Return-Path: Received: (qmail 24509 invoked from network); 25 Jan 2003 23:25:24 -0000 Received: from warrior.services.quay.plus.net (212.159.14.227) by mailstore with SMTP; 25 Jan 2003 23:25:24 -0000 Received: (qmail 28555 invoked from network); 25 Jan 2003 23:25:26 -0000 Received: from post.thorcom.com (193.82.116.70) by warrior.services.quay.plus.net with SMTP; 25 Jan 2003 23:25:25 -0000 X-SQ: A Received: from majordom by post.thorcom.com with local (Exim 4.12) id 18cZfM-00043O-00 for rsgb_lf_group-outgoing@blacksheep.org; Sat, 25 Jan 2003 23:24:48 +0000 Received: from [212.135.6.10] (helo=smarthost0.mail.uk.easynet.net) by post.thorcom.com with esmtp (Exim 4.12) id 18cZfM-00043F-00 for rsgb_lf_group@blacksheep.org; Sat, 25 Jan 2003 23:24:48 +0000 Received: from tnt-2-238.easynet.co.uk ([195.40.196.238] helo=erica) by smarthost0.mail.uk.easynet.net with smtp (Exim 4.10) id 18cZfL-000MMX-00 for rsgb_lf_group@blacksheep.org; Sat, 25 Jan 2003 23:24:47 +0000 Message-ID: <000101c2c4c9$5659ee00$eec428c3@erica> From: "g3ldo" To: rsgb_lf_group@blacksheep.org References: <001201c2c4a2$f7f26840$e6d9043e@mh70i> Date: Sat, 25 Jan 2003 23:18:31 -0000 MIME-Version: 1.0 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 Subject: LF: Re: TX with LOOP Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Status: No, hits=0.5 required=6.0tests=REFERENCES,SPAM_PHRASE_00_01,USER_AGENT_OEversion=2.43 X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false Werner ON6ND said ---------------------------------------------- Just made a test with a horizontal loop antenna and made QSO with F6BWO--F6CNI--DL3FDO At first sight it work FB Loop perimeter is 85 meters and 12 meters above ground Series coil is 1.5 mH series cap is home made butterfly 280 pf plate space is 20mm, current in the circuit is 3.5 Amp Cap and coil are in the shack , and two wires are going out through the wall widely spaced from the wall, and so straight to the loop . In the shack it smells like ozone Hi --------------------------------------------- Interesting! Most loops tried in the past have been vertical because then you only need two supporting masts. If this antenna is square or a rectangle then you will need four. I tried making an EZNEC model of this antenna but the results are not reliable for two reasons: the antenna is an electrically small loop and it is electrically very close to the ground. Even a free space model seemed quite lossy (-40+dBi). For what its worth changing the quality of ground material had little effect on a ground model; unlike a Marconi. The other characteristic is that the greatest gain was at 45 degrees - good sky wave. Not the sort of antenna a commercial station would use but it might be good for amateur sky-wave DX. Have the USA Lowfers tried this one out? Regards, Peter, G3LDO e-mail Web