4U038 - Phaser

4U038 - Phaser

This PCB is a variation on the classic, well known phaser module.

From the original, 1982 catalog:
"The VC Phaser (PHA) is perhaps the lowest noise and lowest distortion phase shifter available today. As an aid to recreating some of the subtle properties of phase delay in acoustic sounds, three separate outputs are provided with 360 degree, 720 degree, and 1080 degree of voltage controllable phase shift. A MIX output combines the 1080 degree phase shift with the input signal to produce the multiple notch filter effect that is usually associated with phase shifters. The VC Phaser's log-conforming characteristics and the manual and voltage controls enable ultra-smooth, precisely centered sweeps of phase shift for both spatial effects and timbral modification."

Note that the raw 360 degree, 720 degree, and 1080 degree do not provide the classic phasing sound. They must be mixed with the incoming signal for this to occur. The MIX output does this onboard with the 1080 degree output. 

1.6 mm thick, double sided, green
base material FR4-Standard TG 135-140
surface finish HASL
part values are silkscreened

no parts, just the PCB - LW format panel is available

Documentation (schematic, bom, wiring)