Wiring diagram for mic?

In article ,
Gary G wrote:

Would anyone be kind enough to point me to a wiring
diagram for a general aviation radio?

I need to know the pinout configurations and voltage
for the mic connection.

Thank you and regards in advace!

Gary

There is VERY low voltage involved -- #22 AWG (shielded) wire will
suffice.

There are three hookups to the jack: Mike Key, Mike Audio and Mike Ring.

Ring goes to Ground

Key goes to a switch, which grounds the key circuit. This activates the
transmit relay in the radio.

Mike Audio passes straight through to the radio audio circuit and
carries the voice. This wire should be shielded, to reduce EM
interference.

IIRC, the audio is the tip of the jack; the key is the next position on
the jack. Ground is the outer (long) part of the jack. Check with a
circuit tester.