Knowledge Base
Answers to Your Questions about Radio and Wireless Voice Communications

Icom Land Radio 2 Pin Wiring Data

01 November 2015

Wildtalk Earpieces with this plug end with the part number -IS

This wiring plan is for Icom Land Based radios, non submersible models only. It does not apply to other Icom radios.


2.5mm Pin

Mic Gnd.
Common Ground for 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).

5Volts via a 470R resistor is available here (on some radios.)


3.5mm Pin

Speaker Out

Spk Gnd
Speaker Ground (not necessarily commoned with Mic Gnd)

Porgramming wire for programming  the radio.

Radio Models

Most Icom LMR (Land Mobile radios).

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