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The connector in the back is a 6 pin molex, all plastic. The ground loop through the counter could be the issue. Got fed up last night and put a 9v battery tray in the back with a power switch on the front. Havent tried it yet. This counter was intended to be just for this 142. In the middle of my chopping holes in the counter case, a buddy talked me in to buying a President Washington from him. So I guess it worked out as I should be able to use it for both radios this way. I do still have some voltages that are out of spec, mainly on the ta7222. Still havent figured out why it has 6.6v on pin 2.