Downtilting UHF antennas is a common practice in cellular but is the concept
practical on topband with a Pennant? I was converting a Flag to a point fed
Pennant yesterday - installed on a hill with the high side being the
termination side and the lower side the feed - and direction of interest.
After I
rigged up the new configuration it was twilight and I noticed performance was
far poorer - except on local sigs which were still quite good. Generally the
locals are worse on the Flag/Pennants. This AM I went out and saw that the
point of the Pennant was considerably pointing high and the long pennant
triangle quite distorted. I fixed it up but the point now faces a bit
downward
from the level horizontal plane. Performance appears back to normal and I have
a
lot less local crud noise.
The problem is these observations are without any controls and thus
anecdotal - even the crud noise may just be lower today.. But my Q is given
the
Pennant (and Flags) aren't ground dependent, is it possible to lower the take
of
angle by downtilting?
73 Pete, W2PM
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