Help me here, but if grnd screen has no effect on HF Yagis, then why is
height above gnd important to Yagis ? de K4VUD
On Mon, 26 May 1997, T. A. Russell wrote:
> Two things come to mind:
>
> First, a ground screen does nothing for HF Yagi's (for two reasons)
>
> a - A Yagi has a NULL straight up and straight down
>
> b - The GROUND REFLECTION point is hundreds of feet from the
> tower
>
> Second, a ground screen WILL benefit any VERTICALLY polarized antenna on
> or around the tower, but may rust out in a few years. My galvanized
> electric
> fence wire radials were heavily rusted in 3 to 5 years. The ground
> reflection
> from your quarter wave slopers is likely to be beyond the range of your
> screen.
> A shunt fed tower for 160M would benefit from the ground screen.
>
> de Tom N4KG
>
>
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