[TowerTalk] Vertical dipole other choices?
Richard (Rick) Karlquist
richard at karlquist.com
Tue Oct 27 16:28:00 EDT 2020
On 10/27/2020 11:56 AM, Rob Atkinson wrote:
> Unrelated: In the Nov. QST in the Doctor Is In column, the author
> Joel Hallas W1ZR, states that a 180 degree base fed vertical monopole
> needs no ground system, only "short counterpoise rods, which look like
> radials but are usually only 4-6 feet long, to provide a connection
> point for the shield of the coax." That is utterly incorrect. It is
> voltage fed, but it is still a monopole, and is still unbalanced and
> induces currents in the earth. It needs a ground system.
>
> 73
> Rob
> K5UJ
I built 1/4 wave and 1/2 wave verticals for 20 meters.
The 1/4 one one had 32 1/4 wave radials. The 1/2 wave
one had only the shield of the feedline as a counterpoise.
I did an A/B test using received signals off the air.
I could not discern any consistent advantage of one
versus the other. YMMV.
Rick N6RK
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