Written by knopsl

MS-20 Filter – LMNC layout

This is one of the most built filters and one of my most hated builds ever. I once bought waay too cheap 13700s on AliExpress and tried to build several VCAs and VCFs with them (FIVE!!!} and NONE of them WORKED. Then I gave up on OTAs. Months later I thought I’ll give it another go and bought a fresh batch of ICs and looked for a straight forward build. I found this and it worked right away. Source

I probably could’ve used a slimmer panel but you know how it is…
I used the following layout as a base for my build. I tried to use less space on the board for the components to have enough space for extra pots. It worked out nicely. The original layout starts after the blue line and all pots have cuts on that line where necessary.
Layout I used
Only stripboard without wiring
Version with HPF switch
schematic it is based off of – from schmitzbits
Found this, seems useful to compare schematic with layout
After writing this post I had to build another one 😆