This circuit was found in a documentation from 1948. There are 5 valves with push-pull output. The source uses a transformer, and the indicated application is with turntables.
This circuit was found in an American documentation from the 70s, but it can be implemented with a...
This integrated contains a Class B circuit originally developed to provide 6 W in a car radio...
This differential amplifier, found in a 1964 Electronic Design, has a gain of 30. The setting can be...