From owner-qrp-l@Lehigh.EDU Mon Apr 26 09:30:28 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 JAA07105 for ; Mon, 26 Apr 1999 09:30:27 -0400 (EDT) Received: from localhost ([127.0.0.1]:2243 "HELO Lehigh.EDU" ident: "IDENT-NOT-QUERIED") by fidoii.cc.Lehigh.EDU with SMTP id <54256-57284>; Mon, 26 Apr 1999 09:26:35 -0400 Received: from nss4.CC.Lehigh.EDU ([128.180.1.13]:2079 "EHLO nss4.cc.Lehigh.EDU" ident: "IDENT-NOT-QUERIED") by fidoii.cc.Lehigh.EDU with ESMTP id <53439-28616>; Mon, 26 Apr 1999 09:25:10 -0400 Received: from mailhost.cas.utk.edu (MAILHOST.CAS.UTK.EDU [128.169.76.44]) by nss4.cc.Lehigh.EDU (8.9.1a/8.9.1) with ESMTP id JAA48450 for ; Mon, 26 Apr 1999 09:25:08 -0400 Received: from moe.cas.utk.edu (MOE.CAS.UTK.EDU [128.169.76.68]) by mailhost.cas.utk.edu (8.9.2/8.9.0) with ESMTP id JAA12905; Mon, 26 Apr 1999 09:24:47 -0400 (EDT) Message-Id: Date: Mon, 26 Apr 1999 09:24:47 -0400 (EDT) Reply-To: cebik@utkux.utcc.utk.edu Sender: owner-qrp-l@Lehigh.EDU Precedence: bulk From: "L. B. Cebik" To: "Low Power Amateur Radio Discussion" Subject: Re: Antenna suggestions for field QRP In-Reply-To: <19990426125214.AAA8557@office4.office.new> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII X-To: Ed Lawson X-Cc: Low Power Amateur Radio Discussion X-Sender: cebik@moe.cas.utk.edu X-Orcpt: rfc822;qrp-l@fidoii.CC.Lehigh.EDU X-Listprocessor-Version: 8.1 beta -- ListProcessor(tm) by CREN Status: RO Ed, For field use of balanced feeder line, you can always have several lengths with in-line connectors. Then, just use as many sections as the field situation requires to get the line between the rig and the antenna. Almost any small, flat 2 wire connector will do, since the impedance bumps created by them will be insignificant. So, the lighter and small the connectors--without getting into micro connectors--the less extra weight in the backpack. -73- LB, W4RNL From owner-qrp-l@Lehigh.EDU Mon Apr 26 09:52:58 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 JAA08283 for ; Mon, 26 Apr 1999 09:52:55 -0400 (EDT) Received: from localhost ([127.0.0.1]:1412 "HELO Lehigh.EDU" ident: "IDENT-NOT-QUERIED") by fidoii.cc.Lehigh.EDU with SMTP id <53730-28616>; Mon, 26 Apr 1999 09:46:25 -0400 Received: from nss4.CC.Lehigh.EDU ([128.180.1.13]:3390 "EHLO nss4.cc.Lehigh.EDU" ident: "IDENT-NOT-QUERIED") by fidoii.cc.Lehigh.EDU with ESMTP id <53371-37574>; Mon, 26 Apr 1999 09:43:00 -0400 Received: from postoffice.mcg.net (h.206.147.121.2.mcg.net [206.147.121.2] (may be forged)) by nss4.cc.Lehigh.EDU (8.9.1a/8.9.1) with ESMTP id JAA18526 for ; Mon, 26 Apr 1999 09:42:59 -0400 Received: from groucho (i115.cc202.mcg.net [206.10.202.115]) by postoffice.mcg.net (Post.Office MTA v3.5.3 release 223 ID# 0-56468U2500L250S0V35) with SMTP id net; Mon, 26 Apr 1999 08:45:31 -0500 Message-Id: <010b01be8fea$b0855580$a10a5e2c@groucho> Date: Mon, 26 Apr 1999 08:41:16 -0500 Reply-To: applitech@mcg.net Sender: owner-qrp-l@Lehigh.EDU Precedence: bulk From: applitech@mcg.net (Claton Cadmus) To: "Low Power Amateur Radio Discussion" Subject: Re: Antenna suggestions for field QRP References: <19990426125214.AAA8557@office4.office.new> X-To: , "Low Power Amateur Radio Discussion" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.00.2014.211 X-MimeOLE: Produced By Microsoft MimeOLE V5.00.2014.211 X-Orcpt: rfc822;qrp-l@fidoii.CC.Lehigh.EDU X-Listprocessor-Version: 8.1 beta -- ListProcessor(tm) by CREN Status: RO Ed Lawson wrote: > A 66 ft. dipole fed with 300 ohm twinlead would make a very small > package for hiking in. It should work on all bands abover 40M with a tuner. > Has anyone used this type of antenna and was the performance > consitent and good? I have used this at the home QTH except my current antenna is 100 ft. If you're going to use a tuner there is nothing magic about having the dipole 1/2 wave, if fact it can make it touchy to tune on even harmonic bands such as 20 meters. >How do you deal with the excess twinlead if you cannot get the antenna > high enough? Radio Shack sells 300 ohm twinlead inline connector pairs for $1.99 (RS 15-1198). If you use three of these in say 50 ft of feedline making 5, 10 and 20 foot sections with 15 feet connected to the antenna, you will be able to vary the lenght from 15 to 50 feet in 5 foot intervals. (Wire nuts would work too!) Hope this Helps, ---- 73 de KA0GKC Claton Cadmus cla@mcg.net MNQRP #1 Minnesota QRP'ers we're looking for you! Email me or visit this page http://www.qsl.net/mnqrp From owner-qrp-l@Lehigh.EDU Mon Apr 26 14:13:54 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 OAA29432 for ; Mon, 26 Apr 1999 14:13:53 -0400 (EDT) Received: from localhost ([127.0.0.1]:1585 "HELO Lehigh.EDU" ident: "IDENT-NOT-QUERIED") by fidoii.cc.Lehigh.EDU with SMTP id <53664-52682>; Mon, 26 Apr 1999 14:08:35 -0400 Received: from nss4.CC.Lehigh.EDU ([128.180.1.13]:4544 "EHLO nss4.cc.Lehigh.EDU" ident: "IDENT-NOT-QUERIED") by fidoii.cc.Lehigh.EDU with ESMTP id <54161-28616>; Mon, 26 Apr 1999 13:46:35 -0400 Received: from mail.tcjc.cc.tx.us (mail.tccd.net [204.65.240.8]) by nss4.cc.Lehigh.EDU (8.9.1a/8.9.1) with ESMTP id NAA127156 for ; Mon, 26 Apr 1999 13:46:33 -0400 Received: from [10.4.13.122] (tccd243-247.tccd.net [204.65.243.247]) by mail.tcjc.cc.tx.us (8.8.8/8.8.8) with ESMTP id MAA25414; Mon, 26 Apr 1999 12:46:17 -0500 Message-Id: Date: Mon, 26 Apr 1999 12:42:50 -0500 Reply-To: w5tb@SoftHome.net Sender: owner-qrp-l@Lehigh.EDU Precedence: bulk From: W5TB To: "Low Power Amateur Radio Discussion" Subject: Re: Antenna suggestions for field QRP In-Reply-To: <19990426125214.AAA8557@office4.office.new> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" X-To: elawson@lr.net, "Low Power Amateur Radio Discussion" X-Sender: w5tb@pop.SoftHome.net X-Orcpt: rfc822;qrp-l@fidoii.CC.Lehigh.EDU X-Listprocessor-Version: 8.1 beta -- ListProcessor(tm) by CREN Status: RO At 8:59 AM -0400 4/26/99, Ed Lawson wrote: >A 66 ft. dipole fed with 300 ohm twinlead would make a very small >package for hiking in. It should work on all bands abover 40M with a tuner. >Has anyone used this type of antenna and was the performance >consitent and good? How do you deal with the excess twinlead if you canot >get the antenna >high enough? Hi Ed, my eperiements