Envelope-to: dave@picks.force9.co.uk Delivery-date: Mon, 01 Aug 2005 12:03:58 +0100 Received: by pih-mxcore11.plus.net with spam-scanned (PlusNet MXCore v2.00) id 1DzY5M-0000DP-Al for dave@picks.force9.co.uk; Mon, 01 Aug 2005 12:03:58 +0100 Received: from post.thorcom.com ([193.82.116.20]) by pih-mxcore11.plus.net with esmtp (PlusNet MXCore v2.00) id 1DzY5L-0000D2-Vy for dave@picks.force9.co.uk; Mon, 01 Aug 2005 12:03:56 +0100 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1DzY4p-0008VY-57 for rs_out_1@blacksheep.org; Mon, 01 Aug 2005 12:03:23 +0100 Received: from [193.82.116.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1DzY4o-0008VP-Lj for rsgb_lf_group@blacksheep.org; Mon, 01 Aug 2005 12:03:22 +0100 Received: from smtp808.mail.ukl.yahoo.com ([217.12.12.198]) by relay1.thorcom.net with smtp (Exim 4.51) id 1DzYHi-00069F-Pp for rsgb_lf_group@blacksheep.org; Mon, 01 Aug 2005 12:16:44 +0100 Received: (qmail 7588 invoked from network); 1 Aug 2005 11:03:15 -0000 Received: from unknown (HELO MJUSonyLaptop) (m.j.underhill@hg1.btinternet.com@81.157.2.115 with login) by smtp808.mail.ukl.yahoo.com with SMTP; 1 Aug 2005 11:03:15 -0000 From: "Mike Underhill" To: rsgb_lf_group@blacksheep.org Date: Mon, 1 Aug 2005 12:03:18 +0100 Message-ID: <005301c59688$9fa05250$6405a8c0@MJUSonyLaptop> MIME-Version: 1.0 X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.6626 X-MIMEOLE: Produced By Microsoft MimeOLE V6.00.2900.2180 In-Reply-To: <003301c5967e$422fc600$0600a8c0@router> Importance: Normal Subject: LF: RE: Soil Conductivity Measurement 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

Uwe, I would be very interested in a plot of how the conductivity has varied over the year and in what the largest variation of maximum to minimum that you have found? 

 

It would also be useful to measure at a frequency closer to 136Khz for comparison purposes?  It would have to be at a frequency away from interference and the test signal would have to be strong enough to overcome interference. 

 

Has anyone on the list experience in measuring ground conductivity at such frequencies?

 

Mike – G3LHZ

 

IŽam mesuring ground conductivity over almost 1 year regularly

 

today it was 15,6 Ohm / m ( measured with 16Volt@ 50Hz )

 

 

I try to built a measuring device with other frequency , somthing odd ( no multibles from 50Hz, thinking about  111 Hz - )

and automatic daily measurements ( at present times done manually)

 

Would like to discuss about it

 

Uwe, DK1KQ

 

 


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