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Audio Out Connections
Table 3 below shows where you would place a jumper, depending on what
microphone pin is designated MIC. The microphone designated MIC, is the pin
that the transmit audio from the TNC comes into the radio. For example, if MIC is
designated as being pin 1 on a Kenwood microphone, then you would place a
jumper on position R1C in the AUDIO OUT section of header HD1.
Radio MIC
MFJ-1272M
Pin
1
2
3
4
5
6
7
8
Ground Connections
Table 4 below shows where you would place a jumper depending on what
microphone pin is designated GROUND. For example, if GROUND is designated
as being pin 7 on a Kenwood microphone, then you would place a jumper on
position R7D in the GROUND section of header HD2.
Radio MIC
MFJ-1272M
Pin
1
2
3
4
5
6
7
8
Always use the MIC pin designated as GROUND (not mic ground). The use of
MIC GROUND could result in audio "hum" in the system.
Jumper Placement for
Header
Kenwood & Yaesu
HD1
AUDIO OUT--R1C
HD1
AUDIO OUT--R2C
HD1
AUDIO OUT--R3C
HD1
AUDIO OUT--R4C
HD1
AUDIO OUT--R5C
HD1
AUDIO OUT--R6C
HD1
AUDIO OUT--R7C
HD1
AUDIO OUT--R8C
Jumper Placement for
Header
Kenwood & Yaesu
HD2
GROUND--R1D
HD2
GROUND--R2D
HD2
GROUND--R3D
HD2
GROUND--R4D
HD2
GROUND--R5D
HD2
GROUND--R6D
HD2
GROUND--R7D
HD2
GROUND--R8D
MFJ-1272M Instruction Manual
Table 3
Tabel 4
Jumper Placement for Icom
& Radio Shack
AUDIO OUT--R8C
AUDIO OUT--R7C
AUDIO OUT--R6C
AUDIO OUT--R5C
AUDIO OUT--R4C
AUDIO OUT--R3C
AUDIO OUT--R2C
AUDIO OUT--R1C
Jumper Placement for Icom
& Radio Shack
GROUND--R8D
GROUND--R7D
GROUND--R6D
GROUND--R5D
GROUND--R4D
GROUND--R3D
GROUND--R2D
GROUND--R1D
5
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