This stage was found in a 1964 Electronic Design. The transistors are of the time and the shape of the signal obtained is shown in the diagram.
In the figure we have a simple amplifier stage with a temperature compensated general purpose...
This full-wave dimmer with SCRs was found in General Electric documentation from 1965. The circuit...
This is a battery powered 3W power amplifier using germanium transistors. The circuit is from an...