This diagram from a 1967 documentation shows how to switch high voltage neon lamps with 5V TTL outputs. The circuit can be adapted to function as a shield.
This circuit was obtained in a documentation for radio amateurs from 1975. With it we can use a...
Only for reference this is a circuito f a commercial receiver of the year 1958. The circuit uses...
This circuit is from an old American publication. The indicated transistor is oversized as the 15 V...