Check the schematic, the indicator circuit is pretty basic using a 500 ohm
remote sensing pot. and a milli-ampmeter. I suspect that you induced enough
RF it the control cable (acts as an antenna) and that RF is rectified by the
meter circuit and causes the wild variation. Further you may have caused a
diode in the DC meter supply circuit to fail and that is the problem when not
Solution, find the bad component in the control unit, and then add some RF
chokes in the control cable. Wrap about 5 turns of cable through a ferrite
toroid, or some Ferrite Beads on the individual control cable wires at the
control box. A couple of .01's to chassis may solve the problem also.
Fellow Tower Talkers:
I have A Yaesu G-450XL Antenna Rotor. I had no problems with this unit
until recently. After adding an Ameritron AL-811H amplifier, while going
into a 160 Inverted L with 60 radials, the rotor started going crazy. The
overlap light is now permanently on red and the indicator starts spinning
when the amp is transmitting. The rotor still turns when the switches are
depressed, but the indicator does not turn indicating direction. Any help
would be greatly appreciated, especially those who repair Yaesu Rotors.
Thanks in advance!
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