MFJ MFJ-989D - Front Panel Layout and Controls; Key Front Panel Controls

MFJ-989D VersaTuner V Instruction Manual
5
+
-
+
-
2.1 mm
Important Note: You don't need to disconnect the battery when using external dc power. It is
protected from back-feed and won't be damaged by the other source.
Important Warning: Never connect an ac-voltage or positive-ground source to the Meter Lamp jack
or permanent damage may result!
Front Panel Layout
TRANSMITTER
ANTENNA
INDUCTANCE
0 5 0
ANTENNA
SELECTOR
RANGE POWER LAMP
Coax-1
Dummy
Coax-2 Direct
Coax-1 Direct
Wire/Bal
Line
Coax-2
Load
On
Off
Hi
Low
Avg
2
1
3
4
56
7
8
9
MFJ VersaTuner V
MFJ-989D
PK
0
10
0
10
1.) Transmitter Tuning Capacitor: Series capacitor on the Transmitter side of the T-network.
Maximum capacity at 0
knob setting and minimum capacity at 10.*
2. Antenna Tuning Capacitor: Series capacitor on the Antenna side of the T-network. Maximum
capacity at 0 and
minimum capacity at 10.*
3. Rotary Inductor: Continuously adjustable shunt Inductor with maximum inductance at 000
and
minimum inductance at 090
.*
4. Antenna Selector: Routes signals inside the tuner and selects Antenna.
5. Forward Power Scale: Displays Forward Power (300-W or 3-kW scale).
6. Reflected Power Scale: Displays Reflected Power (60-Watt or 600-Watt scale).
7. Range HI/LO: Selects the metering circuit power range (x1, x10).