How Magnetic Amplifiers Controlled Power Before Transistors Took Over

Vintage Electronics Archive

Vintage Electronics Archive

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Magnetic amplifiers once controlled enormous amounts of electrical power using little more than wire, iron, and magnetism.
This video explores the rise and fall of the magnetic amplifier—from its early use in radio transmitters and military control systems to rockets, power stations, early computers, and even personal computer power supplies.
Discover how magnetic amplifiers worked, why engineers trusted them in demanding environments, how they competed with vacuum tubes and transistors, and why silicon devices eventually pushed them out of most mainstream electronics.
We also explore one of the strangest parts of the story: magnetic amplifiers did not disappear once. They were replaced, returned, and disappeared again as new engineering problems repeatedly gave the old technology another chance.
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