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Reduced Price 300W HF Antenna Tuner / Artificial Ground, 1.8-30 MHz Expand

MFJ 300W HF Antenna Tuner / Artificial Ground, 1.8-30 MHz

MFJ Enterprises, Inc.

MFJ-934 by MFJ Enterprises, Inc.


The MFJ-934 combines a versatile antenna tuner with an artificial ground. It turns a random wire into an effective antenna that works. Great for traveling, emergency or as a makeshift antenna.

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You get all the best features of the MFJ-941E Cross-Needle Antenna Tuner and the MFJ-931 Artificial Ground in a single compact cabinet for less cost.

Even if you have a good ground, a long connection wire can ruin its effectiveness by isolating a true RF ground from your rig, you might have these following problems caused by poor RF grounding, especially if your rig is on a second floor with no ground at all:

  • RF "hot spots" that "bite" you when you transmit
  • RF feedback that causes your rig to quit working on some bands
  • TVI/RFI that makes your neighbors hard to live with
  • Weak signal reports because of extreme ground losses or radiation pattern distortion

The MFJ-934 is unique because it has a built-in artificial ground. A ground matching knob lets you switch in inductance to bring an attached wire to a low impedance current point to form an artificial ground. A push button lets you use the cross-Needle Meter to monitor for maximum ground current.

With an artificial ground to work against, youll be surprised to see how well a random wire can work. Don't be surprised if you can work the world without hours of calling CQ. When you don't need the artificial ground feature, you can use the MFJ-934 as a full featured tuner.


  • 300 Watt full-featured, general-purpose antenna tuner
  • 2 ranges: lighted Cross-Needle Meter that lets you read SWR, forward and reflected power all in a glance and a 4:1 balun for balanced lines
  • Efficient airwound inductor, special high current/voltage 12 position inductor switch and two 1000 volt air-variable capacitors
  • Tunes all types of antennas and feedlines including random wire, coax and balanced lines
  • Cover 1.8-30 MHz
  • Size: 10" x 8" x 3.5" (W x D x H).

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