> 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? Would it work better with the stiffer cables?
Yes, it's known trick to use semi rigid cables like cellflex in rotable
systems.
73,
Mauri I4JMY
> 73, Pete N4ZR
> Sometimes a tower is just a tower
|