[ICOM] MT-100 tuners

[JerryM]

The Mt-100 Tuner is/was actually made by Nye-Viking and carried the ICOM label. There were almost identical looking Nye-Viking tuners on the market at one time (mid 80's?) at the same time as the 100's. It has a forward and a reverse watt meter with adjustable 12V lighting and comes with a graph to determine SWR instead of the given reflected watts. Coverage is 160-6 meters and maybe higher but I haven't tried 2 meters. 

The 100 is a T-type tuner (CLC) which uses a rather novel switching arrangement for the inductor... the dial knob drives a string and pulley arrangement that moves a conductive wheel tap across the coil instead of switching taps for varying amounts of inductance. The variable caps are more or less standard types. N-V made liberal use of teflon and high quality components in this unit, and I have used it (and still use it) to match a wide variety of antennas to 50 ohms including some rather off the wall set-ups (10 mtr cut down CB antenna on 60 mtrs, , not really efficient but it loaded and transmitted with no sparking or complaints, or 6 m on my 160 m off-center fed dipole which works well for DX when that band opens). 

It works fine at the 100 watt level, and maybe higher but I have never done that. Not yet, anyway.