Catalyst Audio

The model 110 is 4 independent transistor based voltage controlled amplifiers behind one panel. Each VCA (or “gate” in the original terminology) consists of an audio input with an attenuator, a CV input, and 2 outputs. The VCA’s are AC coupled - meaning that they will not pass slow (or static) control voltages. The VCA’s are calibrated to unity (an input of a 10v peak to peak audio wave, will produce a 10v peak to peak audio wave at output) when 5v is applied to the CV input and the attenuator is at approximately the 3’oclock position. 

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The Model 110 (Like all 100 Series Modules) is based off of designs originally pioneered by Don Buchla while working with the San Francisco Tape Music Center.

 

Notes: Unlike the later (and better known) model 292, the original low pass gate - The model 110 is entirely transistor based (rather than vactrol based like the 292), and is much faster.