IC02AT.12

ICOM O2AT INTERFACE TO MFJ 1270B TNC 2 PACKET RADIO

SPEAKER JACK

1.  CONNECT THE SHIELD (PIN 2 - GROUND, AUDIO AND PTT COMMON) TO THE
    LONG OR OUTSIDE POST OF THE SPEAKER JACK.

2.  CONNECT THE BLACK WIRE (PIN 4 - RECEIVE AUDIO) TO THE SHORT OR
    CENTER POST OF THE SPEAKER JACK.


MICROPHONE JACK

1.  CONNECT THE YELLOW WIRE (PIN 1 - MICROPHONE AUDIO) TO ONE SIDE
    OF A .05 MICROFARAD DISK CAPACITOR (RADIO SHACK CAT. NO. 272-134)

    AND THE OTHER SIDE OF THE CAPACITOR TO THE SHORT OR CENTER POST
    OF THE MICROPHONE JACK.

2.  CONNECT THE WHITE WIRE (PIN 3 - PUSH-TO-TALK) TO ONE SIDE OF A
    1/4 WATT, 2200 OHM RESISTOR (RADIO SHACK CAT. NO. 271-1325) AND

    THE OTHER END OF THE RESISTOR TO THE SHORT OR CENTER POST OF THE
    MICROPHONE JACK.

3.  CONNECT THE SHIELD (PIN 2 - GROUND, AUDIO AND PTT COMMON) TO THE
    LONG OR OUTSIDE POST OF THE MICROPHONE JACK.

4.  ISOLATE THE RED WIRE (PIN 5 - SQUELCH) WITH BLACK TAPE AS IT IS
    NOT USED.