[TowerTalk] K8UR wire 4-SQR characteristics vs 1/4 vertical array design from N0AH

[Ken Hirschberg]

Steve, and all -
They are not immune, and they, too, must have their near-field protected from
lossy earth with a ground screen.  Without the screen, they may not be dumping
much into the dummy load, but they would be dumping plenty into heating up the
soil!  Exceptions: when the dipoles are high enough so that the near-field is
not disturbed, or when they are over a conductor, e.g. salt water.
73, Ken  K6HPX

Steve Maki wrote:

> Pete Smith <n4zr@contesting.com> wrote:
>
> RE: half wave vertical dipole array
>
> >Modeling shows no need for radials, and good directivity extends all the
> >way from 3.5 to 3.85 mHz.  Advantages are simplicity and no dumped power at
> >all, though you do have to homebrew the switchbox.
>
> There is a section in ON4UN's book about the need for an extensive
> ground system with half-wave verticals, contrary to "popular myth".
>
> I assume he is talking of base-fed half waves, but wonder why center
> fed half waves would be immune from this requirement?
>
> --
> Steve K8LX
>
> --
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