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Electronics. Vacuum tube. Thermionic emission. Diode. Triode. Rectifiers. Cathode heaters. Triode oscillator. Semiconductor diodes. Transistors. Cathode-ray tube. X-ray tube. Electron microscope. Photocell. Dielectric, induction heating. Neon and ...
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Vacuum tube - Wikipedia
Vacuum tube - Wikipedia
Filament Glow and Red-Plating in Vacuum Tubes
Tube Based Night Light
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Gridless vs. Grid Vacuum Tubes (part 2), January 1937, Radio-Craft - RF Cafe
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What is Vacuum Tube and How does it Work
