MFJ-939 Plug&Play IntelliTuner Automatic Antenna Tuner
Instruction Manual
2006-2015 MFJ Enterprises, Inc.
15
Connections for the FT-100
1.
Turn the tuner off. Set jumper JP2 to the “Y” position.
2.
Make sure jumper JP4 inside the MFJ-939 is installed.
3.
Before connecting the MFJ-5114Y to your radio, follow the instructions in the radio’s manual for
installing the FC-20 automatic antenna tuner.
a.
Press and hold the [FUNC] key for ½ second to activate the Menu mode.
b.
Rotate the [SELECT] knob to recall Menu #61 [TUNER/ATAS], and then rotate the Main
Dial to change the setting to “tunEr.”
c.
Press the [FUNC] key momentarily to save the new setting and exit to normal operation.
d.
Turn the FT-100’s power off, then on again, to re-initialize the radio regarding the tuner
status.
4.
Turn the radio off. Insert the 8-pin modular plug into the tuner’s RADIO INTERFACE jack.
5.
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.
6.
Connect the 8-pin mini DIN connector to the mating 8-pin mini DIN connector at the end of the
BAND DATA cable pigtail on the back of the radio.
7.
Push the [POWER] button on the tuner to the
in
position and then power on the radio.
Connections for FT-450
1.
Turn the tuner off. Set jumper JP2 to the “Y” position.
2.
Make sure jumper JP4 inside the MFJ-939 is installed.
3.
Before connecting the MFJ-5114Y to your radio, follow the instructions in the radio’s manual for
installing the FC-30/-40 automatic antenna tuner.
a.
Press and hold the [F] button for one second to enter the Menu mode. The “MENU” icon will
appear in the display.
b.
Rotate the [DSP/SEL] knob to select Menu item [TUNER (TUNER/ATAS)].
c.
Press the [DSP/SEL] knob to enable this selected Menu item.
d.
Rotate the [DSP/SEL] knob to change the setting to “EXT ATU.”
e.
Press and hold the [F] button for one second to save the new setting and exit to normal
operation.
4.
Turn the radio off. Insert the 8-pin modular plug into the tuner’s RADIO INTERFACE jack.
5.
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
.
6.
Connect the 8-pin mini DIN connector to the mating 8-pin mini DIN connector, marked as
TUNER, on the back of the radio.
7.
Push the [POWER] button on the tuner to the
in
position and then power on the radio.
Connections for FT-857 or FT-897
1.
Turn the tuner off. Set jumper JP2 to the “Y” position.
