Hi,
I haven't found any layout for this great vintage wah on any sites. Would be very happy if you guys could make one. But there are various schematic on the internet. Do you know which one sounds better? I prefer the one that sounds like in this video:
http://www.youtube.com/watch?v=Z7m__AUkrJAThis one has extra 100k resistor:
Below is wah-swell. I'm not very sure whether this wah is designed for guitar or organ:
Many thanks for all your help guys. This site ROCKS! :)