This board is for a CMOS fuzz topology popularized by Craig Anderton’s Tube Sound Fuzz from the mid-70s. The board uses a new design with old-school traces on phenolic substrate for an era-appropriate look. Phenolic boards are found in many vintage electronics before the use of fiberglass became common.
The circuit is based around a CD4049 CMOS hex inverter and was also the basis for other fuzz designs, including the Way Huge Red Llama. The board fits in a 1590BB.
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