Doepfer VCO

[Tim Cockram]

Doepfer have the "service manual" for thier 110 vco on line@  

www.doepfer.de/a110_tec.htm

It's quite interesting.

The octave selection is clever (a bcd switch with 3 reference currents
derived from R, R//R and R+R)

I bought a "RS Integrator" VCO which was claimed to be of higher quality
but the circuitry (I drew the schematic before plugging it in, sad) IMO
is not as good an engineering solution as the a110.  Having said that
the Integrator vco does it's job.

May be I'm more engineer than musician but I do like multiturn presets
for setting scaling etc.

Regards 

Tim
  
-- 
Tim Cockram