The purpose of this circuit found in a 1967 GE SCR manual is to control a heating element. The SCR must have current according to the controlled load.
This circuit was obtained from an old American documentation, and practically any general-purpose transistor...
This oscillator for frequencies up to a few tens of kilohertz was found in a 1970s documentation. The...
This amplifier, obtained in an Argentinian publication of the 1970s, provides a 6 W output. The...