Re: small coil

• To: tesla-at-pupman-dot-com
• Subject: Re: small coil
• From: "Malcolm Watts" <malcolm.watts-at-wnp.ac.nz> (by way of Terry Fritz <twftesla-at-uswest-dot-net>)
• Date: Sun, 19 Dec 1999 17:24:26 -0700
• Approved: twftesla-at-uswest-dot-net
• Delivered-To: fixup-tesla-at-pupman-dot-com-at-fixme

> Original Poster: Raycroft <k.raycroft-at-worldnet.att-dot-net> 
> 
> After building a medium sized TC (450w), I would now like to attempt
> building a smaller one, and would like to make the transformer, cap, gap
> and primary to fit in a 6x6x6 box with the secondary coming out of the
> top.  Is it possible to use a little transformer from an old printer? 
> The reason I ask is that I had an old epson 11" printer that died, and
> there was a stepdown transformer in there.

 
> Big questions:  I assume the transformer is about 120:12 so I would get
> about 1200v.  I may have to put several in series.  Now, about current. 
> Do I need to limit the current some way, or will it have high enough
> inductance to limit itself?

Stop right there. You cannot run the transformer in reverse. You will 
get a big bang and/or fuses will pop. You can use the transformer in 
its normal way, rectify and filter the output and feed that into an 
inverter/rectifier  to generate the voltages you need.

Regards,
Malcolm 

> Most important: Does it seem feasable at all?  I just don't know.  NST's
> provide enough voltage, current is limited, and are designed to step up,
> but I have no clue about how hard one can drive a stepdown transformer
> in the opposite direction.  Any help would be greatly appreciated.
> 
> Thank you for your time,
> Jason Raycroft
> 
> 

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