On Thu, 11 Aug 2011 14:14:49 -0700 (PDT), whit3rd
wrote:

On Wednesday, August 10, 2011 9:15:19 PM UTC-4, Jon Anderson wrote:
On 8/10/2011 3:22 PM, David Lesher wrote:

Oh, an important exception or two. MANY power supplies for computers
and entertainment gadgets are "switchers".

Let me tell you, that's one HELL of a bang when a 110 PS gets socked
with 220!

Most modern computer supplies either have a switch, or autoswitch. I
haven't seen a '110 PS' in decades. Some, which use a manual switch,
have a hard-to-get-to fuse. The fuse can pop, loud.
Virtually every power supply I have around here is either
"universal" or 115/230. Never seen a 120/240 one, and the universals
are generally good from 100 to 240 - with the odd one being 90 to 250.