CTC-10 adjustment lug?

[Chad Hauris]

I think many of these old remote transmitters used a mercury battery that was 4.5 volts. Usually there is a label in the battery compartment telling what type to use so you may try to verify what voltage was needed based on battery type. Also, double check the polarity you have hooked up from the wall adapter. As I remember, the mercury battery had the negative terminal at the small tip so it went in backwards from a regular alkaline or carbon zinc cell.

Try holding the remote transmitter right up to the microphone on the set and see if you get some action. Make sure the condensor microphone "phantom power" (270 volts I believe) is present at the mic. Check all of the DC voltages through the signal path beginning at the microphone.