Thanks, Rick.
My particular circumstances limit me to a small triangle of ground in the
corner of a field and the FCP suits that very well. It would be interesting to
know how the FCP compares to something well known, like a broadcast station
ground.
I like the idea of the spiral counterpoise: I experimented with a one turn
counterpoise in EZNEC
at 3 m above ground level. It looked workable but too big for my space, so, I
could make that into a spiral and perhaps not be too concerned about symmetry.
However, looking to Guy's idea of stacking the wires vertically so they shade
the ground underneath might be worth a try. Compressing things always seems to
limit bandwidth, so, that's something to be wary of.
David G3UNA
> On 09 January 2022 at 16:22 "Richard (Rick) Karlquist"
> <richard@karlquist.com> wrote:
>
>
>
> On 1/9/2022 4:51 AM, CUTTER DAVID via Topband wrote:
> > Hi Rob
> >
> > I see copper prices have doubled in the last year.
> >
> > My intention is to compare and contrast the cost and performance of short
> > verticals over a large field of ground radials v the very modest amount of
> > wire required for the FCP. In Guy's article
> >
>
> This is a false dichotomy between FCP and a broadcast station ground
> screen. The best use of wire is to have a small number of elevated
> tuned radials with proper RF choking. As shown by N6LF, you can do well
> with just 8 radials, about 100 feet long each. On 160 meters, they
> should be 20 feet high for optimum performance. BTW, cheap aluminum
> electric fence wire works perfectly for elevated radials Also consider
> N6BT's single spiral radial configuration as an alternative to FCP.
>
> Rick N6RK
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