I wrote this post earlier but didn't pin it up...
Then I saw on the schematic that the wah pot was 50k so I thought I'd strap a 100k resistor across mine and see if it made a difference before bothering you guys with the above. Before I even got a chance, the problem had gone. I've tried fiddling with the wires to see if I had a loose connection somewhere but I can't make it oscillate again. Now I'm really confused. I don't want it to happen again, in the middle of a gig for example, so any ideas what might have caused it?Hi folks,
A couple of years ago I got my hands on one of those 70s Shin-Ei fuzz wahs with the Super Fuzz circuit inside. It was in poor shape, the wah pot was goosed and so was the fuzz 'pitch' selector.
I've replaced both but it's oscillating. I maybe left it too close to my Keio Synthesizer Traveler and it's trying to copy its older brother. It's still wahing, and the oscillation pitch changes as you'd expect as you work the treadle.
I originally tested this thing when I got it and ordered the new wah pot at the time. I had to file the bracket cos the shaft on the new one was a bit wider so it sat waiting for 2 years to get done. Now I can't remember if it was doing the singing thing with the original wah pot - I think not though.
There is some bleed through of the oscillation when the wah is disengaged.
I'm sure I soldered the new wah pot in the same as the old one. The old measured 126k and the new 94k but obviously they both sweep over roughly the same range so that can't be the source can it? If it isn't, I have no idea what is as it's the only thing that's changed. And the old one was kaput so might it measure something weird anyway?
If the wah is oscillating then there's probably too much resonance yes?
Thanks for any help.
