Re: [TCML] Secondary to toriod ?

[mddeming@xxxxxxx]

Hi Stan,

If there is no metal attaching the bottom of the coil or its receptacle 
to the base,
then the chances of internal arcing are reduced. The relatively small 
radius of
curvature of a bolt head could cause it to act like an internal 
breakout point,
encouraging internal arcing. A heavy glop of insulating material on the 
bolt head
and/or a well-sealed baffle inside the top of the secondary form would 
eliminate
any problem. Over the years, some people have run successfully with 
little or no
protection over bolts, etc. It's a matter of more likely to have 
problems vs less
likely to have problems, and your comfort level and ability to afford 
the recovery
from an "Oh S***" event. ;^}


Matt D.


-----Original Message-----
From: stanley miller <swm334@xxxxxxxxx>
To: tesla@xxxxxxxxxx
Sent: Sun, 24 Aug 2008 12:39 pm
Subject: [TCML] Secondary to toriod ?



Hi all,
 
I am wondering if anyone could explain why a zinc carriage bolt 
inserted into
the center of a plastic cover, glued on top of the secondary, with 
the bolt head
inside covered by a plastic cap would not work or be potentially 
dangerous. 
This would allow the toriod to be completly adjustable, limited only by 
the size
of the bolt.  I have never seen a TC with this sort of setup, it is 
always with
standoffs or pvc piping rigged up in some way or something else.
Please correct me w
here my theory is wrong.
 
-If the secondary cover sits 1.5" to 2" inches above the last winding 
on the
secondary the only thing that could still affect the bolt would be 
magnetic
field which i do not see how it would hurt the bolt or shunt it in 
anyway.
 
-Since the toriod would be at the same potential as bolt there would be 
no fear
of arcing to it.
 
-The bottom inside of secondary would have nothing metal to arc 
thru from top to
bottom.
 
-since toriod capacitance is dependent on size wouldn't the bolt add a 
small
amount to the overall capacitance of toriod
 
-I am embarassed to say i have an electrical degree and work in 
electronic field
and am asking such a silly question.  ( but i do not pretend to know 
anything
about tesla coils or high voltage for that matter!)
 
Thank ya all!
Stan 
   



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