Electronic motor control (T1310E)

This circuit with tubes was found in Radio Craft magazine of August 1948. The circuit uses power tubes serving to control small power AC motors.

Darlington Conventional 6N13 (CB1557E)
In the figure we have the configuration of the circuit as a conventional Darlington. In this...
Low Power CMOS Alarm (CB4779E)
We found this circuit in a 90's Radio Electronics. The low power circuit activates a 12 V relay...
10 W-Transistor Amplifier II (CB998E)
We found this amplifier in a 1990 documentation. The transistors are common, having been made...