with this have been very successful with better results in some cases - notably in Red River NM where the soil seems very lossy) than I get with the random wire and countepoise. I get the dipole as high as I can and run it as an inverted vee -- a slingshot helps here :-) -- any 'excess' twinlead I simply pull to one side with a piece of twine ( < ) rather than loop. Radio Shack has a very light 300 ohm twinlead in 40' packages, it's marketed as 'indoor' twinlead -- works great at qrp levels and keeps the weight down for portable work. Use different wire colors for each dipole leg to allow quick untangling (unless you're better than me and this is never a problem :-) 73 T.E. 'Doc' Drake W5TB Arlington, TX w5tb@softhome.net http://www.qsl.net/w5tb/ QRPARCI # 3252 NORCAL #1002 QRP-L #673 FISTS # 5365 ARRL Life Member From owner-qrp-l@Lehigh.EDU Mon Apr 26 15:44:57 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 PAA08105 for ; Mon, 26 Apr 1999 15:44:56 -0400 (EDT) Received: from localhost ([127.0.0.1]:4637 "HELO Lehigh.EDU" ident: "IDENT-NOT-QUERIED") by fidoii.cc.Lehigh.EDU with SMTP id <54322-37574>; Mon, 26 Apr 1999 15:42:40 -0400 Received: from nss4.CC.Lehigh.EDU ([128.180.1.13]:1708 "EHLO nss4.cc.Lehigh.EDU" ident: "IDENT-NOT-QUERIED") by fidoii.cc.Lehigh.EDU with ESMTP id <54254-52682>; Mon, 26 Apr 1999 15:41:03 -0400 Received: from imo15.mx.aol.com (imo15.mx.aol.com [198.81.17.5]) by nss4.cc.Lehigh.EDU (8.9.1a/8.9.1) with ESMTP id PAA170308 for ; Mon, 26 Apr 1999 15:41:02 -0400 Received: from FrConrad@aol.com (14450) by imo15.mx.aol.com (IMOv20) id aJWIa20896; Mon, 26 Apr 1999 15:36:56 -0400 (EDT) Message-Id: <6976c8ad.24561a4d@aol.com> Date: Mon, 26 Apr 1999 15:36:45 EDT Reply-To: FrConrad@aol.com Sender: owner-qrp-l@Lehigh.EDU Precedence: bulk From: FrConrad@aol.com To: "Low Power Amateur Radio Discussion" Subject: Re: Antenna suggestions for field QRP MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Content-Transfer-Encoding: 7bit X-To: w5tb@softhome.net, qrp-l@lehigh.edu X-Mailer: AOL 4.0 for Windows 95 sub 13 X-Orcpt: rfc822;qrp-l@fidoii.CC.Lehigh.EDU X-Listprocessor-Version: 8.1 beta -- ListProcessor(tm) by CREN Status: RO In a message dated 4/26/99 11:11:17 AM Pacific Daylight Time, w5tb@SoftHome.net writes: << How do you deal with the excess twinlead if you canot >get the antenna >high enough? Well, I clip it off with a pair of diagonal cutters at exactly the right length. When I get back home I splice/solder the full length back together again and seal it with a little electrical tape. Near zero loss this way (as opposed to the Rat Shack connectors), and after a few splices, I splurge and buy another $1.99 length. John+ WB6MFS From owner-qrp-l@Lehigh.EDU Mon Apr 26 16:17:45 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 QAA11797 for ; Mon, 26 Apr 1999 16:17:44 -0400 (EDT) Received: from localhost ([127.0.0.1]:4444 "HELO Lehigh.EDU" ident: "IDENT-NOT-QUERIED") by fidoii.cc.Lehigh.EDU with SMTP id <54356-28616>; Mon, 26 Apr 1999 16:11:12 -0400 Received: from nss4.CC.Lehigh.EDU ([128.180.1.13]:1242 "EHLO nss4.cc.Lehigh.EDU" ident: "IDENT-NOT-QUERIED") by fidoii.cc.Lehigh.EDU with ESMTP id <54320-28616>; Mon, 26 Apr 1999 16:07:04 -0400 Received: from fh106.infi.net (fh106.infi.net [209.97.16.33]) by nss4.cc.Lehigh.EDU (8.9.1a/8.9.1) with ESMTP id QAA224098 for ; Mon, 26 Apr 1999 16:07:02 -0400 Received: from nr.infi.net (pm6-92.gso.infi.net [208.142.86.92]) by fh106.infi.net (8.8.8/8.8.8) with ESMTP id QAA21061; Mon, 26 Apr 1999 16:06:23 -0400 (EDT) Message-Id: <3724EE94.89185E63@nr.infi.net> Date: Mon, 26 Apr 1999 15:54:12 -0700 Reply-To: ae4ic@nr.infi.net Sender: owner-qrp-l@Lehigh.EDU Precedence: bulk From: Bob Kellogg To: "Low Power Amateur Radio Discussion" Subject: Re: Antenna suggestions for field QRP References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Content-Transfer-Encoding: 7bit X-To: cebik@utkux.utcc.utk.edu X-Cc: Low Power Amateur Radio Discussion X-Mailer: Mozilla 4.04 [en] (Win95; U) X-Orcpt: rfc822;qrp-l@fidoii.CC.Lehigh.EDU X-Listprocessor-Version: 8.1 beta -- ListProcessor(tm) by CREN Status: RO Guys, I've found double banana plug/jacks at hamfests that are very good for this application. They are the correct width for 450 ohm line, and they can be chained together. This plug also allows the use of a plug-in matching stub to eliminate the tuner, or at least bring an unresonant antenna into easy matching range. The stub can be either coax or ladder line. L. B. Cebik wrote: > For field use of balanced feeder line, you can always have several lengths > with in-line connectors. Then, just use as many sections as the field > situation requires to get the line between the rig and the antenna. > Almost any small, flat 2 wire connector will do, since the impedance > bumps created by them will be insignificant. So, the lighter and small > the connectors--without getting into micro connectors--the less extra > weight in the backpack. CUL, Bob Kellogg, AE4IC, Greensboro, NC Prolably, not Nececelery, - Benny Hill From owner-qrp-l@Lehigh.EDU Mon Apr 26 16:42:50 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 QAA14453 for ; Mon, 26 Apr 1999 16:42:47 -0400 (EDT) Received: from localhost ([127.0.0.1]:4683 "HELO Lehigh.EDU" ident: "IDENT-NOT-QUERIED") by fidoii.cc.Lehigh.EDU with SMTP id <54379-57284>; Mon, 26 Apr 1999 16:40:23 -0400 Received: from nss4.CC.Lehigh.EDU ([128.180.1.13]:3859 "EHLO nss4.cc.Lehigh.EDU" ident: "IDENT-NOT-QUERIED") by fidoii.cc.Lehigh.EDU with ESMTP id <54367-57284>; Mon, 26 Apr 1999 16:38:54 -0400 Received: from animal.blarg.net (root@animal.blarg.net [206.124.128.1]) by nss4.cc.Lehigh.EDU (8.9.1a/8.9.1) with ESMTP id QAA63864 for ; Mon, 26 Apr 1999 16:38:50 -0400 Received: from blarg.net (c01-camilla.blarg.net [206.124.131.130]) by animal.blarg.net (8.9.1/8.9.1) with ESMTP id NAA29987 for ; Mon, 26 Apr 1999 13:38:45 -0700 Message-Id: <3727727A.E8744C1E@blarg.net> Date: Wed, 28 Apr 1999 13:41:31 -0700 Reply-To: w7ls@blarg.net Sender: owner-qrp-l@Lehigh.EDU Precedence: bulk From: Jim To: "Low Power Amateur Radio Discussion" Subject: Field dipole insulator/lead-in $6! 