I have a CGS-83 Dual Positive Slew, version 1.0, built into my Serge/Bugbrand blue panel rack. I was looking at Prism Circuits and discovered that several versions of the dual … Read More

I upgraded my CGS29 Wave Multiplier from board rev. 1.0 to 2.2. The v2.2 PC board is available from SynthCube. Turned out I had all the needed parts and could … Read More

This 5U panel contains three CGS PC boards. Serge VCFQ The VARIABLE Q VCF (VCFQ) is an excellent general-purpose VCF offering simultaneous low-pass, high-pass, band-pass and notch (band-reject) outputs. The … Read More

This 5U panel contains three CGS Serge PC boards. Two CGS 76 Serge Envelope Generators One CGS 88 Triple Bi-Directional Switch Serge Envelope Generator It’s an early Serge design that … Read More

This 5U size panel houses three CGS Serge PC boards: CGS 83 Dual Serge Positive Slew CGS 92 Serge Smooth and Stepped Generator CGS 97 Noise Source Dual Positive Slew Sending … Read More

One of a set of five panels, comprising a set of CGS modules, mostly those replicating 1970’s era Serge designs.  This panel contains: Serge Resonant Equalizer Serge Phaser AC Mixer … Read More

This panel is one of five that comprise a set of modules from CGS.  It contains three different functions: A group of four passive attenuator pots Two CGS 64 VCA … Read More

Here is a wide range, non-precision, and somewhat unstable voltage-controlled oscillator (VCO) with just a pot for initial frequency, a CV input attenuator, a triangle (-0.5 to +4.5 volts) and … Read More

The CGS Serge Wave Multipliers is the fourth and final module in my CGS Serge banana jack panel.  Please read Ken Stone’s CGS 113 notes. The board contains three independent … Read More

This is my take on the legendary Serge Smooth and Stepped Generator (SSG).  I received the SSG PC board as a compliment from Ken Stone, who designed the board.  The … Read More