Hi John

> Does anyone know if there is any way to mod the VCA on the A-107 to
> reduce the noise level

To my knowledge the A107 is using a Curtis Chip CEM3372 which integrates
VCF and VCA.

If you are knowledged in measuring signals, you might check at pin 17
whether the VCF signal itself is noisy already. pin 12 is the VCA input
pin 14 is the VCA output. There should be a buffer opamp after the
output, which might be noisy too. In theory you might skip the VCA, by
connecting pin17 directly to this buffer, and use an external VCA.

To avoid noise at the VCA, you should assure to feed a full signal level
to the VCF input already. And keep in mind, that some filter settings,
which reduce the energy of the signal (Bandpass), will provide lower
signal levels to the VCA.

Florian