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: Mozilla 4.5 [en] (Win98; I) X-Accept-Language: en X-Orcpt: rfc822;qrp-l@fidoii.CC.Lehigh.EDU X-Listprocessor-Version: 8.1 beta -- ListProcessor(tm) by CREN Status: RO Hi, gang. I bought some center insulators with feed-line from Fair Radio a while back and am very pleased with it. I don't know the part number, but here is the description: It is a brand new, unissued US Army field dipole center insulator, in the form of an 'H'. It comes with 25 feet of really tiny balanced feedline, which their catalog calls '25" of wire", because they probably don't recognize it for what it really is. The balanced line has terminals on the far end to hook onto the radio. It was part of a PRC-74 field radio (hf, 2-18 MHz) from the 1960's (Viet Nam, Army Special Forces). The feedline wraps around the 'H' insulator. The wires loop over the top of the 'H' and go to screw terminals on the insulator. Have to look at the picture on the catalog to see it. They are brand new and go for $6 apiece. Very nice unit. Can be fixed in the field with a Leatherman, if necessary. I have no connection to Fair Radio, except as a happy customer. Just add wire and you have a dipole. Works just great and can't be broken. Jim W7LS From owner-qrp-l@Lehigh.EDU Mon Apr 26 23:08:06 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 XAA06020 for ; Mon, 26 Apr 1999 23:08:04 -0400 (EDT) Received: from localhost ([127.0.0.1]:2615 "HELO Lehigh.EDU" ident: "IDENT-NOT-QUERIED") by fidoii.cc.Lehigh.EDU with SMTP id <54473-28616>; Mon, 26 Apr 1999 23:04:06 -0400 Received: from nss4.CC.Lehigh.EDU ([128.180.1.13]:2464 "EHLO nss4.cc.Lehigh.EDU" ident: "IDENT-NOT-QUERIED") by fidoii.cc.Lehigh.EDU with ESMTP id <54462-28616>; Mon, 26 Apr 1999 23:03:28 -0400 Received: from ns1.seidata.com (ns1.seidata.com [208.10.211.2]) by nss4.cc.Lehigh.EDU (8.9.1a/8.9.1) with ESMTP id XAA08412 for ; Mon, 26 Apr 1999 23:03:23 -0400 Received: from seidata.com (cvx2-76.dialup.seidata.com [205.243.226.76] (may be forged)) by ns1.seidata.com (8.8.8/8.8.5) with ESMTP id XAA22845; Mon, 26 Apr 1999 23:03:16 -0400 (EDT) Message-Id: <3725294D.430E5D88@seidata.com> Date: Mon, 26 Apr 1999 22:04:45 -0500 Reply-To: crrandal@seidata.com Sender: owner-qrp-l@Lehigh.EDU Precedence: bulk From: Randy and Cara Randall To: "Low Power Amateur Radio Discussion" Subject: Re: Field dipole insulator/lead-in $6! References: <3727727A.E8744C1E@blarg.net> MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7BIT Content-Transfer-Encoding: 8bit X-To: w7ls@blarg.net X-Cc: Low Power Amateur Radio Discussion X-Mailer: Mozilla 4.51 [en] (Win98; I) X-Accept-Language: en X-Orcpt: rfc822;qrp-l@fidoii.CC.Lehigh.EDU X-Listprocessor-Version: 8.1 beta -- ListProcessor(tm) by CREN Status: RO Jim wrote: > Hi, gang. I bought some center insulators with feed-line from Fair Radio > a while back and am very pleased with it. I don't know the part number, > Here it is! DIPOLE FIXTURE part of PRC-74 long-wire antenna set. H-shaped has 25 vinyl-covered 2-conductor copper wire: 2.5x12x1, 3# #DP-MK-911, UNUSED, $6.00 -- "...but tomorrow may rain so, I'll follow the sun!" Stitchcraft...crafty ideas become creative products!