MFJ -1272B TNC User Manual
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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 TNC and Multimodes
MFJ-1272B All MFJ TNCs, TAPR TNC II clones, and PK-
12/96/900
MFJ-1272BX PK-232
MFJ-1272BYV KAM® VHF port, KPC-2, KPC-3
MFJ-1272BYH KAM HF port
MFJ-1272BZ PK-88
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.
KAM is a registered trademark of Kantronics Company, Inc.