The Aurum Overdrive is discrete op-amp overdrive. It is using two JFETs and a PNP transistor to create a variable gain stage that can be controlled like an op-amp but clips gracefully when overdriven.
This kit contains the PCB and all necessary parts. The OD-2 or OD-2r version can be built. The enclosure can be selected, please select 3 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). Since the modifications require some basic knowledge, this project is rather for more experienced builders.
Here is the direct link to the manual with layout and schematic: