The Radio Information Board

Looking for the Relm Micro-Com SM series radio mic pinout.

Trying to help a vol fire guy with a bad mic - I'd rather throw the radio away where it belongs (in the dumpster)
but I guess that's not an option......

I think I have it close, but I would rather verify with someone who knows for sure......

The microphone pin outs for the older SM-series mobiles are as follows:

Pin 1 = RX earpiece audio (not connected)
Pin 2 = Ground
Pin 3 = PTT (+5vdc in RX, 0vdc in TX)
Pin 4 = Microphone Audio (low impedance)
Pin 5 = Hang up (+5vdc off hook, 0vdc on hook)
Pin 6 = Switched +13vdc (Not connected)

I hope that helps.

Regards,

Bill

That's what I was looking for...

Many thanks!