1982 CLEF Microsynth B30

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via this auction

"Super rare vintage analog synthesiser from the 80's.
Originally DIY kit from Clef Electronic Music in 1982.
Military class electronic circuitry.
Original operation manual included.

Like semi-modular synth (MS-20, etc.) expect patch has been replaced by switches.
Works in 1/3rd octave / 1 volt which makes its tuning pretty unique.

Everything in working condition."