Message
Re: Doepfer A-131 exponential VCA - calibration procedure
2019-02-21 by man.of.mystery@ntlworld.com
What I mean is, the response curve of this one, for gain vs CV, is far from desirable. I get a very gradual increase, then a very sudden one. I haven't attempted to graph it.
I have seen that website page before, and read the manual, but I haven't seen anything official about adjusting or calibrating one. I have read that there are preset pots to adjust, but only vague details.
It seems the one I have is version 3, and there are only two presets / trim pots, labelled Gain Offset, and Output Offset. Is there anything to be gained by adjusting those?
I own multimeters, basic oscilloscopes, soldering irons, and a large heap of resistors, capacitors and various other components. I am quite prepared to modify it, if necessary. Is there a schematic available?
- Andy