Re: NST protection circuit

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Terry Fritz" <twftesla-at-uswest-dot-net>

Hi Will,

At 03:03 PM 4/22/2001 +0000, you wrote: 



>
> Hello everyone,
>  
> But if i were to hook say 8 in series to gain 200watt -at- 1000ohms, what would
> the heat on the resistors be like?? Would they get progressively cooler from
> the closest on the nst terminals being the hottest, or would the ones at the
> end be the hottest. I am planning on using these resistors:
>  
>
> <http://www.allelectronics-dot-com/cgi-bin/category.cgi?item=1K-25>http://www.
> allelectronics-dot-com/cgi-bin/category.cgi?item=1K-25


Don't use the aluminum cased resistors.  The high voltage just arcs to the
aluminum case around the resistive elements.  Why not just get:

Part number:  L100J1k0-ND
www.digikey-dot-com

http://info.digikey-dot-com/T011/V4/449.pdf
bottom of page

If you string say five 200 ohm resistors together.  the values will add to a
total of 1000 ohms and the power dissipated will divide among them equally.  So
if 100 watts is dissipated each will do 20 watts.

Cheers,

        Terry




>
>  
> I have used smaller ones of these before and due to there anodized aluminum
> casing that acts as a heatsink, the heat issue is drastically reduced. In
> addition to helping with the heat, the case also makes the resistor look very
> presentable:).
>  
> Thanks,
> Will McManus
>
>
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