A glass or metal container that prevents air molecules from disrupting electron flow. Common Types
Placed between cathode and anode to control the volume of electrons. vacuum tube
Basic rectifiers, converting AC to DC.
Include additional grids to improve efficiency and reduce signal distortion. A glass or metal container that prevents air
A (or thermionic valve) is an electronic component that controls electric current flow within a high-vacuum sealed container. Primarily used in early electronics, they amplify, switch, or regulate signals by controlling the movement of electrons emitted from a heated surface. Core Components vacuum tube
Heated (white-hot) to "boil off" electrons via thermionic emission.
Introduced the grid for amplification.