I'm working on building this circuit which is based on a "Fuzz" distortion guitar effect, and am wondering what the purpose of C3 is, connecting the two collectors of the transistors. Is it for some type of DC blocking between stages? Most other design schemes I've seen for this type of circuit don't have any connection at this point. Does the actual capacitance value matter much at this junction? Any advise or reference to a source where I could learn more would be greatly appreciated.
Circuit designed by Mad Bean Pedals