Rare 1978 BCD Technology Inc The Nebula Vintage Analog Guitar Synthesizer SN 000111

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via this auction

Pics of the inside below.

This is about as rare as it gets. I've never seen one before. There has only been one other post featuring the BCD Nebula for the document scan also featured in this listing.

Details from the listing:

- 1978 BCD Technology Inc The Nebula Guitar Synthesizer Module

- Super Rare Analog Guitar Synth Unit

- Missing Lid Cover Otgerwise Complete and in Very Nice Cosmetic Condition with All Sliders/Knobs Present & Intact

- Works, But General Service Recommended with PS Section Likely Needing New Caps ASAP

- Can Safely Ship Worldwide!

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1979 BCD Technologies Guitar Synth Ad

via Retro Synth Ads where you'll find the full write-up.

"A new company has entered the guitar synthesizer/processor market, BCD Technology, Inc. (285 K Sobrante Way, SunnyVale, CA, 94608 - tel (408) 739 2880). Their product, the NEBULA, makes extensive use of the SSM chips designed by Dave Rossum and Ron Dow. The guitar signal is processed directly (no hex pickup, no PVC) and is modified by way of: an input processor (consists of compressor, fuzz, and octave divider/multiplier), a VCF, a VCA, envelop generators, and a parametric equalizer. List price is $795 + options"