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 lie detector was obtained in a Japanese publication in 1967. The component with a different symbol...
This old amplifier uses germanium transistors from the time. The circuit is from a Mullard...
This circuit is from an American publication from the 60's. The transistors are made of germanium. It...