Found in a 1967 RCA documentation, this AC power grid contactor can be fitted with modern equivalent components. The SCR and the diodes must be according to the load current.
This double T oscillator configuration can employ operational diamonds and the symmetrical supply...
We found this interesting transistor generator in European documentation from the 1980s. The...
This circuit is from a 1967 US publication. The configuration can serve as a basis for designs...