[Antennas] Verticals And Trees

2002年9月28日 15:41:16 -0500

>IMHO, verticals, like nearly all other antenna I can think of, do better
the
>higher they are mounted (at least up to a wavelength or two above ground).

Are you speaking of 1/4w or 1/2w verticals here Jim? Do you understand
the difference? You seem to be lumping them all in one group ...
>Why ground mount when you have such wonderful access to elevated mounting
>options? I'd use the trees to raise the vertical if I could.

Ground loss ... matching ... those would be two reasons to consider ...
>Four radials is about the most needed for verticals when mounted above the
>ground.

Define "about the most needed"?
At what height above ground? 0.1w ? 0.5w ? 1.0w ? It makes a difference.
>Shoot, why not try just a single counterpoise?

Resonant ... yes ... effective ?????????
>Bet it would be adequate.

Define "adequate" ? My dummy load is adequate for certain purposes ...
There IS a reason for having extensive ground planes under vertical
antennas ... (think PERFORMANCE) or being next to salt water ... :-)
73 Billy AA4NU