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 a Popular Electronics from the 90s. The circuit uses a general purpose...
This 2000 circuit can work with one of the many infrared remote-control transmitters described in this...
We found this amplifier for automotive use in the Philips Databook of 1990. The circuit has a...