[sdiy] SH-3a VCO - how does it work

[Florian Anwander]

Hi René

thank you for the comprehensible explanation!

Am 20.04.20 um 11:20 schrieb René Schmitz:
> Most odd is the arrangement of Tr130 and Tr131, which appears to 
> either protect the capacitor from overvoltage, or is used as some very 
> crude voltage reference.
This circuit appears also in the CV mixer section. And I think I've seen 
it in some other Roland gear from the early period too.

Florian