Rather than looking just at resistance, why not try to more fully characterize
ground parameters? I fuzzily recall that a VE2 working at the Canadian
government's antenna lab suggested years ago that you erect a very low dipole
for the frequency of interest and then tweak ground parameters in a NEC-2 model
until the resonant frequency and feedpoint impedance closely match the observed
values. Is there something wrong with that approach?
73, Pete N4ZR
At 12:19 AM 8/14/2006, Jim Lux wrote:
>At 03:25 PM 8/8/2006, David Robbins K1TTT wrote:
>>Way, yes... simple, not really. There are meters made for measuring ground
>>system resistance, but they rely on either a very good reference ground
>>nearby, or a couple of rods spaced the right distances apart to act as a
>>reference. Its been some years since I used one so I forget the exact
>>process, but its spelled out in detail in the manuals. The one I used last
>>was made by Biddle if I remember correctly. Check with a local electrician
>>or electric company crew, they may have one and could make the measurements
>>for you. Or the meters can be rented from electronic rental places if you
>>want to do it yourself.
>And, of course, such a meter would measure at some frequency OTHER than the
>HF frequency you're actually interested in.
>I suppose one could do something like measure the received signal strength
>from a fixed beacon, and keep adding radials until the difference is "small
>enough".. Lots of traps here for the unwary, the vagaries of propagation
>being but one.
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