Re: [TCML] 1/4 wavelength theory ??

[futuret@xxxxxxx]

 Dex,

On my TT-42 coil, I got racing sparks near the bottom of the secondary
which burned up some of the bottom turns up to a height of about 2". 
I had to remove those burnt turns, and replace the wire in that area.  
However when I repaired it, I stopped winding the wire at such a height
that the secondary winding began 1/2" higher than originally.
These racing sparks were due to over-coupling.  No primary to
secondary flash-overs occurred.

With some other coils, I had racing sparks at various other areas on 
the secondary.....sometimes near the top, sometimes near the middle,
etc.  

The TT-42 coil can be seen at my website:

   http://futuret.110mb.com

John

 


 

 

-----Original Message-----
From: Dex Dexter <dexterlabs@xxxxxxxxxxx>
To: Tesla Coil Mailing List <tesla@xxxxxxxxxx>
Sent: Thu, Feb 11, 2010 3:23 pm
Subject: RE: [TCML] 1/4 wavelength theory ??


Thanks for advice.
I think I'll do that with current coil 
when I finish my new , bigger coil.
I plan to push then my little coil 
to the point of destruction just for a fun.
Will also test your method of getting racing sparks.    

What you said about your experience with racing sparks
looks like normal consequence of the set up described.
Big smooth top loads prevent spark breakout and more
energy gets acumulated,higher voltage built across secondary.
And as you continue to increase coupling the efficiency of energy
transfer increase furtherly resulting in more voltage to.
Some point near the top of secondary gets
finally overstressed and racing sparks start poping out.


Dex 


 

 
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