The Spectron is a full-featured envelope filter originally based on the Mu-Tron III with several modifications and additions.
This kit contains the PCB and all necessary parts. The enclosure can be selected, please select 6 knobs 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: