[OKDXA] Mini Tribanders at low heights
Nelson Derks
ac5up at windstream.net
Mon Sep 21 13:48:23 EDT 2009
John Geiger wrote:
> I know that is below the real minimium height to get such an antenna to play on 20. So here is my question-is it really worth the expense and effort to put a mini antenna at that height?
Optimum height is generally considered half a wavelength above RF ground
(which in some cases is slightly below the Bermuda grass) and that's 35'
on 20 Meters. But... There are plenty of OM's making Q's on 40 and 80
where the optimum height thing ain't happenin' for them, either.
Assuming the G5RV is also at 25' the advantages of a mini beam would be
improved forward gain along with the possibility of reducing noise
coming off the back side. The noise reduction concept is more often the
difference between Q / No Q than forward gain so I'd say there is an
advantage.
Can't say if that would be worth it to you, but it wouldn't be a
complete waste.
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