The ZiRCONiA is an optical compressor using a VTL5C3 vactrol (or similar), that includes a tilt style EQ, external EQ-bypass toggle, and internal Hi Cut switch. This compressor has a very smooth sound that doesn?t significantly color tone, while adding fullness and sustain.
The dimensions of this pcb are mm 83mm x 58mm. This pcb is included in the ready to solder kit:
This project is by Lectric-fx. Since the modifications featured in this project require some basic knowledge, this project is rather for more experienced builders.
Here is the direct link to the manual with layout and schematic: