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 circuit is from a 1968 Electronic Design. The characteristics of the output transformer are not...
We found this circuit in the July 1988 Radio Electronics magazine. The frequencies are given by...
This circuit is from 1967 General Electric documentation. It uses SUS which are not very common...