From owner-qrp-l@Lehigh.EDU Sun Oct 6 13:28:20 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 NAA06575 for ; Sun, 6 Oct 1996 13:28:19 -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 NAA06575 for ; Sun, 6 Oct 1996 13:28:19 -0400 (EDT) Received: from Lehigh.EDU ([127.0.0.1]) by fidoii.cc.lehigh.edu with SMTP id <35186-42363>; Sun, 6 Oct 1996 13:27:53 -0400 Received: from nss2.CC.Lehigh.EDU ([128.180.1.26]) by fidoii.cc.lehigh.edu with ESMTP id <35179-42363>; Sun, 6 Oct 1996 13:27:28 -0400 Received: from scubed.com (server1.scubed.com [192.31.70.21]) by nss2.CC.Lehigh.EDU (8.8.0/8.8.0) with ESMTP id NAA47731 for ; Sun, 6 Oct 1996 13:27:23 -0400 Received: from inferno.scubed.com by scubed.com (S3.4/solaris-main) id KAA04339; Sun, 6 Oct 1996 10:27:20 -0700 Received: from [192.31.66.229] by inferno.scubed.com (S3.4/s3-sgi-5) id RAA23951; Sun, 6 Oct 1996 17:25:08 GMT Message-Id: Date: Sun, 6 Oct 1996 11:31:33 -0600 Reply-To: ji3m@scubed.com Sender: owner-qrp-l@Lehigh.EDU Precedence: bulk From: ji3m@scubed.com (James R. Duffey) To: "Low Power Amateur Radio Discussion" Subject: Use Headphones Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" X-To: Joe Gervais X-Cc: qrp-l@Lehigh.EDU X-Sender: ji3m@192.31.66.42 X-Listprocessor-Version: 8.0 -- ListProcessor(tm) by CREN Status: RO On Fri, 4 Oct 1996 23:20:28 -0700 (MST) Joe wrote : >My ears were still ringing the following morning. >I had the volume on my QRP+ maxed out, the filter >cranked down to 100Hz, and my ear was literally >pressed against the speaker. Use headphones, preferrably the type that completely cover your ear. I think a good set of comfortable headphones will improve the signal to noise ratio to our ear by 3 to 6 db. No kidding. and > an occasional station >would sneak in zero-beat on my filter at what seemed >like S9+30, right into my unsuspecting ear. Back to back diodes across the headphone will limit the output to your ears on dangerously loud signals. I'm serious, for most stations a good set of headphones will do as much for your ability to copy weak signals as any improvement you can make. Try it. Duffey - KK6MC/5 James R Duffey KK6MC/5 DM65 30 Casa Loma Road Cedar Crest, NM 87008