Highfields Amateur Radio Club
Constructors Corner.

Alan / Midland Microphone Pin Outs.
For: 9001.

5 Pin locking ring	Pin	Signal
	1	Mic Audio
	2	Common Ground
	3	PTT (connect to Pin 2 for TX)
	4	Up (connect to Pin 2 for Up)
	5	Down (connect to Pin 2 for Down)