[NJARC] Information needed

[antqradio at juno.com]

I have a Courier 1M CB radio in for repair.  I need the microphone pin
out so that I can modify an available microphone.
The 1M is listed in Sams CB-8, which I don't have.  Never thought I would
ever work on a early 1960s CB!
It uses the old style four pin connector but receive audio is routed
through two of the four pins.  The other two are mic audio and ground. 
Evidently, this allows transmit / receive switching without a relay.
Regards,
Jim