[sdiy] unknown synth pcbs

[Ingo Debus]

> Am 04.02.2023 um 22:43 schrieb Peter Pearson via Synth-diy <synth-diy at synth-diy.org>:
> 
> What does "sei" stand for I wonder?

Ha, found something! :-)
There was an „Ingenieurbüro Seidel“ back then, and they sold kits, including a „VCO-Modul“ (with 2033) and a „4pol VCF-Modul“ (with 2044). I still have some ads from them, but no pics, unfortunately.

Obviously they still exist, but don’t make synthesizers anymore:
http://www.ulfseidel.de/html/firma.html <http://www.ulfseidel.de/html/firma.html>

Ingo
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