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Posted by Jim Yanik on June 20, 2010, 6:18 pm
 




that shouldnt affect an -incandescent- .
at 60hz,the filament will average out the waveform.

--
Jim Yanik
jyanik
at
localnet
dot com

Posted by Jim Wilkins on June 20, 2010, 7:14 pm
 



I use a light bulb to load UPCs that I'm testing, and noticed that the
bulb brightness is very sensitive to the voltage and width of the
square output pulse. The bulb responds to changes that are barely
visible on the scope.

jsw

Posted by The Daring Dufas on June 20, 2010, 8:33 pm
 

On 6/20/2010 2:14 PM, Jim Wilkins wrote:

"UPC's"  Universal Product Codes?

TDD

Posted by Dan Lanciani on June 20, 2010, 8:46 pm
 

kb1dal@gmail.com (Jim Wilkins) writes:
| > ...
| > that shouldnt affect an -incandescent- .
| > at 60hz,the filament will average out the waveform.
| > Jim Yanik
|
| I use a light bulb to load UPCs that I'm testing, and noticed that the
| bulb brightness is very sensitive to the voltage and width of the
| square output pulse. The bulb responds to changes that are barely
| visible on the scope.

Indeed.  I once got a Best FERRUPS online UPS because everybody told me
the quality was spectacular.  The first thing I tried was a 100W light
bulb, and interrupting mains power caused something way beyond a flicker,
almost to the point of a double blink.  I was disappointed, but then the
same everybody told me that lights were very sensitive and I shouldn't
worry about it.  If this is the same kind of thing I don't want to spend
a lot of time trying to "fix" it.  In particular, I don't want to end
up with the maufacturer swapping a "reconditioned" unit (that behaves
the same but is all beat up) for my nice new one because they don't want
to admit that the lights flicker...

                Dan Lanciani
                ddl@danlan.*com

Posted by Tony on June 20, 2010, 7:53 pm
 

Jim Yanik wrote:

Ah, I read that wrong.  I guess I was just assuming fluorescent.

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