-Listprocessor-Version: 8.1 beta -- ListProcessor(tm) by CREN Status: RO I have a weekend schedule with long time friends on 40 meter SSB. When I disposed of my Kenwood Twins and replaced them with my QRP+ I found that I needed to hook up a mic so I could make the schedule on SSB. Well, it was not as easy as I thought. I tried several different electrets. Some from Radio Shack, some I had on hand and some out of cordless phones. Even tried a hand mic from a HT as suggested by the manufacturer. No matter what I did, my friends always claimed the audio sounded bad, not like myself etc. I then grabbed my old Sure 444 and hooked it up setting the switching up as with the electrets. I experimented with a DC blocking capacitor in series with the mic lead until the rig sounded good into a dummy load on another receiver. Next time I checked into my weekend schedule all my friends commented on how nice it was to have me up on my Kenwood Twins again. Of course I brought them up to date. Here is how I wired the mic: mic hot_____33 uf________Tip cap PTT___________________Ring Ground___________________Sleeve You should be able to use your favorite old handmic too using this scheme. Enjoy,,,72,,,Jerry...WA6OWR...K From owner-qrp-l@Lehigh.EDU Sun Aug 24 14:58:23 1997 Received: from fidoii.CC.lehigh.EDU (fidoii.CC.lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.8.5/8.8.5) with ESMTP id OAA12498 for ; Sun, 24 Aug 1997 14:58:21 -0400 (EDT) Received: from Lehigh.EDU ([127.0.0.1]) by fidoii.cc.Lehigh.EDU with SMTP id <35285-37186>; Sun, 24 Aug 1997 14:57:47 -0400 Received: from nss2.CC.Lehigh.EDU ([128.180.1.26]) by fidoii.cc.Lehigh.EDU with ESMTP id <34932-37186>; Sun, 24 Aug 1997 14:56:56 -0400 Received: from OBIWAN.ENDOR.COM (BABIARZ@obiwan.endor.com [199.103.183.1]) by nss2.CC.Lehigh.EDU (8.8.5/8.8.5) with SMTP id OAA61324 for ; Sun, 24 Aug 1997 14:56:43 -0400 Received: from Gregoire.endor.com [199.103.183.143] by OBIWAN.ENDOR.COM with SMTP-OpenVMS via TCP/IP; Sun, 24 Aug 1997 15:00 EST Message-Id: Date: Sun, 24 Aug 97 14:56:19 PDT Reply-To: gregoire@endor.com Sender: owner-qrp-l@Lehigh.EDU Precedence: bulk From: gregoire@endor.com To: "Low Power Amateur Radio Discussion" Subject: FW: RE: Mic for a QRP++???? MIME-Version: 1.0 Content-Type: TEXT/PLAIN; CHARSET=us-ascii X-To: Low power amateur radio discusion X-Mailer: Chameleon V0.05, TCP/IP for Windows, NetManage Inc. X-Listprocessor-Version: 8.1 beta -- ListProcessor(tm) by CREN Status: RO ---------------Original Message--------------- Hello Jim, I got a super mic. from Icom. Go to their web page and look up surplus equipment. You will find instructions on what to do next. I bought a HM-70 speaker mic. for $35 It normally sells for $70. The catch is they don't make them anymore. When they are gone then they are all gone. The mic. has plenty of drive and of course is not hooked up as a speaker mic. but a regular microphone. I have a diagram for hooking it up if you need it. Just let me know. 73 -------------------------------------------------------- WIMPS 12 M ST/PRV,DX 17 M ST\PRV,DX 30 M ST/PRV,DX 00--00 01--00 03--00 -------------------------------------------------------- de AA1IK, Lead by example. Ernie Gregoire It is better to pull a string, than to push it. R.R. 1, Box 221, South Rd. Fists # 2644, N.E.QRP # 202 Canaan, NH. 03741 QRP-L # 95, Fly fisher & tier, Promise Keeper. E-mail address: gregoire@endor.com packet address: AA1IK@WA1WOK.FN43FE.NH.USA.NA ------------------------------------- 08/24/97 14:52:05 ----------End of Original Message---------- -------------------------------------------------------- WIMPS 12 M ST/PRV,DX 17 M ST\PRV,DX 30 M ST/PRV,DX 00--00 01--00 03--00 -------------------------------------------------------- de AA1IK, Lead by example. Ernie Gregoire It is better to pull a string, than to push it. R.R. 1, Box 221, South Rd. Fists # 2644, N.E.QRP # 202 Canaan, NH. 03741 QRP-L # 95, Fly fisher & tier, Promise Keeper. E-mail address: gregoire@endor.com packet address: AA1IK@WA1WOK.FN43FE.NH.USA.NA ------------------------------------- 08/24/97 14:56:19 From owner-qrp-l@Lehigh.EDU Sun Aug 24 17:57:51 1997 Received: from fidoii.CC.lehigh.EDU (fidoii.CC.lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.8.5/8.8.5) with ESMTP id RAA15937 for ; Sun, 24 Aug 1997 17:57:50 -0400 (EDT) Received: from Lehigh.EDU ([127.0.0.1]) by fidoii.cc.Lehigh.EDU with SMTP id <35133-65086>; Sun, 24 Aug 1997 17:57:15 -0400 Received: from nss2.CC.Lehigh.EDU ([128.180.1.26]) by fidoii.cc.Lehigh.EDU with ESMTP id <35055-37186>; Sun, 24 Aug 1997 17:56:42 -0400 Received: from ferrari.sfu.ca (root@ferrari.sfu.ca [142.58.110.11]) by nss2.CC.Lehigh.EDU (8.8.5/8.8.5) with ESMTP id RAA44929 for ; Sun, 24 Aug 1997 17:56:35 -0400 Received: from wizard.ucs.sfu.ca (wizard.ucs.sfu.ca [142.58.1.70]) by ferrari.sfu.ca with SMTP (8.8.5/SFU-2.7H) id OAA21362 for (from paul1@wizard.ucs.sfu.ca); Sun, 24 Aug 1997 14:56:34 -0700 (PDT) Received: by wizard.ucs.sfu.ca (NX5.67f2/NX3.0S) id AA05169; Sun, 24 Aug 97 14:55:52 -0700 Message-Id: <9708242155.AA05169@wizard.ucs.sfu.ca> Date: Sun, 24 Aug 97 14:55:51 PDT Reply-To: paul1@wizard.ucs.sfu.ca Sender: owner-qrp-l@Lehigh.EDU Precedence: bulk From: Paul Erickson To: "Low Power Amateur Radio Discussion" Subject: QRP+ mic issues X-To: qrp-l@Lehigh.EDU (qrp) X-Mailer: ELM [version 2.3 PL9] X-Listprocessor-Version: 8.1 beta -- ListProcessor(tm) by CREN Status: RO Just a word of caution on those playing with mic's for their qrp+'s. Make sure any "bad audio" reports you get are due to the mic and not the power supply. I found that in the process of playing with various supplies that they could have profound effects on the ssb quality, and the culpret was rf filtering. I would always test a new mike with a battery first. Then see if there is a difference with the other supply. I use a RS element in the mic case that came with mine, and reports seem fine. I'm going to try a heil element. Has anyone else tried one??? cheers, Paul VE7CQK email: paul1@wizard.ucs.sfu.ca From owner-qrp-l@Lehigh.EDU Sun Aug 24 21:40:31 1997 Received: from fidoii.CC.lehigh.EDU (fidoii.CC.lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.8.5/8.8.5) with ESMTP id VAA20735 for ; Sun, 24 Aug 1997 21:40:30 -0400 (EDT) Received: from Lehigh.EDU ([127.0.0.1]) by fidoii.cc.Lehigh.EDU with SMTP id <35287-54852>; Sun, 24 Aug 1997 21:40:02 -0400 Received: from nss2.CC.Lehigh.EDU ([128.180.1.26]) by fidoii.cc.Lehigh.EDU with ESMTP id <34851-54852>; Sun, 24 Aug 1997 21:39:03 -0400 Received: from x12.boston.juno.com (x12.boston.juno.com [205.231.101.26]) by nss2.CC.Lehigh.EDU (8.8.5/8.8.5) with ESMTP id VAA50567 for ; Sun, 24 Aug 1997 21:38:59 -0400 Received: (from k8cv@juno.com) by x12.boston.juno.com (queuemail) id VjY09849; Sun, 24 Aug 1997 21:36:02 EDT Message-Id: <19970825.013205.9926.9.k8cv@juno.com> Date: Mon, 25 Aug 1997 01:18:06 GMT Reply-To: k8cv@juno.com Sender: owner-qrp-l@Lehigh.EDU Precedence: bulk From: k8cv@juno.com To: "Low Power Amateur Radio Discussion" Subject: Qrp ++ flat toping........ X-Mailer: Juno 1.38 X-Juno-Line-Breaks: 5-7 X-Listprocessor-Version: 8.1 beta -- ListProcessor(tm) by CREN Status: RO My qrp ++ looked terrible on the monitor scope and was bitching to an English ham and he said it was flat toping and sure enough turned down the white drive control on the back and things started to look almost normal on the scope here. I am using a MFJ speaker mike that came with it from the guy I bought it from. I am NOT a phone man as you can tell................ :-) Walt K8CV From owner-qrp-l@Lehigh.EDU Tue Nov 18 17:58:27 1997 Received: from fidoii.CC.lehigh.EDU (fidoii.CC.lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.8.5/8.8.5) with ESMTP id RAA00351 for ; Tue, 18 Nov 1997 17:58:25 -0500 (EST) Received: from Lehigh.EDU ([127.0.0.1]) by fidoii.cc.Lehigh.EDU with SMTP id <35134-28364>; Tue, 18 Nov 1997 17:58:17 -0500 Received: from nss4.cc.Lehigh.EDU ([128.180.1.13]) by fidoii.cc.Lehigh.EDU with ESMTP id <34977-43728>; Tue, 18 Nov 1997 16:28:16 -0500 Received: from nd.edu (nd.edu [129.74.250.101]) by nss4.cc.Lehigh.EDU (8.8.8/8.8.5) with SMTP id QAA144994 for ; Tue, 18 Nov 1997 16:26:16 -0500 Received: from [129.74.86.74] (actually keating.business.nd.edu) by nd.edu with ND-SMTP (PP); Tue, 18 Nov 1997 16:19:16 -0500 Message-Id: Date: Tue, 18 Nov 1997 16:19:16 -0500 Reply-To: Barry.P.Keating.1@nd.edu Sender: owner-qrp-l@Lehigh.EDU Precedence: bulk From: Barry Keating To: "Low Power Amateur Radio Discussion" Subject: QRP+ Power Adjustment Shaft Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" X-Sender: Barry.P.Keating.1@pop.nd.edu X-Listprocessor-Version: 8.1 beta -- ListProcessor(tm) by CREN Status: RO Group, I need some help. The Index QRP+ rig has a nylon shaft on the rear for adjusting the power level. The shaft is a slotted nylon shaft with grooves down the sides. There must be a knob which will mate with this shaft (but I have not been able to find one). It is darned difficult to adjust down to milliwatt levels and back up to full power without a knob. Anyone know of a particular knob for this shaft? Barry Keating WD4MSM From owner-qrp-l@Lehigh.EDU Wed Nov 19 00:14:05 1997 Received: from fidoii.CC.lehigh.EDU (fidoii.CC.lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.8.5/8.8.5) with ESMTP id AAA16235 for ; Wed, 19 Nov 1997 00:14:04 -0500 (EST) Received: from Lehigh.EDU ([127.0.0.1]) by fidoii.cc.Lehigh.EDU with SMTP id <35250-32088>; Wed, 19 Nov 1997 00:07:30 -0500 Received: from nss4.cc.Lehigh.EDU ([128.180.1.13]) by fidoii.cc.Lehigh.EDU with ESMTP id <34893-28364>; Tue, 18 Nov 1997 19:27:19 -0500 Received: from dancris.com (user1.dancris.com [204.177.80.10]) by nss4.cc.Lehigh.EDU (8.8.8/8.8.5) with ESMTP id SAA53466 for ; Tue, 18 Nov 1997 18:24:06 -0500 Received: from dancris.com by dancris.com (8.8.5/DANCRIS-1.2) id QAA28654 for <>; Tue, 18 Nov 1997 16:21:51 -0700 (MST) Message-Id: <3471C0F7.3EAA1BD2@dancris.com> Date: Tue, 18 Nov 1997 16:23:19 +0000 Reply-To: n7kt@dancris.com Sender: owner-qrp-l@Lehigh.EDU Precedence: bulk From: Roger Hightower To: "Low Power Amateur Radio Discussion" Subject: Re: QRP+ Power Adjustment Shaft References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-To: Barry.P.Keating.1@nd.edu X-Cc: Low Power Amateur Radio Discussion X-Mailer: Mozilla 4.02 [en]C-DIAL (Win95; U) X-Listprocessor-Version: 8.1 beta -- ListProcessor(tm) by CREN Status: RO Mouser part #550-15001 will work. Price is 1.24 ea, so you might want to have something else to order. 