This 90s Motorola circuit from, has current limiting foldback. The power transistor is from the era, and equivalents can be used. The output is 250 V.
Found in old documentation, this circuit uses components that are still common on the market. The...
This circuit was obtained in a Electronics World of 1968. The transistors can be equivalent as the BC558...
Found in an Electronics World of 1966 this circuit is intended for use with a microphone as an...