Re: [TCML] 1/4 wavelength theory/rac. sparks

["Dex Dexter" <dexterlabs@xxxxxxxxxxx>]

You're lucky ,lucky guy to have such coil!
Can you increase coupling on TT-42 again to see
point when racing sparks appear near the bottom
of secondary?
That's quite unusual behavior what you describe.
Maybe you gave to much power (too large bang size)
for the coil of this size.
Overall coupling coeff. seems too low in either case
for significan overtones impact anyway.

Dex

 
--- futuret@xxxxxxx wrote:

From: futuret@xxxxxxx
To: tesla@xxxxxxxxxx
Subject: Re: [TCML] 1/4 wavelength theory ??
Date: Thu, 11 Feb 2010 15:48:25 -0500


 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

 


 

 


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