This circuit was found in a 1968 US publication. Transistors used are uncommon today. The circuit can be adapted to operate with modern equivalent components.
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...