-- Click on a picture to enlarge it -- Here's the Schematic for the CH-1. The top diagram is the bare circuit. The lower diagram shows t...

Taking apart the CH-1 is easy and its sophisticated design is actually easy to disassemble for modifications. There are four screws on the b...

The Input Drive mod changes the gain of the input filter. The second stage of the circuit is the input filter which is a lowpass filter prep...

The Output Drive Mod is based around the output summer/amplifier consisting of IC5b and the surrounding circuit. R56 controls the gain of th...

The LFO Mod is certainly the most interesting. This mod allows the normal triangle wave LFO to morph into a sawtooth wave as you turn up the...