We found this circuit in a 1967 El3ectronics World. The transistors are from the era but can be replaced by current equivalents. The circuit is for 5 A loads.
This circuit provides just over ½ W to a small speaker. We found this configuration in an old...
Found in American documentation from the 1980s, this circuit can be designed with equivalent...
This circuit was found in the December 1993 issue of Electronics Now. With the components shown the...