hi Sean

> I'm trying to modify my old style A-131 Exp. VCA module to get a
> gain >1 as the output often seems weedy and I would like the option
> of a little (or a lot of) overdrive.
>
> I'm guessing that I can do this in 2 ways:
> 1. change the resistors connected to the audio In pots to a lower value.
> 2. change the resistor connected to the output voltage of the CV circuit.

I think the VCAs OTA is not the place where you should change the level.
Usually a change of amplification should be done by decreasing the
feedback resistor of an OpAmp. As far as I remember, the old A131 with
the Curtis CEM3382 does not use an separate buffer stage at the output
(thats where you might do this). So I suggest to modify a Mixer A-138,
where you could change either the feedback of the summing amp (to
amplify all four inputs), or change the input resistor of one channel.

Florian