Operating in class AB1, this high-fidelity amplifier was found in the 1961 RCA tube manual. The circuit has high input impedance and good gain.
This is the normal circuit of a relaxation oscillator using an unijunction transistor such as the...
This is one of the channels of an amplifier suggested by Westinghouse in 1970s documentation. The circuit...
This circuit of dozens of watts uses germanium transistors and the critical components are...