
via this auction
via bluelantern:
"This is my new Diode Ladder filter. It has an 8 Stage 1N4148 Diode Ladder. It sounds very nasal and vocal. I built and had the PCB CNC made for me.
The resonance is very stable and does not screech or suffer from scratchy pot syndrome. It has a LP, BP, and HP input. There is a FM Bi-polar input also.
The module is Euro Rack standard size. It has a surgery green color panel made of Aluminum. I calibrated the Cutoff range under a 12v Powersupply. There is a Trimmer that can change the cutoff range to your liking."
bluelantern on eBay
Diode004 by Blue Lantern