Found in an American publication from the 1980s, this circuit can be found in commercial sound equipment of the time. The list with the component values is given next to the diagram.
This audio amplifier for modulation of AM radio transmitters is from an American publication from...
This nonlinear gain circuit was found in a 1965 Electronic Design. The configuration can be used...
This circuit was found in an old 1970s telecommunication documentation. It is suitable for...