AW: VCO-1C

[BJ]

jhaible wrote:

> 
> What I have in mind is a VCO bank like the Korg VC-10 has it. A simple
> linear, thyristor-based VCO per key, and a resistor string to apply LFO
> modulation with slightly different strength to each VCO.
> start collecting information about such instruments and their VCOs.
> Any VC-10 owners: How stable is this thing ? (the internal VCOs)
> Any Korg PE-1000 and PE-2000 owners: Do these instruments really have
> individual VCOs, or are they divide-down units ? (I don't have schemos,
> and what I heard about these instruments is contradictory.)
> Any other instruments with individual VCOs ??


Talking about old Korgs, is there any one besides me who like
and use the MS20, JX3p VCA design?

Have any one done any serious measurements between a CA3080
and this transistor OP amp VCA.

Some history:
If i can remember this right, the UJT VCO was a swedish invention
back in the 50/60's and then was the basis for the design of the
4151/331 IC.

BJ