72...Roger -- 72/73, de Roger, N7KT AK-QRP 167, ARCI 8946, CQC 176, GQRP 9081, NE-QRP 383, NORCAL 1099, QRP-L 62 From owner-qrp-l@Lehigh.EDU Wed Nov 19 00:18:10 1997 Received: from fidoii.CC.lehigh.EDU (fidoii.CC.lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.8.5/8.8.5) with ESMTP id AAA16377 for ; Wed, 19 Nov 1997 00:18:08 -0500 (EST) Received: from Lehigh.EDU ([127.0.0.1]) by fidoii.cc.Lehigh.EDU with SMTP id <35273-34650>; Wed, 19 Nov 1997 00:09:28 -0500 Received: from nss4.cc.Lehigh.EDU ([128.180.1.13]) by fidoii.cc.Lehigh.EDU with ESMTP id <35141-73422>; Tue, 18 Nov 1997 19:53:57 -0500 Received: from jason05.u.washington.edu (root@jason05.u.washington.edu [140.142.78.6]) by nss4.cc.Lehigh.EDU (8.8.8/8.8.5) with ESMTP id SAA188604 for ; Tue, 18 Nov 1997 18:28:26 -0500 Received: from homer03.u.washington.edu (slee@homer03.u.washington.edu [140.142.70.13]) by jason05.u.washington.edu (8.8.4+UW97.07/8.8.4+UW97.05) with ESMTP id PAB22996; Tue, 18 Nov 1997 15:28:24 -0800 Received: from localhost (slee@localhost) by homer03.u.washington.edu (8.8.4+UW97.07/8.8.4+UW97.04) with SMTP id PAA104270; Tue, 18 Nov 1997 15:28:22 -0800 Message-Id: Date: Tue, 18 Nov 1997 15:28:22 -0800 (PST) Reply-To: slee@u.washington.edu Sender: owner-qrp-l@Lehigh.EDU Precedence: bulk From: "S. Lee" To: "Low Power Amateur Radio Discussion" Subject: Re: QRP+ Power Adjustment Shaft In-Reply-To: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII X-To: Barry Keating X-Cc: Low Power Amateur Radio Discussion X-Listprocessor-Version: 8.1 beta -- ListProcessor(tm) by CREN Status: RO A standard wall switch dimmer knob will work fine business. Saw a bunch at Home Depot the other day so it is not necessary to buy the entire dimmer just to get the knob. They have the knob all by its lonesome. Enjoy! de AB7HI, Stephen Lee, Federal Way, WA slee@u.washington.edu On Tue, 18 Nov 1997, Barry Keating wrote: > > The Index QRP+ rig has a nylon shaft on the rear for adjusting the > power level. The shaft is a slotted nylon shaft with grooves down the sides. > > Anyone know of a particular knob for this shaft? > > Barry Keating > WD4MSM From owner-qrp-l@Lehigh.EDU Wed Nov 19 10:55:17 1997 Received: from fidoii.CC.lehigh.EDU (fidoii.CC.lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.8.5/8.8.5) with ESMTP id KAA14981 for ; Wed, 19 Nov 1997 10:55:16 -0500 (EST) Received: from Lehigh.EDU ([127.0.0.1]) by fidoii.cc.Lehigh.EDU with SMTP id <34988-45660>; Wed, 19 Nov 1997 10:54:44 -0500 Received: from nss4.cc.Lehigh.EDU ([128.180.1.13]) by fidoii.cc.Lehigh.EDU with ESMTP id <35103-45660>; Wed, 19 Nov 1997 10:12:51 -0500 Received: from OBIWAN.ENDOR.COM (BABIARZ@obiwan.endor.com [199.103.183.1]) by nss4.cc.Lehigh.EDU (8.8.8/8.8.5) with SMTP id JAA164064 for ; Wed, 19 Nov 1997 09:57:06 -0500 Received: from Gregoire.endor.com [199.103.183.143] by OBIWAN.ENDOR.COM with SMTP-OpenVMS via TCP/IP; Wed, 19 Nov 1997 10:01 EST Message-Id: Date: Wed, 19 Nov 97 09:48:25 PST Reply-To: gregoire@endor.com Sender: owner-qrp-l@Lehigh.EDU Precedence: bulk From: gregoire@endor.com To: "Low Power Amateur Radio Discussion" Subject: RE: QRP+ Power Adjustment Shaft MIME-Version: 1.0 Content-Type: TEXT/PLAIN; CHARSET=us-ascii X-To: Barry.P.Keating.1@nd.edu, Low power amateur radio discusion X-Mailer: Chameleon V0.05, TCP/IP for Windows, NetManage Inc. X-Listprocessor-Version: 8.1 beta -- ListProcessor(tm) by CREN Status: RO Hello Barry, Don't even try. You wont like it. There is a better way. The pot inside that is connected to the shaft in question is a cheap little pot that will not withstand a bump from the outside. this is why there was no knob put on it by the manufacturere. The solution is to replace the pot. Digi key has the pot, and while your at it you might just as well replace the other pot and do an RF gain modification. This mod is easy to do and gives the SCAF much more control. You will be able to isolate signal that would be overwhelmed by strong signals before the mod. I have information about both mods. They were printed in 72, the now defunct New England QRP club news letter. Let me know if you are interested in doing the mod, and I'll get the information to you. 73 de AA1IK, Time the accursed enemy of man, cursed youth for going to slow Ernie Gregoire and by the old for going to fast. R.R. 1, Box 221, South Rd. Fists # 2644,ARCI # 9500 Canaan, NH. 03741 QRP-L # 95, Fly fisher & tier, Promise Keeper. E-mail address: gregoire@endor.com packet address: AA1IK@WA1WOK.FN43FE.NH.USA.NA ------------------------------------- 11/19/97 09:48:25 From owner-qrp-l@Lehigh.EDU Thu Nov 20 00:44:07 1997 Received: from fidoii.CC.lehigh.EDU (fidoii.CC.lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.8.5/8.8.5) with ESMTP id AAA25815 for ; Thu, 20 Nov 1997 00:44:05 -0500 (EST) Received: from Lehigh.EDU ([127.0.0.1]) by fidoii.cc.Lehigh.EDU with SMTP id <35753-32088>; Wed, 19 Nov 1997 23:53:18 -0500 Received: from nss4.cc.Lehigh.EDU ([128.180.1.13]) by fidoii.cc.Lehigh.EDU with ESMTP id <35574-34650>; Wed, 19 Nov 1997 19:17:03 -0500 Received: from krypton.nmr.Hawaii.Edu (krypton.nmr.Hawaii.Edu [128.171.55.13]) by nss4.cc.Lehigh.EDU (8.8.8/8.8.5) with SMTP id RAA105278 for ; Wed, 19 Nov 1997 17:27:06 -0500 Received: by krypton.nmr.Hawaii.Edu (4.1/SMI-4.1) id AA03497; Wed, 19 Nov 97 12:25:20 HST Message-Id: <9711192225.AA03497@krypton.nmr.Hawaii.Edu> Date: Wed, 19 Nov 97 12:25:20 HST Reply-To: mike@krypton.nmr.Hawaii.Edu Sender: owner-qrp-l@Lehigh.EDU Precedence: bulk From: mike@krypton.nmr.Hawaii.Edu (Mike W. Burger) To: "Low Power Amateur Radio Discussion" Subject: Index Labs Mic Question X-Listprocessor-Version: 8.1 beta -- ListProcessor(tm) by CREN Status: RO A friend picked up an Index Labs QRP Plus transciever. It is a serial number in the 250 range. Apparently stock without any mods. He is having a lot of trouble getting a mic to work with it. I suspect he is getting rf feedback into the mic chord, or he is using the wrong impedance mic. The manual does not give much help on this. His signal is very strong on an S-meter, but the audio is very weak and raspy on SSB. All attempts to contact someone at Index labs raises a FAX machine only. Can anyone give me a bit of help on: What mic to use? Why would the audio be strangled, clippy, spastic and rough? How to contact Index Labs and order the mic designed for this unit? AH7R Mike mike@hawaii.edu From owner-qrp-l@Lehigh.EDU Mon Dec 8 12:23:50 1997 Received: from fidoii.CC.lehigh.EDU (fidoii.CC.lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.8.5/8.8.5) with ESMTP id MAA27433 for ; Mon, 8 Dec 1997 12:23:50 -0500 (EST) Received: from Lehigh.EDU ([127.0.0.1]) by fidoii.cc.Lehigh.EDU with SMTP id <35029-50436>; Mon, 8 Dec 1997 12:19:19 -0500 Received: from nss4.cc.Lehigh.EDU ([128.180.1.13]) by fidoii.cc.Lehigh.EDU with ESMTP id <35009-74760>; Mon, 8 Dec 1997 12:15:47 -0500 Received: from camel14.mindspring.com (camel14.mindspring.com [207.69.200.64]) by nss4.cc.Lehigh.EDU (8.8.8/8.8.5) with ESMTP id MAA185614 for ; Mon, 8 Dec 1997 12:15:43 -0500 Received: from billingsleys (user-37kbu3d.dialup.mindspring.com [207.69.248.109]) by camel14.mindspring.com (8.8.5/8.8.5) with SMTP id MAA15412 for ; Mon, 8 Dec 1997 12:15:42 -0500 (EST) Received: by localhost with Microsoft MAPI; Mon, 8 Dec 1997 12:12:02 -0500 Message-Id: <01BD03D2.7D925740.sbillingsley@mindspring.com> Date: Mon, 8 Dec 1997 12:11:28 -0500 Reply-To: sbillingsley@mindspring.com Sender: owner-qrp-l@Lehigh.EDU Precedence: bulk From: Sam Billingsley To: "Low Power Amateur Radio Discussion" Subject: Noise Blanking for QRP+ X-To: "Qrp-L (E-mail)" X-Mailer: Microsoft Internet E-mail/MAPI - 8.0.0.4211 X-Listprocessor-Version: 8.1 beta -- ListProcessor(tm) by CREN Status: RO I have a local QRN problem that does not want to go away (particularily on 40 meters) using my QRP+. My FT757GXII has a Noise Blanker that works fairly well under the same local conditions. I have been looking at the possiblity of adding some IF noise blanking circuitry to the QRP+. There is an IF amp U1 1350? before the SBL-1 Product Detector. Would it make sense to put it there? I have looked at the noise blanker circuit found many of the ARRL Handbooks that shows a little circuit samples some of the IF signal inputted to an IF stage, amplfiies the noise spikes and shuts down the IF stage by effectively shorting out (RF wise) the output of the IF stage during the noise spike. The Handbook circuits are operating at lower IF frequencies <= 9MHz. The QRP+ IF is operating at 50MHz would there be any special considerations because of this? Doug Demaw had an article in a CQ issue (in the last year) that stopped QRN from reaching the reciever by inverting and nulling the noise before it gets to the reciever. Is there at T/R circuitry that I could wrap around this QRN circuit and allow me to operate the QRP+ or any QRP rig in Xcvr mode? Are there any effective AF stage circuits available to accomplish noise cancellation? I use a Timewave DSP filter and that helps some but it does not eliminate it compelety. I have considered moving the antennas (a wire and a vertical " I know these are particularly bad for QRN") to a location that is further away from the street and house. I live on a small city lot so I could move them maybe 30-40 ft further from the road, house and power lines. Any ideas? Sam Billingsley,AE4GX e-mail: sbillingsley@mindspring.COM Atlanta, GA 30342 Wire Antennas, Butternut Vert, AEA Isoloop Ramsey 1w 40 mtr xmtr/rcvr,Index Labs QRP+,HW7, HW8,HW9 Norcal 38s/5w/Tick norcal#2210,MI-QRP#1567,qrp-l#1033,ARCI#9356,G-QRP#9660,ARS#269, NOGA,CQC#454,AK/QRP#308 From owner-qrp-l@Lehigh.EDU Mon Dec 8 13:43:50 1997 Received: from fidoii.CC.lehigh.EDU (fidoii.CC.lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.8.5/8.8.5) with ESMTP id NAA29984 for ; Mon, 8 Dec 1997 13:43:49 -0500 (EST) Received: from Lehigh.EDU ([127.0.0.1]) by fidoii.cc.Lehigh.EDU with SMTP id <35092-50436>; Mon, 8 Dec 1997 13:41:08 -0500 Received: from nss4.cc.Lehigh.EDU ([128.180.1.13]) by fidoii.cc.Lehigh.EDU with ESMTP id <34934-74760>; Mon, 8 Dec 1997 13:33:12 -0500 Received: from krypton.nmr.Hawaii.Edu (krypton.nmr.Hawaii.Edu [128.171.55.13]) by nss4.cc.Lehigh.EDU (8.8.8/8.8.5) with SMTP id NAA196388 for ; Mon, 8 Dec 1997 13:33:03 -0500 Received: by krypton.nmr.Hawaii.Edu (4.1/SMI-4.1) id AA06394; Mon, 8 Dec 97 08:32:09 HST Message-Id: <9712081832.AA06394@krypton.nmr.Hawaii.Edu> Date: Mon, 8 Dec 97 08:32:09 HST Reply-To: mike@krypton.nmr.Hawaii.Edu Sender: owner-qrp-l@Lehigh.EDU Precedence: bulk From: mike@krypton.nmr.Hawaii.Edu (Mike W. Burger) To: "Low Power Amateur Radio Discussion" Subject: QRP+ jack replacement X-To: qrp-l@lehigh.edu X-Listprocessor-Version: 8.1 beta -- ListProcessor(tm) by CREN Status: RO Thanks for all the great help on sorting out the microphone problem on my friends QRP+. Unfortunately part of the problem was a worn out jack on the back of the unit. It is a PC board mount and he finally had to scavange the identical paddles jack and move it over to completely solve the problem. Now he would like to replace the paddles jack. He reports three identical PC jacks on the back, 3.5 mm stereo type jacks, but with a PC footprint that has four pins on the front in a line and one pin on the back. He has found a jack, but it has a different footprint. Usual problems with trying to contact anyone who ever was associated with the company. Trying to contact the company that makes the 2020 gets a report that they no longer have any association with the person who designed the QRP+ and have no contact information. That leaves the jack. Any information on where one might find an identical replacement would be valuable. My friend is into restoring radios and values being able to make things "good as new" without having to cut and past something to fit if at all possible. Thanks in advance, please Email directly: mike@hawaii.edu Mike Burger University of Hawaii at Manoa Department of Chemistry AH7R - QRP-L #1053 - FISTS - BL11ch - Honolulu County From owner-qrp-l@Lehigh.EDU Wed Dec 17 19:51:51 1997 Received: from fidoii.CC.lehigh.EDU (fidoii.CC.lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.8.5/8.8.5) with ESMTP id TAA09705 for ; Wed, 17 Dec 1997 19:51:50 -0500 (EST) Received: from Lehigh.EDU ([127.0.0.1]) by fidoii.cc.Lehigh.EDU with SMTP id <35364-25988>; Wed, 17 Dec 1997 19:50:58 -0500 Received: from nss4.cc.Lehigh.EDU ([128.180.1.13]) by fidoii.cc.Lehigh.EDU with ESMTP id <34921-58752>; Wed, 17 Dec 1997 19:49:54 -0500 Received: from moose.ncia.net (moose.ncia.net [207.140.8.2]) by nss4.cc.Lehigh.EDU (8.8.8/8.8.5) with ESMTP id TAA102040 for ; Wed, 17 Dec 1997 19:49:40 -0500 Received: from LOCALNAME (ncia76l.ncia.net [207.141.177.76]) by moose.ncia.net (8.8.7/8.6.12) with SMTP id TAA25017 for ; Wed, 17 Dec 1997 19:48:48 -0500 (EST) Message-Id: <34989411.4764@ncia.net> Date: Wed, 17 Dec 1997 19:10:09 -0800 Reply-To: terresfm@ncia.net Sender: owner-qrp-l@Lehigh.EDU Precedence: bulk From: Terres Family To: "Low Power Amateur Radio Discussion" Subject: QRP++ EPROM upgrade MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-To: