This amplifier stage without an output transformer was found in Radio Electronics magazine from October 1963. The supply is 12 V, and the output is 8 or 16 ohms.
This circuit uses a crystal phone and can be built with more modern transistors like the BC548. The...
June 2017 - New high power TVS for high-power retention applications with bi-directional features...
This small inverter that produces high voltage from a 6 V source was found in an American...