These 6 to 12 V source with current up to 100 mA was found in Radio Electronics magazine from June 19666. The source has a current indicator and uses transistors of the time.
This circuit was found in a Motorola documentation from 1968. The load current is 10 A. The...
This circuit, from 1988 documentation, allows the use of 15 to 60 W dimmed lamps without the need...
Found in a 1967 Delco documentation, this circuit can deliver power from 40 to 50 W at 8-ohm load....