Return-Path: Received: from mtain-mh06.r1000.mx.aol.com (mtain-mh06.r1000.mx.aol.com [172.29.96.218]) by air-df06.mail.aol.com (v128.3) with ESMTP id MAILINDF061-5ef64bcc53e334b; Mon, 19 Apr 2010 09:00:19 -0400 Received: from post.thorcom.com (post.thorcom.com [193.82.116.20]) by mtain-mh06.r1000.mx.aol.com (Internet Inbound) with ESMTP id 152913800008E; Mon, 19 Apr 2010 09:00:07 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1O3qZ4-00064h-SS for rs_out_1@blacksheep.org; Mon, 19 Apr 2010 13:59:02 +0100 Received: from [193.82.116.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1O3qZ4-00064Y-BP for rsgb_lf_group@blacksheep.org; Mon, 19 Apr 2010 13:59:02 +0100 Received: from mail-bw0-f217.google.com ([209.85.218.217]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1O3qZ1-0001sn-FM for rsgb_lf_group@blacksheep.org; Mon, 19 Apr 2010 13:59:02 +0100 Received: by bwz9 with SMTP id 9so4578396bwz.29 for ; Mon, 19 Apr 2010 05:58:53 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:in-reply-to:references :date:received:message-id:subject:from:to:content-type; bh=LET8UuVSQmY6JBIm1lyfrZiJvVSt1/fw9GDs0M46GMo=; b=lwSrVE3ERSGLoDcurlDKe8Q+SAytAo2qZkRrCGDZt4Lj6pT1vuPHs/FcFdGAA4jsJB domtR+fhp3d58tK/UEFiaE9T+zSiNol7Fe6Aen5oykna9xpAvn85LiHmz/KcE95jq6Ko IeRG0Bk00gqORF0dpl/9w5SHLUJgNy/f3HQLQ= 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=SsQXBKNrbuP9dDr3GU+Q28lyV1Fa8+gQcT7YmVIaNFfRecFN5wbW9Pg/dC95znks+G B0P27AA024k9xkRjpHrHUSbCBVoctrg5ELQWaR1ZpWI9MJJxDjOTKD9PtM+U4KN3NB2N iVoYV3SQs7a9NHlhmreIv+tzibAziXHdsusfI= MIME-Version: 1.0 Received: by 10.204.122.16 with HTTP; Mon, 19 Apr 2010 05:58:52 -0700 (PDT) In-Reply-To: References: Date: Mon, 19 Apr 2010 13:58:52 +0100 Received: by 10.204.48.20 with SMTP id p20mr225356bkf.56.1271681932501; Mon, 19 Apr 2010 05:58:52 -0700 (PDT) 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: Earth systems Content-Type: multipart/alternative; boundary=0016e6d778fddaa1cd048496855a X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.0 required=5.0 tests=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-m288.1 ; domain : gmail.com DKIM : pass x-aol-sid: 3039ac1d60da4bcc53d70a80 X-AOL-IP: 193.82.116.20 X-Mailer: Unknown (No Version) --0016e6d778fddaa1cd048496855a Content-Type: text/plain; charset=ISO-8859-1 Harry, If you have copper/metal pipes (as I do) in and to the house, then I think you're right that the earth they provide can be quite effective. This is my experience at 160m and 600m. 73s Roger G3XBM On 19 April 2010 09:45, Harry Woodhouse wrote: > Would experience of an 80 year old timer be any use? Most water mains are > now plastic, but if your house is pre-war like mine, the original disused > iron main still exists somewhere. I found the old pipe in 2 neighbour's > gardens, and connected a 1KHz signal to each end. I then searched my garden > with a multi-turn loop for maximum signal. Digging down 4 feet I found the > pipe. I then made TWO connections to it, filing the pipe clean, using 2 > jubilee clips, and covering the lot with grease & tape. The idea of 2 > connections is that you can always check continuity with an AVO to make sure > BOTH are still connected to the pipe. > > Regards, > > Harry G3MFW > -- http://g3xbm-qrp.blogspot.com/ http://www.g3xbm.co.uk http://www.youtube.com/user/g3xbm G3XBM GQRP 1678 ISWL G11088 --0016e6d778fddaa1cd048496855a Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Harry,

If you have copper/metal pipes (as I do) in and to the house= , then I think you're right that the earth they provide can be quite= effective. This is my experience at 160m and 600m.

73s
Roger G3= XBM

On 19 April 2010 09:45, Harry Woodhouse <hwoodhous= e3@googlemail.com> wrote:
Would experience of an 80 year old timer be any use? Most water mains are= now plastic, but if your house is pre-war like mine, the original disused= iron main still exists somewhere. I found the old pipe in 2 neighbour'= ;s gardens, and connected a 1KHz signal to each end. I then searched my ga= rden with a multi-turn loop for maximum signal. Digging down 4 feet I foun= d the pipe. I then made TWO connections to it, filing the pipe clean, usin= g 2 jubilee clips, and covering the lot with grease & tape. The idea= of 2 connections is that you can always check continuity with an AVO to= make sure BOTH are still connected to the pipe.

=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0= =A0=A0=A0=A0=A0=A0 Regards,

=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0= =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 Harry G3MF= W



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