The following are presented for educational/historic purposes only and are not to scale. These designs are copyright Serge Tcherepnin.

Some info on the 1973 variant of the positive slew module:

• overlay and pcb pattern
• pcb pattern
• photo/overlay

PCB connections:
A = VC (1)
B = input (1)
C = start (1)
D = sustain (1)
E = output (1)
F = pulse out + (1)
G = pulse out - (1)
H = VC (2)
I = input (2)
J = start (2)
K = sustain (2)
L = output (2)
N = pulse out + (2)
M = pulse out - (2)
U = not used (0v)
W = 0v
X = +12v
Y = +6v
Z = -12v

Please note that the F and G, and N and M outputs may be swapped (e.g. G to F). My original panel has the original labeling crossed out, and the locations swapped, but due to other wiring errors I cannot be certain if this was a constructor error, or a panel marking error. I will resolve this when I eventually power the thing up again, or get a circuit diagram.

Classic Serge