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 Bi-directional Router module:

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

PCB connections:
A = A1/A2 select input (1)
C = A2 (1)
B = A1 (1)
D = B (1)
E = A1/A2 select input (2)
F = A2 (2)
G = A1(2)
H = B (2)
I = A1/A2 select input (3)
J = A2 (3)
K = A1 (3)
L = B (3)
X = +12v
Z = -12v

There were extensive errors on the jack wiring marking of this module.

Classic Serge