> One of my A111s has a strange behaviour, the PW control works as
> expected up to 12 o clock then after that it starts to increase
> the VCO frequency.
> Any ideas

That's indeed strange. My only idea is a faulty power supply or a defective
CEM3340. The A-111-1 generates internally +10V and requires a +12V supply
(e.g. 11.5V would not be sufficient). Please contact Matthias Marass
directly (keyboards (at) doepfer (dot) de). He is responsible for the final
check, adjustment and service of the A-111-1.

Best wishes
Dieter Doepfer