On Mon, 01 Jun 1998 14:49:39 rigdonj_at_intellistar.net remarked:
> Oddly enough a lot of the HP stuff is spec'd to run on 50 to
> 440 Hz. I'm not sure why unless it's to allow it to also be used
> in aircraft but that doesn't seem likely.
Shipboard applications are frequently run at 440 Hz as well as
aircraft; it's quite common in military environments as it keeps the
transformers small. Actually, I believe it's 400 Hz, not 440, but
whats a few ticks between friends?
On a similar note, ferroresonant transformers can do some very
bizarre things when offered a mains frequency they weren't designed
for. DG's Eclipse S/230 uses a single resonant transformer, rectifiers,
and filter caps for its power supply and little else. The specifications
call for a mains frequency deviation of under 1/2 Hz in either
direction. However, if the frequency is good, the regulation that
the supply gives is quite remarkable.
______________________________________________________________________
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| Carl Richard Friend (UNIX Sysadmin) | West Boylston |
| Minicomputer Collector / Enthusiast | Massachusetts, USA |
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Received on Mon Jun 01 1998 - 15:23:48 BST