qrp-l list X-Mailer: Mozilla 3.0 (Win16; U) X-Listprocessor-Version: 8.1 beta -- ListProcessor(tm) by CREN Status: RO Does any one know if there is still any way to update the eprom in a Index Labs QRP++? TIA Jerry AA1OF From owner-qrp-l@Lehigh.EDU Sat Dec 20 07:10:28 1997 Received: from fidoii.CC.lehigh.EDU (fidoii.CC.lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.8.5/8.8.5) with ESMTP id HAA02161 for ; Sat, 20 Dec 1997 07:10:27 -0500 (EST) Received: from Lehigh.EDU ([127.0.0.1]) by fidoii.cc.Lehigh.EDU with SMTP id <35090-49454>; Sat, 20 Dec 1997 07:10:13 -0500 Received: from nss4.cc.Lehigh.EDU ([128.180.1.13]) by fidoii.cc.Lehigh.EDU with ESMTP id <35027-49454>; Sat, 20 Dec 1997 07:09:15 -0500 Received: from moose.ncia.net (moose.ncia.net [207.140.8.2]) by nss4.cc.Lehigh.EDU (8.8.8/8.8.5) with ESMTP id HAA119042 for ; Sat, 20 Dec 1997 07:09:09 -0500 Received: from LOCALNAME ([207.141.177.187]) by moose.ncia.net (8.8.7/8.6.12) with SMTP id HAA17071 for ; Sat, 20 Dec 1997 07:08:11 -0500 (EST) Message-Id: <349BEA0B.6ED6@ncia.net> Date: Sat, 20 Dec 1997 07:53:47 -0800 Reply-To: terresfm@ncia.net Sender: owner-qrp-l@Lehigh.EDU Precedence: bulk From: Terres Family To: "Low Power Amateur Radio Discussion" Subject: index labs eprom upgrade MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-To: qrp-l list X-Mailer: Mozilla 3.0 (Win16; U) X-Listprocessor-Version: 8.1 beta -- ListProcessor(tm) by CREN Status: RO Does any one know if there is still any way to update the eprom in a Index Labs QRP++? Or any way to actually get in touch with them? TIA Jerry AA1OF From owner-qrp-l@Lehigh.EDU Thu Jan 8 16:37:13 1998 Received: from fidoii.CC.lehigh.EDU (fidoii.CC.lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.8.5/8.8.5) with ESMTP id QAA23183 for ; Thu, 8 Jan 1998 16:37:12 -0500 (EST) Received: from Lehigh.EDU ([127.0.0.1]) by fidoii.cc.Lehigh.EDU with SMTP id <13051-53318>; Thu, 8 Jan 1998 16:36:29 -0500 Received: from nss4.cc.Lehigh.EDU ([128.180.1.13]) by fidoii.cc.Lehigh.EDU with ESMTP id <12891-59466>; Thu, 8 Jan 1998 16:35:11 -0500 Received: from server1.ictnet.es (server1.ictnet.es [195.77.176.5]) by nss4.cc.Lehigh.EDU (8.8.8/8.8.5) with ESMTP id QAA05876 for ; Thu, 8 Jan 1998 16:35:03 -0500 Received: from LOCALNAME ([195.77.177.167]) by server1.ictnet.es (Netscape Mail Server v2.02) with SMTP id AAA96 for ; Thu, 8 Jan 1998 22:32:44 +0100 Message-Id: <34B5CFC9.4D31@eic.ictnet.es> Date: Thu, 08 Jan 1998 23:20:41 -0800 Reply-To: vllario@eic.ictnet.es Sender: owner-qrp-l@Lehigh.EDU Precedence: bulk From: vllario@eic.ictnet.es (Vicenc Llario i Zarzoso) To: "Low Power Amateur Radio Discussion" Subject: QRP Plus performance MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7BIT X-Mailer: Mozilla 3.01C-NSCP (Win16; I) X-Listprocessor-Version: 8.1 beta -- ListProcessor(tm) by CREN Status: RO Hi gang! Firs of all thank you very much to all those who answered my previous correspondence to the list not only for the OHR Classic info but also to say "Merry Christmas". Anyway here comes my question. During my short Xmas holidays in EA6 I loaned my QRP Plus with serial number 1376 (one of the fist rigs of the second release) to a friend of mine who wanted to perform some RX tests. The fact is that he wrote me a nice report in which he pointed out that the figures he had obtained seemed to be quite a lot noise dependent. In other words, he told me that the rig probably suffered from synthesizer phase noise. He had to perform the tests with 30Khz spacing instead of 20Khz because of noise. Here come the figures he obtained with my QRP ++. 80m 40m 20m 15m 10m MDS -117dB -117dB -118dB -118dB -115dB Blocking D.R. 98dB 93dB 89dB 89dB 89dB IMD D.R. 84dB 85dB 87dB 85dB 83dB When comparing the above figures with the ones of the Product Review in QST September 1996 I realised that my rig was obviously a little bit ill. The fact is tha Dave Newkirk reports that some of the rigs Index set for testing exhibited similar figures and that the culprit was synthesizer phase noise. I wonder if someone in the list has experienced a similar "feeling" and has any remedies to cure my "Local Oscillator Board" phase noise which I suppose must not be the only one. Any comments or suggestions will be welcome. Please be so kind of replying to my own E-mail and probably as well to the list as far as some other users may be aware of the same problem. If someone has any "original" mod suggested by Index Labs I would appreciate to have it. I had already to change R5 and R33 on the AF Board as far as they had wrong values. Thank you in advance to all for your kind cooperation and help. Vicen , EA3ADV QRP EA-QRP # 4 G-QRP # 7384 ARCI # 8454 From owner-qrp-l@Lehigh.EDU Mon Jan 19 14:35:50 1998 Received: from fidoii.CC.lehigh.EDU (fidoii.CC.lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.8.5/8.8.5) with ESMTP id OAA25137 for ; Mon, 19 Jan 1998 14:35:49 -0500 (EST) Received: from Lehigh.EDU ([127.0.0.1]) by fidoii.cc.Lehigh.EDU with SMTP id <13409-25912>; Mon, 19 Jan 1998 14:35:17 -0500 Received: from nss4.cc.Lehigh.EDU ([128.180.1.13]) by fidoii.cc.Lehigh.EDU with ESMTP id <13383-20022>; Mon, 19 Jan 1998 14:34:17 -0500 Received: from server1.ictnet.es (server1.ictnet.es [195.77.176.5]) by nss4.cc.Lehigh.EDU (8.8.8/8.8.5) with ESMTP id OAA66086 for ; Mon, 19 Jan 1998 14:34:07 -0500 Received: from LOCALNAME ([195.77.177.52]) by server1.ictnet.es (Netscape Mail Server v2.02) with SMTP id AAA22506 for ; Mon, 19 Jan 1998 20:31:45 +0100 Message-Id: <34C437C2.270D@eic.ictnet.es> Date: Mon, 19 Jan 1998 21:36:02 -0800 Reply-To: vllario@eic.ictnet.es Sender: owner-qrp-l@Lehigh.EDU Precedence: bulk From: vllario@eic.ictnet.es (Vicenc Llario i Zarzoso) To: "Low Power Amateur Radio Discussion" Subject: QRP Plus performance figures once more MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7BIT X-Mailer: Mozilla 3.01C-NSCP (Win16; I) X-Listprocessor-Version: 8.1 beta -- ListProcessor(tm) by CREN Status: RO Hi gang! Here I am again after a few days waiting for some advice. Anyway, only two answers from the QRP-L saying something like "take it easy" or "you are not going to get help from Index". I faxed twice the info I reported to the list to Index Labs and until now there has been no reaction. On the other hand, I posted the same message to the G-QRP-L and Sheldon Hands from Hands Electronics came back with some advice with regard to LO level to the passive ring mixer, decoupling, etc. Having a look to the schematics on the Plus manual I realised that the only PC boards that seemed to have been modified were the AF board and the RF board which I think is not at all true. I wonder if someone has a manual with updated schematics of the Plus to check the values of the components which must influence a reasonable performance of my rig. Sheldon told me that the figures of my test would correspond to a rather well designed NE602 based rig. What a pitty!. As far as I am also member of the ARCI, I am aware of the mods reported by Larry East, but I believe that they are not going to cure my rig. If someone has any comments or suggestions, please repply to my E-mail at vllario@eic.ictnet.es Thanks in advance for the cooperation and help and best 72 Vicen , EA3ADV QRP EA-QRP # 4 G-QRP # 7384 ARCI # 8454 From owner-qrp-l@Lehigh.EDU Tue Jan 20 12:17:37 1998 Received: from fidoii.CC.lehigh.EDU (fidoii.CC.lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.8.5/8.8.5) with ESMTP id MAA15168 for ; Tue, 20 Jan 1998 12:17:36 -0500 (EST) Received: from Lehigh.EDU ([127.0.0.1]) by fidoii.cc.Lehigh.EDU with SMTP id <12495-22060>; Tue, 20 Jan 1998 12:17:20 -0500 Received: from nss4.cc.Lehigh.EDU ([128.180.1.13]) by fidoii.cc.Lehigh.EDU with ESMTP id <12462-18730>; Tue, 20 Jan 1998 12:16:05 -0500 Received: from ccs.lmco.com (cos2.ccs.lmco.com [158.185.53.2]) by nss4.cc.Lehigh.EDU (8.8.8/8.8.5) with SMTP id MAA36460 for ; Tue, 20 Jan 1998 12:16:01 -0500 Received: from cse100.ccs.lmco.com by ccs.lmco.com (SMI-8.6/WDL-5.0) id KAA11308; Tue, 20 Jan 1998 10:15:21 -0700 Received: from cse107.ccs.lmco.com by cse100.ccs.lmco.com (SMI-8.6/SMI-SVR4) id KAA20314; Tue, 20 Jan 1998 10:12:11 -0700 Received: from cse107 by cse107.ccs.lmco.com (SMI-8.6/SMI-SVR4) id KAA00593; Tue, 20 Jan 1998 10:07:19 -0700 Message-Id: <34C4D9C6.2E7B@ccs.lmco.com> Date: Tue, 20 Jan 1998 10:07:18 -0700 Reply-To: cpetry@ccs.lmco.com Sender: owner-qrp-l@Lehigh.EDU Precedence: bulk From: pete petry To: "Low Power Amateur Radio Discussion" Subject: Index Laboratories and also parts and pieces... MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-Sender: cpetry@ccs.lmco.com X-Mailer: Mozilla 3.01 (X11; U; SunOS 5.5.1 sun4u) X-Listprocessor-Version: 8.1 beta -- ListProcessor(tm) by CREN Status: RO Hello-- I find that I am to be the new owner of an Index Laboratories QRP+. I have tried calling the Index Labs TelNo and got a modem in my ear. Is there anyone who has current info on the status of Index Laboratories and what services, upgrades, repairs are still available? One of my friends recalls that someone purchased the (parts and pieces) inventory of Index Labs. Does anyone know who? And how to get in tough with them? This list has been a wonderful thing for me. Thank you to the list owners and another thank you to the list members. 72, -- Pete Petry/WD4DHR Lockheed-Martin Command & Control Systems 9970 Federal Drive Colorado Springs, CO 80921 719-594-1265 (v) Email: cpetry@ccs.lmco.com From owner-qrp-l@Lehigh.EDU Tue Jan 20 12:35:54 1998 Received: from fidoii.CC.lehigh.EDU (fidoii.CC.lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.8.5/8.8.5) with ESMTP id MAA16611 for ; Tue, 20 Jan 1998 12:35:52 -0500 (EST) Received: from Lehigh.EDU ([127.0.0.1]) by fidoii.cc.Lehigh.EDU with SMTP id <12734-22060>; Tue, 20 Jan 1998 12:34:56 -0500 Received: from nss4.cc.Lehigh.EDU ([128.180.1.13]) by fidoii.cc.Lehigh.EDU with ESMTP id <12701-18730>; Tue, 20 Jan 1998 12:31:49 -0500 Received: from x3.boston.juno.com (x3.boston.juno.com [205.231.100.22]) by nss4.cc.Lehigh.EDU (8.8.8/8.8.5) with ESMTP id MAA72364 for ; Tue, 20 Jan 1998 12:31:45 -0500 Received: (from n7mfb@juno.com) by x3.boston.juno.com (queuemail) id MuE00781; Tue, 20 Jan 1998 12:31:12 EST Message-Id: <19980120.093005.4543.1.n7mfb@juno.com> Date: Tue, 20 Jan 1998 12:31:12 EST Reply-To: n7mfb@juno.com Sender: owner-qrp-l@Lehigh.EDU Precedence: bulk From: n7mfb@juno.com (Bill Todd) To: "Low Power Amateur Radio Discussion" Subject: Re: Index Laboratories and also parts and pieces... References: <34C4D9C6.2E7B@ccs.lmco.com> X-To: cpetry@ccs.lmco.com X-Cc: qrp-l@Lehigh.EDU, bg783@scn.org X-Mailer: Juno 1.15 X-Juno-Line-Breaks: 1-10,13-14,17-21 X-Listprocessor-Version: 8.1 beta -- ListProcessor(tm) by CREN Status: RO On Tue, 20 Jan 1998 10:07:18 -0700 pete petry writes: >Hello-- > > I find that I am to be the new owner of an Index Laboratories QRP+. >I have tried calling the Index Labs TelNo and got a modem in my ear. Is >there anyone who has current info on the status of Index Laboratories >and what services, upgrades, repairs are still available? Hello Pete - I know of a guy who can do qualified repairs to the QRP+ rigs. Stan, K7SY was the Senior Test Tech at Index Labs, and does repairs on those radios. I am sure you have heard that Index is now out of business - and Stan has no further connection with the company. But, he is a good technical person, and should be able to help you if you need some repair work. His E-mail address is: bg783@scn.org CUL, Bill-N7MFB From owner-qrp-l@lehigh.edu Wed Mar 4 14:24:35 1998 Received: from fidoii.CC.lehigh.EDU (fidoii.CC.lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.8.5/8.8.5) with ESMTP id OAA12120 for ; Wed, 4 Mar 1998 14:24:32 -0500 (EST) Received: from Lehigh.EDU ([127.0.0.1]) by fidoii.cc.Lehigh.EDU with SMTP id <13085-52324>; Wed, 4 Mar 1998 14:23:41 -0500 Received: from nss4.cc.Lehigh.EDU ([128.180.1.13]) by fidoii.cc.Lehigh.EDU with ESMTP id <13066-52324>; Wed, 4 Mar 1998 14:22:32 -0500 Received: from [208.222.36.34] ([208.222.36.34]) by nss4.cc.Lehigh.EDU (8.8.8/8.8.5) with SMTP id OAA83344 for ; Wed, 4 Mar 1998 14:21:50 -0500 Received: from MAILSERVER1 by [208.222.36.34] via smtpd (for nss4.CC.Lehigh.EDU [128.180.1.13]) with SMTP; 4 Mar 1998 19:16:40 UT Received: by MAILSERVER1 with Internet Mail Service (5.0.1458.49) id <16YZYZQA>; Wed, 4 Mar 1998 14:25:25 -0500 Message-Id: <21E06269B00ED111BE9B00805F6D0FA319A6E4@MAILSERVER1> Date: Wed, 4 Mar 1998 14:25:23 -0500 Reply-To: SBillingsley@usaninc.com Sender: owner-qrp-l@lehigh.edu Precedence: bulk From: Sam Billingsley To: "Low Power Amateur Radio Discussion" Subject: Drifting Index Labs QRP+ MIME-Version: 1.0 Content-Type: text/plain X-To: "Qrp-L (E-mail)" X-Priority: 3 X-Mailer: Internet Mail Service (5.0.1458.49) X-Listprocessor-Version: 8.1 beta -- ListProcessor(tm) by CREN Status: RO Does anyone with an QRP+ or QRP++(my original version has serial #928) have a drift problem? From a cold start my QRP+ drifts about 100HZ per 10 minutes for at least 30-40 minutes. It then slows down. Anyone notice this condition? I saw in an old QST review that they mentioned that thier test QRP++ unit drifted about 200 HZ. Besides leaving it on or prewarming it for an hour is there anything I can do? I think its weird that a xtal controlled synthesized unit drifts this much. By the way, the QRP+ uses a "Motorola 145156 IC and a dual modulus prescaler. The reference frequency is 4 MHZ. The synthesizer uses 2KHZ steps. Intermediate steps of approx. 