16 Oct
2007
16 Oct
'07
9:06 a.m.
On 16 Oct 2007 at 10:43, Sridhar Ayengar wrote:
If you think an S/390 is heavy, you should try moving
anything older.
Same goes for the comments on 3-phase power supplies. A lot of the
old iron really used 3-phase AC, usually employing a star rectifier
configuration. Ripple frequency for 60 Hz mains is 360Hz, with a
high constant DC component to the unfiltered output.
Some older equipment required a 3-phase 400Hz supply (i.e. get your
MG set running).
Cheers,
Chuck