In a message dated 10/20/02 9:15:40 AM Pacific Daylight Time,
n4zr@contesting.com writes:
> I've noticed that the portable news-gathering vans seem to use an
> alternative sort of rotation loop for their antenna masts. It looks like
> they wrap 6-7 turns of coax around the mast, with the top fixed at the
> antenna and bottom end fixed to the truck body, such that when they rotate
> 360 degrees the coil just loosens or tightens a relatively small
> amount. That seems like a mechanically superior approach. Anyone tried
it
> in ham installations?
Yep. It works FB and eliminates potential hang-ups with a traditional
rotation loop.
> Would it work better with the stiffer cables?
>
Sure - there is less actual feedline movement so is pretty benign to
stiff cables and those with solid center conductors.
Cheers,
Steve K7LXC
TOWER TECH -
Professional tower services for commercial and amateur
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