Also there is an averaging area dimension for the map - I don't remember
what it is - but any given soil in an area of less than that size, can vary
quite a bit from the map values.
73 John N5CQ
-----Original Message-----
From: TowerTalk [mailto:towertalk-bounces@contesting.com] On Behalf Of
jimlux
Sent: Monday, February 8, 2016 10:16 PM
To: towertalk@contesting.com
Subject: Re: [TowerTalk] Verticals and well pipe grounding
On 2/8/16 7:54 PM, john@kk9a.com wrote:
> Interesting map. I am in the 4 millimhos per meter area. Fresh water
> areas like the Great Lakes is only 8 and there are some 30 millimhos
> areas scattered around the center of the US.
>
And bear in mind that those properties are basically at 1 MHz.
The conductivity and epsilon are frequency dependent.
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