This direct coupled amplifier using 3 transistors and low voltage power was found in the April 1961 Radio Electronics magazine.
Suggested by Sprague in the 1980s documentation, this circuit can control three-phase AC motors....
This is a diagram of a 1958 commercial receiver. The circuit was found in documentation at the...
This circuit is from 2001 documentation. The idea is to activate a flashing lamp on the outside of a...