PCB Grinder

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From the ever-prolific one-man operation at PCB Grinder comes a modified, and highly functional take on the classic FET compressor design. It adds a “Dirt” control, longer attack times, and uses an IC-based input stage rather than a transformer (retaining a Lundahl 5402 as an output transformer). The kit includes all components needed, with the exception of a power toroid and enclosure.

FET Grinder Features:

  • Control layout mirrors original, with added “Dirt” control
  • NE5532-based input stage, Lundahl 5402 transformer-based output stage
  • Simplified design for an easier build


  • n/a

More Information:

  • View schematic and layouts (includes self etch friendly layout)
  • Discontinued from PCB Grinder (replaced by MS76 project)