Re: [TCML] Which Primary Circuit is Best?

[mddeming@xxxxxxx]

Hi Brandon, Chris,

The first circuit you describe will not work at all. The first illustration will work but the power thruput will be lower due to rectification and sparks will be smaller. Having the cap across the transformer also results in higher HV stresses and shorter NST life expectancy. The reason for this has been gone into in great detail in the archives every few years for the last decade or more. The best way to do a sparkgap coil is gap across the transformer.

Matt D.




-----Original Message-----
From: Christopher Karr <chriskarr4@xxxxxxxxxxx>
To: Tesla Pupman List <tesla@xxxxxxxxxx>
Sent: Mon, Mar 29, 2010 4:19 pm
Subject: RE: [TCML] Which Primary Circuit is Best?



ello Brandon,
There are certain circumstances under which different circuit configurations 
on't work; you are correct in that respect.
If the primary coil is in parallel with the capacitor and the spark gap, you 
ill have, effectively, no output when obeying the laws of physics. The 
apacitor won't charge because it is directly shorted across the tank 
ransformer and the primary coil. Current will flow directly through the primary 
oil, effectively avoiding the capacitor since it represents a much larger load.
On the first link you specified, using a diode in that application is a foolish 
dea. The diode will make you lose all 50/60Hz resonance.
As for the latter two configurations, the list (as well as many independent 
oilers) has been debating this for years, though the general consensus is to do 
hatever allows one to use shorter primary leads, so as to minimize power-loss 
ue to stray inductance.
Best of luck,
- Christopher Karr
> From: brandonhendershot@xxxxxxxxx
 To: tesla@xxxxxxxxxx
 Date: Mon, 29 Mar 2010 11:19:39 -0600
 Subject: [TCML] Which Primary Circuit is Best?
 
 Hi all,
 
 So I've seen a lot of different ways to wire the primary circuit, and  
 I'm just wondering if any of them won't work under any certain  
 circumstances or if there are differences in performance.
 The first is where the spark gap is in parallel with the transformer  
 and then the capacitor is parallel with that, then the primary coil.  
 So everything is in parallel here.
 
 The next us where the capacitor is parallel with the transformer and  
 the spark gap is in series along one if the sides, and then the  
 primary coil. http://www.pocketmagic.net/wp-content/uploads/2009/01/tesla_coil_cc.png
 
 The last is where the spark gap is parallel with the transformer and  
 the capacitor is in series on one of the sides, and of course the  
 primary.
 http://deepfriedneon.com/graphics/coil_schematic.gif
 
 Thanks,
 Brandon in AZ
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