List of Vacuum Tubes - Classes of Vacuum Tube

Classes of Vacuum Tube

By number of electrodes:

  • Diode
    • Fleming valve
  • Triode
    • Audion
  • Tetrode
  • Pentode
    • Beam-power pentode (beam tetrode)
  • Hexode
  • Pentagrid converter (heptode)
  • Octode
  • Nonode or enneode

Variants of cathode-ray tube:

  • Cathode ray tube
  • Charactron
  • Crookes tube
  • Kinescope
  • Monoscope
  • Storage tube
  • Video camera tube
  • Williams tube

By function or other properties:

  • Compactron
  • Iconoscope
  • Klystron
  • Loewe 3NF
  • Magnetron (not obsolescent)
  • Miniature valve
  • Some phototubes
  • Photomultiplier (not obsolescent)
  • Some rectifiers
  • Selectron tube
  • Traveling wave tube

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