[600MRG] ground

[Edward R Cole]

Larry,

What you describe sounds like definition of a desert.  Only thing in 
your soil that will hold moisture might be the cliche.  I suspect 
your soil never gets wet enough to cause a significant change in 
conductivity.  Also helps is your ground radial system.

I believe I once visited your place (probably on a trip to attend the 
conference at Moses Lake).  It looks a lot like desert unless you irrigate it.

73, Ed - KL7UW

At 06:45 AM 2/7/2015, Larry wrote:
>OK, what am I missing here?
>
>My 630 meter vertical antenna system shows no measurable difference 
>in feed point impedance between bone dry dirt and soggy wet dirt.
>
>For that matter neither does my 160 meter vertical.
>
>My dirt is composed of volcanic ash, sand, and rock. The so called 
>top soil averages 30 inches deep over cliche and basalt. It is so 
>bad during summer that electric fences are no longer effective 
>unless the pasture is irrigated!
>
>The 160 vertical is over a radial system composed of 82x 100 foot 
>symmetrically positioned buried wires in a clear 1.5 acre area. I. 
>E. no trees, no towers, no houses, etc.
>
>The 630 meter vertical is over 16x 25 foot buried wires but the area 
>is more cluttered with nearby conductive objects like metal 
>buildings and towers.
>
>So can anybody tell me why I NEVER see variations in feedpoint 
>impedance due to ground changes on ANY vertical antenna system I have used?
>
>73,
>
>Larry - W7IUV / WH2XGP
>
>
>
>
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73, Ed - KL7UW
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