Envelope-to: dave@picks.force9.co.uk Delivery-date: Sun, 31 Jul 2005 22:54:05 +0100 Received: by ptb-mxcore16.plus.net with spam-scanned (PlusNet MXCore v2.00) id 1DzLky-0005TV-EE for dave@picks.force9.co.uk; Sun, 31 Jul 2005 22:54:04 +0100 Received: from post.thorcom.com ([193.82.116.20]) by ptb-mxcore16.plus.net with esmtp (PlusNet MXCore v2.00) id 1DzLky-0005TI-6w for dave@picks.force9.co.uk; Sun, 31 Jul 2005 22:54:04 +0100 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1DzLkL-00075z-DC for rs_out_1@blacksheep.org; Sun, 31 Jul 2005 22:53:25 +0100 Received: from [193.82.116.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1DzLkK-00075p-Q7 for rsgb_lf_group@blacksheep.org; Sun, 31 Jul 2005 22:53:24 +0100 Received: from imo-d20.mx.aol.com ([205.188.139.136]) by relay1.thorcom.net with esmtp (Exim 4.51) id 1DzLx0-00035J-Jm for rsgb_lf_group@blacksheep.org; Sun, 31 Jul 2005 23:06:33 +0100 Received: from MarkusVester@aol.com by imo-d20.mx.aol.com (mail_out_v38_r4.1.) id l.be.2de27541 (16781) for ; Sun, 31 Jul 2005 17:53:11 -0400 (EDT) From: MarkusVester@aol.com Message-ID: Date: Sun, 31 Jul 2005 17:53:11 EDT To: rsgb_lf_group@blacksheep.org MIME-Version: 1.0 X-Mailer: 8.0 for Windows sub 6104 Subject: Re: LF: Suitable ground? Content-Type: text/html; charset=windows-1252 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-PN-SpamFiltered: by PlusNet MXCore (v2.00) Content-transfer-encoding: 8bit Dear J.B. and LF,

a deep well in high-impedance soil - add a long wire flat on the ground, and you could get a rather efficient (magnetic) earth-antenna! They've done it on a larger scale, at the Clam Lake ELF transmitter facility:

http://enterprise.spawar.navy.mil/getfile.cfm?contentId=214

73 de Markus, DF6NM