This is the power supply for the amplifier in the previous circuit. The voltage regulators must be equipped with a heat sink and the transformer is high current.
Found in a 73 magazine for radio amateurs of the 1980s, this circuit uses a dual-gate MOSFET. This...
This shunt voltage regulator was found in an Electronic Design from the 90's. The power transistor must...
This commercial amplifier uses germanium transistors from the era. It was found in a Japanese...