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Triode demonstration circuit.svg
Triode schematic labeled.svg
Triode with filament and cathode labeled.svg
Triode with cathode labeled.svg
Triode schematic with filament.svg
Triode with filament labeled.svg
Triode schematic with filament and cathode.svg
Triode schematic with cathode.svg
A409.jpg
VT127A 1.JPG
JAN-750TL-tube.jpg
Tube power opt dir.png
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Troc cross.png
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6C10P.png
6D20P.png
Cylindrical Audion, made by Lee deForest's laboratory, c. late 1910s-1920s - National Electronics Museum - DSC00106.JPG
Cascode-triode-full.png
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