10 HZ are proived by controlling the reference freq. wih a D/A converter from the microprocessor".(This is from the owner's manual). Elmer........Help!!! I am a DIGEST mode user. Sam Billingsley,AE4GX e-mail: sbillingsley@usaninc.COM Atlanta, GA Wire Antennas, Butternut Vert, AEA Isoloop Ramsey 1w 40 mtr xmtr/rcvr,Index Labs QRP+,HW7, HW8,HW9 Norcal 38s/5w/Tick, (working on PIXIE2) NORCAL 2210, MI-QRP 1567, QRP-L 1033, ARCI 9356, AK/QRP #308 G-QRP 9660, ARS 269, NOGA , CQC 454 From owner-qrp-l@Lehigh.EDU Mon Apr 6 22:02:32 1998 Received: from fidoii.CC.lehigh.EDU (fidoii.CC.lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.8.5/8.8.5) with ESMTP id WAA21936 for ; Mon, 6 Apr 1998 22:02:31 -0400 (EDT) Received: from Lehigh.EDU ([127.0.0.1]) by fidoii.cc.Lehigh.EDU with SMTP id <13225-69320>; Mon, 6 Apr 1998 22:00:24 -0400 Received: from nss4.cc.Lehigh.EDU ([128.180.1.13]) by fidoii.cc.Lehigh.EDU with ESMTP id <13172-66242>; Mon, 6 Apr 1998 21:59:07 -0400 Received: from willapabay.org (willapabay.org [206.251.79.3]) by nss4.cc.Lehigh.EDU (8.8.8/8.8.5) with ESMTP id VAA62804 for ; Mon, 6 Apr 1998 21:59:01 -0400 Received: from Pbill (ray17.willapabay.org [206.251.79.37]) by willapabay.org (8.8.5/8.8.5) with SMTP id TAA05619; Mon, 6 Apr 1998 19:19:39 -0700 Message-Id: <1.5.4.32.19980407015130.0070e108@willapabay.org> Date: Mon, 06 Apr 1998 18:51:30 -0700 Reply-To: bill@willapabay.org Sender: owner-qrp-l@Lehigh.EDU Precedence: bulk From: Bill Todd To: "Low Power Amateur Radio Discussion" Subject: QRP+ Repairs? Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" X-To: kelman@dialnet.net X-Cc: qrp-l@Lehigh.EDU X-Sender: bill@willapabay.org X-Mailer: Windows Eudora Light Version 1.5.4 (32) X-Listprocessor-Version: 8.1 beta -- ListProcessor(tm) by CREN Status: RO >Hello all, >Is there anywhere to get parts for the Index Labs QRP Plus or any where a >person could get one serviced if >needed? You can check with Stan, K7SY in Seattle, who used to be the main technician at Index Labs (who built the QRP+). I understand that Stan does work on QRP+ rigs, though I do not know what he has in the way of extra parts. You can contact Stan at: bg783@scn.org CUL, Bill-N7MFB http://www.willapabay.com/~bill ICQ me at #8926298 From owner-qrp-l@Lehigh.EDU Tue Apr 14 22:03:44 1998 Received: from fidoii.CC.lehigh.EDU (fidoii.CC.lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.8.5/8.8.5) with ESMTP id WAA07243 for ; Tue, 14 Apr 1998 22:03:42 -0400 (EDT) Received: from Lehigh.EDU ([127.0.0.1]) by fidoii.cc.Lehigh.EDU with SMTP id <13163-29262>; Tue, 14 Apr 1998 22:02:58 -0400 Received: from nss4.cc.Lehigh.EDU ([128.180.1.13]) by fidoii.cc.Lehigh.EDU with ESMTP id <12574-29262>; Tue, 14 Apr 1998 22:01:59 -0400 Received: from mpdr0.detroit.mi.ameritech.net (mpdr0.detroit.mi.ameritech.net [206.141.239.206]) by nss4.cc.Lehigh.EDU (8.8.8/8.8.5) with ESMTP id WAA51024 for ; Tue, 14 Apr 1998 22:01:51 -0400 Received: from ameritech.net ([206.141.238.94]) by mpdr0.detroit.mi.ameritech.net (InterMail v03.02.01 118 111) with ESMTP id <19980415030030.EPPW7034@ameritech.net> for ; Tue, 14 Apr 1998 22:00:30 -0500 Message-Id: <35340755.D1CE980A@ameritech.net> Date: Wed, 15 Apr 1998 02:03:17 +0000 Reply-To: waltk8cv@ameritech.net Sender: owner-qrp-l@Lehigh.EDU Precedence: bulk From: Walt Amos To: "Low Power Amateur Radio Discussion" Subject: qrp++ if gain mod MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-To: Qrp-l List X-Mailer: Mozilla 4.04 [en]C-AIT (Win95; I) X-Listprocessor-Version: 8.1 beta -- ListProcessor(tm) by CREN Status: RO Hi........ I did the factory recommended mod to the qrp++ to stop overload in contests! Ah, you say, what is he talking about! They put a + voltage on U7 pin 4 on the audio board. Second board down! It seems to be doing the trick. You can reduce the IF gain so much the receiver goes DEAD! Now that's getting rid of IMD .......... :-) Seriously , with the s meter pointer set at s-7 or s-9 with the new IF gain pot the receiver does NOT seem to overload. This weekend is the MICHIGAN QSO PARTY and will know more after that and RUN FOR THE BORDER the next weekend. This seems to make a new radio out of an old one, will see! Walt k8cv From owner-qrp-l@Lehigh.EDU Mon Apr 20 09:08:57 1998 Received: from fidoii.CC.lehigh.EDU (fidoii.CC.lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.8.5/8.8.5) with ESMTP id JAA07560 for ; Mon, 20 Apr 1998 09:08:56 -0400 (EDT) Received: from Lehigh.EDU ([127.0.0.1]) by fidoii.cc.Lehigh.EDU with SMTP id <13150-62518>; Mon, 20 Apr 1998 09:08:36 -0400 Received: from nss4.cc.Lehigh.EDU ([128.180.1.13]) by fidoii.cc.Lehigh.EDU with ESMTP id <13141-44604>; Mon, 20 Apr 1998 09:07:13 -0400 Received: from server.nich.edu (SERVER.NICH.EDU [198.51.92.2]) by nss4.cc.Lehigh.EDU (8.8.8/8.8.5) with SMTP id JAA24996 for ; Mon, 20 Apr 1998 09:07:09 -0400 Received: by server.nich.edu (5.57/Ultrix3.0-C) id AA01804; Mon, 20 Apr 98 08:02:29 -0500 Received: from NICH-NSUNET/SpoolDir by nich-nsunet.nich.edu (Mercury 1.31); 20 Apr 98 08:06:56 -0600 Received: from SpoolDir by NICH-NSUNET (Mercury 1.31); 20 Apr 98 08:06:46 -0600 Message-Id: <197C0B11DE5@nich-nsunet.nich.edu> Date: Mon, 20 Apr 1998 08:06:37 -0600 Reply-To: cs-erh@nich-nsunet.nich.edu Sender: owner-qrp-l@Lehigh.EDU Precedence: bulk From: "Evert R. Halbach" To: "Low Power Amateur Radio Discussion" Subject: QRP+ question Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7BIT X-Mailer: Pegasus Mail for Windows (v2.42a) X-Listprocessor-Version: 8.1 beta -- ListProcessor(tm) by CREN Status: RO Hello All! While playing around with the LDG qrp automatic antenna tuner this week, my power output crashed. It seems as though I can now only get about 1 watt out of the rig. I never had any problems while using an "almost dead" car battery. However, I tried using a regulated 12 volt supply to get a little more power out of it right before it went out. I noticed that I did get about 7 watts out on cw before the problem. Has this happened to anyone? Did I possibly "push" it too hard? I measured output of power supply and all seems to be ok. After opening the cover of the QRP+ and seeing the location of the final, I closed it back up. I am thinking about getting it shipped off for repair and possibly upgrade. Does anyone have estimated prices on upgrades and are they packaged deals or individual upgrades? Wouldn't mind spending a few dollars but can't invest too much in this project. Has anyone changed the final and what was cost of it?? Any information, assistance, .02 cents would be appreciated. Please e-mail direct. Thanks es 73 de WA5OJI Evert Evert R. Halbach WA5OJI Internet - cs-erh@nich-nsunet.nich.edu Phone - (504) 448-4993 Snail - P.O. Box 2168 Thibodaux, La. 70310 Home - 117 Sawmill Rd., Thibodaux, La. 70301 From owner-qrp-l@Lehigh.EDU Tue Apr 28 04:16:47 1998 Received: from fidoii.CC.lehigh.EDU (fidoii.CC.lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.8.5/8.8.5) with ESMTP id EAA17363 for ; Tue, 28 Apr 1998 04:16:45 -0400 (EDT) Received: from Lehigh.EDU ([127.0.0.1]) by fidoii.cc.Lehigh.EDU with SMTP id <12971-54144> convert rfc822-to-8bit; Tue, 28 Apr 1998 04:16:31 -0400 Received: from nss4.cc.Lehigh.EDU ([128.180.1.13]) by fidoii.cc.Lehigh.EDU with ESMTP id <12551-33666>; Tue, 28 Apr 1998 04:15:17 -0400 Received: from proxy4.ba.best.com (root@proxy4.ba.best.com [206.184.139.15]) by nss4.cc.Lehigh.EDU (8.8.8/8.8.5) with ESMTP id EAA56922 for ; Tue, 28 Apr 1998 04:15:08 -0400 Received: from radman.vip.best.com (radman.vip.best.com [206.86.221.148]) by proxy4.ba.best.com (8.8.8/8.8.BEST) with SMTP id BAA26769 for ; Tue, 28 Apr 1998 01:13:28 -0700 (PDT) Received: by radman.vip.best.com with Microsoft Mail id <01BD7242.FBBFC920@radman.vip.best.com>; Tue, 28 Apr 1998 01:14:25 -0700 Message-Id: <01BD7242.FBBFC920@radman.vip.best.com> Date: Tue, 28 Apr 1998 01:14:23 -0700 Reply-To: radman@best.com Sender: owner-qrp-l@Lehigh.EDU Precedence: bulk From: Conrad To: "Low Power Amateur Radio Discussion" Subject: Index QRP+ Support... MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 8BIT X-To: Low Power Amateur Radio Discussion X-Listprocessor-Version: 8.1 beta -- ListProcessor(tm) by CREN Status: RO I had long phone chat today with Bruce Franklin, designer of the Index Labs QRP+ and, he asked that I pass along to the group the following info regarding customer support of the now-discontinued Index Labs QRP+ rigs: Please contact: Stan Yarema / K7SY - Seattle, WA. Phone: 206-285-8941 for support/parts, etc. (Sorry, I don't have an email for Stan.) Stan - per Bruce Franklin - has entirely taken over the support of the Index Labs QRP+. Index Labs, with Bruce Franklin at the helm, is still going strong but, they're on a completely new mission. I'll post that story later today. (It's interesting!) 