Elby Designs Synthacon filter. Fully built module.
This module is a "tribute" module, based on the awesome Steiner-Parker Synth VCF. Its sound is quite unlike the Moog ladder, has a lot of character. Resonance is a bit unusual in its behavior. Once it starts oscillating, the resonance pot needs to be backed off a fair way to get it to stop again. It can also be frequency dependent. This module includes an input mixer.
Module Width: 15HP
Power Consumption: +12V @ 15mA, -12V @ 15mA
Module Depth: 8.5cm