It's not uncommon for Mil spec ratings to be such as to allow a lower
temperature rise in the transformer windings, thus letting you 'push' things a
bit. This allows for such extremes in mil use as higher ambient temperatures,
for example, than you'd have usually in the shack - unless you live in Phoenix
in summer and don't turn on the A/C! So you'd probably run at about 1000 to
1200 Amps/square inch rather than 1500, and quite possibly at a lower flux
desnity in the iron, too, all of which would allow normal amateur use at the
28 Amps a pair of 4-400s wants without too much strain. Overunning oil filled
transformers can be a bit more dodgy, because if they get too hot, the pressure
can burst the seals and it gets AWFULLY messy! Don't ask how I know........
73
Peter G3RZP
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