Re: [TCML] 1st light after rebuild

[futuret@xxxxxxx]

 Shaun,

The gap might be heating up and the quench failing.  You may need more 
air flow on the gap.  Also the coil may need to be tuned outward on the primary.
Coupling may be too tight too of course.  So you may want to first loosen
the coupling (to prevent secondary damage), then add some more air flow
on the gap if needed, and see if tuning outward helps.  If it needs tuning
outwards, then the sparks will get longer too, after you retune.  

Cheers,
John  

 


 

 

-----Original Message-----
From: Shaun Epp <scepp@xxxxxxx>
To: tesla@xxxxxxxxxx
Sent: Sun, Apr 11, 2010 4:29 pm
Subject: [TCML] 1st light after rebuild


I fired up my tesla coil last night.  It was working pretty good till I noticed 
racing sparks shooting down from the secondary.  They'd start about 2/3 the way 
up and go down, I guess my coupling is too high.  I never did get it tuned 
because I didn't want to damage the coil with the racing sparks, but I was 
getting 3 to 4 foot arcs in all directions.  I didn't need a breakout point.  
The coil is louder now than it used to be and the sparks seem brighter.  It's 
been two years since I've had this thing going and it was pretty exciting.  Is 
it normal for the racing sparks to start alone the side of the secondary like 
this.? 


coil specs:

secondary: 4.25 " by 22.25"
toroid is 16" x 5" and is 3 inches above secondary
primary is a flat spiral of 3/16 " copper tubing
primary tap around 10 turns
primary capacitor is 0.0321uF
dual static gap, tungsten rods
NST is 12kv, 60mA
Terry filter

thanks,

Shaun Epp


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