Thermionic Valves

Thermionic valves, also known as vacuum tubes, are electronic devices that control the flow of electric current through a vacuum in a sealed glass or metal container. They consist of a heated cathode that emits electrons, and an anode that attracts and collects the electrons. Thermionic valves were widely used in early electronic devices, such as radios and televisions, before the development of solid-state electronics. They are still used in some specialized applications, such as high-power radio transmitters and guitar amplifiers.

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Thermionic Valves

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