MFJ-991B IntelliTuner Automatic Antenna Tuner
Instruction Manual
2005-2012 MFJ Enterprises, Inc.
25
Alinco Radio Interface
The MFJ-5124A radio interface allows users of EDX-2 compatible Alinco transceivers to connect to the
MFJ-991B
IntelliTuner
™ Automatic Antenna Tuner. With this interface, power and control signals are
connected between the radio and the tuner. The operator can then control the tuner with a single push of
the [TUNE] button on the front panel of the radio. Supported Alinco radios are DX-70, DX-77, DX-701,
DX-801, and any Alinco radio that supports the Alinco EDX-2 tuner.
Connections
1.
Insert the 3.5 mm stereo phone plug into the tuner’s RADIO INTERFACE jack.
2.
Insert the 2.1 x 5.5 mm coaxial power plug into the tuner’s POWER jack.
3.
Important:
Make sure the DC power to the radio has been turned off. The radio does not fuse the
DC power to the tuner, and damage to the radio can occur if the interface’s power connection
comes in contact with ground.
4.
Connect the 5-pin molex connector to the mating 5-pin molex connector, marked as ACC, on the
back of the Alinco radio.
5.
Push the [POWER] button on the tuner to the
in
position and then power on the radio.
Operation
The operation of the MFJ-5124A radio interface is similar to the operation of the EDX-2 described in the
Alinco operating manual.
1.
Push the [TUNE] button on the radio to initiate automatic tuning process; for DX-70 press
[FUNC] then [TUNE]. The radio will automatically switch to CW mode, transmit a 10-watt
carrier, and start the tuning process. “TUNE” appears in the radio’s LCD while tuning; do not
change the frequency or mode while tuning. When the tuning process is completed, the radio will
stop transmitting, return to its previous mode and power setting; “TUNE” disappears.
Note the [TUNE] button on the tuner will also key the Alinco radio interface.
