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
Read more about this topic: List Of Vacuum Tubes
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