Page 5 of MFJ 2006 Catalog by MFJ Enterprises, Inc.

Antenna Tuner/Artificial Ground 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. You get a 300 Watt full featured antenna tuner that covers 1.8-30 MHz. Lighted CrossNeedle meter reads SWR/Forward/ Reflected power at-a-glance. 4:1 balun for balanced lines. Features efficient airwound inductor, high current/voltage 12-position inductor switch and two 1000 volt air-variable capacitors. Tunes all antennas and feedlines including random wire, coax and balanced lines. 10 5/8Wx3 1/2Hx8D in. MFJ Artificial RF Ground Places your rig near earth ground potential! Create an artificial ground with this MFJ-931! It 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! It electrically places a 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 you get weak signal reports because of extreme ground losses or radiation pattern distortion? These problems could be caused by poor RF grounding, especially if your rig is on a second floor with no ground at all. Even if you have a good ground, a long connection wire can ruin its effectiveness by isolating true RF ground from your rig. MFJ-931 $89 95 Ship Code A Continued . . . MFJ-931 creates an artificial ground! It resonates a random length of wire thrown along the floor and produces a tuned counterpoise. This artificial ground effectively places your rig near actual earth ground potential with no earth ground possible. Reduces the electrical length of the ground connection wire to virtually zero by tuning out its reactance. 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. 1.8 to 30 MHz. 7 1/2Wx3 1/2 Hx7D inches. RF tight aluminum cabinet. New! 4 Foot Ground Rod Durable four foot copper bonded steel earth ground rod is a tough 3/8 in. diameter that will last and last. Sharp pointed end makes it easy to drive into the ground. Use it to tie your equipment to a single earth ground to help bleed off static and RFI and prevent RF hot spots. Use several to form a good RF ground for random, long wire and vertical antennas. MFJ-1934 $4 95 Ship Code B MFJ-934 $179 95 Ship Code B MFJ . . . The World Leader in Ham Radio Accessories 5 The MFJ-9982 ContinuousCarrier TM antenna tuner handles 2500 Watts continuous carrier output on all modes and all HF bands into most unbalanced antennas even on 160 Meters where even the best antenna tuners fail! The MFJ-9982 gives you every feature you'll ever want in a high power tuner -wide matching range, 1.8 to 30 MHz coverage, 6-position antenna switch, 4-core balun, dummy load, true peak/average lighted SWR/Wattmeter, 6:1 reduction drives with detailed logging scales, 3digit turns counter, extra large knobs. New Components, New Technologies The Heart and Soul of the MFJ-9982 is its roller inductor and variable capacitors. MFJ's high power, high-Q continuous current AirCore TM roller inductor is no ordinary roller inductor! Its edge wound from thick .06-inch silver-plated solid copper strap. It can carry huge circulating RF currents and withstand tremendous heat that'll melt or burn up ordinary roller inductors. Self-insulating construction reduces stray capacitance keeps self-resonant frequencies high and out-of-the-way. Dual, silver-plated compression wheels give ultra low-resistance contacts. New fast-tune crank knob. High-current, high-capacitance 1000 pF and 500 pF air variable capacitors have low minimum capacitance and are self-insulating. These newly developed capacitors and MFJ's patent pending innovation gives you very high efficiency on 160/80 Meters and extremely wide matching range on 10/12/15 Meters at 2500 Watts a feat only the MFJ-9982 has achieved. Hi-Voltage/Current Antenna Switch The antenna switch is completely isolated to handle high-voltage high impedance antennas. High-current, low impedance antennas are handled by parallel sets of highcurrent contacts of two ceramic switches. New 4-Core Balun Powerful balun Four 2 1/2 inch cores, 12-gauge Teflon TM wire. Run balanced lines at full 2500 Watts SSB/CW continuous, 24/7. New Balanced Line Feed-Thru Insulator Allows massive antenna currents to flow directly to the antenna capacitor without passing though lossy screws or bolts. TrueActive TM Peak Reading Circuit New TrueActive TM circuit reads true peak or average power on all modes. Cross-Needle meter reads SWR/forward/reflected power. 1500 Watt Dummy Load 1500 Watt air-cooled non-inductive 50 Ohm resistor. 100W/10 min., 1.5kW/10 sec. New Cabinet maintains high Q New roomy cabinet maintains high Q. Vent holes. Heavy gauge, .08 inch aluminum braced chassis. Vinyl cover, nonstripping PEM nuts, heavy 10-gauge or copper strap wiring throughout. 13 Wx7Dx16 D inches. 15 pounds. MFJ 2500 Watts ContinuousCarrier TM Tuner Silver plated Edge-Wound Roller Inductor . . .1000/500 pF Variable Capacitors . . . Antenna Switch . . . 4-Core Balun . . . true Peak Cross-Needle SWR/Wattmeter . . . Dummy Load . . . Extremely Wide Matching Range . . . Patent Pending . . . MFJ-9982 $699 95 Ship Code A Patent Pending

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