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Topband: Earth conductivity

To: <topband@contesting.com>
Subject: Topband: Earth conductivity
From: "Gary Hinson" <Gary@isect.com>
Date: Fri, 26 Feb 2010 19:07:01 +1300
List-post: <topband@contesting.com">mailto:topband@contesting.com>
> Beverages don't work as well over salt water, or very highly
> conductive earth, and that's just physics, not poor construction.

Talking of that, any idea how conductive my soil might be?  It's about 12" of 
topsoil on a clay
base, the depth of which exceeds any holes I have yet dug.  It's the sort of 
solid Real Man's Clay I
could probably lever out with a spade, leave to dry in the sun, and build a 
house from.  If they's
have asked me, I'd have offered to make the heat-refractive tiles for the space 
shuttle from it.

I know I really ought to measure it, and I have the design somewhere hereabouts 
for the gizmo to
measure ground conductivity which I *will* build one day.  And I may be lucky 
enough to find
geological maps of this area at some point to find out what lurks beneath.  But 
for now, what do you
say: is topsoil-over-clay high, medium or low conductivity in the grand scheme 
of things?  

And, given that, what are the implications?   

I have ~20 acres of the stuff, with access to hundreds more in the pine forest 
surrounding our
clearing, so I'd like to plan some cracking antennas for Topband.  The QTH is 
basically a N/S ridge
about 200ft wide, topped with 80ft pines, with 45-degree slopes (too steep for 
this farming novice
to risk a quad-bike on) to E and W.

What would the panel suggest?

73 
Gary  ZL2iFB

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UR RST IS ... ... ..9 QSB QSB - hw? BK

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