Found in American documentation from the 90's, this circuit is very current and can be implemented with transistors of general use. Never use a power supply without a transformer.
This circuit was obtained in an old 1983 magazine, but it can still be easily assembled. The...
This circuit was found in the February 1997 Electronics Now magazine. The circuit has a power...
The integrated circuit used in this amplifier is not common today. The circuit is from a...