MFJ-5124K/Y Radio Interface
Instruction Manual
2
©
2005 MFJ Enterprises, Inc.
Jumper Settings
Two jumpers, JP1 and JP2, inside the MFJ-5124 are used to select the radio to
interface with. To change these jumper settings:
1. Disconnect the MFJ-5124 from the radio and the tuner.
2. Open the MFJ-5124 case by removing the two screws on the bottom.
3. Configure jumpers JP1 and JP2 according to the following table to
select the radio to interface with.
JP1 JP2
To Interface
Using
A A
Kenwood (auto detected tuner)
†
such as TS-570S, etc.
MFJ-5124K
(6-pin molex)
A B
Kenwood (menu enabled tuner)
such as TS-450S, TS-690S, etc.
MFJ-5124K
(6-pin molex)
A C
Reserved for future use.
B
A
Yaesu FT-857, FT-897
MFJ-5124Y1
(8-pin mini DIN)
B B
Yaesu
FT-100
‡
MFJ-5124Y1
(8-pin mini DIN)
B C
Reserved for future use.
C A
Yaesu
FT-847
MFJ-5124Y2
(DB-9)
C B
Reserved for future use.
C C
Reserved for future use.
† MFJ-5124K factory default.
‡ MFJ-5124Y factory default.
4. Close the MFJ-5124 case and secure with the two screws.
5. Connect the MFJ-5124 to the radio and the tuner.
Kenwood Radio Interface
The MFJ-5124K radio interface allows users of AT-300 compatible Kenwood
transceivers to connect to the MFJ-991, MFJ-993 and MFJ-994
IntelliTuner™
Automatic Antenna Tuners. With this interface, DC power is supplied by the
radio and control signals are connected between the radio and the tuner. The
operator can then control the tuner with a single push of the [AT TUNE] button
on the front panel of the radio.
