This Intersil circuit was found in a 1980s documentation. Operational are of the time, but current equivalents can be experienced. The graph with the circuit performance is given next to the diagram.
This astable multivibrator has an emitter coupling between the transistors. The circuit is from...
This circuit is from the 1968 ARLL documentation. The MOSFET admits equivalent and the coil...
This 1960s Japanese receiver uses 6 germanium transistors, being powered by a 6 V voltage obtained...