The Old Ferroresonant MAGNATEK Converters...
These dinosaurs were 30X as common as competitive converters and were a flawed design from the word go... OEM chose the BW Magnatek units because they were the least expensive of the lot. I came a MAG...
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The only thing I can think of is that Magnetek had dozens of designs. Adding a 100uf cap on the relay resistor unit output raised voltage .3 volt If it were purely linear it would not have done that nor should it have kept the same output voltage with wildly varying input AC voltages. The 7 series ferroresonant chargers indeed had a completely different design concept. The model noted in the PDF link has an SCR. The units I worked on definitely did not have an SCR. Also a linear transformer's output voltage varies via the load on the secondary windings.
Magnetek was a busy company. Too bad they got things more correct at the bitter end of their converter history.
Magnetek was a busy company. Too bad they got things more correct at the bitter end of their converter history.
