Hello David,
Thank you for the heartfelt and kind sentiment.Empathy between coilers is indeed something special...
Phillip.
_____________________________________________________________________________
14 Broad Street, Stamford, Lincs PE9 1PG
Tel: 01780 753008
On Wednesday, 4 July 2018 19:52:09 BST, David Rieben <drieben@xxxxxxx> wrote:
Hi Phil,
My deepest condolences for your loss. I know it's JUST a secondary coil, but
as a fellow coiler, I most assuredly feel your pain. On the bright side, at
least you did manage to capture some truly spectacular footage of this
secondary coil mishap. I have had this happen on rare occasion with the
operation of my big coil, though fortunately, none of my mishaps turned out
quite that severe! Only once did I actually have to repair some damage to
the side of my coil and was able to get it back into full functioning mode
via the repair. Since I must operate mine outside, I did have one occasion
where the wind actully "blew" one of the streamers back into the side of my
secondary coil, too. Lesson learned - although refraining from outdoor
operation during rainfall is an obvious good rule, non-starters in windy
conditions are also well advised.
I suppose this is a risk, that although may be small with a well-tuned and
efficiently operating coil, is never completely absent. :^/
David
----- Original Message -----
From: "phil" <pip@xxxxxxxxxxx>
To: <tesla@xxxxxxxxxx>
Sent: Wednesday, July 04, 2018 8:48 AM
Subject: [TCML] Bad strike to a 12 inch traditional coil (somewhat terminal)
> Gents & Lassies
>
> Slightly odd one, with a video at: https://youtu.be/tcESWWbcr7I
>
> This recently occurred to Phil S's 12 inch coil that on the day in
> question, and also the previous day, had ran fine. Tuning had been done
> with an oscilloscope, and the coil was not considered over-coupled. The
> winding had though sustained previous damage which had been repaired a
> year previously, however this latest damage did not appear to align with
> where the previous splice had been done, and as mentioned, it had already
> had some higher power runs that day.
> As you will see there was already a streamer strike "in progress" (so as
> to speak) from the toroid down to the primary strike-ring when the 1st
> secondary flash-over up the winding occurs. This finished around 30m/s+
> later and then a second flash-over occurs fairly soon after.
> This time however the ongoing toroid-to-strike-ring streamer (which had
> started 0.5 second or so before the 1st flash-over) now forks over to join
> the secondary flash-over. Then the fun really begins!
>
> Were these flash-overs a result of the initial strike to the strike-ring,
> or just coincidence?
> Initial thoughts were it looked like so called 'racing sparks', but they
> did not initially extend up the winding very far, so jury is still out.
> Coil is 100 bps SRSG using a phase controller.
>
>
> Phil T
> (Luddite Coiler UK)
> _______________________________________________
> Tesla mailing list
> Tesla@xxxxxxxxxxxxxxxxxx
> https://www.pupman.com/mailman/listinfo/tesla
>
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