PCB Grinder Symmetrical FET Compressor

Projects > PCB Grinder Symmetrical FET Compressor

Perhaps a more novice-friendly 1176-style build than others, PCB Grinder’s Symmetrical FET is an adaptation of the Urei 1178 stereo FET compressor. The circuit has a topology similar to the 1176 Rev G in its placement of the FET stage and use of an NE5532 balanced input stage, however it departs in its use of ICs for the pre and line-amp stages, allowing for a lower-noise, cleaner sound than what is characterized by other variants of the 1176. Additionally, the layout has been re-arranged to enable easier building and troubleshooting.

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  • Stacked potentiometers allow controlling both channels simultaneously
  • Includes all passive components and PCBs, excluding output transformers
  • +/-18V power supply is included on main board, builder must only source power transformer


  • N/A

More Information:

  • Board no longer available from PCB Grinder, replaced by the MS76 project.