72 - Conrad Weiss - NN6CW From owner-qrp-l@Lehigh.EDU Fri Jul 24 22:36:55 1998 Received: from fidoii.CC.lehigh.EDU (fidoii.CC.lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.8.5/8.8.5) with ESMTP id WAA11264 for ; Fri, 24 Jul 1998 22:36:54 -0400 (EDT) Received: from Lehigh.EDU ([127.0.0.1]) by fidoii.cc.Lehigh.EDU with SMTP id <13471-55278>; Fri, 24 Jul 1998 22:35:45 -0400 Received: from nss4.cc.Lehigh.EDU ([128.180.1.13]) by fidoii.cc.Lehigh.EDU with ESMTP id <12569-51692>; Fri, 24 Jul 1998 21:32:34 -0400 Received: from imo14.mx.aol.com (imo14.mx.aol.com [198.81.17.4]) by nss4.cc.Lehigh.EDU (8.8.8/8.8.5) with ESMTP id VAA36602 for ; Fri, 24 Jul 1998 21:32:21 -0400 Received: from W8tj@aol.com by imo14.mx.aol.com (IMOv14_b1.1) id FAKBa13455 for ; Fri, 24 Jul 1998 21:31:49 +2000 (EDT) Message-Id: <2bd046e4.35b93586@aol.com> Date: Fri, 24 Jul 1998 21:31:49 EDT Reply-To: W8tj@aol.com Sender: owner-qrp-l@Lehigh.EDU Precedence: bulk From: W8tj@aol.com To: "Low Power Amateur Radio Discussion" Subject: QRP++ Mime-Version: 1.0 Content-type: text/plain; charset=US-ASCII Content-transfer-encoding: 7bit X-Mailer: AOL 3.0 for Windows 95 sub 49 X-Listprocessor-Version: 8.1 beta -- ListProcessor(tm) by CREN Status: RO Greetings gang, I have a QRP++ that just lately has begun to act strangely in that after it has been off and turned on all the preset memories are gone and strange random frequencies appear in their place. Also, the bandwith settings and keyer speed settings are also all different from what they had been when last set and the rig turned off. I suspect the lithium battery in that it should normally hold the memories, but was wondering if it also would cause the problem with the bandwith and keyer settings. If anyone has experienced similar qrp++ behavior I would appreciate hearing from you. Also, by chance, does anyone know who if anyone now services the rigs? Any info would be appreciated. Many thanks and 73 Tom, W8TJ From owner-qrp-l@Lehigh.EDU Fri Jul 24 23:49:00 1998 Received: from fidoii.CC.lehigh.EDU (fidoii.CC.lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.8.5/8.8.5) with ESMTP id XAA12460 for ; Fri, 24 Jul 1998 23:48:59 -0400 (EDT) Received: from Lehigh.EDU ([127.0.0.1]) by fidoii.cc.Lehigh.EDU with SMTP id <14013-51692>; Fri, 24 Jul 1998 23:46:51 -0400 Received: from nss4.cc.Lehigh.EDU ([128.180.1.13]) by fidoii.cc.Lehigh.EDU with ESMTP id <12774-41704>; Fri, 24 Jul 1998 23:02:07 -0400 Received: from client.alltel.net (client.alltel.net [166.102.165.31]) by nss4.cc.Lehigh.EDU (8.8.8/8.8.5) with ESMTP id XAA38914 for ; Fri, 24 Jul 1998 23:02:04 -0400 Received: from alltel.net (fsar2pp27.alltel.net [166.102.155.28]) by client.alltel.net (8.9.0/ALLTEL Messageing Server) with ESMTP id WAA12614; Fri, 24 Jul 1998 22:02:01 -0500 (CDT) Message-Id: <35B94AEF.6BE290C8@alltel.net> Date: Fri, 24 Jul 1998 22:03:11 -0500 Reply-To: w5jay@alltel.net Sender: owner-qrp-l@Lehigh.EDU Precedence: bulk From: Jay Bromley To: "Low Power Amateur Radio Discussion" Subject: Re: QRP++ References: <2bd046e4.35b93586@aol.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-To: W8tj@aol.com X-Cc: Low Power Amateur Radio Discussion X-Mailer: Mozilla 4.04 [en] (Win95; U) X-Listprocessor-Version: 8.1 beta -- ListProcessor(tm) by CREN Status: RO Yep its the battery. Use a nonmetallic tool to remove and replace so not to short out battery. Be sure to do a reset on microprocessor after replacement. 73 de w5jay W8tj@aol.com wrote: > Greetings gang, > > I have a QRP++ that just lately has begun to act strangely in that after it > has been off and turned on all the preset memories are gone and strange random > frequencies appear in their place. Also, the bandwith settings and keyer > speed settings are also all different from what they had been when last set > and the rig turned off. > > I suspect the lithium battery in that it should normally hold the memories, > but was wondering if it also would cause the problem with the bandwith and > keyer settings. > > If anyone has experienced similar qrp++ behavior I would appreciate hearing > from you. Also, by chance, does anyone know who if anyone now services the > rigs? > > Any info would be appreciated. > > Many thanks and 73 > Tom, W8TJ From owner-qrp-l@Lehigh.EDU Sat Jul 25 01:00:36 1998 Received: from fidoii.CC.lehigh.EDU (fidoii.CC.lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.8.5/8.8.5) with ESMTP id BAA13615 for ; Sat, 25 Jul 1998 01:00:35 -0400 (EDT) Received: from Lehigh.EDU ([127.0.0.1]) by fidoii.cc.Lehigh.EDU with SMTP id <13151-59672>; Sat, 25 Jul 1998 00:59:29 -0400 Received: from nss4.cc.Lehigh.EDU ([128.180.1.13]) by fidoii.cc.Lehigh.EDU with ESMTP id <12469-65306>; Sat, 25 Jul 1998 00:08:52 -0400 Received: from smtp02.primenet.com (daemon@smtp02.primenet.com [206.165.6.132]) by nss4.cc.Lehigh.EDU (8.8.8/8.8.5) with ESMTP id AAA49398 for ; Sat, 25 Jul 1998 00:08:36 -0400 Received: (from daemon@localhost) by smtp02.primenet.com (8.8.8/8.8.8) id VAA12241 for ; Fri, 24 Jul 1998 21:08:35 -0700 (MST) Received: from usr07.primenet.com(206.165.6.207) via SMTP by smtp02.primenet.com, id smtpd012227; Fri Jul 24 21:08:33 1998 Received: (from vole@localhost) by usr07.primenet.com (8.8.5/8.8.5) id VAA25271 for qrp-l@Lehigh.EDU; Fri, 24 Jul 1998 21:08:32 -0700 (MST) Message-Id: <199807250408.VAA25271@usr07.primenet.com> Date: Fri, 24 Jul 1998 21:08:32 -0700 (MST) Reply-To: vole@primenet.com Sender: owner-qrp-l@Lehigh.EDU Precedence: bulk From: Joe Gervais To: "Low Power Amateur Radio Discussion" Subject: QRP++ X-Listprocessor-Version: 8.1 beta -- ListProcessor(tm) by CREN Status: RO Howdy Tom and Folks, Tom (W8TJ) wrote: > > I have a QRP++ that just lately has begun to act strangely in > that after it has been off and turned on all the preset memories > are gone and strange random frequencies appear in their place. > [ ... ] > I suspect the lithium battery in that it should normally hold the > memories, but was wondering if it also would cause the problem > with the bandwith and keyer settings. Yep, sure would (as I recall). Same thing happened to mine. To keep you sane until you can replace the battery, you can hold in one of the buttons on power- up ('store' button?) and it will at least default to some sane QRP freqs. I think my QRP+ suffered the dread "deaf/mute" Static Overload Death. If any of you have fixed this problem, or know of any good sources of info relating, please let me know! After bagging 44 Fox Pelts last season with the beast, I'm kind of attached to it. Would like to see it happy again. :-( Thanks! Cheers de AB7TT, -Joe, vole@primenet.com, AZ ScQRPions (Phoenix) "If it ain't fun, you ain't doin' it right!" -The AZ ScQRPions From owner-qrp-l@Lehigh.EDU Sat Jul 25 11:00:03 1998 Received: from fidoii.CC.lehigh.EDU (fidoii.CC.lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.8.5/8.8.5) with ESMTP id LAA06189 for ; Sat, 25 Jul 1998 11:00:02 -0400 (EDT) Received: from Lehigh.EDU ([127.0.0.1]) by fidoii.cc.Lehigh.EDU with SMTP id <13784-64540>; Sat, 25 Jul 1998 10:59:13 -0400 Received: from nss4.cc.Lehigh.EDU ([128.180.1.13]) by fidoii.cc.Lehigh.EDU with ESMTP id <13775-65306>; Sat, 25 Jul 1998 10:56:36 -0400 Received: from mailgate.telusplanet.net (mailgate.telusplanet.net [199.185.220.53]) by nss4.cc.Lehigh.EDU (8.8.8/8.8.5) with ESMTP id KAA36400 for ; Sat, 25 Jul 1998 10:55:46 -0400 Received: from clgrps05.agt.net ([198.161.156.16]:43239 "EHLO clgrps05.agt.net" ident: "IDENT-NOT-QUERIED [port 43239]") by mailgate.telusplanet.net with ESMTP id <51953-8087>; Sat, 25 Jul 1998 08:55:35 -0600 Received: from agt.net ([209.115.190.54]) by mail.telusplanet.net with ESMTP id <267945-13427>; Sat, 25 Jul 1998 08:55:08 -0600 Message-Id: <35B9F135.D692E027@agt.net> Date: Sat, 25 Jul 1998 08:52:37 -0600 Reply-To: ve6kbs@AGT.NET Sender: owner-qrp-l@Lehigh.EDU Precedence: bulk From: "Karl B. Staddon" To: "Low Power Amateur Radio Discussion" Subject: Re: QRP++ References: <199807250408.VAA25271@usr07.primenet.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-To: vole@primenet.com X-Cc: Low Power Amateur Radio Discussion X-Mailer: Mozilla 4.05 [en] (Win95; I; 16bit) X-Listprocessor-Version: 8.1 beta -- ListProcessor(tm) by CREN Status: RO Joe I had a similar problem with my first QRP+. As I recall the solution was to loosen the four bolts that hold the PCB's together, and adjust the board with the KEY/PADDLE recepticals so that the receptical are flush with the outside of the radio. The fix allowed the paddle plug to be inserted fully without shorting; the radio worked fine afterwards. HOWEVER, perhaps you can help me. I've got a ZM-2 antenna tuner and it seems to make the radio deaf when I use it in SSB. Any suggestions?? Cheers de KARL, VE6KBS, CALGARY, AB Joe Gervais wrote: > > > I think my QRP+ suffered the dread "deaf/mute" Static > Overload Death. If any of you have fixed this problem, > or know of any good sources of info relating, please > let me know! After bagging 44 Fox Pelts last season > with the beast, I'm kind of attached to it. Would like > to see it happy again. :-( Thanks! > > Cheers de AB7TT, > > -Joe, vole@primenet.com, AZ ScQRPions (Phoenix) > > "If it ain't fun, you ain't doin' it right!" -The AZ ScQRPions From owner-qrp-l@Lehigh.EDU Sun Jul 26 18:42:11 1998 Received: from fidoii.CC.lehigh.EDU (fidoii.CC.lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.8.5/8.8.5) with ESMTP id SAA20056 for ; Sun, 26 Jul 1998 18:42:10 -0400 (EDT) Received: from Lehigh.EDU ([127.0.0.1]) by fidoii.cc.Lehigh.EDU with SMTP id <13486-26870>; Sun, 26 Jul 1998 18:41:47 -0400 Received: from nss4.cc.Lehigh.EDU ([128.180.1.13]) by fidoii.cc.Lehigh.EDU with ESMTP id <12448-26870>; Sun, 26 Jul 1998 18:40:21 -0400 Received: from imo15.mx.aol.com (imo15.mx.aol.com [198.81.17.5]) by nss4.cc.Lehigh.EDU (8.8.8/8.8.5) with ESMTP id SAA36578 for ; Sun, 26 Jul 1998 18:40:09 -0400 Received: from B1ljohn@aol.com by imo15.mx.aol.com (IMOv14_b1.1) id 3BDMa20769; Sun, 26 Jul 1998 18:39:33 -0400 (EDT) Message-Id: <1e0902c1.35bbb026@aol.com> Date: Sun, 26 Jul 1998 18:39:33 EDT Reply-To: B1ljohn@aol.com Sender: owner-qrp-l@Lehigh.EDU Precedence: bulk From: B1ljohn@aol.com To: "Low Power Amateur Radio Discussion" Subject: Re: QRP++ Lithium battery Mime-Version: 1.0 Content-type: text/plain; charset=US-ASCII Content-transfer-encoding: 7bit X-To: W8tj@aol.com, qrp-l@Lehigh.EDU X-Mailer: AOL 3.0 for Windows 95 sub 18 X-Listprocessor-Version: 8.1 beta -- ListProcessor(tm) by CREN Status: RO Tom, I had the same thing happen. The battery was about 4-5 years old. Measured it and it was low. Replaced and all is well! Hope that cures your problem. Bill From owner-qrp-l@Lehigh.EDU Sun Jul 26 23:49:53 1998 Received: from fidoii.CC.lehigh.EDU (fidoii.CC.lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.8.5/8.8.5) with ESMTP id XAA25520 for ; Sun, 26 Jul 1998 23:49:52 -0400 (EDT) Received: from Lehigh.EDU ([127.0.0.1]) by fidoii.cc.Lehigh.EDU with SMTP id <13568-59898>; Sun, 26 Jul 1998 23:49:26 -0400 Received: from nss4.cc.Lehigh.EDU ([128.180.1.13]) by fidoii.cc.Lehigh.EDU with ESMTP id <13212-59898>; Sun, 26 Jul 1998 23:48:26 -0400 Received: from rm-rstar.sfu.ca (root@rm-rstar.sfu.ca [142.58.120.21]) by nss4.cc.Lehigh.EDU (8.8.8/8.8.5) with ESMTP id XAA47648 for ; Sun, 26 Jul 1998 23:48:17 -0400 Received: from fraser.sfu.ca (fraser.sfu.ca [192.168.0.101]) by rm-rstar.sfu.ca (8.8.7/8.8.7/SFU-4.0H) with SMTP id UAA12406 for ; Sun, 26 Jul 1998 20:48:16 -0700 (PDT) Received: by fraser.sfu.ca (950413.SGI.8.6.12/SFU-2.6C) id UAA05627 for qrp-l@lehigh.edu (from paule@sfu.ca); Sun, 26 Jul 1998 20:48:16 -0700 Message-Id: <199807270348.UAA05627@fraser.sfu.ca> Date: Sun, 26 Jul 1998 20:48:16 -0700 (PDT) Reply-To: paule@sfu.ca Sender: owner-qrp-l@Lehigh.EDU Precedence: bulk From: Paul Erickson To: "Low Power Amateur Radio Discussion" Subject: QRP Plus problem MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-To: qrp-l@Lehigh.EDU (qrp) X-Mailer: ELM [version 2.4 PL24] X-Listprocessor-Version: 8.1 beta -- ListProcessor(tm) by CREN Status: RO Hi Everyone, Right now I don't have access to my notes on the qrp plus, but Jim AL7FS was kind enough to let me know that I was chirping in the later part of the "flight". It may have been due to my battery getting low, but I also seem to recall that someone mentioned a chirp problem when the rit was activated. I was running the last couple of hours with the rit on continuously, so that may have been it. Any "plus" experts out there who can help me out??? cheers, Paul VE7CQK/email: paule@fraser.sfu.ca From owner-qrp-l@Lehigh.EDU Mon Jul 27 00:39:19 1998 Received: from fidoii.CC.lehigh.EDU (fidoii.CC.lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.8.5/8.8.5) with ESMTP id AAA26379 for ; Mon, 27 Jul 1998 00:39:18 -0400 (EDT) Received: from Lehigh.EDU ([127.0.0.1]) by fidoii.cc.Lehigh.EDU with SMTP id <13809-30110>; Mon, 27 Jul 1998 00:38:59 -0400 Received: from nss4.cc.Lehigh.EDU ([128.180.1.13]) by fidoii.cc.Lehigh.EDU with ESMTP id <13195-20898>; Mon, 27 Jul 1998 00:37:58 -0400 Received: from smtp03.primenet.com (daemon@smtp03.primenet.com [206.165.6.133]) by nss4.cc.Lehigh.EDU (8.8.8/8.8.5) with ESMTP id AAA56256 for ; Mon, 27 Jul 1998 00:37:53 -0400 Received: (from daemon@localhost) by smtp03.primenet.com (8.8.8/8.8.8) id VAA10358 for ; Sun, 26 Jul 1998 21:37:53 -0700 (MST) Received: from usr07.primenet.com(206.165.6.207) via SMTP by smtp03.primenet.com, id smtpd010317; Sun Jul 26 21:37:51 1998 Received: (from vole@localhost) by usr07.primenet.com (8.8.5/8.8.5) id VAA25011 for qrp-l@Lehigh.EDU; Sun, 26 Jul 1998 21:37:49 -0700 (MST) Message-Id: <199807270437.VAA25011@usr07.primenet.com> Date: Sun, 26 Jul 1998 21:37:49 -0700 (MST) Reply-To: vole@primenet.com Sender: owner-qrp-l@Lehigh.EDU Precedence: bulk From: Joe Gervais To: "Low Power Amateur Radio Discussion" Subject: Re: QRP Plus problem X-Listprocessor-Version: 8.1 beta -- ListProcessor(tm) by CREN Status: RO Howdy again, Paul (VE7CQK) wrote: > > [ ... ] Jim AL7FS was kind enough to let me know that I was chirping > in the later part of the "flight". It may have been due to my battery > getting low, but I also seem to recall that someone mentioned a chirp > problem when the rit was activated. The only times I've ever had chirp reports on my QRP+ was when the battery was low. I used the RIT often and never seemed to have a problem, but that's just my mileage. I'd tend to blame the battery first. The QRP+ is a bit of "juice hog" on recv compared to many other QRP-only rigs. It can wear down a battery fast if you're calling CQ alot. Speaking of, heard you out there Paul, just couldn't catch you! Next time you won't escape so easily. :) Cheers de AB7TT, -Joe, vole@primenet.com, AZ ScQRPions (Phoenix) "If it ain't fun, you ain't doin' it right!" -The AZ ScQRPions From owner-qrp-l@Lehigh.EDU Wed Jul 29 22:14:03 1998 Received: from fidoii.CC.lehigh.EDU (fidoii.CC.lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.8.5/8.8.5) with ESMTP id WAA19601 for ; Wed, 29 Jul 1998 22:14:02 -0400 (EDT) Received: from Lehigh.EDU ([127.0.0.1]) by fidoii.cc.Lehigh.EDU with SMTP id <13658-34260>; Wed, 29 Jul 1998 22:13:27 -0400 Received: from nss4.cc.Lehigh.EDU ([128.180.1.13]) by fidoii.cc.Lehigh.EDU with ESMTP id <13261-34260>; Wed, 29 Jul 1998 22:12:10 -0400 Received: from europe.std.com (europe.std.com [199.172.62.20]) by nss4.cc.Lehigh.EDU (8.8.8/8.8.5) with ESMTP id WAA50782 for ; Wed, 29 Jul 1998 22:12:05 -0400 Received: from world.std.com by europe.std.com (8.7.6/BZS-8-1.0) id WAA19769; Wed, 29 Jul 1998 22:12:05 -0400 (EDT) Received: by world.std.com (TheWorld/Spike-2.0) id AA21490; Wed, 29 Jul 1998 22:12:03 -0400 Message-Id: <199807300212.AA21490@world.std.com> Date: Wed, 29 Jul 1998 22:12:03 -0400 Reply-To: malman@world.std.com Sender: owner-qrp-l@Lehigh.EDU Precedence: bulk From: joel malman To: "Low Power Amateur Radio Discussion" Subject: QRP+ Repairs X-Cc: malman@world.std.com X-Listprocessor-Version: 8.1 beta -- ListProcessor(tm) by CREN Status: RO Folks, Does anyone know if K7SY is still doing QRP+ repairs? Does he have an E-Mail address? My QRP+ is pretty dead. Thanks. /joel wa1qvm (Concord, Mass) From owner-qrp-l@Lehigh.EDU Fri Jul 31 05:43:04 1998 Received: from fidoii.CC.lehigh.EDU (fidoii.CC.lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.8.5/8.8.5) with ESMTP id FAA27102 for ; Fri, 31 Jul 1998 05:43:03 -0400 (EDT) Received: from Lehigh.EDU ([127.0.0.1]) by fidoii.cc.Lehigh.EDU with SMTP id <14224-55890>; Fri, 31 Jul 1998 05:42:33 -0400 Received: from nss4.cc.Lehigh.EDU ([128.180.1.13]) by fidoii.cc.Lehigh.EDU with ESMTP id <12843-19798>; Fri, 31 Jul 1998 05:42:21 -0400 Received: from europe.std.com (europe.std.com [199.172.62.20]) by nss4.cc.Lehigh.EDU (8.8.8/8.8.5) with ESMTP id FAA36366 for ; Fri, 31 Jul 1998 05:42:17 -0400 Received: from world.std.com by europe.std.com (8.7.6/BZS-8-1.0) id FAA06809; Fri, 31 Jul 1998 05:42:18 -0400 (EDT) Received: by world.std.com (TheWorld/Spike-2.0) id AA02601; Fri, 31 Jul 1998 05:42:16 -0400 Message-Id: <199807310942.AA02601@world.std.com> Date: Fri, 31 Jul 1998 05:42:16 -0400 Reply-To: malman@world.std.com Sender: owner-qrp-l@Lehigh.EDU Precedence: bulk From: joel malman To: "Low Power Amateur Radio Discussion" Subject: Thanks for the QRP+ advice X-Cc: malman@world.std.com X-Listprocessor-Version: 8.1 beta -- ListProcessor(tm) by CREN Status: RO Thanks to everyone for the info/advice on repairing my QRP+. Some of the horror stories did not paint a happy picture. I decided to fix the rig myself. The symptoms were: Rig stuck in Transmit mode, and display frozen. I found a tempory fix for the 'stuck in TX mode' by using a mini-mono phone plug in the paddle port (really) -- that stopped the rig from always transmitting. The display and memory were still frozen. I reinitialized the CPU, but the memory and display were now frozen at that factory settings. In the end the fix was to remove the battery and then reinstall (reseat) it. That fixed the memory/display problem and even fixed the 'stuck in TX mode' problem. Bench time: 1.5 hours Cost: $0.00 /joel wa1qvm (Concord, Mass) From owner-qrp-l@Lehigh.EDU Wed Aug 5 13:36:48 1998 Received: from fidoii.CC.lehigh.EDU (fidoii.CC.lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.8.5/8.8.5) with ESMTP id NAA05163 for ; Wed, 5 Aug 1998 13:36:47 -0400 (EDT) Received: from Lehigh.EDU ([127.0.0.1]) by fidoii.cc.Lehigh.EDU with SMTP id <13012-38684>; Wed, 5 Aug 1998 13:36:33 -0400 Received: from nss4.cc.Lehigh.EDU ([128.180.1.13]) by fidoii.cc.Lehigh.EDU with ESMTP id <13013-38684>; Wed, 5 Aug 1998 13:36:03 -0400 Received: from netcom17.netcom.com (dgf@netcom17.netcom.com [192.100.81.130]) by nss4.cc.Lehigh.EDU (8.8.8/8.8.5) with ESMTP id NAA42868 for ; Wed, 5 Aug 1998 13:35:55 -0400 Received: (from dgf@localhost) by netcom17.netcom.com (8.8.5-r-beta/8.8.5/(NETCOM v1.02)) id KAA25386 for qrp-l@lehigh.edu; Wed, 5 Aug 1998 10:35:54 -0700 (PDT) Message-Id: <199808051735.KAA25386@netcom17.netcom.com> Date: Wed, 5 Aug 1998 10:35:54 -0700 (PDT) Reply-To: dgf@netcom.com Sender: owner-qrp-l@Lehigh.EDU Precedence: bulk From: David Feldman To: "Low Power Amateur Radio Discussion" Subject: QRP++ output power reduction X-Listprocessor-Version: 8.1 beta -- ListProcessor(tm) by CREN Status: RO I have a QRP++ that I would like to use as IF for a Ten-Tec 1208 transverter. The problem (?) I have is that my QRP++ puts out almost 8 watts, which I think is much for the 4 watt swamping resistor network in the 1208. Is there a control inside the QRP++ which reduces transmit level for both CW and SSB? 73 Dave WB0GAZ dgf@netcom.com From owner-qrp-l@Lehigh.EDU Sun Sep 6 13:15:33 1998 Received: from fidoii.CC.lehigh.EDU (fidoii.CC.lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.8.5/8.8.5) with ESMTP id NAA02618 for ; Sun, 6 Sep 1998 13:15:32 -0400 (EDT) Received: from Lehigh.EDU ([127.0.0.1]) by fidoii.cc.Lehigh.EDU with SMTP id <12956-39176>; Sun, 6 Sep 1998 13:15:06 -0400 Received: from nss4.cc.Lehigh.EDU ([128.180.1.13]) by fidoii.cc.Lehigh.EDU with ESMTP id <12393-21510>; Sun, 6 Sep 1998 13:12:05 -0400 Received: from wstcm1.westco.net (wstcm1.westco.net [205.245.79.3]) by nss4.cc.Lehigh.EDU (8.8.8/8.8.5) with SMTP id NAA82432 for ; Sun, 6 Sep 1998 13:11:58 -0400 Received: from beaks [205.245.79.202] by wstcm1.westco.net (SMTPD32-4.06) id A0729CD029A; Sun, 06 Sep 1998 13:03:46 EDT Message-Id: <005b01bdd9b9$5f9c5520$ca4ff5cd@beaks> Date: Sun, 6 Sep 1998 13:11:21 -0400 Reply-To: beaks@westco.net Sender: owner-qrp-l@Lehigh.EDU Precedence: bulk From: "Beaks" To: "Low Power Amateur Radio Discussion" Subject: Index ++ on SSB, low audio MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit X-To: "qrp-l" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3155.0 X-MimeOLE: Produced By Microsoft MimeOLE V4.72.3155.0 X-Listprocessor-Version: 8.1 beta -- ListProcessor(tm) by CREN Status: RO Hi gang, Anyone know how to get some more "talk power" out of the Index for SSB? I have the ++ without the gain pot for audio and on SSB I can only get about 1.5 watts out on voice peaks. It will "whistle up" to a full 5 though. I had some info on this at one time but have misplaced it. I have tired several different mics and mic elements and so far the little one from MFJ seems to be the best (the one mentioned in the manual) but even with the processing it seems I should be able to get a little better than the 1-1.5 watts out. Also, the audio seems to be distorted and raspy sounding even with different mics. Its usuable this way but leaves alot to be desired. Anyone out there have any ideas on this one? Thanks! Arch N8EAG From owner-qrp-l@Lehigh.EDU Sun Sep 6 15:46:45 1998 Received: from fidoii.CC.lehigh.EDU (fidoii.CC.lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.8.5/8.8.5) with ESMTP id PAA05449 for ; Sun, 6 Sep 1998 15:46:44 -0400 (EDT) Received: from Lehigh.EDU ([127.0.0.1]) by fidoii.cc.Lehigh.EDU with SMTP id <13157-70410>; Sun, 6 Sep 1998 15:46:23 -0400 Received: from nss4.cc.Lehigh.EDU ([128.180.1.13]) by fidoii.cc.Lehigh.EDU with ESMTP id <12726-70410>; Sun, 6 Sep 1998 15:44:56 -0400 Received: from host.ott.igs.net (host.ott.igs.net [206.248.16.2]) by nss4.cc.Lehigh.EDU (8.8.8/8.8.5) with ESMTP id PAA26706 for ; Sun, 6 Sep 1998 15:44:51 -0400 Received: from unknown (ttyE1c.ott.igs.net [207.210.11.30]) by host.ott.igs.net (8.8.5/8.6.12) with SMTP id PAA02105 for ; Sun, 6 Sep 1998 15:44:49 -0400 (EDT) Message-Id: Date: Sun, 06 Sep 98 14:53:07 PDT Reply-To: earlve3ab@igs.net Sender: owner-qrp-l@Lehigh.EDU Precedence: bulk From: "E. Andrews" To: "Low Power Amateur Radio Discussion" Subject: re: apparent low pwr on ssb normal voice.. MIME-Version: 1.0 Content-Type: text/plain; charset="ISO-8859-1"; X-MAPIextension=".TXT" Content-Transfer-Encoding: 7bit X-MSMail-Priority: Normal X-Priority: 3 X-Listprocessor-Version: 8.1 beta -- ListProcessor(tm) by CREN Status: RO I wouldnt be too concerned about the wattmeter indications or relative power output on ssb..if you whistle the meter goes way up..this is a normal condition i have found and if you find it necessary to get a little bit more ummph..on ssb...perhaps a speech processor.. i think ten tec has an inexpensive one out as a kit..or...construct a small linear amp...very basic 10db amp//at about 10 watts T50-2 and t50-6 coil forms should be adequet...and use a good stiff bias..ie lm317...i have some circuits kicking around from qrp handbooks etc.. 73 earl ve3ab.... From owner-qrp-l@Lehigh.EDU Sun Sep 6 22:48:09 1998 Received: from fidoii.CC.lehigh.EDU (fidoii.CC.lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.8.5/8.8.5) with ESMTP id WAA13040 for ; Sun, 6 Sep 1998 22:48:08 -0400 (EDT) Received: from Lehigh.EDU ([127.0.0.1]) by fidoii.cc.Lehigh.EDU with SMTP id <12672-21510>; Sun, 6 Sep 1998 22:47:33 -0400 Received: from nss4.cc.Lehigh.EDU ([128.180.1.13]) by fidoii.cc.Lehigh.EDU with ESMTP id <12664-39176>; Sun, 6 Sep 1998 22:44:57 -0400 Received: from mail-gw2adm.rcsntx.swbell.net (mail-gw2adm.rcsntx.swbell.net [151.164.60.102]) by nss4.cc.Lehigh.EDU (8.8.8/8.8.5) with ESMTP id WAA11350 for ; Sun, 6 Sep 1998 22:44:34 -0400 Received: from swbell.net (ppp-151-164-38-180.rcsntx.swbell.net [151.164.38.180]) by mail-gw2adm.rcsntx.swbell.net (8.8.5/8.8.5) with ESMTP id VAA12757; Sun, 6 Sep 1998 21:44:27 -0500 (CDT) Message-Id: <35F3488C.980FC0A2@swbell.net> Date: Sun, 06 Sep 1998 21:44:28 -0500 Reply-To: w5yr@swbell.net Sender: owner-qrp-l@Lehigh.EDU Precedence: bulk From: "George T. Baker" To: "Low Power Amateur Radio Discussion" Subject: Re: Index ++ on SSB, low audio References: <005b01bdd9b9$5f9c5520$ca4ff5cd@beaks> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-To: beaks@westco.net X-Cc: Low Power Amateur Radio Discussion X-Mailer: Mozilla 4.02 [en]C-DIAL (Win95; U) X-Listprocessor-Version: 8.1 beta -- ListProcessor(tm) by CREN Status: RO It sounds like your rig is working just like it should, based on the meter readings you quoted. It is very typical for the usual male voice to talkup a SSB transmitter to only about 20% (or less) of its key-down or "whistle" (single tone) output. The ratio of peak to average power in an SSB signal is in the order that you are seeing. Theoretically, it is 14 db for the average male voice at audio baseband and 17db when converted to SSB. In any event your output signal should/must sound clean on a monitor receiver. If it is raspy then you have a problem that will have to be corrected before you can be concerned about meter readings. If you want higher meter readings (higher average power output) AND a clean output signal, then the only creditable way to achieve that is with r-f speech clipping and filtering. The key here is that you want to get the average power increase with minimal distortion. It has been shown over the years that only r-f clipping and filtering will do that. Soft clipping - clled r-f compression in the spec sheets - helps a little, but audio clipping is absolutely out. The inband distortion products it creates actually detract from readability even though the meters read happily higher. Audio processing works with AM, but not with SSB. A lot of work was done in this general area, by myself and others, back in the 70's, especially Collins Radio. It is no coincidence that no Collins SSB radio to my knowledge uses audio speech clipping/filtering. Their amateur SSB products evidently did not offer r-f processing due to the costs. But, several r-f processing add-on i-f units came out in the 70's for Collins S-Line and Drake C-Line transmitters, in addition to the Comdel and Vomax outboard processors. "There ain't no free lunch!" 