[TowerTalk] hexagonal beams and height above ground

[Jim Hoge <knowkode@verizon.net>]

Has anyone modeled hexagonal beams with regard to height above ground? I am 
very leery of the statements that they perform better when lower to the ground, 
specifically that on 20m, a height of 40 feet is best. I think Gotham antenna 
when advertising goes against the norm. I have seen a few elevation plots but 
wonder what is at work to make this fly in the face of convention.

tnx,
Jim W5QM
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