Electron tube
Encyclopedia
Electron tube can be used to describe either of two things:
  • Vacuum tube
    Vacuum tube
    In electronics, a vacuum tube, electron tube , or thermionic valve , reduced to simply "tube" or "valve" in everyday parlance, is a device that relies on the flow of electric current through a vacuum...

  • Gas-filled tube
    Gas-filled tube
    A gas-filled tube, also known as a discharge tube, is an arrangement of electrodes in a gas within an insulating, temperature-resistant envelope. Although the envelope is typically glass, power tubes often use ceramics, and military tubes often use glass-lined metal...

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