Re: 6" coil

• To: tesla-at-pupman-dot-com
• Subject: Re: 6" coil
• From: Mark E Finnis <mefinnis-at-medicine.adelaide.edu.au> (by way of Terry Fritz <terryf-at-verinet-dot-com>)
• Date: Wed, 04 Nov 1998 19:57:40 -0700
• Approved: terryf-at-verinet-dot-com

At 06:47 4/11/98 -0700, Frankensteins Helper wrote:

>One problem I had tonight was with
>damping resistors. I have (had!) 3 kohm, 50 watt aluminum housed, wire
>wound resistors on each high voltage output of the two transformers.
>After running the coil for a few seconds one of them actually exploded!

Yep.  I used 3 x 17W wire wounds originally, but they got way too hot with
two 15kV/60mA NSTs.  Went to 6 x 17W wire-wounds mounted on heat sink &
this seems to work well.

I was always a little worried about the alum house resistors, cause the
distance from the terminal to the case is quite short & arc-over always
seemed a likely problem.

cheers,


_________________________________________________
Mark Finnis
Staff Specialist, Intensive Care Unit
Royal Adelaide Hospital
http://www.health.adelaide.edu.au/icu
Ph:  +61 8 82224000   Mbl:  041 2324268
_________________________________________________

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