I know this subject comes up regularly, but maybe my exact symptoms will
ring a bell for a good startpoint in troubleshooting my G-800SA problem. It
has
about 200 feet of cable between the controller and rotor. When put up new,
it set up fine and the "full scale adjustment" was perfect throughout full
rotation. Six months later, just by chance, I noticed that it was way off
only
at some headings. Everything is fine mechanically--no slipping, no binding,
smooth rotation. But, in recalibrating the "full scale adjustment", I found
that with full CCW on the adjustment pot, I was still 10 degrees short of
lining up at the desired 180deg point in the process--ran out of pot
adjustment.
Starting at full left on the rotor, ROTATING to full right, the following
are the readings:
Cntlr Actual Hdg Diff
180 180 0 (full left)
270 265 -5
360 340 -20
030 360 -20
120 120 0
170 180 +10
210 245 +35
225 270 +45 (full 450deg rotation to right)
I am guessing I took a power spike/lightning surge on this hilltop QTH. I
just finished tearing down and fixing an internal mechanical problem on a
G-450XL rotor, so I am comfortable tearing into this unit. MY QUESTION:
Anyone
know the "likely" problem with readings such as above?. Should I start with
the control unit, or the rotor itself, or something else?
Thanks, Steve, W5KI
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