Features Four oscillators with independent controls and outputs Saw, Triangle, Ramp variable shape output Pulse output with variable width Rise rate pot and CV input Fall rate pot and CV … Read More

I noticed a discrepancy of resistor values on the Large Tetrazzi silkscreen and graphic at the spots where the Upton/Donton and Upmod/Dnmod controls attach. All of these come through a … Read More

I built up a part of the Tetrazzi circuit for test purposes. Only the core VCO part were installed, around the 4051 switch and the TL082 op amp, plus the … Read More

It can be hard to find just the right Eurorack modular case. I’m picky about the power supply and distribution. Most small, powered cases don’t have the kind of power … Read More

After posting about my old Telequipment D66 scope, I began looking around for a brand new, up-to-date oscilloscope for my DIY work. I decided on this Rigol DS1102Z-E. I chose … Read More

I took apart my old oscilloscope to have a look and clean it up. I had inherited this ‘scope from my father-in-law, and it’s served me quite well for years. … Read More

The first petal is built and tested! This is the PCB made by Josh Rodriquez. It’s populated with parts values matching the real Quantussy in my Cocoquantus v1. I’ve added … Read More

Years ago, I had realized that 800ma of 15V was not enough for all the MOTM modules in one Dot Com walnut cabinet (26U). At that time I upgraded one … Read More

The Power-Ones that supply power to my MOTM modules are getting older. This HCC15-3A, the largest, has a warranty label of December, 2003. I thought it was past due to … Read More

I have six or seven Eurorack cases, of all different sizes. The largest is a 9U, 104 hp case that stays in the studio most of the time. Then I … Read More