The circuit in the figure is an amplifier with gain 10 for alternating signals using the 741. The circuit is from an article in the Radio Electroics magazine of May 1989.
We found this circuit in a 70s American documentation. The integrated circuits are from that time....
The integrated circuit used in this regulator is unusual, as are the transistors. The circuit is...
This circuit was found in an old Radio Electronics, but can still be assembled as the components are...