Vacuum Tube Technology

Vacuum tube technology involves electronic devices that control electric signals using a sealed glass or metal tube from which most of the air has been removed. Inside, components like electrodes allow the tube to amplify signals, switch currents, or convert signals from one form to another. Predominantly used in early radios, televisions, and computers, vacuum tubes replaced earlier mechanical devices. While largely replaced by solid-state transistors today, vacuum tubes are still valued in some high-fidelity audio equipment for their unique sound qualities. They exemplify how controlling electron flow in a vacuum enables complex electronic functions.