This differential pulse shaping amplifier was found in documentation from the 1980s. Switching transistors equivalent to the originals can be used.
This simple experimental circuit using only transistor produces a tone given by C1 and C2. Tone is...
This circuit, which can be used as a shield, was found in American documentation from the 1970s....
I This well-crafted circuit was found in an American documentation from 1975. The components are...