> Within milliseconds every PFC in the building would pick up on a 
 > ripple reflected back into the local grid, and the whole setup 
 > then avalanches into a feedback loop forcing the current/voltage 
 > peaks to blow the mains in the building. 
Hmmm... maybe I should actually READ that Computer Shopper Magazine that 
arrives here every month. >
Thanks for the report, but might I ask what is a "PFC"; that's a TLA that I'm 
unfamiliar with.
 > Your sin wave UPS is not all that smooth when you look at it on
 > a scope; there is a dozen or so steps or tics on each swing, and 
I've looked at my UPS output with a 'scope and it looks pretty darn good to 
me. I can't see anything that looks different from the AC line, although it 
probably is not quite the same.
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