
MFJ-939 Plug&Play IntelliTuner Automatic Antenna Tuner
Instruction Manual
2006-2015 MFJ Enterprises, Inc.
16
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 automatic antenna tuner. For the following, use the [FUNC] key and the
[SELECT] knob on the FT-857, or use the [F] key and the [MEM/VFO CH] knob on the FT-897.
a.
Press and hold the [FUNC] or [F] key for one second to activate the Menu mode.
b.
Rotate the [SELECT] or [MEM/VFO CH] knob to recall Menu Mode #001 [EXT MENU],
and then rotate the Main Dial to change the setting to “ON” to enable extended Menu Mode.
c.
Rotate the [SELECT] or [MEM/VFO CH] knob to recall Menu Mode #020 [CAT/LIN/TUN],
and then rotate the Main Dial to change the setting to “TUNER.”
d.
Press and hold the [FUNC] or [F] key for one second to save the new setting and exit to
normal operation.
e.
Turn the radio off, then on again. Do not connect the MFJ-5114Y before changing the Menu
Mode #020 [CAT/LIN/TUN].
f.
Press and hold the [FUNC] or [F] key for one second to activate the Menu mode.
g.
Rotate the [SELECT] or [MEM/VFO CH] knob to recall Menu Mode #085 [TUNER/ATAS],
and then rotate the Main Dial to change the setting to “TUNER.”
h.
Press and hold the [FUNC] or [F] key for one second to save the new settings 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
CAT/LINEAR, 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-950
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-40 automatic antenna tuner.
a.
Press the [MENU] button momentarily to enter the Menu mode.
b.
Rotate the [SELECT] knob to select Menu item [110 TGEN EXT TUN]. Press the [SELECT]
knob momentarily to toggle the display between [110 TGEN] and [EXT TUN].
c.
Rotate the [CLAR/VFO-B] knob to change the setting to “Etu” to enable the External Tuner.
d.
Press and hold the [MENU] button for one second to save the new setting and exit to normal
operation. If you only
momentarily
press the [MENU] button, the new setting will
not
be
retained.
4.
Turn the radio off. Insert the 8-pin modular plug into the tuner’s RADIO INTERFACE jack.