Return-Path: Received: (qmail 1057 invoked from network); 25 Aug 2002 13:14:19 -0000 Received: from marstons.services.quay.plus.net (212.159.14.223) by mailstore with SMTP; 25 Aug 2002 13:14:19 -0000 Received: (qmail 3391 invoked by uid 10001); 25 Aug 2002 13:19:33 -0000 Received: from post.thorcom.com (193.82.116.70) by marstons.services.quay.plus.net with SMTP; 25 Aug 2002 13:19:33 -0000 X-SQ: A Received: from majordom by post.thorcom.com with local (Exim 3.33 #2) id 17iyvM-00029z-00 for rsgb_lf_group-outgoing@blacksheep.org; Sun, 25 Aug 2002 16:03:32 +0100 Received: from tungsten.btinternet.com ([194.73.73.81]) by post.thorcom.com with esmtp (Exim 3.33 #2) id 17iyvL-00029u-00 for rsgb_lf_group@blacksheep.org; Sun, 25 Aug 2002 16:03:31 +0100 Received: from host62-7-118-249.in-addr.btopenworld.com ([62.7.118.249] helo=main) by tungsten.btinternet.com with smtp (Exim 3.22 #8) id 17ixAm-0000bu-00 for rsgb_lf_group@blacksheep.org; Sun, 25 Aug 2002 14:11:21 +0100 Message-ID: <000001c24c38$ea026420$f976073e@main> From: "Alan Melia" To: "LF-Group" Subject: LF: E-field antennas Date: Sun, 25 Aug 2002 11:18:41 +0100 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.5 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hi all, as I understand it the performance of an E-field antenna is more related to its height of installation above ground that to any effect of the amplifier. As we all know an amplifier will amplify noise as well as the signal, its real purpose is to extract a signal efficiently from the very ofdd impedance of a short wire. It may well be that this type of aerial is better suited to the tight filtering necessary to keep the strong stations in mainland Europe from generating intermodulation, and will also give some advantages to those without the 'real estate' or mast height to erect wire aerials. To me this suggests that an E-field antenna at 20m height will work about as well as a 20m vertical wire......or have I missed something ?? I suppose if you house is in a clearing amongst tall trees it could have a distinct advantage over a wire. I think Derek G3GRO has done some comparative tests?. Cheers de Alan G3NYK alan.melia@btinternet.com