Envelope-to: dave@picks.force9.co.uk Delivery-date: Mon, 14 Nov 2005 16:57:12 +0000 Received: by ptb-mxcore15.plus.net with spam-scanned (PlusNet MXCore v2.00) id 1Ebhdn-0002mP-6C for dave@picks.force9.co.uk; Mon, 14 Nov 2005 16:57:11 +0000 Received: from post.thorcom.com ([193.82.116.20]) by ptb-mxcore15.plus.net with esmtp (PlusNet MXCore v2.00) id 1Ebhdm-0002lC-TY for dave@picks.force9.co.uk; Mon, 14 Nov 2005 16:57:11 +0000 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1EbhdS-0006Tk-NU for rs_out_1@blacksheep.org; Mon, 14 Nov 2005 16:56:50 +0000 Received: from [193.82.116.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1EbhdS-0006Tb-CR for rsgb_lf_group@blacksheep.org; Mon, 14 Nov 2005 16:56:50 +0000 Received: from imo-d21.mx.aol.com ([205.188.144.207]) by relay1.thorcom.net with esmtp (Exim 4.51) id 1EbiTh-0007Nx-Eg for rsgb_lf_group@blacksheep.org; Mon, 14 Nov 2005 17:50:52 +0000 Received: from WarmSpgs@aol.com by imo-d21.mx.aol.com (mail_out_v38_r6.3.) id l.1a4.4413e5ed (3866) for ; Mon, 14 Nov 2005 11:56:38 -0500 (EST) From: WarmSpgs@aol.com Message-ID: <1a4.4413e5ed.30aa1bc6@aol.com> Date: Mon, 14 Nov 2005 11:56:38 EST To: rsgb_lf_group@blacksheep.org MIME-Version: 1.0 X-Mailer: 9.0 for Windows sub 5042 Subject: Re: LF: How measuring Ground conductivity ? 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

Hello Uwe,

This procedure basically measures ground rod effectiveness more than the soil conductivity, although fairly good conductivity can be inferred from the result.

If you are trying to measure earth conductivity in mS/m for RF propagation purposes, however, the technique is not very helpful. In fact, there is no easy way to measure this property directly at RF. From a practical engineering standpoint, we generally do it by measuring the attenuation of a groundwave radio signal traversing a given distance of the soil in question.

John