Antenna Tuners

They are often called a "transmatch," which I think is more descriptive of the device's function.

We always have the latest MFJ models.

I've selected several MFJ tuners that are a good choice for tuning multiband antennas which require antenna tuners. Both manual tuners and automatic tuner are presented. All of the automatic tuner will tune our CAROLINA WINDOM® antennas and SuperLoop™ antennas on all bands covered by the antenna. The only exception is with the CAROLINA WINDOM® Special series where the lowest band covered has a relatively high SWR and may be out of the range of the automatic tuners. This will not always be the case and will depend on the actual installation (height above ground, quality of earth ground near the antenna, and proximity effects).

If you own an older generation transceiver with an automatic tuner built in, the tuning range may be insufficient for tuning CAROLINA WINDOMS®, SuperLoops™ and other multiband antennas. In this case, you can increase the tuning range of your automatic tuner by as much as 10:1 by adding the MFJ-914 Auto-tuner Range Extender.

Photos are not shown to scale. Descriptions are MFJ's (used with permission)


MFJ-941E

Power rating is 300 watts. Selectable 300/30 watt meter ranges. 8 position ceramic antenna switch. 2 coax lines (direct or through tuner). Random wire and balanced output. Built-in 4:1 balun for balanced output. Meter uses 12 VDC. Power supply is not required.

$129.95


MFJ-949E

This is by far MFJ's most popular tuner. It has all the features and the price is right.

The MFJ-949E is rated at 300 watts and it has a built-in 300 watt dummy load. You may select either peak or average meter readings and the meter is the cross-needle type. Power ranges are 300 or 30 watts, selectable. 8 position ceramic antenna switch. 2 coax lines (direct or through tuner). Random wire and balanced output. Built-in 4:1 balun for balanced output. The meter light uses 12 VDC.
165.00


MFJ-986

Differential-T circuit. Rated at 3000 watts PEP. New, more efficient Roller inductor with 3-digit turns counter. Peak and average reading cross-needle meter. New, more accurate coupler. 6 position ceramic antenna switch. 2 coax lines (direct or through tuner). Random wire and balanced output. 4:1 balun. Meter uses 12 VDC. Power supply is not required.

$ 329.95


MFJ-993B
150 or 300 watts. Full featured with most functions of an antenna analyzer plus a dual-needle wattmeter. Automatic and manual tuning. (An excellent tuner for transceivers ... Jim. W4THU)
$239.95
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 Ohms! The MFJ-993B 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. MFJs exclusive IntelliTuner™, Adaptive Search™ and InstantRecall™ algorithms give you ultra fast automatic tuning with over 20,000 VirtualAntenna™ 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/1000V relays. It learns while you're having fun As you're ragchewing, contesting or DX'ing, 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 VirtualAntenna™ 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 MFJs 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, MFJs 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-993B is the fastest automatic antenna tuner in the world. If it can't 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 can't transmit (for listening out of ham bands). Cross Needle and Digital SWR/Watt Meters Lighted Cross-Needle and digital meters lets 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 10Wx2¾ Hx9D inches. Use 12 - 15 VDC/1 amp or 110 VAC with MFJ-1316, $19.95. Tune any Antenna. You can tune any antenna dipoles, verticals, beams, phased arrays, inverted vees, quads, random wires, mobile antennas, compact limited space antennas. A 4:1 true current balun lets you tune any balanced antenna - - horizontal loops, vertical loops, multi-band doublets, quads, folded dipoles, Zepps.


MFJ-914 Auto-tuner Range Extender

Now you can use the automatic tuner in your transceiver to tune most antennas requiring tuners. Previously, I recommended using only manual tuners. Now, with the MFJ-914, you can extend the range of auto-tuner by a factor of up to 10:1. There is just one multi-position switch on the "914" that you set when you change bands. That's all there is to it. It's a wonderful solution to the limited tuning range of automatic tuners found in most transceivers, especially transceivers over a generation old.

$75.00


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You'll need one or more jumper cables to connect these devices between equipment.

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The real CAROLINA WINDOM® story and Trademark credits.

Go to Jim's Notebook: Look up "How long should wire antennas last?

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