[Azden] Mics

[W0OXJ]

Anyone have schematics for PCM-499 and PCM-463A mics?Are they interchangable
on PCS-5000 and PCS-7500 radios?It appears they are as the pinouts are the
same.My 499 is acting up and I don't need DTMF so was considering using the
463A.    Would like to understand the mics a little better so schematics
would help.

Anyone adapt other mics for Azdens?Do they have pre-amps built in?

Any help is appreciated.

73,
Bob
W0OXJ