Return-Path: Received: (qmail 31652 invoked from network); 16 Dec 2002 23:04:25 -0000 Received: from warrior.services.quay.plus.net (212.159.14.227) by mailstore with SMTP; 16 Dec 2002 23:04:25 -0000 Received: (qmail 9974 invoked from network); 16 Dec 2002 23:04:25 -0000 Received: from post.thorcom.com (193.82.116.70) by warrior.services.quay.plus.net with SMTP; 16 Dec 2002 23:04:25 -0000 X-SQ: A Received: from majordom by post.thorcom.com with local (Exim 4.10) id 18O4HA-0008Qn-00 for rsgb_lf_group-outgoing@blacksheep.org; Mon, 16 Dec 2002 23:03:52 +0000 Received: from [212.135.6.10] (helo=smarthost0.mail.uk.easynet.net) by post.thorcom.com with esmtp (Exim 4.10) id 18O4HA-0008Qe-00 for rsgb_lf_group@blacksheep.org; Mon, 16 Dec 2002 23:03:52 +0000 Received: from tnt-1-18.easynet.co.uk ([195.40.206.18] helo=erica) by smarthost0.mail.uk.easynet.net with smtp (Exim 4.10) id 18O4H9-000Apc-00 for rsgb_lf_group@blacksheep.org; Mon, 16 Dec 2002 23:03:51 +0000 Message-ID: <000401c2a557$a3107de0$12ce28c3@erica> From: "g3ldo" To: rsgb_lf_group@blacksheep.org References: <003501c2a54e$f83bdca0$d77c7ad5@main> Date: Mon, 16 Dec 2002 23:04:40 -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: Earth resistance Content-Type: text/plain; charset=Windows-1252; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Status: No, hits=0.5 required=5.0tests=REFERENCES,SPAM_PHRASE_00_01,USER_AGENT_OEversion=2.42 Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group I had reported earlier that my antenna current varies considerably for reasons that I don't understand. Last week, during a session of 73kHz T/A tests the weather was very cold and dry with a moderate north east wind. During that period the antenna current varied in a cyclic manner over a 24hour period from 3.9amps to 5amps!. During the periods of high current the power supply current meter indicated that the transmitter was using more power. The weather in the last few days has been very wet and the lawn is saturated. The maximum antenna current is 3 amps and that is after I have adjusted to matching transformer to try and compensate for chang in losses. Furthermore the current variation over the 24 hour period is not apparent. I am located about 400m from the beach. The ground comprises 3m of heavy clay over shingle. The periods of high current appear to coincide with high tides. Ground effects come in the black art category. Regards, Peter, G3LDO e-mail Web