This transistor tester with different gain ranges was found in documentation from the 1980s. The circuit can still be implemented with more modern components and used with general purpose transistors.
This circuit was found in an Electronic World of 1968. The circuit uses power transistors of the...
This circuit is from a Linear Technology integrated circuit manual from the 1990s. The circuit...
This simple super-regenerative receiver was found in American documentation from the 1980s. The...