The silver mica 220pF capacitors arrived, substituted and failed… Still no response. Only random noise (if it wasn’t random. it wouldn’t be noise, would it?). So the only thing that remains to be done is to follow the schematic and have the soundcard probing various positions on the circuit so I can see (hear) where the signal ends.
Ray Wilson from musicfromouterspace.com has a nice article on using your sound card as an oscilloscope and I use http://zeitnitz.de/Christian/Scope/Scope_en.html for display
(Ray Wilson’s article is here)
Hi, did you find the error? I finished a Yusynth VCO but none of the waveforms work (I managed to get a blurry 5Vpp square wave from the square output once but it disappeared again) Thanks!
Hi Seb,
unfortunately I haven’t and it has been quite a long time since I tried. I think it was my bad PCB printing though.