Ken Stone/1973 classic Serge/Serge envelope generator

The following info on the 1973 variant of the Serge envelope generator module is presented for educational/historic purposes only and are not to scale.

Construction
PCB connections:
 * A = start input
 * B = Window pulse output
 * C = envelope output
 * D = End pulse output
 * E = cycle input
 * F = Hold input
 * G = Duration CV
 * H = Window size CV
 * Q = not used
 * U = not used (0v)
 * W = 0v
 * X = +12v
 * Y = +6v

CC-BY-NC
Readers are permitted to construct these circuits for their own personal use only. Serge Tcherepnin retains all rights to his work.