Topband: Measuring field strength (for the purpose of radialevaluation)

Richard (Rick) Karlquist richard at karlquist.com
Fri Dec 22 22:15:58 EST 2006


> Tom,
>
> I think you missed the point of my post. The end result desired is to
> determine how effective the added radials are.
>
> My method involves relative measurements. In this case we are comparing X
> number of radials versus Y number of radials. As one adds radials
> on a ground
> mounted vertical, the feedpoint impedance will decrease as the
> ground losses are
> lowered. So, one adds radials and measures the feedpoint
> impedance. When the
> impedance stops decreasing it is time to stop adding radials.
>     Dave WX7G

Dave, I have measured field strength of antennas and found cases where it
does not correlate with feedpoint impedance.  Both the impedance
measurement and the field strength measurement were done very
carefully.

Rick N6RK



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