This sensor circuit from a 1967 Ferranti documentation uses components from the era. The circuit can be used as a shield, although the integrated one used is unusual today.
To obtain triangular signals, we have the circuit in the figure that uses two amplifiers. One of...
This circuit is from a 1960 book by Hugo Gernsback. The transistors are germanium from the time....
Found in Ferranrti's 1974 transistor manual, this circuit uses general-purpose transistors from...