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variacs




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From:  D.C. Cox [SMTP:DR.RESONANCE-at-next-wave-dot-net]
Sent:  Friday, March 13, 1998 8:31 PM
To:  Tesla List
Subject:  Re: variacs

to: Nick

Your 9 and 10 amp variacs should be good for 15 amps if you keep the duty
cycle short -- as in Tesla coil work.

DR.RESONANCE-at-next-wave-dot-net


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> From: Tesla List <tesla-at-pupman-dot-com>
> To: 'Tesla List' <tesla-at-pupman-dot-com>
> Subject: variacs
> Date: Friday, March 13, 1998 9:01 AM
> 
> 
> ----------
> From:  Jim Lux [SMTP:jimlux-at-earthlink-dot-net]
> Sent:  Thursday, March 12, 1998 1:36 PM
> To:  Tesla List
> Subject:  Re: variacs
> 
> 
> > From:  nick [SMTP:nick-at-erie-dot-net]
> > Sent:  Thursday, March 12, 1998 10:49 AM
> > To:  tesla-at-pupman-dot-com
> > Subject:  variacs
> > 
> > Hello,
> > 
> > I just got back from a hamfest and picked up two varacs for 5 bucks.
That
> > is both for 5!  One is a powerstat 140V 9A type Q116u and the other is
a
> > Technipower type W5S30.
> > 
> > Dose anyone have any info on the technipower variac. It looks like a
120V
> > 10A. I would like to know how hard I can push it with out danger. 
> 
> Do it empirically... Hook up a variable load and load the variac up until
> it starts to get too warm. Figure the time constant with all the iron and
> copper is probably 10 minutes or so, so don't run up the current too
fast.
> Give it time to stabilize at each load setting, then disconnect the power
> and measure the temperature with one of those quick reading kitchen
> thermometer probes. You can probably go to 100 degrees C safely(?)
> depending on the insulation class.
>  
>