This nonlinear gain circuit was found in a 1965 Electronic Design. The configuration can be used as a basis for modern designs with equivalent transistors.
This circuit is from an American publication in 1998. The integrated circuit used is not very easy...
This vibrato circuit was found in Motorola's 1966 documentation. The circuit uses transistors of the...
Any general purpose PNP transistor such as the BC558 can be used on this circuit from an old...