I built a nonlinearcircuits Spasm, a.k.a. LDRJerk. It’s a Sprott jerk chaos circuit controlled by a DIY 7-way vactrol. This is the first SMD (Surface Mounted Device) project I’ve done … Read More

VC Fixed Filter with Distortion and Feedback Zlob Modular F3DB can be ordered assembled or Do It Yourself. I suggest going to the Zlob site to read the full description. … Read More

In a previous post about the Test Bench Rack I received helpful comments from John Loffink, who had also refurbished the same Pittsburgh Modular power supply board. He educated me … Read More

I had a pair of rack end pieces left over from a previous rack project. And I also had a power supply left over from that same project. All I … Read More

I use a lot of Sample and Hold modules. They are an essential component of a Quantussy Cell. It is hard to find simple sample and holds, those without a … Read More

I noticed a problem with the DIY Quantussy right after I finished it. Chaos wouldn’t go all the way to zero. There was always a bit of cross modulation in … Read More

A few posts back I described an experimental VCA, based on the AVDog circuit by Peter Blasser in the Plumbutter. Our friend crucFx (Josh Rodriquez) offered to make a PC … Read More

I came across a used Pittsburgh Modular Cell 90 Eurorack case with a Tiptop Audio uZeus power supply included, for a very good price. I couldn’t resist. I already have … Read More

This box contains one HBB15-1.5A power supply. I recapped the supply (replaced all the electrolytic capacitors), as I had done for the MOTM cabinets. The caps on the MOTM-900 were … Read More

Another Ciat-Lonbarde PC board from crucFX, a.k.a. Josh Rodriquez, with circuit design by Peter Blasser. Dubernator is a dual bandpass filter, highly resonant. It features two identical, independent filters, each … Read More