Picked up another one of these on ebay, in very good shape. I had one before and put the WA1QIX dx60 mods in it for real hifi audio and was amazed at how well it worked. I sold it for some reason, but this one is in better shape. It had a bad (shorted) 6146 tube in it but everything else seems good. I found a few loose nuts, cleaned the dust out of it and tried iit on a power supply I had around. VFO: very stable (I mean real stable) and accurate, just like the last one. Plenty of power out on CW. AM sounds quite nasty stock. I removed everything in the audio section and will add the WA1QIX mods. I may need to build up a good supply for the radio, the one I was using had the low voltage too low. I may be able to change that. The transmitter seemed to work with 12 vac into it, the relay worked, but that first stage mic preamp may need DC on the filaments to not have a lot of hum in the audio. The MT-1 seems to be one of Heathkits better designs, if I designed it, it would likely be close to the same with just the audio/screen modulator improvements. Its got a very nice tuning VFO with a big scale and no backlash or slop in the knob. Its got a built in T/R relay. Its smaller and light. Its got PTT. Just buld up a robust supply and stick it under the desk out of the way. Tube lineup: 6au6 vfo, oa2 vr regulator, 6cl6 buffer/multiplier, 5763 driver, 6146 output, 12ax7 preamp, 6de7 screen modulator. I find the VFO's in these things amazing, I powered the thing up, set the flex 5000 to zero beat and the MT-1 did not move more then 20 Hz from cold. As received, so far as I have tried, 40 meters is 5 Khz off per the slide rule dial. One annoyance is the band knob is hard to turn, even after lubing the parts, its a smallish chromed knob that is slippery, the chrome looks REAL nice but its slick... With the modulator mods, its a great rig to feed into an amp, the carrier level is adjustable. Peak power will be something around 50 watts and you can run any power from about 3 watts to 15 watts carrier. All the parts seem good for the power and voltage levels. I think I ran the last one at 700 or more volts on the plate for something like 20 watts out. It will also make a nice exciter/driver for a big rig... Unlike some Heathkit stuff, it is a sensible design.