Dual Yusynth Filters Demo

YouTube via davidryle | Feb 27, 2011 |

"Yves Usson's Minimoog transistor ladder filter module from a Bridechamber.com kit.
Two different component builds. One with the 2210 transistor arrays and the second with three pairs of matched BC547 NPN's. They sound similar but the calibrations may be a little off in relation to one another. The 2210 transistor array sounds smoother to me. The discrete transistor pairs sound thicker in the resonant ring. Probably due to the slightly less matched pairing. All caps are within 1% in the ladder but each module contains different vendor parts for the capacitors.
The front panels are different too. The left module is silk screened graphics, and was bought used. The right module was engraved with a high speed CNC milling machine in my shop. The font is not the best but I plan to improve on it for future projects.
Running these modules in parallel is really interesting. I have another video I made of that. I'll post it later. I can't really say whether the clones are truly close to a Minimoog filter or not. I don't own one and it's been years since I've played one. Also there are different makes of Minimoog so the filters all don't sound the same exactly anyway. Regardless, I think these filters sound very good and am pleased with the build. Yves is quite a good designer and I feel fortunate to be able to use his design here.
The left module with the 2210's is a component and PCB kit from Bridechamber.com. The right module was just the PCB from them but I rounded up all the components. Thanks to Scott Deyo for rushing these kits out to me. This was a real fun project and great learning exercise."