Return-Path: Received: from mtain-mj05.r1000.mx.aol.com (mtain-mj05.r1000.mail.aol.com [172.21.164.89]) by air-db04.mail.aol.com (v129.4) with ESMTP id MAILINDB043-86464c2731433d2; Sun, 27 Jun 2010 07:08:51 -0400 Received: from post.thorcom.com (post.thorcom.com [193.82.116.20]) by mtain-mj05.r1000.mx.aol.com (Internet Inbound) with ESMTP id 49931380000A3; Sun, 27 Jun 2010 07:08:48 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1OSpiA-0000Kc-RY for rs_out_1@blacksheep.org; Sun, 27 Jun 2010 12:07:42 +0100 Received: from [193.82.116.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1OSpiA-0000KT-7J for rsgb_lf_group@blacksheep.org; Sun, 27 Jun 2010 12:07:42 +0100 Received: from 113-mo2-8.acn.waw.pl ([62.121.95.113] helo=paranoid.lipkowski.org) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1OSpi9-0003Fh-Fd for rsgb_lf_group@blacksheep.org; Sun, 27 Jun 2010 12:07:42 +0100 Received: from paranoid.lipkowski.org (localhost [127.0.0.1]) by paranoid.lipkowski.org (8.13.7/8.13.7) with ESMTP id o5RB7c85002524 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO) for ; Sun, 27 Jun 2010 13:07:38 +0200 Received: from localhost (sq5bpf@localhost) by paranoid.lipkowski.org (8.13.7/8.13.6/Submit) with ESMTP id o5RB7cm7002521 for ; Sun, 27 Jun 2010 13:07:38 +0200 X-Authentication-Warning: paranoid.lipkowski.org: sq5bpf owned process doing -bs Date: Sun, 27 Jun 2010 13:07:38 +0200 (CEST) From: Jacek Lipkowski To: rsgb_lf_group@blacksheep.org In-Reply-To: <365914936.1283686.1277635800331.JavaMail.fmail@mwmweb036> Message-ID: References: <4C23FC42.8040204@iup.uni-heidelberg.de><38A51B74B884D74083D7950AD0DD85E82A1C66@File-Server-HST.hst.e-technik.tu-darmstadt.de><4C25AE1F.7060807@gmx.com> , <38A51B74B884D74083D7950AD0DD85E82A1C68@File-Server-HST.hst.e-technik.tu-darmstadt.de> <365914936.1283686.1277635800331.JavaMail.fmail@mwmweb036> MIME-Version: 1.0 X-Spam-Score-sq5bpf: -2.601 () BAYES_00,SPF_HELO_PASS,SPF_PASS X-Scanned-By: MIMEDefang 2.56 on 10.1.3.10 X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=disabled,none Subject: Re: VLF: New test Content-Type: MULTIPART/MIXED; BOUNDARY="17435139-1604303822-1277636857=:28771" 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=none 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: S x-aol-sid: 3039400c89aa4c27314026b9 X-AOL-IP: 193.82.116.20 X-Mailer: Unknown (No Version) --17435139-1604303822-1277636857=:28771 Content-Type: TEXT/PLAIN; charset=iso-8859-2; format=flowed Content-Transfer-Encoding: QUOTED-PRINTABLE On Sun, 27 Jun 2010, Horst St=F6cker wrote: > yesterday I tried to reproduce Rogers experiments with VLF transmissions= =20 > over the local gas and water mains. I connected one wire to the=20 > equipotential busbar of my house. The other wire is connected to a 60cm= =20 > copper rod in about 15m distance in the garden - very similar to Rogers= =20 > setup. I measured about 180 ohm DC. I tried different frequencies below= =20 > 9kHz with an audio transformer. The "walk around" reception was very=20 > disappointing, just a few meters. [...] theoretically you could try a analogue phone line (of course always ask=20 for premission etc). one of the wires are grounded at the "remote module"= =20 (or whatever it's called), or the phone exchange (it you're lucky). this= =20 gives you at least a few hundred meters of wire. the 0 line of the power= =20 lines might also be fun if you live a long way from the transformer, and= =20 the 0 line is not grounded somewhere near. coupling to commercial structures is fun :) http://acid.ch.pw.edu.pl/~sq5bpf/ham/vlf_beacon20090711/vlf_sggw_rosola.jp= g=20 (a bit below 8900kHz, distance abt 550m) VY 73 Jacek / SQ5BPF --17435139-1604303822-1277636857=:28771--