[GreenKeys] RE; UPS overview and tech cosiderations

[Brooke Clarke]

Hi Larry:

Some decades ago I upgraded by Southwest Technical Products "6800" computer by 
changing out the transformer.  The replacement had an extra winding and across 
that is placed a cap that resonates at 60 Hz.  This not only gets rid if spikes 
but also provides a few AC power line cycles of backup power.

Have Fun,

Brooke Clarke
http://www.PRC68.com
http://www.precisionclock.com
http://www.prc68.com/I/WebCam2.shtml 24/7 Sky-Weather-Astronomy Cam


Larry Tighe wrote:
> Hi Eugene et al,
> 
> Would putting the square wave-rich looking output of your UPS into a 1:1 
> external transformer reshape the wave to sine?
> 
> Lar
> 
> 
> 
> An only mildly interesting story from me.
> 
> 
> 
> 
> I finally deduced that this must be because of the waveform of the ups
> being probably very square! The heathkit was probably seeing 120Hz in
> stead of 60Hz!
> 
> Regards
> Eugene
> 
> 
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