This circuit was originally intended to operate with a solar source for experiments. Transistors are general purpose, and the output current is relatively low.
This power amplifier circuit was marketed in Japan in the 1960s. The transistors are made of...
This circuit can also operate with SW and even VHF signals up to 150 MHz. The circuit can be...
We found this circuit in documentation from the 1980s. The transformer is of the low voltage type...