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MFJ-991B
HF Automatic Tuner

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MFJ-991B

The MFJ-991B IntelliTuner™ lets you tune any antenna automatically balanced or unbalanced - - ultra fast. It’s a comprehensive automatic antenna tuning center complete with SWR/Watt-meter, antenna switch for two antennas and 4:1 current balun for balanced lines.

MFJ's exclusive IntelliTuner™, Adaptive Search™ and InstantRecall™ algorithms give you ultra fast automatic tuning with over 10,000 non-volatile revolving memories. You get a highly efficient L-network, wide 6-1600 ohm matching at full 300 Watts SSB/150 Watts CW, 1.8-30 MHz coverage, Cross-Needle meters, remote control port, radio interface, heavy-duty 16 amp/1000 volt relays and more. As you are ragchewing, contesting or DXing, your MFJ-991B is learning! When you transmit, the MFJ-991B automatically tunes for minimum SWR and remembers your frequency and tuner settings. The next time you operate on that frequency, these tuner settings are instantly restored and you are ready to operate in milliseconds! Thee data is safely stored in non-volatile revolving memory.

MFJ's InstantRecall™ first checks its memory to see if you have operated this frequency before. If so, tuning is instantaneous and you re ready to operate. If not, MFJ's IntelliTuner™ algorithm - - based on MFJ's famous SWR Analyzer technology - - kicks in. It measures the complex impedance of your antenna. Next, it calculates the components it needs and instantly snaps them in. Then, it fine tunes to minimize SWR -- you’re ready to operate. It’s all done in a fraction of a second. When the impedance is within its measurement range, the MFJ-991B is one of the fastest automatic antenna tuner in the world. If it cannot accurately determine impedance, MFJ’s AdaptiveSearch™ algorithm goes into action. Frequency is measured and relevant components values are determined. Only those values are searched for ultra-fast tuning. For even faster searches, you can set the target SWR to 2 (settable 1.0-2.0). You can manually tune when you cannot transmit (for listening outside of the ham bands).

Requires 12-15 VDC at 1 Amp or optional MFJ-1316 (see below). Only 10.1W x 2.8H x 9.2D inches.

Order # Item Description Price Order
   MFJ-1316 12 VDC 1200mA AC Adapter Not in stock
   MFJ-5124I Interface cable Icom IC-706/718/725/728/736/746/756/765/775. Not in stock
#3626 MFJ-5124K Interface cable Kenwood TS-50/450/570/590/690/850/2000. $63.95 Order
#3620 MFJ-5124Y Interface cable Yaesu FT-100D/450/857/897/950. $64.95 Order
  MFJ-5124Y4 Interface cable Yaesu FT-2000/2000D. Discontinued
   MFJ-993RC Remote control. VIEW Not in stock


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