I have a CDE rotor control box, the predecessor of the Ham IV. One day, the meter needle started randomly jumping all over the place, whether turning the antenna or not ! It just moves randomly (when it moves) but the antenna accurately follows my rotate left or rotate right actions. I believe this would indicate a problem in the box, but the circuitry is very simple, and the antenna turns as it should. I just have to go outside to verify the direction, lol. Has someone seen this problem before? Is the wacky reading coming from the control box, or the potentiometer in the rotor itself ? Ideas?