I think you guys are thinking of two different motor drives. The US Tower
( and some Tristao and Tri-EX) MDP-750 is a continous cable for pull up
and pull down and wraps around a multi grooved pulley system. The MDPL-1000
is a drum with two seperate calble, one for pull up and the other for pull
dowm.
I have seen the MDP-750 cable slip if it too loose or too slippery.
Skip, KJ6Y
_Communications Service Co_ (http://www.communicationsserviceco.com/)
22712 Califa St
Woodland Hills, CA 91367
818-887-3569
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