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Old November 25th 03, 05:45 AM
Jack Painter
 
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Well, maybe the late hour contributed to MY mix up of Zenith (overhead) and
Azimuth, horizon, etc. Thanks for the nice piece anyway Richard!

"Jack Painter" wrote in message
news:TSBwb.14594$yM6.11303@lakeread06...
Richard wrote:
In my experience, the vertical angle of maximum radiation, in general,
decreases with antenna height above the earth, when the height of the
antenna in is not over 5/8 wavelength.


That's a good paraphrase of the standard writings on the subject, but..

Richard also wrote:
A 1/2-wave horizontal dipole erected 1/4-wave over good earth has its
maximum radiation toward the zenith. The same antenna elevated to
1/2-wave above the earth has a take-off angle near 30 degrees above the
horizon.


Please explain this (apparent) contradiction? I expended significant

effort
to get a dipole 1/2 wavelength above ground, and did so specifically for
long-haul communications. I may have missed any theory about the 1/4
wavelength being the optimal height, as I was always told (as I read) that
1/2 wavelength height was considered optimal for a number of reasons, not
the least of which was the best take-off angle.

Thanks,

Jack Painter
NF05CM
Oceana Radio