Return-Path: Received: (qmail 3232 invoked from network); 3 Mar 2002 09:24:43 -0000 Received: from unknown (HELO warrior.services.quay.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 3 Mar 2002 09:24:43 -0000 Received: (qmail 14882 invoked from network); 3 Mar 2002 09:24:44 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior.services.quay.plus.net with SMTP; 3 Mar 2002 09:24:44 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.33 #2) id 16hTdD-0002YF-00 for rsgb_lf_group-outgoing@blacksheep.org; Sun, 03 Mar 2002 10:54:19 +0000 Received: from rhenium.btinternet.com ([194.73.73.93]) by post.thorcom.com with esmtp (Exim 3.33 #2) id 16hTdC-0002YA-00 for rsgb_lf_group@blacksheep.org; Sun, 03 Mar 2002 10:54:18 +0000 Received: from host62-7-95-41.in-addr.btopenworld.com ([62.7.95.41] helo=dave) by rhenium.btinternet.com with smtp (Exim 3.22 #8) id 16hS6K-0006vC-00 for rsgb_lf_group@blacksheep.org; Sun, 03 Mar 2002 09:16:16 +0000 Message-ID: <002501c1c294$4a8eb7a0$295f073e@dave> From: "Dave Sergeant" To: "rsgb_lf_group" References: <3C80AB6D.DAFB4C83@netscapeonline.co.uk> Subject: Re: LF: RE: Diversity Date: Sun, 3 Mar 2002 09:07:33 -0000 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 5.50.4522.1200 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: >From Dave G3YMC G3KEV wrote: >Maybe your friends are transmitting on full size loops. >Let me know how you get on and try a vertical as well for comparison. As one of those 'friends' perhaps I should comment! Mal will presumably expect his large 'normal' antenna to outperform a loop at the same location unless it is very large, as he has a very large site and can erect big antennas. I have a very small site, well shielded with poor ground conditions. My loop is a means to get on the band where I would not otherwise be able to do so, and to be realistic I do not expect big results from my qth whatever I do. I have recently done comparitive tests with a 10m top loaded vertical, the best I can sensibly achieve, and there is certainly not the huge improvement Mal suggests. Details of these tests are on my website at http://www.dsergeant.btinternet.co.uk/vertical.htm. It may be that the vertical is not optimised, and in anycase is difficult to get clear of vegetation etc - the very problem Bill Ashlock in the USA has which he has overcome with loops. There are some signals which I can hear better on the vertical, but they are few and generally in the direction of the loop nulls, and in a typical urban location local noise normally makes the loop the best all round antenna. No big expectations of dx here - if Mal can only just hear me he should remember it is 325km and no mean distance for my set up. It may be a compromise, and certainly does not perform like some setups do, but the loop does at least get me on the air from a difficult qth. I am currently building an Elecraft K2 10W hf transceiver. When that is complete shortly I shall devoting far more time to the hf bands. With normal cw activity on 136 at an all time low I can no longer devote all my time to that. 73s Dave G3YMC dsergeant@iee.org dsergeant@btinternet.com http://www.dsergeant.btinternet.co.uk