[TowerTalk] Prosistel rotor connectors source in USA

[Jeff DePolo]

> > Prosistel recommends Cat7E for the motor conductors?  Cat7E uses 23 or
22
> > awg copper wires.  I am not familiar with Prosistel rotators and I don't
> > know the motor's voltage or amperage.  22awg wire has 1.6 ohms
resistance
> > per 100 feet so the voltage drop at the motor could be significant.

I think Prosistel recommends shielded Cat7 because they use an encoder for
position tracking; the controller could be susceptible to RFI on those
conductors, thus the requirement for shielding and twist?  As far as power
requirements, I don't know, but if you can get away with it, I'd use
something like Essex BBDG6A which is also 23 gauge, is flooded (icky-pic),
has a copper armor shield that you can put ground kits on, and has a very
tough jacket.  We use it all the time on towers for Ethernet to microwave
radios.  It's good stuff, and not all that expensive in full-reel
quantities.

> Mass market options for multi-conductor cable are pretty limited. I used
> two runs of Romex for most of the 350 ft run to the top of my tower for
> a Yaesu rotator.

For Yaesu we use TC-ER tray cable.  Wire And Cable Your Way has good
selection and will cut to any length.  For quick and dirty temporary use,
sprinkler wire...

					--- Jeff WN3A

---------------------------------
Jeff DePolo, Senior Engineer
Broadcast Sciences LLC
Valley Forge, Pennsylvania
610.917.3000