--------------------<snip>---------------------
True at the high end only. e.g., 168s used MGs because they used
415Hz power but 158s did not; they just used regular old 3-phase 60Hz
220V power.
I never did know why, though. I always wondered whether it was to
keep the number and size of power supply capacitors to a reasonable
minimum.
-----------------<unsnip>--------------------
Transformers for 415 Hz are also much smaller and lighter than those for
the equivalent worload in 60 Hz. power.
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