MFJ-1272B TNC/Microphone Switch
Introduction
Thank you for purchasing the MFJ-1272B TNC/MIC Switch. This switch is
designed to allow simultaneous connection of both your microphone and
your TNC to the radio.
The MFJ-1272B microphone switches were designed to be used with any
radio that has a standard, round, 8-pin microphone connector. Because
many TNCs have different connectors, MFJ offers 5 models:
MFJ Model Number
MFJ-1272B
12/96/900
MFJ-1272BX
MFJ-1272BYV
MFJ-1272BYH
MFJ-1272BZ
For circuit board revisions, refer to page 11.
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.
TNC and Multimodes
All MFJ TNCs, TAPR TNC II clones, and PK-
PK-232
KAM® VHF port, KPC-2, KPC-3
KAM HF port
PK-88
KAM is a registered trademark of Kantronics Company, Inc.
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