14-01-2022, 07:35 PM
A microwave oven still uses a diode valve. Though it's simpler than 1940s magnetrons.
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The secret history of electricity
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The secret history of electricity - by djrm - 13-01-2022, 10:26 PM
RE: The secret history of electricity - by Radio Fixer - 14-01-2022, 09:38 AM
RE: The secret history of electricity - by Mike Watterson - 14-01-2022, 07:35 PM
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