This circuit is from 1973 documentation. The transformer has 500 mA of current and the transistor can be the TIP32 mounted on a heat radiator.
This circuit is the factory version of the LM386 low-power amplifier. The sound quality is...
This circuit with transistors of the time was found in the magazine Radio Electroinics of June of...
This circuit charges a battery to power a flashlight at night. The circuit is from an English...