Good question, Stan. I've wondered the same thing. I have a 64' self-standing tower with a 3 el Steppir on it (insulated elements) and a 40m linear loaded dipole (also insulated) on top of that. I've worried that any high voltage on the ends of the boom might be harmful to the drive motors in the dir/ref boxes. So I've chickened out and avoided loading the tower on 160.
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