Circuits similar to this can be found in this section. This is from 1967 General Electric documentation. The main SCR must be fitted with a heat sink.
To obtain triangular signals, we have the circuit in the figure that uses two amplifiers. One of...
This circuit is from a 1960 book by Hugo Gernsback. The transistors are germanium from the time....
Found in Ferranrti's 1974 transistor manual, this circuit uses general-purpose transistors from...