Vacuum Tube -

Placed between cathode and anode to control the volume of electrons.

Include additional grids to improve efficiency and reduce signal distortion.

Positively charged electrode that attracts the electrons. vacuum tube

Basic rectifiers, converting AC to DC.

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 Placed between cathode and anode to control the

Examples include "magic eye" tubes for signal display, thyratrons, and magnetrons. Key Technical Details

Heated (white-hot) to "boil off" electrons via thermionic emission. vacuum tube

Introduced the grid for amplification.