MFJ MFJ-1272M, Instruction Manual, Page: 1 / 20

MFJ-1272M TNC/MICROPHONE SWITCH
Introduction
Thank you for purchasing the MFJ-1272M TNC/MIC Switch.
The MFJ-1272M is designed to allow simultaneous
connection of both your microphone and your TNC to the
radio.
The MFJ-1272M microphone switches were designed to be
used with any radio that has an 8-pin, RJ-45 modular
microphone connector. Because many TNCs have different
connectors, MFJ offers 5 models:
MFJ Model# TNC and Multimodes
MFJ-1272M All MFJ TNCs, TAPR TNC-2 clones, and PK-
12/96/900
MFJ-1272MX PK-232
MFJ-1272MYV KAM® VHF port, KPC-9612, KPC-2, KPC-3
MFJ-1272MYH KAM® HF port
MFJ-1272MZ PK-88
CAUTION
Always check your radio's owner's manual to see if
there is a voltage on one of the pins of the microphone
before hooking up the microphone switch. You could
damage your radio by connecting the PTT line to a
voltage source. Do not connect any pin labeled as a
voltage source to PTT!!!!!
Warning MFJ Enterprises, Inc. is not responsible for
damaged radios or associated equipment. It is
your responsibility to make sure your
connections will not damage the radio.