A while ago i build a the etherwave schematic. Everything is working except for the volume regulation. The volume oscillator build around L11 and L14 is oscillating at +/- 500 kHz. i can alter that frquency by turning the 5k volume pot or L11, but the volume dous not change. I can controle the volume by manipulating the tension directly on the vca out pin so i know the lm13700 is working properly.
What could be the couse of this problem?
Also can someone explain me what D1+C12 and D5 are axactly doing in this sircuit?