72/73, George Amateur Radio W5YR, in the 53rd year and it just keeps getting better! AutoPOWER Systems, Fairview, TX (30 mi NE Dallas) 33.2 N 96.6 W EM13RE QRP-L QRP-ARCI FISTS NORCAL ARS 10-X ICQ 16819496 Beaks wrote: > > Hi gang, > Anyone know how to get some more "talk power" out of the Index for SSB? I > have the ++ without the gain pot for audio and on SSB I can only get about > 1.5 watts out on voice peaks. It will "whistle up" to a full 5 though. From owner-qrp-l@Lehigh.EDU Mon Sep 7 15:59:01 1998 Received: from fidoii.CC.lehigh.EDU (fidoii.CC.lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.8.5/8.8.5) with ESMTP id PAA16165 for ; Mon, 7 Sep 1998 15:59:00 -0400 (EDT) Received: from Lehigh.EDU ([127.0.0.1]) by fidoii.cc.Lehigh.EDU with SMTP id <13394-40618>; Mon, 7 Sep 1998 15:58:38 -0400 Received: from nss4.cc.Lehigh.EDU ([128.180.1.13]) by fidoii.cc.Lehigh.EDU with ESMTP id <13353-61102>; Mon, 7 Sep 1998 15:57:12 -0400 Received: from wstcm1.westco.net (wstcm1.westco.net [205.245.79.3]) by nss4.cc.Lehigh.EDU (8.8.8/8.8.5) with SMTP id PAA76088 for ; Mon, 7 Sep 1998 15:57:04 -0400 Received: from beaks [205.245.79.214] by wstcm1.westco.net (SMTPD32-4.06) id A8C7187B0134; Mon, 07 Sep 1998 15:49:27 EDT Message-Id: <004301bdda99$9bd1a0a0$d64ff5cd@beaks> Date: Mon, 7 Sep 1998 15:56:30 -0400 Reply-To: beaks@westco.net Sender: owner-qrp-l@Lehigh.EDU Precedence: bulk From: "Beaks" To: "Low Power Amateur Radio Discussion" Subject: Index low audio, THANKS!! MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit X-To: "qrp-l" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3155.0 X-MimeOLE: Produced By Microsoft MimeOLE V4.72.3155.0 X-Listprocessor-Version: 8.1 beta -- ListProcessor(tm) by CREN Status: RO Thanks to all who took time to drop me a line on the SSB output power on SSB. Seems the general opinion was that the 1-2 watts was normal for this rig on SSB and long as it was making contacts not to worry about the meter readings, I can live with that! Also, the raspy audio seemed to be caused but the closeness of the twin lead feedline coming into the tuner (rf), anyway, after moving things around abit the audio was OK. Thanks again all Arch N8EAG Date: Tue, 22 Sep 1998 14:12:33 -0700 Reply-To: radman@best.com From: "Radman" Save Address Block Sender To: "Low Power Amateur Radio Discussion" Subject: Index Labs support -- QRP + (++) Jim, Dave et al, Regarding Index Labs and support of the QRP+ ... I had a conversation with Bruce Franklin, designer of the Index Labs QRP+ , on April 28th of this year. He asked me to pass along to the folks on QRP-L the following support contact for the Index Labs QRP+/++. (I posted this info as soon as I got it from Bruce.) Please contact: Stan Yarema / K7SY - Seattle, WA. Phone: 206-285-8941, for support/parts, etc. (Sorry, I don't have an email for Stan.) Stan, per Bruce Franklin, has taken over product support of the Index Labs QRP+/++. Index Labs, with Bruce Franklin at the helm, is still going strong -- however, Bruce is on a new mission outside the realm of amateur radio. I hope to have a conversation with him soon and bring you an update of his latest adventures -- he's still wireless ;)! GL & 72 - Conrad Weiss - NN6CW From owner-qrp-l@Lehigh.EDU Fri Sep 25 13:57:40 1998 Received: from fidoii.CC.lehigh.EDU (fidoii.CC.lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.8.5/8.8.5) with ESMTP id NAA12505 for ; Fri, 25 Sep 1998 13:57:36 -0400 (EDT) Received: from Lehigh.EDU ([127.0.0.1]) by fidoii.cc.Lehigh.EDU with SMTP id <13446-30666>; Fri, 25 Sep 1998 13:57:27 -0400 Received: from nss4.cc.Lehigh.EDU ([128.180.1.13]) by fidoii.cc.Lehigh.EDU with ESMTP id <13058-8140>; Fri, 25 Sep 1998 13:56:16 -0400 Received: from mail1.halcyon.com (mail1.halcyon.com [206.63.63.40]) by nss4.cc.Lehigh.EDU (8.9.1a/8.9.1) with ESMTP id NAA39420 for ; Fri, 25 Sep 1998 13:56:03 -0400 Received: from default (blv-ux100-ip41.nwnexus.net [206.63.42.41]) by mail1.halcyon.com (8.8.8/8.8.8) with SMTP id KAA05340 for ; Fri, 25 Sep 1998 10:55:44 -0700 (PDT) Message-Id: <000901bde8ad$e2c528c0$292a3fce@default> Date: Fri, 25 Sep 1998 10:56:56 -0700 Reply-To: knopf@halcyon.com Sender: owner-qrp-l@Lehigh.EDU Precedence: bulk From: "Jim Knopf" To: "Low Power Amateur Radio Discussion" Subject: QRP+ and MFJ-285W speaker mike MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Content-Transfer-Encoding: 7bit X-To: X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook 8.5, Build 4.71.2377.0 X-MimeOLE: Produced By Microsoft MimeOLE V4.72.3155.0 X-Listprocessor-Version: 8.1 beta -- ListProcessor(tm) by CREN Status: RO Got my "new" QRP+ today. Sure is a sweetheart, but I can't seem to use my MFJ-285W speaker mike with it. The QRP+ serial # is 1139. I bought the 285W speaker mike for it because I read here in some old list postings that the 285w was the one to use. Sure hate to have to dig into the little speaker mike cable, but whenever the speaker mike is plugged in, the qrp+ stops being tuneable, and the audio output stops. Any ideas anybody? Please? ..... -Jim, KI7Q mailto:knopf@halcyon.com Visit the "Father of Shareware" at http://www.halcyon.com/knopf/jim From owner-qrp-l@Lehigh.EDU Fri Sep 25 23:13:24 1998 Received: from fidoii.CC.lehigh.EDU (fidoii.CC.lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.8.5/8.8.5) with ESMTP id XAA12055 for ; Fri, 25 Sep 1998 23:13:23 -0400 (EDT) Received: from Lehigh.EDU ([127.0.0.1]) by fidoii.cc.Lehigh.EDU with SMTP id <12686-30666>; Fri, 25 Sep 1998 23:13:04 -0400 Received: from nss4.cc.Lehigh.EDU ([128.180.1.13]) by fidoii.cc.Lehigh.EDU with ESMTP id <12445-26312>; Fri, 25 Sep 1998 23:11:30 -0400 Received: from mail1.halcyon.com (mail1.halcyon.com [206.63.63.40]) by nss4.cc.Lehigh.EDU (8.9.1a/8.9.1) with ESMTP id XAA13498 for ; Fri, 25 Sep 1998 23:11:19 -0400 Received: from default (blv-ux100-ip41.nwnexus.net [206.63.42.41]) by mail1.halcyon.com (8.8.8/8.8.8) with SMTP id UAA03494 for ; Fri, 25 Sep 1998 20:11:17 -0700 (PDT) Message-Id: <001801bde8fb$7e2dad80$292a3fce@default> Date: Fri, 25 Sep 1998 20:12:28 -0700 Reply-To: knopf@halcyon.com Sender: owner-qrp-l@Lehigh.EDU Precedence: bulk From: "Jim Knopf" To: "Low Power Amateur Radio Discussion" Subject: QRP+ and MFJ-285W speaker mike (continued) MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Content-Transfer-Encoding: 7bit X-To: X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook 8.5, Build 4.71.2377.0 X-MimeOLE: Produced By Microsoft MimeOLE V4.72.3155.0 X-Listprocessor-Version: 8.1 beta -- ListProcessor(tm) by CREN Status: RO >Sure hate to have to dig into the little speaker mike cable, but whenever the speaker mike is plugged in, >the qrp+ stops being tuneable, and the audio output stops. Any ideas anybody? Please? Got several replies to this. Some said the combination worked perfectly together. Others said the pinouts on the QRP+ had two different versions. I'm still stopped. To help me further, could I hear from someone who knows how the speaker mike would be modified to match the pinouts on the QRP+ (assuming it had to be modified)? There are 3 wires inside the mike that might be moved: White, which goes to the tip of the plug. Yellow, which goes to the center ring of the plug. and Green, which goes to the top or outer ring of the plug. How would these be changed? ..... -Jim, KI7Q mailto:knopf@halcyon.com Visit the "Father of Shareware" at http://www.halcyon.com/knopf/jim From owner-qrp-l@Lehigh.EDU Sun Oct 11 08:55:22 1998 Received: from fidoii.CC.lehigh.EDU (fidoii.CC.lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.8.5/8.8.5) with ESMTP id IAA07726 for ; Sun, 11 Oct 1998 08:55:21 -0400 (EDT) Received: from Lehigh.EDU ([127.0.0.1]) by fidoii.cc.Lehigh.EDU with SMTP id <13288-54382>; Sun, 11 Oct 1998 08:54:53 -0400 Received: from nss4.cc.Lehigh.EDU ([128.180.1.13]) by fidoii.cc.Lehigh.EDU with ESMTP id <12410-32118>; Sun, 11 Oct 1998 08:53:50 -0400 Received: from x16.boston.juno.com (x16.boston.juno.com [205.231.101.28]) by nss4.cc.Lehigh.EDU (8.9.1a/8.9.1) with ESMTP id IAA51610 for ; Sun, 11 Oct 1998 08:53:48 -0400 Received: (from w2bj@juno.com) by x16.boston.juno.com (queuemail) id DRAGMCGB; Sun, 11 Oct 1998 08:53:16 EDT Message-Id: <19981011.072254.4527.0.w2bj@juno.com> Date: Sun, 11 Oct 1998 08:53:16 EDT Reply-To: w2bj@juno.com Sender: owner-qrp-l@Lehigh.EDU Precedence: bulk From: w2bj@juno.com (Barry J Minsky) To: "Low Power Amateur Radio Discussion" Subject: QRP++ HELP X-Mailer: Juno 1.49 X-Juno-Line-Breaks: 6-7,12-17 X-Listprocessor-Version: 8.1 beta -- ListProcessor(tm) by CREN Status: RO I am having a problem with my QRP++ and would appreciate some advice. The rig is not holding its memories. When I turn it on, a whole new group of frequencies are in the memories, most of which are not in the ham bands. The mode resets to SSB even though I only use it on CW. The SCAF filter goes to 2400 even though I normally set it for 600. If I press the lower left button while turning the rig on, the default factory preset frequencies are in the memories. My first thought was the need for a new battery. I changed the battery which was in fact low. The problem persists. This problem does not seem to affect the operation of the rig. The receiver works well and I am getting out with the normal power. It is just annoying to have to reset everything whenever I use it. Does anyone have any advice for me? 72/73, Barry, W2BJ From owner-qrp-l@Lehigh.EDU Sun Oct 11 10:49:25 1998 Received: from fidoii.CC.lehigh.EDU (fidoii.CC.lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.8.5/8.8.5) with ESMTP id KAA09588 for ; Sun, 11 Oct 1998 10:49:24 -0400 (EDT) Received: from Lehigh.EDU ([127.0.0.1]) by fidoii.cc.Lehigh.EDU with SMTP id <13354-32118>; Sun, 11 Oct 1998 10:49:13 -0400 Received: from nss4.cc.Lehigh.EDU ([128.180.1.13]) by fidoii.cc.Lehigh.EDU with ESMTP id <12596-37744>; Sun, 11 Oct 1998 10:48:08 -0400 Received: from mail.alltel.net (mail.alltel.net [166.102.165.30]) by nss4.cc.Lehigh.EDU (8.9.1a/8.9.1) with ESMTP id KAA42262 for ; Sun, 11 Oct 1998 10:47:58 -0400 Received: from alltel.net (fsar2pp14.alltel.net [166.102.155.15]) by mail.alltel.net (8.9.1/ALLTEL Messaging Service) with ESMTP id JAA12655; Sun, 11 Oct 1998 09:48:03 -0500 (CDT) Message-Id: <3620C51A.DB52C988@alltel.net> Date: Sun, 11 Oct 1998 09:47:54 -0500 Reply-To: w5jay@alltel.net Sender: owner-qrp-l@Lehigh.EDU Precedence: bulk From: Jay Bromley To: "Low Power Amateur Radio Discussion" Subject: Re: QRP++ HELP References: <19981011.072254.4527.0.w2bj@juno.