Cathode ray tubes are the most insane consumer electronic of all time, except maybe the VCR. It's an electromagnet-driven particle accelerator that blasts electrons at the inside surface of a massive vacuum chamber made of dozens of pounds of thick-as-fuck glass powered by a deadly capacitor.
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That's before you add in color by the way.
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Magnetrons are pretty insane too,
Electrons orbiting in a magnetic field in an annular space and inducing microwave energy in cavities around the perimeter like wind in an organ pipe.This adaption of a diode vacuum tube Is still the simplest way of generating high microwave power levels for cooking.
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