PPG EVU Expansion Voice Unit 80's wavetable synth by Wolfgang Palm

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via this auction

"This is the "brains" of a PPG Wave 2.3: Classic vintage 8 voice wavetable synth; digital oscillators for complex waveforms; warmed up with rich analog filters [8x Curtis SSM 2044 VCF chips], designed by Wolfgang Palm, used by famously by David Bowie, The Fixx, Trevor Horn, Jean Michel Jarre, Art of Noise, Rush, Depeche Mode, Gary Numan, Robert Palmer, Psychadelic Furs, Talk Talk, The Cars, Ultravox, Steve Winwood, Rush, Stevie Nicks, Thomas Dolby, Pet Shop Boys, Mike and the Mechanics, and Stevie Wonder.

However the buyer should know:

This unit predates MIDI [was built between 1982-1984] and will require a technician to complete the build we started for the MIDI to EVU converter, as planned here: http://www.hermannseib.com/english/synths/ppg/midiretro.htm

All of the parts, veroboard circuit, and new OS ROMs are included."

more pics here

SN 01012 or 07072?


Update via Rich in the comments: "Just a short note of clarification:
The above mentioned Curtis SSM2044 was a combination of 2 different companies:

Curtis Electromusic Specialties, founded by Doug Curtis - made the CEM3340 VCO, (Roland Jupiter 6 and others if I recall correctly), CEM3320 VCF, CEM3310 ADSR and quite a few others.

Their biggest competitor was Solid State Microtechnologies by solid state music who made the infamous SSM2040 4 cell chip that was used for 4 pole Low Pass Filters, 2 pole State Variable Filters and a few other configurations. (Prophet 5 versions 1 and 2. Version 3's used the thinner sounding Curtis CEM3320.)
The Korg Mono/Poly and Polysix (amoung many other units) used the SSM2044 4 pole Low Pass Filter."