High Voltage Regulator (CB14440E)

This circuit was found in the 1972 RCA Power Transistor Databook. Transistors are uncommon today, but the circuit can be assembled with equivalents.

Crossing Signal For Railroad Modeling 3 (CB3856E)
This circuit uses two sensors that are placed at the intersection of a miniature railroad, causing the LED...
LM393 Zero Crossing Detector (CB4484E)
This zero crossing detector is of the 1993 Motorola Linear Interface ICs. The source is...
Power supply for amplifiers (CB8845E)
Recommended by 90s a Radio Electronics, this unit uses a transformer with a 70 V x 5 A secondary,...