Icom Marine M1 Euro, M71 and M73
01 November 2015
This wiring plan is for Icom Marine radios with the unique Icom connector.
Icom Marine M1 Euro, M71 and M73
Gnd.
Common Ground for Speaker and Mic
Mic & PTT
Electret Mics only connected here. When Mic is connected via PTT to Ground the radio transmits. (Mic and PTT are in series).
Mic may need to be bypassed with 3K3 resistor to function correctly.
Clone
When programming this is connected to TTl level programmer.
When connecting an audio accessory this pin is grounded to tell the radio to route audio to the accessory socket.
Spk
Speaker Out. 8ohms or higher.
Icom Marine M1 Euro, M71 and M73
We can only supply this cable as part of a genuine Icom speaker Mic
