Re: One-shot coil? (fwd)

["Tesla list" <tesla@xxxxxxxxxx>]

---------- Forwarded message ----------
Date: Thu, 12 Jul 2007 18:13:11 EDT
From: FutureT@xxxxxxx
To: tesla@xxxxxxxxxx
Subject: Re: One-shot coil? (fwd)

 
In a message dated 7/12/2007 4:50:10 P.M. US Eastern Standard Time,  
tesla@xxxxxxxxxx writes:

Date:  Thu, 12 Jul 2007 17:19:02 -0400
From: Scott Bogard  <teslas-intern@xxxxxxxxxxx>
To: tesla@xxxxxxxxxx
Subject: Re:  One-shot coil? (fwd)

John,
Is this why some of  the solid state and tube coils I've seen look like 
light sabers, the long  strait thick sparks.  If I am not mistaken, these are 
just drivers  oscillating the secondary, no resonant primary, like a DRSSTC 
or  SISG.  I don't really know, as I have never built a solid state coil of  
any kind (unless you count driving flybacks for plasma globes).
Scott  Bogard.



Scott
 
Yes you are correct.  The SSTC's or tube coils can be run either  pulsed
or continuous.  The light saber effect is caused within a particular  range of
pulse rates along with some other factors.  But even a  "continuous" running 
VTTC is pulsed at the 60Hz AC line frequency so it will give a torchlike  but
usually gnarled, (but not swordlike) spark.  Filtered DC gives the  short 
plasma like sparks
that look like a propane torch sort of .  And yes they are  oscillators.  The
VTTC has a resonant primary, but it doesn't make much difference,  just
a little better efficiency.  Since they use an oscillator,  not much energy
is stored, and peak powers tend to be low, compared to disruptive  coils.
Although DRSSTCs manage to give high efficiency anyway.  
 
John



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