sleeved5··on The Magnetic Amplifier – A Lost Technology of the 1950sMag 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.
sleeved5··on The Magnetic Amplifier – A Lost Technology of the 1950sHow long is a string? No more than any other magnetic component, such as the switching transformer in your cellphone charger...