Anyone have handy the schematic of a TM-441A transceiver? I am wondering about the connection to pin 6 of the microphone connector. This pin should have RX audio @ about 100mV. My question. Is the pin d-c isolated; i.e. is it connected via a series capacitor or is it direct-connected to the transceiver's audio circuit. Your help and counsel will be most appreciated. 73 <> Carl