Martin. I have a 2 el wire beam on a 36 ft boom. It is "kick a%&". What I
did to solve that problem is dual drive the elements - 180 deg out of phase.
Then just switch matching stubs at the bottom of the tower. It is only a
few tenths of a dB lower in gain than an optimized 2 el Ref - DE
arrangement. You can do all the tuning, switching at the feed point
combiner at the bottom of the tower, and you have the advantage that it is
bi-directional. From W1, that means it's a USA and EU antenna all at the
same time.
73
Ed N1UR
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