Two-tube regenerative receiver (T1595E)

This circuit is from a Radio Electronics from 1949. The circuit is battery powered and has high impedance listening.

555 Regulated DC Converter (CB15438E)
The circuit shown in the figure is in fact an excellent symmetrical switching source capable of...
Motor Control with Feedback Using Triac (CB13806E)
This circuit for the induction motor was found in Motorola's Circuit Applications for the Triac of...
Universal Motor Control (CB25083E)
This triac control was found in the October 1987 Radio Electronics magazine. The triac must be...