Mr. Bill wrote:The positive ground is due to the PNP transistors, no different than a PNP Fuzz Face. When you re-assemble the inductor, note that the top part of the core twists to adjust the inductance value. You will probably have to adjust it by ear once the pedal is working.
Well it only works because this is a stand-alone entity running from a battery. You certainly wouldn't want to chassis "ground" a 9V wall adapter's positive terminal unless you're very sure that there is no earth ground reference cause once you plug into your third prong powered amp through the pedal, currents gonna flow. Likely not dangerous, but bad things might happen.
There's no reason why the ground side couldn't have been switched rather than the 9V side....I've just seen the ground side switch as a lot more common. In fact, the second gen Fender Fuzz Wah with the two opamps used ground side switching. I figure this was the result of some ECL logic design that would have been popular at the time.
Concerning the inductor, how does adjusting the coil radially affect the inductance? I saw two (what I presume) were two ferrous cores in the middle, but they looked fairly monolithic to me. Are they different? The insulation on the wires coming out of the inductor core are pretty stiff (from age) and I really don't want to bend them that much, so knowing what I'm doing before I adjust it would be helpful. A blow dryer should help with bending the wires too.