Hello Ken and all.
I've constructed the cgs 64 VCA.
The thing is that an audio signal in the input can not be gain zero. I adjusted the CV INIT trimmer but the signal doesn't disappear. I could more or less perfectly eliminate the CV signal in the CV input by adjusting the trimmers, following the set up instruction.
One thing I haven't done is that I used unmatched 548s, but don't really know how much it affects to.
I've used a 2SC 2559 for the Dual transistor.
It would be very helpful if anyone could give me a clue.
Thank you very much.
Fuyuhiko