This circuit of dozens of watts uses germanium transistors and the critical components are transformers. The circuit is from the 1960 Mullard transistor application manual.
This circuit was obtained in the publication 101 Electronics Projects of 1979. The circuit can be...
This circuit was found in 80's Popular Electronics. Transistors are commonly used. The...
We found this circuit with 5.3V zener in a Philips publication from the 60s. The op amp could be a...