VACUUMTUBE

Vacuum tube

In electronics, a vacuum tube, electron tube, tube, or thermionic valve or valve is a device controlling electric current through a vacuum in a sealed container. The container is often thin transparent glass in a roughly cylindrical shape. The simplest vacuum tube, the diode, is similar to an incandescent light bulb with an added electrode inside. When the bulb's filament is heated red-hot, electrons are "boiled" off its surface and into the vacuum inside the bulb. If the electrode—called a "plate" or "anode"—is made more positive than the hot filament, a direct ...

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vacuum tube

Noun

  1. An electrical device containing a heated filament inside an evacuated container (generally a glass tube) and used to produce rectification (a diode vacuum tube), amplification or other functions.


The above text is a snippet from Wiktionary: vacuum tube
and as such is available under the Creative Commons Attribution/Share-Alike License.

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