Hey, mc2,
great story of your own! The 122's are bulky and heavy and with JBLs they are totally unbreakable!
B3 and M3 are both of the same motorized tone-generating family. The essential difference is the B3 has an additional octave of keys at the lower end on both manuals - these extra keys have reversed colors - white keys are black, black keys are white.
Some M3 trivia:
Known in the Hammond world as a 'Baby B'.
Tonewheel Organs are as polyphonic as you can get.
No presets.
Built in 11 Watt amp driven by two 6V6 tubes and 12" field coil speaker.
Spinet sized and about 250 pounds in factory configuration; the conversion by Sunn weighs in at about half that.
"Green Onions" by Booker T and the MGs was recorded using a M3.
Keith Emerson used one while performing with "The Nice".
They don't call the M3 the "Baby B" for nothing. Same sweet mellow tones, less lower end.
Internally, it's very much like the B3. It just has fewer keys and no presets. Internal wiring channel is different,
If a B3/C3 isn't available, or too danged big to move, the M3 has nearly everything you'd want. It'll be as nasty or as sweet as you like, from 'Procol Harum' to 'Deep Purple', Steppenwolfe or 'Eagles'... it's all there.
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UPDATE AS OF RIGHT THIS MINUTE: I have received word The Kingsmen did, indeed, have the first conversion, probably 1965 or earlier. Current location unknown. Any help with this?
I really, really, appreciate corrections to my poor history of this. With your help, I'll get it cleaned up and as right as rain!
Please let me know if any of you have photos, maybe in a shoebox at your mother's, or an ex-girlfriend has a picture of garage bands or even the Wailers or Kingsmen playing one of these.
Thanks again, the folks on this forum ROCK!
Martin