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Old May 31st 06, 02:43 PM posted to rec.radio.amateur.antenna
chuck
 
Posts: n/a
Default RF grounding methods for sailboats: A Summary

Jon Kåre Hellan wrote:
chuck writes:

3) Radials


5) OCF dipole w/horizontal component along deck


Is that where it stands, folks?


Beside the name, is there any difference between an OCF dipole and a
single radial?

73
LA4RT Jon


We don't seem to have widely used, descriptive
names for these configurations. Cecil is correct,
and perhaps the OCF referred to should be called
an OCF "L". The vertical radiator with a single,
elevated, horizontal, resonant "radial" perhaps
should be called an "L" dipole.

On inspection, either antenna, on a boat with a
tuner at the feedpoint, could be mistaken for the
other. You could tell the difference only by
observing how the antenna is operated. If the
antenna is operated only on those frequencies for
which the horizontal element is an odd multiple of
a 1/4 wavelength, we would call the antenna an "L"
dipole (or whatever).

If that same antenna were operated not only on
those frequencies, but on all others (HF spectrum)
as well, we would call it an OCF "L".

But if, on inspection, the antenna has multiple
resonant radials, that would unambiguously
differentiate it from the OCF.

Whenever the two antennas are physically
identical, they will obviously operate identically.

Make sense, Jon? Sorry for the confusion.

73,

Chuck
NT3G



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