Re: Large Tesla Coil Design Help

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Jim Mitchell" <electrontube-at-sbcglobal-dot-net> 

Well my friend and I called the power company and told them we were working
on a "school project"  and they gave us the number for some guy, hopefully
we can get a pole pig :-D

Regards - Jim Mitchell
----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Saturday, February 28, 2004 12:25 PM
Subject: Re: Large Tesla Coil Design Help


 > Original poster: "S & J Young" <youngs-at-konnections-dot-net>
 >
 > Jim,
 >
 > With MOTs, PTs or PIGs, just calculate the capacitance needed for your
 > primary to resonate a few percent below your secondary (with toroid)
 > resonant frequency.  Use WinTesla or one of the other calculators to get
you
 > in the ball park.  Best to use at least 10 primary turns to reduce gap
 > losses (more overall efficiency).
 >
 > With a coil that big, consider going with a six MOT stack, oil immersed
for
 > cooling & extra insulation.  A four MOT stack will probably only produce
8-9
 > KV.  Also, consider MOTs start drawing many more amps when the primary
 > voltage goes over about 105-110 volts due to core saturation.  So a six
MOT
 > stack running at 105 volts will be more efficient than a four MOT stack
 > pushed to 120 or more primary volts.  PFC caps across the primary will
also
 > help reduce primary current.
 >
 > --Steve Y.
 >
 > ----- Original Message -----
 > From: "Tesla list" <tesla-at-pupman-dot-com>
 > To: <tesla-at-pupman-dot-com>
 > Sent: Friday, February 27, 2004 4:04 PM
 > Subject: Large Tesla Coil Design Help
 >
 >
 >  > Original poster: "Jim Mitchell" <electrontube-at-sbcglobal-dot-net>
 >  >
 >  > Hello,
 >  >
 >  > A friend and I are looking to build a large 10" coil.  We have acsess
to
 >  > MOTs and synchrnous motors etc,  and sonotubes, wire everything to
build
 >  > the coil except the capacitors.
 >  >
 >  > Now we were thinking of making a four MOT stack to give around 10,000
 >  > volts.  The problem is, I have no clue what kind of capacitance will be
 >  > needed for this coil, or what the LTR for a MOT stack would be.
 >  >
 >  > I was thinking of an MMC but with the amount of capacitors im gussing
we
 >  > will need, it will cost 600$ (ha ha)  !!!
 >  >
 >  > What would be the best bet for capacitors for this coil?
 >  >
 >  > Thank you,
 >  >
 >  > Regards - Jim Mitchell
 >  >
 >  >
 >  >
 >
 >