Ed:

Dave is correct in that selecting the correct antenna depends on identifying
the problem first. For example, if the actual problem is receiver front end
overload, then a higher gain antenna will make it worse instead of better.
If the problem is reflections (and sorry, Dave, LOS is not necessarily
reflection free, I used to have to look at the local TV stations between two
elevated water towers, LOS with two ghosts), then antenna pattern, rather
than gain alone will matter. If you want an engineering evaluation, then a
whole bunch of facts are needed, and the two facts which are needed most
will be hard to come by: 1. A spectrum analyzer shot of what appears at the
receiver end of your feedline, plus 2. A audio frequency phase analysis of
the detected signal to determine main and delayed content.

--
Crazy George
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