Constructors Corner.
The original microphone had a transformer inside and used the same element as the speaker and miccrophone, switching the transformer in and out of circuit with the PTT switch.
| 5 Pin locking ring | Pin | Signal |
|---|---|---|
| 1 | Mic Audio |
| 2 | Common Ground | |
| 3 | RX (connect to Pin 2 for RX) | |
| 4 | PTT (connect to Pin 2 for TX) | |
| 5 | Speaker |