Old TVs, early supercomputers, and modern fancy sound equipment all use vacuum tubes. But why? What does a vacuum tube do?
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At the time they were made they were revolutionary. They were essentially the best way to make a diode at the time, which is an essential component in all electronics. Even today’s microprocessors are nothing more than many very tiny diodes.
[this video](https://youtu.be/FU_YFpfDqqA?si=9HmEVCQZpQqZNnPd) explains everything perfectly
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