Return-Path: Received: (qmail 7398 invoked from network); 4 Sep 2002 17:23:56 -0000 Received: from marstons.services.quay.plus.net (212.159.14.223) by mailstore with SMTP; 4 Sep 2002 17:23:56 -0000 Received: (qmail 19248 invoked by uid 10001); 4 Sep 2002 17:29:30 -0000 Received: from post.thorcom.com (193.82.116.70) by marstons.services.quay.plus.net with SMTP; 4 Sep 2002 17:29:30 -0000 X-SQ: A Received: from majordom by post.thorcom.com with local (Exim 4.10) id 17mdqz-0000WM-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 04 Sep 2002 18:22:09 +0100 Received: from [194.73.73.111] (helo=gadolinium.btinternet.com) by post.thorcom.com with esmtp (Exim 4.10) id 17mdqz-0000WC-00 for rsgb_lf_group@blacksheep.org; Wed, 04 Sep 2002 18:22:09 +0100 Received: from host62-7-109-113.in-addr.btopenworld.com ([62.7.109.113] helo=j1r9b7) by gadolinium.btinternet.com with smtp (Exim 3.22 #8) id 17mdqy-00072P-00 for rsgb_lf_group@blacksheep.org; Wed, 04 Sep 2002 18:22:08 +0100 Message-ID: <002501c25436$87328f40$716d073e@j1r9b7> From: "Derek Atter" To: rsgb_lf_group@blacksheep.org References: <000001c24c38$ea026420$f976073e@main> <002001c2513c$a9f3a5c0$4bdf7ad5@j1r9b7> Date: Wed, 4 Sep 2002 18:13:42 +0100 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.00.2919.6600 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Subject: LF: Re: Re: E-field antennas Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Status: No, hits=0.0 required=5.0tests=noneversion=2.31 Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Herewith a correction to my note re E-field antennas. The active antennas in fact both used approx 1m whip and not 3m as indicated in my note. ( I must have been thinking in feet and writing in metres !!). As I indicated later in the note, I found that there appeared to be little advantage in using a whip more than about 1m long. 73, Derek Atter G3GRO ----- Original Message ----- From: "Derek Atter" To: Sent: Saturday, August 31, 2002 11:20 PM Subject: LF: Re: E-field antennas > Hi all, > > Re Alan Melia's posting on E-field antennas (Aug. 25th), I confirm his > comment that I did carry out a number of tests on two E-field active > antennas each having roughly a 3m whip, one an ex-Decca Navigator design > using op-amps, and the other an AMRAD high dynamic range design using a > Crystalonics high current FET and published in QST in September last year (I > think it was).Both of these designs feed DC up the coax to the active > element.