MFJ-934 1.8 – 30 MHz Versatile Antenna Tuner with Artificial GND/TNR


Introducing the MFJ-934 1.8 – 30 MHz Versatile Antenna Tuner with Artificial GND/TNR, the perfect solution for turning a random wire into an effective antenna that works like a charm. Whether you’re travelling, in an emergency situation, or simply in need of a makeshift antenna, this tuner has got you covered.


Combining the best features of the MFJ-941E Cross-Needle Antenna Tuner and the MFJ-931 Artificial Ground, the MFJ-934 comes in a compact cabinet mea0suring just 10 5/8 x 3 1/2 x 8 inches, all while being more affordable than its counterparts. With a power capacity of 300 watts, this full-featured, general-purpose tuner covers a frequency range of 1.8 – 30 MHz, making it suitable for various applications.

Equipped with a two-range, lighted Cross-Needle Meter, the MFJ-934 allows you to conveniently read SWR, forward and reflected power at a glance. Additionally, it boasts a 4:1 balun for balanced lines, an efficient airwound inductor, a special high current/voltage 12-position inductor switch, and two 1000-volt air-variable capacitors. This tuner is capable of tuning all types of antennas and feedlines, be it random wire, coax, or balanced lines.

What sets the MFJ-934 apart is its built-in artificial ground feature. By utilizing the ground matching knob, you can switch in inductance to bring an attached wire to a low impedance current point, forming an artificial ground. Monitoring for maximum ground current is made easy with the push of a button on the Cross-Needle Meter. Experience the surprising efficiency of a random wire antenna when paired with an artificial ground – it may even enable you to communicate with the world without spending hours calling CQ.

When the artificial ground feature is not needed, the MFJ-934 can be used as a full-featured tuner. Its versatility makes it an excellent choice for antenna tuning in any scenario.

Invest in the MFJ-934 1.8 – 30 MHz Versatile Antenna Tuner with Artificial GND/TNR today to enhance your antenna performance, achieve clearer communication, and enjoy the convenience of a compact, feature-rich design.


  • Frequency: 1.8 – 30 MHz
  • Power: 300W
  • Weight: 1.8 kg
  • VSWR & Power Meter: 30/300W
  • Sockets: SO239
  • Terminals for wires and balanced lines
  • Internal 4:1 balun
  • 3-way antenna selector

Additional information

Weight2 kg