80-4A

 VC Mixer

The 80-4 is a voltage controlled linear four channel mixer with master gain control. Based around three CEM 3330 Dual VCA's to provide a simple low noise unit. Signals may be panned between the two outputs both manually and using a CV via the pan input. An LED indicates the peak signal level. The 4A version differs slightly from the original in that the linear control compensation for the drive of the 3330's was improved, together with a few component upgrades to reduce CV feed through and increased gain factor.
Controls Inputs Outputs
Level 1 Input 1 + Control 1 Left
Level 2 Input 2 + Control 2 Right
Level 3 Input 3 + Control 3
Level 4 Input 4 + Control 4
Pan Pan CV
Gain