MFJ-993B IntelliTuner Automatic Antenna Tuner Instruction Manual
2005-2012 MFJ Enterprises, Inc.
40
Yaesu Radio Interface/MFJ-5124Y3
The MFJ-5124Y3 radio interface allows users of Yaesu FT-1000MP series and FT
DX-9000 series
transceivers to connect to the MFJ-993B IntelliTuner™ Automatic Antenna Tuner. With this interface,
control signals are connected between the radio and the tuner. With this cable the operator can control the
tuner and radio with a single push of the [TUNE] button on the front panel of the MFJ-993B.
Connections for FT-1000MP series of radios
1. Before connecting the MFJ-5124Y3 to your radio, set the maximum TUNE power of the radio as
follows:
a. On your transceiver, enter the Menu mode by pressing and holding the [FAST] key and then
pressing [ENT].
b. Rotate the [MEM/VFO CH] knob until you see menu 4-3 on the transceiver’s CH display.
c. Rotate the [MAIN VFO] knob to select 50 for 100-watt radios (FT-1000MP/MP Field) or 75
for the FT-1000MP MKV when an amplifier will be used. This gives the best SWR
accuracy, which may be important for solid-state amplifiers. When an amplifier is not used,
the setting can be set at 10 for all transceivers.
d. Press [ENT] to exit the Menu mode.
2. Insert the 3.5 mm stereo phone plug into the MFJ-993B RADIO INTERFACE jack.
3. Connect the 3.5 mm mono plug on the MFJ-5124Y3 to the REMOTE jack on the rear panel of
the transceiver.
4. Connect a 12V 1000 mA DC source to the MFJ-993B.
5. Push the [POWER] button on the MFJ-993B to the in position. The radio may be powered on
either before or after the tuner is powered on.
Operation for FT-1000MP series of radios
The transceiver is controlled by the MFJ-993B. To operate:
1. Press the [TUNE] button on the MFJ-993B for ½-2 seconds to initiate the tuning process. The
radio will automatically transmit a low-power carrier and start the tuning process. When tuning is
completed, the radio will stop transmitting and you will be ready for operation on this frequency.
Connections for FTDX-9000 series of radios
1. Before connecting the MFJ-5124Y3 to your radio, set the maximum TUNE power of the radio as
follows:
a. On your transceiver, enter the Menu mode by pressing the [MNU] key momentarily.
b. Rotate the Main Tuning Dial knob until you see menu item [157 EXT AMP TUNING PWR]
on the transceiver’s display.
c. Rotate the [CLAR/VFO-B] knob to select 50 watts for best SWR accuracy. The TUNE
power varies with the output power level control setting, so ensure that the TUNE power is
somewhere between 20-50 watts.
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