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MFJ Enterprises Original MFJ-931 1.8-30 MHz HF Artificial RF Ground.

MFJ Enterprises Original MFJ-931 1.8-30 MHz HF Artificial RF Ground.

MFJ Enterprises Original MFJ-931 1.8-30 MHz HF Artificial RF Ground.

  • MFJ-931 creates an artificial RF ground! It resonates a random length of wire thrown along the floor and produces a tuned counterpoise. This ground effectively places your rig near actual earth ground potential even if your rig is on the second floor or higher with no earth ground possible.
  • Also, the MFJ-931 electrically places a far away RF ground directly at your rig — no matter how far away it is. It reduces the electrical length of the ground connection wire to virtually zero by tuning out its reactance.
  • The MFJ-931 connects between your rig and a random length of wire or a connecting ground wire. Its tuned for maximum ground current using the built-in RF ammeter. The MFJ-931 Artificial RF Ground covers 1.8 – 30 MHz and measures a compact 7.5W x 3.5H x 7D inches.

Create an artificial RF ground For Your Transceiver with the MFJ-931!

It effectively produces earth ground potential even if your rig is indoors, on the second floor or higher with no earth ground possible!

It electrically places far away RF ground at your rig. Hows your RF ground? Do you have RF “hot spots” that “bite” you when you transmit? Do you have RF feedback that causes your rig to quit working on some bands? Do you have TVI/RFI that makes your neighbors hard to live with? Do

List Price: $ 113.90

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MFJ Enterprises MFJ-986 1.8 ~ 30 MHz Rugged Roller Inductor Differential-T Antenna Tuner 3KW PEP Amplifier Input Power (1500 Watts PEP SSB output power). Also Covers MARS & WARC Bands. Reviews

MFJ Enterprises MFJ-986 1.8 ~ 30 MHz Rugged Roller Inductor Differential-T Antenna Tuner 3KW PEP Amplifier Input Power (1500 Watts PEP SSB output power). Also Covers MARS & WARC Bands.

MFJ Enterprises MFJ-986 1.8 ~ 30 MHz Rugged Roller Inductor Differential-T Antenna Tuner 3KW PEP Amplifier Input Power (1500 Watts PEP SSB output power). Also Covers MARS & WARC Bands.

  • MFJs exclusive AirCore Roller Inductor gives absolute minimum SWR — something tapped inductors just cant do. 3-digit turns counter plus a spinner knob gives precise inductance control so you can quickly retune your frequency. A lighted peak and average reading Cross-Needle meter shows SWR, forward and reflected power at a single glance!
  • You get 6-position antenna switch that lets you select two coax lines and/or random wires (direct or through tuner), balanced line and external dummy load. The MFJ TrueCurrentBalun for balanced lines minimizes feedline radiation that causes field pattern distortion, TVI and RF in you shack. Ceramic feedthru insulators for balanced lines withstand high voltages and temperatures.
  • Wide-spaced tuning capacitor plates let you run high power without arcing. MFJs lighted Cross-Needle Meter shows you SWR, forward and reflected power simultaneously. It reads peak or average power on 2000 or 200 Watt ranges. The lamp has on/off switch nd uses 12 VDC or 110 VAC with MFJ-1312D ** Not included **
  • Replacing two variable capacitors with a single differential capacitor gives a wide range T-Network tuner with only two controls — a tuning capacitor and a roller inductor. Simple 2-knob tuning makes tuning easier than ever. You get minimum SWR at only one setting a broadband response that ends constant re-tuning. Youll spend your time QSOing instead of fooling with your tuner. The compact cabinet has plenty of room to mount the roller inductor away from metal surfaces for highest Q — you get high efficiency and more power into your antenna.
  • More tuners use a voltage balun that forces equal voltages on the two antenna halves. It minimizes unbalanced currents only if the antenna is perfectly balanced — not the case with practical antennas. The MFJ-986 uses a true current balun to force equal currents in the two antenna halves — even if the antenna is not perfectly balanced! The MFJ TrueCurrentBalun gives superior balance over voltage baluns and minimizes unbalanced current. This reduces field pattern distortion, concentrates your power for a stronger signal plus it reduces TVI and RF in your shack caused by feedline radiation.

MFJs innovative Differential-T Tuner uses a differential capacitor that makes tuning easier than ever. It gives minimum SWR at only one setting. Broadband coverage ends constant re-tuning. The MFJ-986 is a rugged roller inductor antenna tuner that handles 3KW PEP SSB amplifier input power (1500 Watts PEP SSB output power). It tunes 1.8 – 30 MHz continuously, including MARS and WARC bands.

List Price: $ 335.00

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