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A comment on The Magnetic Amplifier – A Lost Technology of the 1950s.

Re:The Magnetic Amplifier – A Lost Technology of the 1950s by sleeved5 on Thursday June 18, 2020 @01:11AM (#23559980)
Mag amps are still used for post-regulation in switching power supplies, such as the Mean Well QP-200 and some 80%+ efficient ATX power supplies.
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Re:The Magnetic Amplifier – A Lost Technology of the 1950s by segfaultbuserr on Thursday June 18, 2020 @01:44AM (#23560123)
+1.

See also: Magnetic Amplifier Control for Simple, Low-Cost, Secondary Regulation by Bob Mammano, Unitrode Corporation (now Texas Instruments).

https://www.ti.com/lit/ml/slup129/slup129.pdf

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Re:The Magnetic Amplifier – A Lost Technology of the 1950s by blattimwind on Thursday June 18, 2020 @06:52AM (#23561846)
Are these still around though? Single-rail designs have been trickling down into lower and lower price points, meanwhile the cheapests power supplies never had independently regulated rails in the first place.
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