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The circuit is no preamp.
I spare me OPAs for other parts of a pedal; input and output buffer can be easily done with an emitter follower; it's enough hi-Z for the guitar pickups and fairly low-Z to drive every realistic load in that environment
two 22µF electrolytic capacitors in series back-to-back.
easily done with an emitter follower
Quote from: Hero999 on September 15, 2018, 06:46:01 pmtwo 22µF electrolytic capacitors in series back-to-back.Is that the two positive sides connected?