?Yes, TRRS connector that will use the earphones and in-line mic.? Based on my testing, I've found the following connections. T - Right earphone R1 - Left Earphone R2 - Common S - Mic
These cell phone mic's tend to be electret/condenser/capacitor type so I'm connecting to the TX-500 mic input with bias voltage included.? I've tested the circuit design on my TX-500 and it works perfectly.
The PTT button is included in the middle of this circuit board although I've considered using instead an external button with a TS jack on my board.
Then there is a pigtail cable (you can suggest the length you want) with the GX12-6 connector.
Years ago I was a factory certified PCB repair tech so my soldering skills are considered expert level.? I started playing with circuits back when TTL was a new thing.
If someone with a 3d printer wants to design a case, let me know.
