Sequential Circuits Prelude -1982    Weight = 20 Lbs. Number mfg.= ? MRP=$?

User Manual:
Reset Proceedures: N/A
Operating System code: N/A
MIDI or other control protocol: N/A
Software related Links: N/A
Patches or knob settings: sdscan of prelude patch book
Circuit Overview: below
Scematics/Service Manual:
Common Service Issues/Tips: below
Parts Sources: Keys knobs semiconductors misc
Uncommon chips/modules used: M086B1 TOS, TDA1008 dividers, UA3086, LM13700, 3-TDA1022 bbd's
General Info Links: Vintage Synth Explorer

Circuit Overview:
     A divide down tone generation based synth with 4 switches for Brass, Organ, Piano, Strings. Each of these sections has some parameters including a nice sounding filter in the brass section and some preset voices of course. Boinky dull pianos sort of but nice strings with a 4.7uF and 1 uF 63V electrolytic capacitor for polyphonic envelopes...(AR). Also EXCELLENT mix between organ and brass to form a really useful funky organ, enhanced by the right brass settins w/resonance and also EQ and Chorus selected with the eq trimmed right. Tone generation is via M086 TOS and TDA1008 dividers (as used in Crumar Performer and some others, and has same keys too).

Service Tips:
     While they aren't as bad as ARP Omni's get yet on any of mine, the capacitors have drifted and they ARE quite varied in their decay times of course. I plan to replace them all at the first opportunity.

I should have most of the electronic parts in stock.
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