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The vacuum tube strikes back: NASA's tiny 460GHz vacuum transistor that could one day replace silicon FETs | Extremetech
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Electronics Museum---
Vacuum Tubes: The World Before Transistors | Engineering.com
Male hand holds a vacuum tube on a yellow background. A radio tube that came out of the operation in a male hand. Collecting radio parts or recycling Stock Photo - Alamy
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Worlds smallest vacuum tube: 1Ж25Р - a penthode : r/diytubes
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Worlds smallest vacuum tube: 1Ж25Р - a penthode : r/diytubes
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