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Content-Transfer-Encoding: 7bit X-To: w2bj@juno.com, Low Power Amateur Radio Discussion X-Mailer: Mozilla 4.04 [en] (Win95; U) X-Listprocessor-Version: 8.1 beta -- ListProcessor(tm) by CREN Status: RO Hi Barry, Did you reset the microprocessor after battery replacement? If you haven't I would give it a try. 73 de w5jay or just Jay Jay Bromley Fort Smith, AR From owner-qrp-l@Lehigh.EDU Sun Oct 11 12:52:58 1998 Received: from fidoii.CC.lehigh.EDU (fidoii.CC.lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.8.5/8.8.5) with ESMTP id MAA11859 for ; Sun, 11 Oct 1998 12:52:57 -0400 (EDT) Received: from Lehigh.EDU ([127.0.0.1]) by fidoii.cc.Lehigh.EDU with SMTP id <13427-54382>; Sun, 11 Oct 1998 12:52:40 -0400 Received: from nss4.cc.Lehigh.EDU ([128.180.1.13]) by fidoii.cc.Lehigh.EDU with ESMTP id <12499-23924>; Sun, 11 Oct 1998 12:51:28 -0400 Received: from mtiwmhc01.worldnet.att.net (mtiwmhc01.worldnet.att.net [204.127.131.36]) by nss4.cc.Lehigh.EDU (8.9.1a/8.9.1) with ESMTP id MAA47252 for ; Sun, 11 Oct 1998 12:51:21 -0400 Received: from n4xy ([12.69.100.192]) by mtiwmhc01.worldnet.att.net (InterMail v03.02.03 118 118 102) with SMTP id <19981011165049.KZKF9650@n4xy>; Sun, 11 Oct 1998 16:50:49 +0000 Message-Id: <3.0.5.32.19981011125042.00bcaa00@postoffice.worldnet.att.net> Date: Sun, 11 Oct 1998 12:50:42 -0400 Reply-To: n4xy@att.net Sender: owner-qrp-l@Lehigh.EDU Precedence: bulk From: Ed Tanton To: "Low Power Amateur Radio Discussion" Subject: Re: QRP++ HELP In-Reply-To: <19981011.072254.4527.0.w2bj@juno.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" X-To: w2bj@juno.com X-Cc: "Low Power Amateur Radio Discussion" X-Sender: n4xy@postoffice.worldnet.att.net X-Mailer: QUALCOMM Windows Eudora Pro Version 3.0.5 (32) X-Listprocessor-Version: 8.1 beta -- ListProcessor(tm) by CREN Status: RO Hi Barry... I work with PCs... I HAVE had a bad, NEW, battery (for the CMOS) show up every once in a while over the years. Even checking the voltage isn't really enough with some batteries-note the way Duracell tests them under load in that builtin tester. It isn't a common occurance-but it would be the first thing I would redo, before looking more deeply. And then there's whether it's in correctly. Some/most such batteries appear to be diode-isolated... so reverse voltage from the battery won't affect anything (and any voltages higher than the battery's won't go INTO the battery, avoiding a nasty little bang in the case of Lithium cells.) My first step after this doesn't help would be to check that isolation diode. Then there is probably a very-high-value "super-cap" somewhere that may have shorted... they stuff a lot of foil and goop into quite a small package for the usual values ranging from 1/2 to 1 farad at 5VDC. Finally, there is the CMOS memory itself. It is much more likely to be something else (like a leaky capacitor) but if the chips are socketed, you can simply pull them and see if the voltage hangs in there. I would put a high-input-impedance DVM on the CMOS voltage bus and (with the chips and a new battery in place) turn off the power supply, and watch it drain-noting the rate. Then, remove the CMOS (with power OFF!) Turn it back on, note the new voltage, and, again, turn it off watching the drop rate. If it stays the same as it was WITH the memory IC(s?) removed, it's not the chip(s). You can follow the same procedure for that super-cap, and other components right there around the memory and battery circuit. Let me know how it goes, please. Good Luck. 73 __________________________________________________________ Ed Tanton N4XY EMAIL: n4xy@att.net 189 Pioneer Trail Marietta, GA 30068-3466 TEL: (770)579-3933 V/MBX/FAX __________________________________________________________ INTERESTS: QRP BoatAnchors Test Equipment Photography CW: 99.9% Mercury Paddle # 0214 QRP to 150W: 95% ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ "Think you can, think you can't: either way you're right!" Henry Ford ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ From owner-qrp-l@Lehigh.EDU Fri May 21 06:23:15 1999 Received: from fidoii.CC.lehigh.EDU (fidoii.CC.lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.8.5/8.8.5) with ESMTP id GAA08466 for ; Fri, 21 May 1999 06:23:14 -0400 (EDT) Received: from localhost ([127.0.0.1]:2399 "HELO Lehigh.EDU" ident: "IDENT-NOT-QUERIED") by fidoii.cc.Lehigh.EDU with SMTP id <53562-59272>; Fri, 21 May 1999 06:22:03 -0400 Received: from nss4.CC.Lehigh.EDU ([128.180.1.13]:1992 "EHLO nss4.cc.Lehigh.EDU" ident: "IDENT-NOT-QUERIED") by fidoii.cc.Lehigh.EDU with ESMTP id <53419-48774>; Fri, 21 May 1999 06:20:54 -0400 Received: from smtp1.erols.com (smtp1.erols.com [207.172.3.234]) by nss4.cc.Lehigh.EDU (8.9.1a/8.9.1) with ESMTP id GAA141870 for ; Fri, 21 May 1999 06:20:53 -0400 Received: from default (207-172-111-52.s52.tnt1.ann.va.dialup.rcn.com [207.172.111.52]) by smtp1.erols.com (8.8.8/8.8.5) with SMTP id GAA10623 for ; Fri, 21 May 1999 06:20:52 -0400 (EDT) Message-Id: <37434DA6.854@erols.com> Date: Wed, 19 May 1999 19:47:50 -0400 Reply-To: k3chp@erols.com Sender: owner-qrp-l@Lehigh.EDU Precedence: bulk From: Joseph Mikuckis To: "Low Power Amateur Radio Discussion" Subject: QRP+ Dial Creep MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Content-Transfer-Encoding: 7bit X-Mailer: Mozilla 3.01C-KC032698 (Win95; I) X-Orcpt: rfc822;qrp-l@fidoii.CC.Lehigh.EDU X-Listprocessor-Version: 8.1 beta -- ListProcessor(tm) by CREN Status: RO Perhaps some of you remember the cover picture of July 96 QRP ARCI Quarterly showing QRP+ with a very large dial knob. What I did to eliminate dial creep was to drill a large hole on the back of the knob opposite (180 degrees) the handle and fill it with lead until a perfect balance was reached. After that I do not experience any more dial creep. The main reason for replacing the knob was that the original looked (and felt) too cheap for the unit. 73 de Joe, K3CHP Riverdale, MD From owner-qrp-l@Lehigh.EDU Thu Jun 10 10:43:25 1999 Received: from fidoii.CC.lehigh.EDU (fidoii.CC.lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.8.5/8.8.5) with ESMTP id KAA00607 for ; Thu, 10 Jun 1999 10:43:24 -0400 (EDT) Received: from localhost ([127.0.0.1]:2156 "HELO Lehigh.EDU" ident: "IDENT-NOT-QUERIED") by fidoii.cc.Lehigh.EDU with SMTP id <53998-54012>; Thu, 10 Jun 1999 10:40:13 -0400 Received: from nss4.CC.Lehigh.EDU ([128.180.39.1]:58341 "EHLO nss4.cc.lehigh.edu" ident: "IDENT-NOT-QUERIED") by fidoii.cc.Lehigh.EDU with ESMTP id <53643-40698>; Thu, 10 Jun 1999 10:37:48 -0400 Received: from phy6.inel.gov (phy6.INEL.GOV [134.20.176.30]) by nss4.cc.lehigh.edu (8.9.1a/8.9.1) with SMTP id KAA72258 for ; Thu, 10 Jun 1999 10:37:40 -0400 Received: from pc-lve1 by axp1.inel.gov with SMTP; Thu, 10 Jun 1999 8:36:59 -0600 Message-Id: <3.0.3.32.19990610083604.00959a10@axp1> Date: Thu, 10 Jun 1999 08:36:04 -0600 Reply-To: w1hue@amsat.org Sender: owner-qrp-l@Lehigh.EDU Precedence: bulk From: Larry East To: "Low Power Amateur Radio Discussion" Subject: RE: SG2020 Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" X-To: qrp-l@lehigh.edu X-Cc: aweiss@usd.edu X-Sender: lve@axp1 (Unverified) X-Mailer: QUALCOMM Windows Eudora Pro Version 3.0.3 (32) X-Orcpt: rfc822;qrp-l@fidoii.CC.lehigh.EDU X-Listprocessor-Version: 8.1 beta -- ListProcessor(tm) by CREN Status: RO Excerpt from a recent post from Ade Weiss: > >As for the QRP+, it should never have seen the light of day. The fatal >combination of IF gain, AGC loop, and inability of the DSP filter to actually >reject off-center freq signals makes it useless in a contest situation. One >needs a really clear freq +/-4kHz to escape the AGC action caused by >strong stations. > I assume that you are referring to the "New Improved" QRP+. About 97% of the problem that you refer to is caused by a limiter in the IF (and hence before the SCAF). Removing the IF limiter and installing a limiter after the SCAF (to reduce AGC "pumping") results in a very usable CW rig -- I've even used mine a couple of times in 160M contests(!). Early production runs of the "New Improved" version also fed to high a signal level to the SCAF ... Index fixed that in later runs and published a mod to cure the problem (a simple resistor change). Apparently the SG2020 uses the same IF limiter scheme ... some folks are slow learners! :-) 72, Larry W1HUE/7 From owner-qrp-l@Lehigh.EDU Thu Jun 10 23:49:42 1999 Received: from fidoii.CC.lehigh.EDU (fidoii.CC.lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.8.5/8.8.5) with ESMTP id XAA05195 for ; Thu, 10 Jun 1999 23:49:41 -0400 (EDT) Received: from localhost ([127.0.0.1]:4318 "HELO Lehigh.EDU" ident: "IDENT-NOT-QUERIED") by fidoii.cc.Lehigh.EDU with SMTP id <54514-56310>; Thu, 10 Jun 1999 23:49:04 -0400 Received: from nss4.CC.Lehigh.EDU ([128.180.39.1]:56019 "EHLO nss4.cc.lehigh.edu" ident: "IDENT-NOT-QUERIED") by fidoii.cc.Lehigh.EDU with ESMTP id <53559-54012>; Thu, 10 Jun 1999 23:47:53 -0400 Received: from sparticus.bright.net (sparticus.bright.net [205.212.123.5]) by nss4.cc.lehigh.edu (8.9.1a/8.9.1) with ESMTP id XAA41040 for ; Thu, 10 Jun 1999 23:47:51 -0400 Received: from garynye (basc1-cs-2.dial.bright.net [209.143.30.3]) by sparticus.bright.net (8.9.3/8.9.3 ComNet Build) with SMTP id XAA20104 for ; Thu, 10 Jun 1999 23:47:50 -0400 (EDT) Message-Id: <199906110347.XAA20104@sparticus.bright.net> Date: Thu, 10 Jun 1999 23:48:04 -0400 Reply-To: gcnye@bright.net Sender: owner-qrp-l@Lehigh.EDU Precedence: bulk From: "Gary Nye" To: "Low Power Amateur Radio Discussion" Subject: W1HUE QRP+ mods! In-Reply-To: <3.0.3.32.19990610083604.00959a10@axp1> MIME-Version: 1.0 Content-type: text/plain; charset=US-ASCII Content-transfer-encoding: 7BIT Content-Transfer-Encoding: 7BIT X-To: qrp-l@LEHIGH.edu X-mailer: Pegasus Mail for Win32 (v3.01d) X-Orcpt: rfc822;qrp-l@fidoii.CC.lehigh.EDU X-Listprocessor-Version: 8.1 beta -- ListProcessor(tm) by CREN Status: RO Could not resist adding my .02 worth. to Larry's comments. > I assume that you are referring to the "New Improved" QRP+. About 97% of > the problem that you refer to is caused by a limiter in the IF (and hence > before the SCAF). Removing the IF limiter and installing a limiter after > the SCAF (to reduce AGC "pumping") results in a very usable CW rig -- I've > even used mine a couple of times in 160M contests(!). Early production runs > of the "New Improved" version also fed to high a signal level to the SCAF > I have done Larry's rcvr mods on my updated QRP+ and am very happy with the results. The updated rig was unusable at my location in Ohio, with my antenna, a horizontal 80m loop. After doing the limiter and SCAF mods its like a new radio. I used it all winter long for fox hunts etc. Without those mods, the radio was unusable if an S9 sig was within 3khz of the desired sig. Anyone who has not already done the rcvr mods is missing out. The limiter mod is probably the most important for the newer rigs and is really very simple to do. Still waiting (patiently) on a K2, Gary ps - I remember when I ordered the QRP+, I waited for three months without hearing anything from Index Labs. > Apparently the SG2020 uses the same IF limiter scheme ... some folks are > slow learners! :-) > > 72, Larry W1HUE/7 > ================================================ Gary Nye WD8KQY gcnye@bright.net Tiffin, OH QRP-ARCI #5705 QRP-L #446 NORCAL #2330 ARS #204 ================================================