[TowerTalk] FW: Yaesu 2500 rotator control line

[Jim Brown]

On 8/25/2017 7:26 PM, steve sala wrote:
> What do you recommend I use to finish the project?
It's all Ohm's Law. Unfortunately, Yaesu doesn't tell you the maximum 
resistance, so you must compute it from what they tell you about how 
long the cable can be and what the wire size is that they're talking 
about. I don't know the 2500, but their smaller rotators use two 
conductors to drive the motor and three conductors to a pot that reads 
direction. Only the pair used for the motor are sensitive to resistance. 
So the simple solution is to use big copper for that pair and smaller 
cable for the three wires that connect to the pot.

My cable run is quite similar to yours. I ran two 4-wire #14 power cable 
(red, black, white, bare for ground) from the shack to the tower base, 
then smaller conductors up the tower. I found some special control cable 
at a surplus store with several conductors in the range of #18 and 
several more smaller conductors, and used that on the tower. Works fine. 
Don't recall details, that was 8-9 years ago. :)

73, Jim K9YC