Circuit Overview:
A two VCO subtractive analog monosynth has a polysynth section as well. Kind of like a really shrunken DS-2 in that way :-). Random waveshape (S+H as it would read on non-consumer packaged synths), 'bell tone' which would read 'sub octave'... tone one and tone two would be vco1 and vco2 of course. It also has a sync, three way switch for keyboard tracking and three way for vca options. Only A-R contour though. Still a great sounding little machine for capturing the essence of a moog synth!
Service Tips:
Not aware of a particular weakness on these other than dirty sliders. Once these sliders break there is no off the shelf replacement but I've seen 'chipsforbrains' on ebay sell sets of them..after I went to the pain to repair most of mine and replace one with a near enough retro. These sliders can be pulled apart, cleaned, regreased with conductive grease and various shaft repairs made at times or parts swapped out with other units to create one good one out of two with different problem parts. (EG. one has a broken shaft, the other a worn out resistive coating.) Using soldering surgery techniques sliders with bad connection right a the resistive material interface can occasionally be fixed using springy wire and hemostats! A GREAT tech site for the MG-1 HERE
Parts:
Have most of the parts here for them electronically.
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