email@example.com wrote: (snip)
> A concrete pad is probably sufficient insulation with a low feedpoint
> impedance. Use a baseplate on the bottom section. (Saves lotsa $$$).
> (WA4CTA found a noticable change in feed impedance of his elevated GP
> reverse fed antenna when he removed the ground wires from his concrete
> pad mounted tower, and no change in impedance when it rained.)
> de Tom - N4KG
I believe concrete is a GOOD conductor of electricity especially when
wet. This would explain why the impedence did not change when the
radials were removed on a rainy day.
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