via this auction
"Brand new. Highest quality parts available - no compromises. Artfully hand wired.
You are bidding on a Yusynth Diode Ladder VCF. The Yusynth Diode Ladder VCF sounds incredible. I love the brassiness you can get with this filter. The voltage control of the resonance is a great feature. Another vintage filter design sweetened by the synth guru Yves Usson.The Yusynth Diode Ladder VCF is a wonderful addition to every cabinet.Here is some information about the Diode Ladder Filter from the Yusynth Website:
"Well, here is another classical and very special filter based on the EMS diode ladder filter!
This filter has a sound of its own and is the signature of the classical Pink Floyd's song "On the run".
My aim here was to design a quite faithful copy of this mythic filter while using components that minimize the burden of selecting a great number of matched transistors. This is why I used transistor arrays (CA3046, CA3096). However, because the CA3096 has become a rare part and is now overpriced, I have also designed a PCB with discrete trannies to replace it. As for all the other filters of my YUSYNTH project, I have added an input and an output buffer to adapt this filter to the input and output levels of my modular system.
I also added an input for voltage control of the resonance : everything was there in the original module but was not made available, probably because of the limited size of the patch pin matrix of the AKS/VCS3...
Because, my power supply standard is +15/-15V, I have included a power regulator IC (78L12) to convert +15V to +12V and a single transitor voltage regulator -15V to -9V (I wanted to use a 79L09 but changed my mind when I realized that this voltage regulator is quite a rare part and is difficult to source)." - Yves Usson
Assembled with:
Frequency Control
Resonance Control
Input 1 and Input 2 Level Controls
Frequency CV Level Control
Resonance CV Level Control
2 Audio Inputs
1V/Oct CV Input (not musically accurate)
Freq CV Input
Resonance CV Input
Audio Output
Switchcraft Jacks
24mm Alpha Pots
Military Grade RG-174 Coax Cable Used on Audio Signals
Polyester Film Capacitors
Metal Film Resistors
Double Plated PCB with Soldermask
MOTM Power Connector
Runs on +/- 15 Volts
Hand Signed and Numbered
THIS MODULE IS FOR EXPERIENCED SYNTHESIZER ENTHUSIASTS ONLY! If you don't know how to use this module, please don't bid."
