![]() ![]() Granted, being an MFJ product, it's built down to a price. ![]() The coil does not move or deform as the roller moves through it. There's a shaft running through the axis of the coil with a roller attached to an arm so that the roller rolls along the inside of the coil. There's a coil of stiff wire that is held in place at 0, 90, 180, and 270 degrees around the coil by what looks like circuit board material that has been notched to maintain the spacing of the coil. ![]() Definitely doesn't turn as easy as the rotary encoder tuning knobs on my radios, but it seems to turn easier than when I first got the tuner.įor those wondering, this tuner uses what I understand is called a "slinky" style roller inductor. With some effort, I can turn the inductor knob using just the finger hole on the knob. Subjectively, the inductor knob seems to turn easier. I also sprayed a couple spritzes of Deoxit D5 on the switch contacts and worked the switch back and forth several times. I put a couple dabs of white lithium grease on the turns counter gears and then wiped off the excess.Īnd, I sprayed a couple spritzes of dry teflon lube into the bearings at either end of the roller inductor shaft. Both used for testing only, short duration use. Most ships don't carry enough spare SPP jacks to fix them all.įor the record, I do own two mag mounts, one with a UHF connector and one with a mini-UHF connector. The solvent would get into the cartridges and cause them to fail.Īnd an IC guy in the navy, that used it on the sound powered phone jacks, only to discover it destroyed them. Once you use that stuff, you never go back.Īnd I recall my uncle talking about when WD-40 came out, people using it for lubing guns. If you think Duct/Duck tape is wonderful stuff, you need to get a big ol' roll of gaffers tape and really live the high life. To me, either one works, and when you tell someone you want duct tape, they likely are not hearing the difference between the K and the T.īut, yeah. I've never seen a ventilated duck.īut some say it originated as "Duck tape" as it was used to seal ammunition boxes in WW2, as in "water off a ducks back". There is a 2.5mm DC jack on the rear panel for 12 VDC if illumination is desired.Ĭopyright 2016-2019, Universal Radio, Inc.Duct Tape used to seal ventilation ducts. The illuminated meter with on/off switch. The back panel has outputs for two coaxial cables, one wire or balanced line and dummy load are provided. The peak and average reading cross-needle SWR/power meter has forward power ranges of 200 and 2,000 watts. Plus you get a built-in 50 ohm 300 watt dummy load that makes exciter tuning fast and easy.įrequency range is 1.8 to 30 MHz. It lets you select two coax antennas direct or through the tuner, balanced line or random wire and dummy load. You get a antenna switch with extra large switch contacts to eliminate plugging and unplugging antennas. A 3 digit turns counter plus a spinner knob gives you precise inductance control A roller inductor lets you tune your SWR down to the absolute minimum-something a tapped inductor tuner just can't do. ![]() The tuner features two massive transmitting capacitors and a roller inductor with a three digit counter. This famous MFJ-989B VersaTuner V covers 1.8 to 30 MHz, including MARS and the WARC bands. ![]()
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