Re: damaging circuits with ????

westom1@xxxxxxxxx wrote:
On Nov 19, 7:34 am, jmfbahciv <jmfbahciv@aol> wrote:
I don't know about today's devices, but the variations in power
levels delivered by the electric company could also create
havoc.

Voltages must drop so low that an incandescent bulb dims to only 40%
- and still a computer's power supply must provide power just fine.
Another standard that existed for decades.

I didn't want my computer power supplies to have a variation of
+_15 volts twice a minute. They were not built for that
kind of abuse (this was in olden days when one computer was iron
boxes that would fill a gymnasium). The peripherals and TTYs
were spec'ed to be used in industrial-strength environments
and not the poofy power environment of a household.

Power must vary well beyond what is acceptable for any electric
utility and the power supply must even start up just fine - as stated
in the ATX power supply spec.

I'm not talking about startup. I'm talking about the cycling when
using the device. At some point, it will not cycle up because
it's been "worn out" by the AC.


You may be confusing a 'whole house' surge protector in the breaker
box with something completely different - a series mode filter.

I wasn't the one who was confused. :-) I did write that the
electrician called it a power conditioner. He got the term
(I think) from the guy who sold him the widget. It worked
so well, that this guy put one in his house.

I did notice that, when the power was going to shut down, the
lights no longer grew really, really bright just before the
power went off. that kind of surge can also wreak havoc
with electronics.

/BAH
.

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