Re: SV: NST resonance, also NST Failures

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

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

Hi Jon,

Wow!  That is interesting!  That is just the kind of odd arc path "I" would
expect from RF hitting a big winding like that.  Thanks for passing this
info on.

Cheers,

	Terry

At 10:02 PM 2/10/2001 -0500, you wrote:
snip...>
>On the topic of NST failures related to HV RF, I have performed a post 
>mortem on
>two such about ten years ago. In both cases I found the failure mode to be 
>inter
>layer arcing along the outside edge of one secondary coil. Both arcs were from
>one end of the outer layer to a point about one third in towards the bobbin,
>burning the edges of the paper insulation between these points and the
>insulation off the wire. The wire was also found to be burned open at the
inner
>most point of the failure site. At the time of failure, these had been in use
>without safety gaps or other filtration.
>
>For the record...
>-- 
>Jon G. Tebbs
><jgtebbs-at-eos-dot-net>
>