[TowerTalk] Prosistel rotor connectors source in USA

[Jon Zaimes, AA1K]

We just wired up a Prosistel PST71D Pro model with 300' of cable using Cat 7 cable. Two extra wires doubled up are still less than the size the manual suggests, so I asked Prosistel and they said it would work. The Pro model uses a hall effect sensor instead of a pot for heading indication and needs 6 conductors.  
When we tested it worked just fine. Not installed on the tower yet.
73/Jon

Jon P. Zaimes, AA1K
Tower climber for hire
Felton, Delaware
http://www.aa1k.us/
 

Reviews of AA1K tower work on eham website: http://www.eham.net/reviews/detail/12922

Hug your favorite tower every day, and always stay connected to it. 

    On Sunday, March 23, 2025 at 02:10:52 PM EDT, Jeff DePolo <jd0 at broadsci.com> wrote:   

 > > 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
  





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