Return-Path: Received: from mtain-me12.r1000.mx.aol.com (mtain-me12.r1000.mx.aol.com [172.29.96.148]) by air-md09.mail.aol.com (v129.4) with ESMTP id MAILINMD094-8b974c17e62c283; Tue, 15 Jun 2010 16:44:28 -0400 Received: from post.thorcom.com (post.thorcom.com [193.82.116.20]) by mtain-me12.r1000.mx.aol.com (Internet Inbound) with ESMTP id 30A1D38000102; Tue, 15 Jun 2010 16:44:26 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1OOcyk-0003EG-FH for rs_out_1@blacksheep.org; Tue, 15 Jun 2010 21:43:26 +0100 Received: from [193.82.116.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1OOcyj-0003E7-TQ for rsgb_lf_group@blacksheep.org; Tue, 15 Jun 2010 21:43:25 +0100 Received: from mail-bw0-f43.google.com ([209.85.214.43]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1OOcyg-00066O-0W for rsgb_lf_group@blacksheep.org; Tue, 15 Jun 2010 21:43:25 +0100 Received: by bwz19 with SMTP id 19so3145718bwz.16 for ; Tue, 15 Jun 2010 13:43:21 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:received:in-reply-to :references:date:message-id:subject:from:to:content-type; bh=6MPrb4CPWFe7XyBc7Cz+Kn0ICqp2MUCcJjeml7vUG3o=; b=dvgDGDh9jlGQxZt8ZQN324oNEIpOzJc/r8zOyPTpx5OTnZtzX9ghTDevDjtMv9gjSa eaiLz+K0QP4Bm6BziO7brlb0sQ/QsK4H62PnEsnCz9aK6CmGyae0GUGnWGr0689BpP6X DR989LXmMEwa5kZhzd7ZLYTiDZ5++Jj9uCAIQ= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :content-type; b=ifRFNm7WMo2sE7w4Y8BUIrF/+qiNcHU0BJs6VjPtVjkI7r0c7fJ+qSuO1W0CpSB3zK +gVF/H1LMm/PoInLcOib9+TzzdgwCZdWvirRzjeQCc3SUqwCrzsLzIfRIDjqhyz64sfJ vS21cNYXkmQDRx1dabwTLfetzTZkMiLGCPRLs= MIME-Version: 1.0 Received: by 10.204.83.209 with SMTP id g17mr5844251bkl.120.1276634600984; Tue, 15 Jun 2010 13:43:20 -0700 (PDT) Received: by 10.204.100.69 with HTTP; Tue, 15 Jun 2010 13:43:20 -0700 (PDT) In-Reply-To: <4C17E25A.3050704@gmx.com> References: <4C17E25A.3050704@gmx.com> Date: Tue, 15 Jun 2010 21:43:20 +0100 Message-ID: From: Roger Lapthorn To: rsgb_lf_group@blacksheep.org DomainKey-Status: good (testing) X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=disabled,HTML_MESSAGE=0.001 Subject: Re: LF: Ground electrode antenna on 500kHz RX (and TX?) Content-Type: multipart/alternative; boundary=0016e6d56651e650d6048917a73f X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.5 required=5.0 tests=HTML_20_30,HTML_MESSAGE autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false x-aol-global-disposition: G X-AOL-SCOLL-AUTHENTICATION: mail_rly_antispam_dkim-m212.2 ; domain : gmail.com DKIM : pass x-aol-sid: 3039ac1d60944c17e62a6ece X-AOL-IP: 193.82.116.20 X-Mailer: Unknown (No Version) --0016e6d56651e650d6048917a73f Content-Type: text/plain; charset=ISO-8859-1 Mike, It consists of 1 ground rod about 1.5m long in the soil at the bottom of the back garden and a connection to the copper pipes in the house at the other separated by 20m of wire. Most of this wire runs at about 1.5m above from the ground running along the wooden fence. It must form a loop antenna mainly within the ground, much as appears to be happening on the sub-9kHz tests. 73s Roger G3XBM On 15 June 2010 21:28, Mike-WE0H wrote: > Are you going to post pictures on your website of this antenna? Sounds > interesting. > > Mike > WE0H > EN35hj > > > > > > Roger L wrote: > >> This evening I tried listening with my 20m spaced ground electrode pair >> "antenna" on 500kHz WSPR. To my surprise it received G3ZJO and G7NKS at >> -26dB S/N. I'm tempted to try this on TX on 500kHz and see if anyone can >> receive me. On sub-9kHz it looks close to 50 ohms resistive but not sure >> what it looks like on 500kHz. >> >> This was the first time I've listened/looked on 500kHz for several weeks. >> >> 73s >> Roger G3XBM >> >> >> -- >> http://g3xbm-qrp.blogspot.com/ >> http://www.g3xbm.co.uk >> http://www.youtube.com/user/g3xbm >> G3XBM GQRP 1678 ISWL G11088 >> > > -- http://g3xbm-qrp.blogspot.com/ http://www.g3xbm.co.uk http://www.youtube.com/user/g3xbm G3XBM GQRP 1678 ISWL G11088 --0016e6d56651e650d6048917a73f Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Mike,

It consists of 1 ground rod about 1.5m long in the soil at th= e bottom of the back garden and a connection to the copper pipes in the ho= use at the other separated by 20m of wire. Most of this wire runs at about= 1.5m above from the ground running along the wooden fence. It must form= a loop antenna mainly within the ground, much as appears to be happening= on the sub-9kHz tests.

73s
Roger G3XBM



On 15 Jun= e 2010 21:28, Mike-WE0H <we0h@gmx.com> wrote:
Are you going to post pictures on your website of this antenna? Sounds int= eresting.

Mike
WE0H
EN35hj





Roger L wrote:
This evening I tried listening with my 20m spaced ground electrode pair &q= uot;antenna" on 500kHz WSPR. To my surprise it received G3ZJO and G7N= KS at -26dB S/N. =A0I'm tempted to try this on TX on 500kHz and see if= anyone can receive me. On sub-9kHz it looks close to 50 ohms resistive bu= t not sure what it looks like on 500kHz.

This was the first time I've listened/looked on 500kHz for several wee= ks.

73s
Roger G3XBM


--
http://g3xbm-= qrp.blogspot.com/
http://www.g3xbm.co.u= k
http://www= .youtube.com/user/g3xbm
G3XBM =A0 =A0GQRP 1678 =A0 =A0 =A0ISWL G11088




--
http://g3xbm-qrp.blogspot.com/
http://www.g3xbm.co.uk
http://www.youtube.com/user/g3xbm G3XBM =A0 =A0GQRP 1678 =A0 =A0 =A0ISWL G11088
--0016e6d56651e650d6048917a73f--