Vacuum Tube Symbols

The vacuum tube or vacuum valve is used to switch or amplify an electrical signal by controlling the movement of electrons in a space at low vacuum pressure, or by means of gases.

Symbols of Vacuum Tubes / Electron Tubes / Thermionic Tubes

Symbol Description Symbol Description
Vacuum tube, diode symbol Vacuum tube
Electronic valve
Diode
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  Vacuum tube / electronic valve symbols, triode symbol Vacuum tube
Electronic valve
Triode
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Double diode symbol Vacuum tube
Double diode
  Double triode symbol Vacuum tube
Double triode
Pentode symbol Pentode
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  Hexode symbol Hexode
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Heptode / Pentagrid symbol Heptode / Pentagrid
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  Octode symbol Octode
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Nonode symbol Nonode
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  Krytron symbol Krytron
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Thyratron symbol Thyratron
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  Photocell symbol Photocell
Ignitron symbol Ignitron
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  Photocell symbol Photocell
Cold cathode dissipator symbol Cold cathode dissipator
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  Effluent valve symbol Effluent valve
Symbol of Effluent tetrode with auxilar anode and control grid Effluent tetrode with auxilar anode and control grid
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  Rectifier effluent valve symbol Rectifier effluent valve
Neon lamp symbol Neon lamp
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  Lightning Light lamp Lightning light lamp
Cathode Ray tube, CRT symbol CRT - Cathode Ray tube
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  Cathode Ray tube, CRT symbol CRT - Cathode Ray tube

Basic Elements Symbols

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Vacuum tube, capsule, ampoule symbol Vacuum tube, capsule, ampoule   Grid symbol Grid
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Anode symbol Anode
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  Cathode symbol Cathode
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Indirectly heated cathode symbol Indirectly heated cathode   Directly heated cathode symbol Directly heated cathode
Filament / Heater symbol Filament
Heater
     

Pinout Vacuum Tubes

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A / P Anode, Plate   G Grip
C / K Cathode, emitter   S Screen
I Ignitor   Sup Suppressor grid
H / F Heater, Filament   Pins in a triode e.g. pins in triode

Symbols of Sockets of Vacuum Tubes

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Decal socket symbol Decal socket   Noval socket symbol Noval socket
Magnoval socket symbol Magnoval socket   Octal socket symbol Octal socket
Rimlock socket symbol Rimlock socket   Miniature socket symbol Miniature socket
Alignment in the socket symbol Alignment in the socket   Alignment in the socket symbol Alignment in the socket
Picture gallery of vacuum tubes / thermionic valves
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