This circuit is from the 70s. The integrated circuit used is not common today and the supply is made with a voltage found in televisions of the time, where it was used.
This circuit was found in 80's Popular Electronics. The components used are common and the number of...
In the figure, from a documentation from the 70s, we have a few-watt amplifier for general use....
We found this amplifier with high input impedance and low capacitance, using FET, in a...