Parsec kit

The Parsec Harmonic Enhancer is a filter/EQ pedal from the mid-1970s that was notably used by Frank Zappa, Joe Walsh, Les Claypool, Greg Lake and Adrian Belew among others. It uses a fairly straightforward state-variable filter to achieve its frequency boost. This type of filter was more often found in synthesizers and related gear, so it was an innovative idea at the time to use the concept in a guitar pedal.

This kit contains the PCB and all necessary parts. The enclosure can be selected, please select 4 knobs, up to 20mm diameter, for 6,3mm shaft separately.
Here is the bill of material: bill of material

This project is by Aion Electronics, in collaboration with Musikding. If you have any problems with the contents of the kit, please contact Das Musikding (Klaus).

Here is the direct link to the manual with layout and schematic:
Instructions