Return-Path: <majordom@post.thorcom.com> Received: (qmail 473 invoked from network); 10 Jun 2002 13:26:49 -0000 Content-Transfer-Encoding: 8bit Received: from warrior.services.quay.plus.net (212.159.14.227) by mailstore with SMTP; 10 Jun 2002 13:26:49 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: (qmail 25644 invoked from network); 10 Jun 2002 13:26:26 -0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from post.thorcom.com (193.82.116.70) by warrior.services.quay.plus.net with SMTP; 10 Jun 2002 13:26:26 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.33 #2) id 17HP8I-00052q-00 for rsgb_lf_group-outgoing@blacksheep.org; Mon, 10 Jun 2002 14:22:54 +0100 Received: from hestia.herts.ac.uk ([147.197.200.9]) by post.thorcom.com with esmtp (Exim 3.33 #2) id 17HP8H-00052l-00 for rsgb_lf_group@blacksheep.org; Mon, 10 Jun 2002 14:22:53 +0100 Received: from gemini ([147.197.200.44] helo=gemini.herts.ac.uk) by hestia.herts.ac.uk with esmtp (Exim 3.22 #1) id 17HP8C-0004FC-00 for rsgb_lf_group@blacksheep.org; Mon, 10 Jun 2002 14:22:48 +0100 Received: from [147.197.232.252] (helo=rsch-15.herts.ac.uk) by gemini.herts.ac.uk with esmtp (Exim 3.33 #1) id 17HP8B-0000Cs-00 for rsgb_lf_group@blacksheep.org; Mon, 10 Jun 2002 14:22:47 +0100 Message-ID: <5.1.0.14.0.20020610140853.00a8e608@gemini.herts.ac.uk> X-Sender: mj9ar@gemini.herts.ac.uk X-Mailer: QUALCOMM Windows Eudora Version 5.1 Date: Mon, 10 Jun 2002 14:22:37 +0100 To: rsgb_lf_group@blacksheep.org From: "James Moritz" <j.r.moritz@herts.ac.uk> Subject: Re: LF: RE: PART 2 In-reply-to: <DDC408CAE72CD511827A0002A5131CD6D9F600@exc_wil08> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: <majordom@post.thorcom.com> Dear Bill, LF Group, At 12:34 31/05/2002 -0400, you wrote: >PS: I was working in some numbers last night for a "loop antenna designer >gone wild" scenario with 100w input. Using the max size for a loop of 1WL at >136k the width could be .65 mi and a height of 100ft. Compare with what Reino, OH1TN uses - a LW antenna 28m high and 500m long, self-resonant close to 136k (see http://gamma.nic.fi/~oh9ufo/136ant.gif). I don't know if anyone has tried to measure the ERP, but with 100W TX power, he certainly puts out one of the best signals around. If we all had antennas like this, 1W ERP would be too easy! Cheers, Jim Moritz 73 de M0BMU