Multimode Diode Filter
Multimode Diode Filter based on the Steiner-Parker VCF
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.
http://www.elby-designs.com/contents/en-us/p357.html
Available as an assembled Module and as a DIY project.
No info about availability.