Posted by Gene on 02/24/07 18:14

Thanks.

If anyone would care to pick out a specific hardware
device(s) by make & model - I would be most appreciative.
I'm dizzy from reading specifications for the last two days :-)

Gene





"w_tom" <w_tom1@usa.net> wrote in message
news:1172336886.375961.307720@h3g2000cwc.googlegroups.com...
> On Feb 23, 6:50 pm, "Gene" <g...@wildblue.net> wrote:
>> Yeah, I need to do some research & find one that maintains
>> a high constant voltage & is extremely clean. I suspect that
>> line noise could play a part in my problems. Having 110VAC
>> attached to the camcorder has always been a noise concern
>> for me. It's hard to catch this with a common volt meter.
>
> The typical UPS connects electronics directly to AC mains when not
> in battery backup mode. This one, for example, claims a modified sine
> wave. And so we look at that modified sine wave. 120 volts is two
> 200 volt square waves with up to 270 volt spike between those square
> waves. Is that UPS protection? Yes. Is that a sine wave. Yes. But
> the UPS is the source of the dirtiest electricity.
>
> You are making assumptions rather than following the evidence. The
> power supply inside each component must make all noise irrelevant.
> But other problems may exist. One as suggested ground loops.
>
> Meanwhile the UPS as described will cost $500+.
>
> Do you have line noise? Well if the power supply inside components
> is defective or missing essential functions, then these line filters
> may replace what should have been installed:
> http://www.schurterinc.com/products/usa/pemfilter.asp
> http://www.corcom.com/
> http://www.cor.com/PDF/Q.pdf
> http://www.interpower.com/ic/p30-35list.asp
> http://www.interpower.com/scripts/wsisa.dll/WService=ic/p35list2.p?only_filter=YES
>
> An example of how it might be assembled:
> http://www.ethanwiner.com/dimmers.html
>
> Otherwise find hefty line filters such as
> www.surgex.com
> www.zerosurge.com
> www.brickwall.com
>
> Notice the price to fix something that must be inside that
> electronics power supply. But again, we are only assuming noise.
> Reality is probably something completely different. And again, why do
> they say in CSI, "Follow the evidence". You are trying to solve a
> problem using classic junk science reasoning. Provides are facts that
> others should have known before making that UPS recommendation. What
> does the UPS numerical specs say? That UPS typically connects
> appliances directly to AC mains (and the noise) when not in battery
> backup mode.
>
>

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