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[TCML] Strike rail hits and loud bangs - video uploaded

You can see/hear the "bang" at the end of the run. 
Is this a primary coil strike?
How can we fix this?

From: Stephen J. Hobley
Sent: Tue 9/30/2008 9:37 PM
To: Tesla Coil Mailing List
Subject: Strike rail hits and loud bangs

We have a fairly simple coil using a 60ma NST. Recently I changed the tap point on the primary and by chance hit a really sweet spot. 

Usually the Tesla Tuner is pretty accurate and gives good results, but in this case it did not indicate that this tap point was a good one.

The streamer length has increased by at least 50% - but we did notice some rather worrying "bangs" from the Terry filter spark gap when the strike rail is being hit. Is this normal? 

Is it possible to tune a Tesla coil into a self-destructive state?

I would take some pictures, but the darned thing scares me to death...



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