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Mfj-986 differential-t 3 kw antenna tuner
MFJ-986 Differential-T 3 Kw Antenna Tuner
Roller Inductor Tuner with internal Cross-Needle SWR Meter
Approximately 5 x 11 x 16 inches (HWD)
Excellent, cosmetically and functionally, - No Field Day or other harsh use, Never abused electrically. Highest input power ever used was 200 Watts PEP SSB. See pics - Any surface blemishes on the front panel are only reflections of the shiny bench used during photo shoot. Minor scratch around small speed knob of Inductance Control.
CONNECTIONS (Standard PL-259 mating connector - "UHF style")
One unbalanced coaxial marked "Transmitter"
One unbalanced coaxial marked "Coax 1"
One unbalanced coaxial marked "Coax 2"
One unbalanced coaxial marked "External Dummy Load"
One balanced output marked "Balanced Line"
Jack on rear panel for meter lamp power input
Note - All coaxial Jacks are SO-239
Built-In Twin Needle SWR Meter with meter lamp
Meter continuously displays SWR, forward and reflected power
Meter Power Switches, Hi(2,000 watts)/Lo(200 watts) and Peak/Avg
Covers 1.8-30 MHz continuously, no band switching
Power Rating: 3Kw PEP SSB maximum final amplifier input power
Antenna Selector switch selects one of two coax lines, or random wires, either direct to the transmitter or through the tuner, or selects the balanced line or external dummy load.
See Included Pics (No Band Switching required)
- Adapter or power supply for meter lamp. Any 12 volt DC source is OK. (Optional item not originally supplied with tuner)
- Coaxial cable to connect transmitter to tuner
Item was purchased new, one owner, and was primarily used to feed a 450 ohm balanced ladder line to a full wavelength 80 meter loop.
Power Rating Note - This is based on an outdated method of referencing the final amplifier used to supply the tuner. The antenna load itself also affects the power that the tuner can safely handle. The maximum recommended input to the tuner is 1500 watts PEP (750 watts CW, or less).
Also see the following for the MFJ manual in pdf file format:
http:// /support.php?productid=MFJ-986
