Found in an English publication from the 1980s, this circuit can be built with equivalent transistors such as the BC549. The signal must be applied to an external amplifier.
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....