via this auction
"1972 original Minimoog, serial number is #1442, the 442nd production model in April of 1972. It has the plexiglass pitch and modulation wheel from the Minimoog's original design.
It features the original Moog 1st generation oscillators. 
It has completed a complete overhaul, locally with extended warranty. 1) All the switches have been cleaned.
2) The oscillators have been stabilized.
3) The keyboard has been "re-bushed" and plays like factory new.
4) The busbar has been cleaned.
5) Every "engineering change order" has been completed.
6) All capacitors in the power supply have been replaced.
7) Voice cards now have 28 turn trimmers for fine tuned and calibrated.
It utilizes a Roland MPU-101 and a Studio Electronics midi'd modification done in 1987, and it can be played from a external midi keyboard, or sequenced from a computer. The modification includes the following:
1) BEND RANGE: Adjust the range of pitch bend on moog pitch wheel and "bend" input from midi. Full on equals one octave up and down. Moog pitch wheel is disabled when "bend in" is used.
2) DYN VCF: Adjusts amount of Velocity information sent to filter when "DYN VCF" switch is up. "Filter Cutoff" should be set very low since these controls both affect brightness.
3) LFO RATE: Adjusts speed of modified triangle wave LFO provided by midiready. New LFO is selected when "modulation mix" control is fully counter clockwise. Turning "MOD MIX" clockwise mixes in either noise or Oscillator 3, depending on the setting of NOISE/OSC3 switch.
4) DYN VCA: When up, allows midi keyboard dynamics to control volume of Minimoog. This Switch must be down if Minimoog is used without MPU 101.
5) DYN VCF: When up, allows keyboard dynamics to control filter brightness. Amount is controlled by "DYN VCF".
6) MOD VCF: When down, Mod wheel on midi master controls Minimoog filter brightness, when up, mod wheel controls modulation. This has no effect on the the Moog mod wheel, it always modulates.
7) TOUCH VCF: When up. aftertouch from midi master increases filter brightness.8) TOUCH MOD: When up, aftertouch controls modulation depth.
9) NOISE/OSC3: Controls which signal is applied to right side of "mod mix" control. When down, OSC 3 is selected and when up NOISE is selected. The selected signal may then be mixed with the new LFO to create some unusual modulation waveforms.
10) Included is a rare "Multi-Trigger" mod by Studio Electronics where the key you hit always triggers an attack sound.
It comes with a case to carry the Moog, and the Roland MPU, and a manual.
There is a splintered off wood trim piece on top.
This is an early version of this instrument, if you are interested in collecting. And it's in top notch shape for playing, whether you use the reconditioned keyboard or midi."
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