Found in a 90s documentation, this circuit triggers the SCR when there is an overvoltage in order to cause the fuse to blow quickly. The SCR can be a TIC106.
The integrated circuit used in this configuration is uncommon today. The diodes are for general use...
This oscillator or clock generator generates rectangular signals and frequencies up to 100 kHz....
This power supply with transistor regulation was obtained in a 1995 documentation. The power...