MFJ-1272B
Instruction Manual
6
Through Connections
Table 5 below shows where you would place a jumper, depending on the
microphone pin functions that are not to be switched by the MFJ-1272B.
Microphone pins designated, +V, UP and DOWN, are radio functions that are not
needed by the TNC, but are needed for normal microphone operations. For
example, if on a Kenwood microphone pin 3 is designated as being UP, which
would be for increasing your frequency readout on the radio, then you would place
a jumper on position, R3E-M3A on header HD2.
Radio MIC Pin
MFJ-1272B
Header
Place a jumper on:
1
HD2
R1E--M1A
2
HD2
R2E--M2A
3
HD2
R3E--M3A
4
HD2
R4E--M4A
5
HD2
R5E--M5A
6
HD2
R6E--M6A
7
HD2
R7E--M7A
8
HD2
R8E--M8A
Table 5
Mic Audio Connections
Table 6 below shows where you place a jumper, depending on what microphone
pin is designated MICROPHONE AUDIO. For example, if MICROPHONE AUDIO
is designated as being pin 5 on a Kenwood microphone, then you would place a
jumper on position, M5B in the AUDIO IN section of header HD2.
Radio MIC Pin
MFJ-1272B
Header
Place a jumper on:
1
HD2
AUDIO IN--M1B
2
HD2
AUDIO IN--M2B
3
HD2
AUDIO IN--M3B
4
HD2
AUDIO IN--M4B
5
HD2
AUDIO IN--M5B
6
HD2
AUDIO IN--M6B
7
HD2
AUDIO IN--M7B
8
HD2
AUDIO IN--M8B
Table 6
