I sense there's still a failure to communicate.

If Dale means by "V/U" VHF and UHF, ground wave isn't a viable means of
propagation anyway. The attenuation of ground waves increases with
frequency, to the point that they're virtually useless at VHF and above.
So at those frequencies, I'd think the polarization choice for short
range communication would be based on how it affects attenuation,
multipath, and QRM. Given those criteria, horizontal might well have an
advantage for short range communication, in some locations at least. And
it's long been favored for long range VHF/UHF communication.

Roy Lewallen, W7EL

Bill Turner wrote:
On Sun, 05 Sep 2004 00:02:26 GMT, "Dale Parfitt"
wrote:


This will be sad news to all the V/U weak signal ops who have consistantly
covered long distances using horizontal polarity.


__________________________________________________ _______

This fellow was planning to put his antenna on the roof of a car.
Presumably he is *not* DXing.

I was therefore speaking of groundwave coverage, not any kind of skip,
and what I stated holds true; for local groundwave, vertical is best.

DXers, on the other hand, use horizontal precisely because the local
groundwave coverage is poor, thereby reducing local QRM but having
little or no effect on skip signals.

--
Bill, W6WRT
QSLs via LoTW

Roy Lewallen wrote:

I sense there's still a failure to communicate.

If Dale means by "V/U" VHF and UHF, ground wave isn't a viable means of
propagation anyway.

Maybe you could revise your definition of "ground wave" to
agree with the IEEE? The IEEE dictionary says the "ground wave"
is defined to be what would be left if we took away the ionosphere.
It says the ground wave *includes* a component of the space wave.
--
73, Cecil http://www.qsl.net/w5dxp


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"Roy Lewallen" wrote in message
...
I sense there's still a failure to communicate.

If Dale means by "V/U" VHF and UHF, ground wave isn't a viable means of
propagation anyway. The attenuation of ground waves increases with
frequency, to the point that they're virtually useless at VHF and above.
So at those frequencies, I'd think the polarization choice for short
range communication would be based on how it affects attenuation,
multipath, and QRM. Given those criteria, horizontal might well have an
advantage for short range communication, in some locations at least. And
it's long been favored for long range VHF/UHF communication.


Ground wave is a broad term, but it is how VHF and UHF usually propagate.
Ground wave is a general term for several means of propagation. Surface
wave is what you are really talking about when you mention Ground wave.
Space wave, atmosphere ducts and other means near the earth are all part of
the Ground wave term. The Sky wave is usually the broad term for
reflections off the ionosphere and other reflected modes from high above the
surface.

For vertical or horizontal there is very little differance in which is used
at VHF and above. Noise is usually vertical polorised so horizontal for the
RF is usually used . Vertical is used so the simple vertical moble whips
could be used for all around coverage.