Re: Solid state gaps beginners questions? (fwd)

["Tesla list" <tesla@xxxxxxxxxx>]

---------- Forwarded message ----------
Date: Fri, 8 Jun 2007 01:29:52 EDT
From: Mddeming@xxxxxxx
To: tesla@xxxxxxxxxx
Subject: Re: Solid state gaps beginners questions? (fwd)

In a message dated 6/7/07 11:50:35 P.M. Eastern Daylight Time,  
tesla@xxxxxxxxxx writes:


---------- Forwarded message ----------
Date: Thu, 07 Jun 2007  16:30:44 -0400
From: Scott Bogard <teslas-intern@xxxxxxxxxxx>
To:  tesla@xxxxxxxxxx
Subject: Solid state gaps beginners questions?

Hey  everybody,
Since everybody is talking about this "SISG"  I have a few simple easy 
to answer questions, as a "never touched solid  state" person.  Obviously 
these SISGs are more efficient, lending to  much bigger arcs, but what are 
the streamers like?  Do they look like  conventional TC streamers, or are 
they like the swords produced with tube  coils?  I've read that DRSSTC 
streamers look exactly like  conventional streamers, what is the difference 
between DRSSTC and  SISG?  People have been talking about "triggered SISG", 
what does  that mean?  Final question, a short while ago, I suggested 
building a  rotary "full contact" spark gap, I haven't started it yet, but my 
question  is this, could one simply string a whole bunch of transistors ?(or  
mosfets, or whatever) in series, to obtain the necessary voltage rating,  and 
than put strings in parallel for the necessary current rating of tank  
discharge, (like an MMC, but with transistors) and then trigger the bases  of 
all of them simultaneously with a low voltage, full contact "spark gap"  to 
fire the solid gap (actually, if my knowledge serves me well, the  contact 
gap would have to cease fire, or shut off power to the transistors  to fire 
the main gap).  Any thoughts on this?  Do I have the  right idea, or do I 
have no clue what is going on!?!  Just  curious.
Scott Bogard.






Hi Scott,
 
I can answer one of the questions. In principle, an array would work.  
However, finding the required number of components with  characteristics that 
identical, and switching them with absolute  synchronicity would be very unlikely. 
Without identical turn-off and  turn-on, you would have unbalanced loads 
resulting in what I believe would be  catastrophic failure.
 
Matt D.



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