The Serge Dual Universal Slope Generator may have achieved more renown than almost any other 1970’s era Serge module.  Ken Stone of Catgirl Synth makes the PC board.  See CGS … Read More

Quantity: 2 The Serge Dual Negative slew is one of my favorite 1970’s Serge modules.  Ken Stone made the CGS 82 PC board. The output tracks the input and gives … Read More

The CGS Serge panel had room for one small module, so I added this little mixer.   The simple design provides two attenuated inputs, plus a bias offset pot with a … Read More

My current project is underway. The panel was completed today (click the image for detail), but it’s only a facade. Behind the panel it’s empty. All of the modules are … Read More

The MOTM Modular is 5U with 1/4-inch phone jacks for patching. The Cocoquantus has screw heads for alligator clip patching. For patching between these I have made up some simple … Read More

After I received my Ciat-Lonbarde Tetrazzi Organ, I spent a lot of time delving into its design.  I wanted to understand it as well as possible in order to be … Read More

Quantity 1 Here is a DIY Mattson Mini Modular VCF in a MOTM panel.  George Mattson’s description: 4-Pole, 24dB/Octave State Variable Filter jointly designed by Synth DIY guru Jim Patchell … Read More

Quantity 2 Tony of Oakley Sound keeps updating his modules.  See here for his latest description of the famous ADSR-VCA. Though I already had four of the earlier revision 2 … Read More

Quantity:  1 Dual VCO This is a circuit of my own, based on the XR-2206 VCO data sheet examples.  Features: Coarse and fine frequency controls Low/High range switch Sine/Triangle switched … Read More

A 1U Dual Mixer in matrix configuration This is a DIY mixer designed to save space in a portable cabinet.  It is based on my 2U DIY Matrix Mixer.  The … Read More