[TowerTalk] Prosistel rotor connectors source in USA

[Michael Tope]

I don't know about the 12V motor in the PST61, but back in 2021 Jay WX0B 
gave me the following info on the current draw for the 24V motor in PST-71D:

    /"The motor is a 24 VDC motor and 3 amps surge start current
    depending on load, but running is less than an amp./
    /The Prosistel controller has Transformer taps that you can go to
    say 30 V tap vs 24 V and deal with the line loss."/


These numbers are at least somewhat consistent with the 4 to 13 ohm 
motor winding resistance range spec in the Prosistel manual.

And, yes, it would be nice if the manufacturer's provided more specific 
guidance. It could be as simple as providing a maximum loop resistance 
for the wires providing power to the motor.

73, Mike W4EF...............

On 3/24/2025 1:51 PM, john at kk9a.com wrote:
> I believe 0.75 mm2 wire is US equivalent of 18 AWG which is pretty small for
> a motor that could be hundreds of feet away.  Definitely the length matters
> and the manual should have specified that.   It would be nice if rotator
> manufactures supplied the voltage and current specs so anyone with a little
> knowledge of Ohm's law could figure out the appropriate wire size to use.
> House wiring has codes on allowable voltage drop, I believe it is 5%, and
> wires need to be sized accordingly.
>
> John KK9A
>
> Jorge Diez (CX6VM-CW5W) wrote:
>
> Manual says to use no less than 0.75 mm2 wires. Don't talk about the length
>
>
> _______________________________________________
>
>
>
> _______________________________________________
> TowerTalk mailing list
> TowerTalk at contesting.com
> http://lists.contesting.com/mailman/listinfo/towertalk