Envelope-to: dave@picks.force9.co.uk
Delivery-date: Wed, 03 Aug 2005 08:57:19 +0100
From: "Mike Dennison" <mike.dennison@ntlworld.com>
To: rsgb_lf_group@blacksheep.org
Date: Wed, 03 Aug 2005 08:56:09 +0100
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Subject: Re: LF: Soil Conductivity Measurement
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> I´am 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

Although it is interesting to know the ground conductivity, the main 
losses in a small LF antenna are environmental. This includes losses 
in trees, buildings etc. These are sometimes all lumped together and 
misleadingly described as 'ground losses'.

A more useful thing to measure would be the total environmental loss 
which varies with the seasons (my antenna needs much more inductance 
when the leaves fall off the trees) and weather effects such as rain 
and frozen soil.

Mike, G3XDV
(currently QRT because of high work loads)
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