Thanks for all of the comments regarding taping of traps. The Hy-gain info
makes it clear that the change in frequency as a percentage of the
operating frequency is insignificant with tape added to the trap covers. I
would venture a guess that the mechanical pressure of the tape, the trap
cover or the lack of trap cover contributes to a dimension change that
affects capacitance in a very minor way. I would also guess that the same
order of magnitude change to the traps can occur while the elements flap in
the breeze. Practically speaking, I have my answer. The trap covers will be
taped. Now, would trap covers of some other material - UV resistant - be a
better choice for the antenna manufacturers? Anyone out there working on a
thesis for an advanced degree in materials application?
And to whomever it was that questioned why I would question Hy-gain or any
other manufacturer's recommendations, all I can say is that: It's in my
nature.
73, Steve WB6RSE
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