> I built my own power supply. It's got plenty of current for my
> small system. I only have one oscillator, an A110, and the pitch
> slowly drifts up and down. I've disconnected all the other
> modules and it still does it. It's small enough that I really
> don't care; the way I use this stuff, tuning is a lesser
> priority. I was wondering if that slow fluctuation could be
> caused by poor PS regulation.

A good voltage regulation is essential for stable oscillators. If the supply
voltage fluctuates this affects the VCO pitch. There is an additional
voltage regulation on each VCO module but it does not compensate all supply
voltage fluctuations.

Best wishes
Dieter Doepfer