The following schematic shows the MC-44 Multi Function Microphone Wiring Diagram. MC-44 Multi Function Microphone enables you to talk and listen without having to move the radio. Just clip the mic where convenient and use it to listen and transmit. It has 8 pin RJ connector. Inside the microphone, there is a felt pad lightly glued to the microphone element housing. Removing the pad will increase the audio level.
There are several ways to increase the transmit audio level when using an MC-44DM. If you are using a single band transceiver such as the TM-231A, you can turn up the deviation control inside the transceiver. Do not turn up the deviation controls in dual banders such as the TM-731A because the audio will distort during repeater cross band operations.