Re: Coupling stress plot

To: tesla-at-pupman-dot-com
Subject: Re: Coupling stress plot
From: FutureT-at-aol-dot-com (by way of Terry Fritz <twftesla-at-uswest-dot-net>)
Date: Sun, 09 May 1999 14:09:30 -0600
Approved: twftesla-at-uswest-dot-net
Delivered-To: fixup-tesla-at-pupman-dot-com-at-fixme

In a message dated 99-05-09 04:57:48 EDT, you write:

<< www.peakpeak-dot-com/~terryf/tesla/misc/astress.xls
 
 
> I am not sure if this really means anything but...
 
> I calculated the coupling between my primary and 1/2 inch sections along
> the length of my secondary.  This basically is the coupling vs. distance
> along my coil.  I then multiplied this by a sine function that would tend
> to indicate the voltage distribution along the coil.  There is a sharp peak
> in the graph 19% up the coils length.  Perhaps this would indicate where
> the most voltage stress would occur and where racing arcs would be most
> likely to start.  I would suspect that the arcs would start around 15
> percent and up to 50% up the length of the coil from this chart.
 
> Take all this with a BIG grain of salt though...
 
> 	Terry
  >>

Terry, all,

I looked at the numerous burned spots on my secondary which
resulted from years of abusive experiments.  There' s lot of burning
within the bottom 10%, then more burning occurs from a height of
30  to 70%.  Some of this burning probably occured before I placed
a sheet of poly over the primary tap point to reduce the corona and
voltage stresses at that point.  Some of the burning may have been
caused by mistuning.

John Freau