> I now ask whether there are additional benefits to a
> soft-start, or if I
> accomplish the same thing with the autotransformer?
One thing for sure, you can sure kill the voltage regulation
with an autotransformer.
Be sure you haven't hurt the no load to full load HV
regulation. Keep in mind we can't measure the voltage sag
from poor regulation with a typical AC voltmeter, it has to
be measured by watching the HV meter or with a peak detector
meter if you look at regulation on the mains.
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