On Sun, Nov 17, 2024 at 05:08:44PM +0000, Oren Leavitt via Synth-diy wrote: > Yep! The op-amp filter (IC2 a/b) inputs are swapped in the PDF article. The positive feedback making them act like comparators with hysteresis. > That sure would give you some clipping though. -- Gordonjcp MM0YEQ