Are we talking about the oscillator bleeding into other pedals (like when the Nutty Fuzz is bypassed) or more like a gate that kills the oscillator when you aren't playing? (I suppose one solution would solve both problems)
Take a look at the Cordyceps schematic, it uses a simple opto based gate to mute the carrier signal when you stop playing.
EDIT: Well, you know, it would help if someone would
post the damned schematic. Give me a just a bit.
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