MFJ-993B Automatic Tuner


  • Antenna tuner with automatic tuning
  • Frequency Range: 1.8 – 30 MHz
  • Power: Up to 300 Watts
  • Balun: 4 : 1 (built-in)
  • Number of Ports: 2 antennas, 1 balun
SKU: 53-455 Category: Tags: , , , ,


World’s first dual power level 300 / 150 Watts SSB / CW tuner

Select 300 Watt SSB / CW power level and match 6 – 1600 Ohm antennas Or, select 150 Watt SSB / CW power level and match extra wide-range 6 – 3200 Ohm.

The MFJ-993B Intelli tuner lets you tune any antenna automatically balanced or unbalanced – ultra fast.

It’s a comprehensive automatic antenna tuning centre complete with SWR / Wattmeter, an antenna switch for two antennas and a 4 : 1 current balun for balanced lines.

MFJ’s exclusive Intelli tuner, adaptive search and instant recall algorithms give you ultra-fast automatic tuning with over 20,000 virtual antenna memories.

You get a highly efficient L-network, 6 – 1600 ohm matching at 300 Watts SSB / CW or extra-wide 6 – 3200 Ohm matching at 150 Watts
SSB / CW, 1.8 – 30 MHz coverage, cross-needle and digital meters, audio SWR meter, backlit LCD, remote control port, radio interface, heavy-duty 16 amp / 1000 V relay.

It learns while you’re having fun. As you’re ragchewing, contesting or DXing, your MFJ-993B is learning!

When you transmit, the MFJ-993B automatically tunes for minimum SWR and remembers your frequency and tuner settings.

The next time you operate on that frequency and antenna, these tuner settings are instantly restored and you’re ready to operate in milliseconds.

MFJ new virtual antenna memory system gives you 4 antenna memory banks for each of 2 antenna connectors.

Select up to 4 antennas on each antenna connector. Each antenna has 2500 memories, 20,000 total.

Intelligent ultra-fast tuning.

MFJ’s instant recall TM 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 Intelli tuner 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-993B is the fastest automatic antenna tuner in the world.

If it can’t accurately determine impedance, MFJ’s adaptive search algorithm
goes into action.

Frequency is measured and relevant component 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 can’t transmit (for listening out of ham bands).

Cross needle and digital SWR / Wattmeters

Lighted cross-needle and digital meters let you accurately read SWR, forward and reflected power at a glance.

An audio SWR meter lets you hear the tuned SWR when you can’t see / read meters.
Turn on a highly visible, instant response SWR LCD bargraph when you need it.

Backlit LCD display

An easy-to-read backlit LCD displays SWR, forward / reflected power, frequency, antenna 1 or 2, L / C tuner values, on / off indicators and other information.

The MFJ-993B is a compact 10 W x 2 ¾  H x 9 D inches. Use 12 -15 V DC / 1 amp or 110 VAC with MFJ-1316.

Remote control plugin the MFJ-993RC, remote control and use your tuner elsewhere remotely.

MFJ-993B interface pre-wired cables

Allows automatic tuning of your MFJ-991B / 993B / 994B Intelli tuner through radio.

MFJ-5124I Icom, supports IC-706, 707, 718, 725, 728, 736, 746, 756, 765, 775, others that support AH-3 or AH-4.
MFJ-5124A Alinco supports DX-70, DX-77 and others.
MFJ-5124K Kenwood, supports TS-50S, 450S, 570S, 690S, 850S, 870S, 2000 and others that support AT-300.
MFJ-5124Y Yaesu, supports FT-100D, FT-857, FT-897, others.
MFJ-5124Y2 Yaesu FT-847.
MFJ-5124Y3 supports Yaesu FT-1000MP and compatibles.