OK I am stumped. This is my 2nd xox, my first went really smooth.
It seems on the verge of working. I've got a perfectly working xox to compare with, I've gone over the joints, checked and re-checked transistors and caps, checked for shorts, pulled chips out and checked for bent pins, etc...I'm really stumped as I have my first xox really modded out and had to troubleshoot it many times, but never got stuck like this...Have a feeling it's something dumb/simple but I don't know anymore...
Setting to random mode for testing, i have clicks and can hear the resonance creating a sort of whispery sound as well -- but you can't really hear the VCO's..Very, very faintly, you can hear the saw.
If I poke around in the VCO section just probing connections, the saw gets louder when I poke the legs of, for instance, Q25 and Q27.
It sounds exactly the same if I unplug J6 and J7.
I'm not knowledgeable enough to have any confident leads...wrong resistor somewhere in the VCO? or is this a problem in the VCF?
Any help deeply appreciated!