This high quality circuit with complementary symmetry was found in an Electronics World of 1966. It can be made with modern transistors like the BD or TIP series.
This transformerless power supply uses an SCR as a regulator. It was found in a Popular...
May 2017 - Mouser Electronics announced the availability of the new P7 CoolMOS transistors from...
This is the power supply circuit for the amplifier in the previous circuit. The source is...