On 10/14/2017 9:44 AM, Filipe Lopes wrote:
My question is regarding the rotor, what kind of cable or how should one
rotate the rotor at such distance? I guess the voltage drop is quite high,
meaning the rotor will turn very very slowly or even not turn at all.
Ohm's Law is your friend, but Yaesu's tech data is not. :) They don't
give you a maximum permitted resistance so you must compute it. I have a
350 ft run on my Yaesu rotator. I had to figure conductor resistance for
their maximum recommended cable length based on its conductor size, then
do Ohm's Law with a wire table to know what wire size to use. One
important piece of information -- study the schematic of whatever
rototor you are using. With the Yaesu, two conductors run the motor, the
other three sense the position of a simple potentiometer that tells
direction. Only the motor pair is sensitive to resistance. I ended up
using #14 "house wire" for the motor pair and #18 for the potentiometer.
73, Jim K9YC
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