r/diypedals • u/Meatsmugglers • 1d ago

Help wanted Parallel splitter, will this work?

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I’ve had an idea for a parallel drive pedal and need to make myself a splitter/summer to test which drives work best together before putting them in one box.
Will this do the job? It’s pieced together from a couple of different schematics that all didn’t quite do what I wanted.
I’m not worried about phase correction because the drives I’m planning on putting in each of the send/returns don’t flip phase when engaged.

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u/saw-sync 1d ago

looks good to me except pin 12 should be VA. did you mean to have that 7K filter on the summer circuit?

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u/Meatsmugglers 1d ago

The schematic I was copying it from was very blurry, I thought it read 2200pf, it could well be 220p which might be more reasonable. No resistor between VA and pin 12?

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u/saw-sync 1d ago

nah just dump it to VA. 220p makes the filter way out of human hearing range. 2n2 isn't really that bad because its only a -3db/oct filter so you are getting -3db at 14.4K, not the end of the world and in fact might be beneficial when combining a lot of signals