Diode Ladder VCF - PCB/panel set (8HP)
3 in stock.
THIS IS A PCB/PANEL SET - THE PRE-BUILT MODULE IS NO LONGER AVAILABLE
Think of this as the bigger, uglier sibling of the MS20-style YAMS filter - it's bigger, badder, squallier and has voltage-controlled resonance too.
It's built around the really rather splendid LM13700 operational transconductance amplifier. There are also a lot of diodes (14 of them, to be precise).
Eagle-eyed viewers will notice a pair of trimmers on the back of the board - these control the cutoff offset (response when cutoff pots are fully CCW) and the V/oct response for the cutoff frequency. Out of the box you may need to tweak these until you get a response you like.
Works best with square or saw-based waveforms.
You can get a BOM and schematic at https://github.com/yorkmodular/diode-vcf
This is a PCB/panel set - it is up to you to source appropriate components and do the build. The build itself is relatively straightforward; the one surface-mount component (the LM13700 OTA) has been pre-soldered for you.