Date   : Tue, 22 Nov 1983 15:19:29 EST
From   : Keith Petersen <w8sdz@brl>
Subject: Re: Transformers and European Current

Dave, the UPS and Sola units are "tuned" to 60hz, should NEVER be
plugged into anything else.  The capacitor/inductance combination
is actually carefully peaked at 60hz to provide the desired core
saturation to create the voltage regulation effect.

Generally speaking 60hz equipment (such as monitors and computers)
should not be run on 50hz because the transformers run hotter and
may eventually fail from the heat (or the heat may cause something
else inside to fail).  If you intend your equipment to operate
on both 50 and 60hz, it should be ordered for 50hz originally.
The transformers have more iron in them and run just fine on 60hz
(actually cooler).  This of course cannot be done with "tuned"
systems such as Sola CVTs.