Re: MOSFET TC design (fwd)

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: List moderator <mod1@xxxxxxxxxx>



---------- Forwarded message ----------
Date: Sun, 22 Oct 2006 17:36:21 -0500
From: resonance <resonance@xxxxxxxxxxxx>
To: Tesla list <tesla@xxxxxxxxxx>
Subject: Re: MOSFET TC design



in a word --- cost.   He got them off Ebay cheap.

Dr. Resonance
----- Original Message ----- 
From: "Tesla list" <tesla@xxxxxxxxxx>
To: <tesla@xxxxxxxxxx>
Sent: Monday, October 23, 2006 8:44 AM
Subject: Re: MOSFET TC design


> Original poster: "S&JY" <youngsters@xxxxxxxxxxxxxxx>
> 
> D.C.,
> 
> Just curious - why did Chris Hooper use MOSFETs instead of IGBTs?
> --Steve Y.
> 
> ----- Original Message -----
> From: "Tesla list" <tesla@xxxxxxxxxx>
> To: <tesla@xxxxxxxxxx>
> Sent: Wednesday, October 18, 2006 6:36 PM
> Subject: MOSFET TC design
> 
> 
> > Original poster: "D.C. Cox" <resonance@xxxxxxxxxxxx>
> >
> >
> >
> >
> > I'm designing a small, compact, and highly portable MOSFET powered
> > Tesla coil.
> >
> > I plan on running a batch of printed circuit boards with plans, and
> > offering them to the list members.
> >
> > The heart of the circuit is a pair of $22 MOSFETs that switch MMC
> > power into a coil featuring a 6 inch ID PVC tube secondary.  The sec
> > coil features a 16 inch long winding of #30 AWG  150 degree C.
> > double-insulated magnet wire.  I hope to have the complete unit
> > design available at a cost of under $95.
> >
> > Chris Hooper, an EE from Arizona, produced the original circuit.  I
> > plan on using the same logic but adding the voltage doubler to boost
> > the output from his circuit's 9 inches to a min. of at least 16
> > inches, perhaps as long as 18 inches spark output.
> >
> > The powers supply will be a 120 volt rectified, line doubled power
> > supply to produce a 336 VDC drive into the pri coil.  The pri cap
> > with be a handful of MMC caps based on the 0.15 uF, 2 kV C-D caps.
> >
> > I expect spark output using a 1 x 7 inch toroid to be approx 16 - 18
> > inches long.  Not bad for a complete system weighing less than 6
> > lbs.!  I'm having O.W. run a batch of toroids for me.  The more
> > orders the cheaper the toroids will be for everyone.
> >
> > Anyone that might be interested in a board please advise as I plan on
> > placing the board order early in November.  Contact me off-list and
> > advise.  I will add you to our board bulk purchase list.
> >
> > Also, contact me off-list and I will email you the pri-sec coil
> > geometry plans so you can start working on gathering your parts.  PVC
> > tube, wire, phenolic plates, etc.
> >
> > Happy long sparks!
> >
> > Dr. Resonance
> >
> >
> >
> >
> >
> >
> > 
> 
> 
>