12V double regulator (CB8810E)

We found this circuit in a 1966’s General Electric documentation. The circuit uses diodes in unique GE packages, available at the time.

| Clique na imagem para ampliar |

Differential Light Sensor (CB11589E)
This circuit detects light variations using two LDRs as sensors. Operational amplifiers and...
Power Relay (CB14815E)
The circuit shown consists of a power stage for relay excitation. 2N3053 can be a BD135 and 2N406...
DC amplifier with transistors (CB21819E)
This circuit was found in Mullard's 1960s transistor manual. The circuit uses germanium...