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.
| Symbol | Description | Symbol | Description | |
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Vacuum tube Electronic valve Diode + Info |
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Vacuum tube Electronic valve Triode + Info |
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Vacuum tube Double diode |
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Vacuum tube Double triode |
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Pentode + Info |
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Hexode + Info |
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Heptode / Pentagrid + Info |
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Octode + Info |
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Nonode + Info |
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Krytron + Info |
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Thyratron + Info |
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Photocell | |
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Ignitron + Info |
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Photocell | |
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Cold cathode dissipator + Info |
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Effluent valve | |
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Effluent tetrode with auxilar anode and control grid + Info |
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Rectifier effluent valve | |
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Neon lamp + Info |
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Lightning light lamp | |
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CRT - Cathode Ray tube + Info |
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CRT - Cathode Ray tube | |
Basic Elements Symbols |
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Vacuum tube, capsule, ampoule |  |
Grid + Info |
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Anode + Info |
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Cathode + Info |
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Indirectly heated cathode |  |
Directly heated cathode | |
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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 |  |
e.g. pins in triode | |
Symbols of Sockets of Vacuum Tubes |
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Decal socket |  |
Noval socket | |
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Magnoval socket |  |
Octal socket | |
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Rimlock socket |  |
Miniature socket | |
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Alignment in the socket |  |
Alignment in the socket | |
Picture gallery of vacuum tubes / thermionic valvesDownload symbols |
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