Wednesday, December 11, 2013

EHX IC Big Muff V5 '78

Javi mentioned on the original IC BMP post that the original 2 ICs instead of the quad used in that layout make the circuit sound a lot better. So i thought i'd draw up a layout for '78 tone bypass switch version with two opamps. This way one can build a clone that's closer to the original and/or try out different opamps for it. It is per Analogguru's schematic which has couple of notes on it. First of all, the sustain connections are tweaked to function better. Both can be easily be modified per original on this board. And then there's a note for 820K resistor from supply to IC2 pin 3. That resistor needs to be 1M if you want to use TL071 or similar FET opamps for IC2.




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