CEM trouble.

[BJ]

Yester day.. all my trouble sems so far away...

The CEM VCO, LFO interference problem are solved.
Last night i made a new power supply design, and now
everything works fiiiiine.

This supply board has a separate Regulators for the VCO module
3 slot for 9 VCO's. (LM317/337, fairly god ripple noise rejection 80dB)
And a 17 slot section with 7812/7912.

Have tested the unit with 6 VCO,(3 discrete and 3 CEM 3340) and
2 LFO's and 2 S/H.

My recomendation : use separate psu for VCO, or as CEM master said
use a separate constant current sources.

Annyway it was a suprise to se that more people then I had come across
those type of interference problems. 


Greatings from  the vocoder Master.
BJ.