[600MRG] ground

[Larry]

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