Mfj 989c Manual Download
VersaTuner V HF Antenna Tuner. Replaced by the MFJ-989C. Please check our Used List. Recently sold used. Discontinued Amateur Antenna Tuners: This famous MFJ-989B VersaTuner V covers 1.8 to 30 MHz, including MARS and the WARC bands. Capacity is up to 3 KW. The tuner features two massive transmitting capacitors and a roller inductor with a three digit counter. About MFJ-989C Manual The resource is currently listed in dxzone.com in a single category. The main category is MFJ 989C Antenna Tuner that is about MFJ-989C HF antenna tuner. This link is listed in our web site directory since Tuesday Sep 13 2011, and till today 'MFJ-989C Manual' has been followed for a total of 1493 times.So far received 3 votes for a total score of 7.00/10.
This world-famous 3 KW MFJ-989C VersaTuner V features two massive transmitting capacitors and a roller inductor with a three digit counter. A roller inductor lets you tune your SWR down to the absolute minimum--something a tapped inductor tuner just can't do. A 3 digit turns counter plus a spinner knob gives you precise inductance control -- so you can quickly retune to your favorite frequency. You won't have arcing problems with this roller inductor. That's because firm springs put considerable pressure on a plated contact wheel. This gives you excellent electrical contact with the roller inductor wire and eliminates arcing problems. Wide low inductance straps are used for high current connections. A new core gives you excellent RF properties for minimum loss. Ball bearings on both the front and back shafts give you a velvet smooth vernier feel. Steel end plates and steel shafts give you lifetime durability. This High-Q roller inductor is mounted horizontally and centered vertically away from metal surfaces to maintain highest Q for maximum efficiency so you'll get full power out.
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With three continuously variable components--two variable capacitors and a roller inductor--you get the widest matching range and the most precise control over SWR possible. You can tune your SWR down to the absolute minimum from 1.8 to 30 MHz, including MARS and the WARC bands. Plus you have complete control over Q. You can select a low Q when you want convenient broadband coverage or select high Q when you need an extra measure of harmonic attenuation--it's your choice.
You get a super heavy duty balun for balanced lines. It's made with two giant 2 inch powder iron toroid cores and wound with teflon wire connected to high voltage ceramic feed thru insulators. It lets you operate high power into balanced feed lines without core saturation or voltage breakdown.
You get a two wafer ceramic antenna switch with extra large switch contacts to eliminate plugging and unplugging antennas. It lets you select two coax antennas direct or through the tuner, balanced line or random wire and dummy load. Plus you get a built-in 50 ohm 300 watt dummy load that makes exciter tuning fast and easy.
Frequency range is 1.8 to 30 MHz. The peak and average reading cross-needle SWR/power meter has forward power ranges of 200 and 2,000 watts. The back panel has outputs for two coaxial cables, one wire or balanced line and dummy load are provided. Lighted meter with on/off switch (Light uses 12 VDC or 110 VAC with optional MFJ-1312D). Size: 10¾ x 4½ x 15 inches.
Mfj 989c Roller Inductor
MFJ's AirCore Roller Inductor, new gear-driven turns counter and weighted spinner knob gives you exact inductance control for absolute minimum SWR.
You can match dipoles, verticals, inverted vees, random wires, beams, mobile whips, shortwave -- nearly any antenna. Use coax or balanced lines. You get everything you've ever wanted in a high power, full featured antenna tuner -- wides matching range, lighted Cross-Needle SWR/Wattmeter, antenna switch, built-in dummy load, balun -- all in a sleek, compact cabinet.
MFJ AirCore Roller Inductor MFJ's exclusive heavy duty AirCore Roller Inductor has an air core that can't burn up! Get ultra high-Q, lowest loss, highest efficiency and highest power handling of any roller inductor in ham radio. MFJ's exclusive Self-Resonance Killer keeps damaging self-resonances away from your operating frequency. Large, self-cleaning wiping contact gives excellent low-resistance connection without contact arcing or burning. Solid 1/4 inch brass shaft, self-align bearings give smooth non-binding rotation. Competing tuners use a lossy, low Q, solid plastic core with erratic electrical contacts and have potentially damaging self-resonant frequencies. This can cause excessive heating and melt the core!
A new precision gear driven 3-digit turns counter lets you accurately reset your roller inductor for quick band changing. Weighted spinner knob or roller inductor gives you smoother flywheel tuning. Look inside .. You'll see two super heavy duty transmitting variable capacitors that can handle 6000 volts. Extra wide stator plate spacing gives you arc-free operation. Specially shaped plates give low minimum capacitance when unmeshed. this and a hefty 250 pf maximum give you an extremely wide matching range -- even on 160 meters and 10 Meters.
The nearest competing 'legal limit' tuner has variable capacitors physically small than MFJ-989C's. Theirs is rated at 4500 volts -- a full 25% less than the MFJ-989C. Theirs is more likely to arc -- not what you want in a 'legal limit' tuner! MFJ-989C's super heavy duty antenna switch is made of two individual ceramic wafers wired in parallel. Extra wide spaced heavy duty contacts handle extreme voltages and currents. We've never burned one up!
You can select two coax antennas (directly or through tuner), balanced line/random wire, or built-in dummy load. MFJ's super heavy duty TrueCurrent balun for balanced lines uses two gain 2.5 inch toroid cores. It's wound with Teflon wire connected to high-voltage glazed ceramic feedthrough insulators. The MFJ-989C lets you safely operate high power into balanced feedlines without core saturation or voltage breakdown. Some 'legal limit' tuners have inferior voltage baluns with smaller diameter toroid cores and use soft plastic feedthrough insulators that can arc and melt.
A full-size 300 Watt non-inductive 50 Ohm dummy load is built into MFJ-989C. You'll find it handy for transmitter tuning, testing and repairing rigs, setting power level, adjusting mic gain and more. Some 'legal limit' tuners don't have a built-in dummy load. They want you to pay for external loads that get in your way.
Lighted Cross-Needle SWR/Wattmeter lets you monitor SWR, forward and reflected power simultaneously. Read both peak and average power in two power ranges. Meter lamp requires 12 VDC or 110 VAC with MFJ-1312D (the MFJ-1312D is a 12 Vcd 500 ma AC Adapter with a 2.1mm jack). The compact MFJ-989C slides right into your operating position -- you'll hardly know it's there.
The MFJ-989 Has a nearly indestructible multi-color Lexan front panel. It's detailed logging scales and legends will be legible for a lifetime of DXing. MFJ-989C uses PEM nuts (not self-tapping screws), wing nut ground post (not a cheap nut), fire-retardant epoxy glass PC board (not canvas based), heavy gauge wire thru-out (not small gauge), locking compound on nuts/bolts (not loose hardware).
Mfj 989c Parts
Every MFJ-989C is protected by MFJ's famous one year No Matter What limited warranty. We will repair or replace your MFJ-989C (at our option) for a full year.