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 negative slew module:

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

Note that there are a 1M and 120p capacitor wired in parallel in two locations, as marked 1M||120p.

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

Classic Serge