Re: [TCML] SSTC help

[John Forcina <forcijo10@xxxxxxxxx>]

Yes.  I am also very curious to see sparks from DC Cox's systems.  I have
been hearing a lot about how good they are and i am just interested in some
more spark pictures and/or more info.

On another note in regards to Rob's SSTC,  Can you provide us with some
scope shots of your gate waveforms or your feedback circuitry etc...?  From
my personal experience with that coil it does not like being ran with a
topload.

On Tue, Oct 13, 2009 at 11:11 PM, Dr.Hankenstein <
dr.hankenstein@xxxxxxxxxxxxx> wrote:

> Show me the sparks!
>
> H
>
> -----Original Message-----
> >From: DC Cox <resonance@xxxxxxxxxxxx>
> >Sent: Oct 13, 2009 4:59 PM
> >To: Tesla Coil Mailing List <tesla@xxxxxxxxxx>
> >Subject: Re: [TCML] SSTC help
> >
> >If your igbts are not phased properly one may be slightly turned on while
> >the other is slightly off.  If you don't phase them properly they will
> blow
> >is short order.
> >
> >Also, check for high frequency ringing which is a killer.  Proper
> filtering
> >with inductors or caps can eliminate this problem.
> >
> >The system of feedback you use to keep the pri circuit in tune with the
> sec
> >circuit is also critical.  Solid state components work great but will
> >absolutely not tolerate much range as will the spark gap type oscillators.
> >
> >I hope to have a set of boards populated and ready for sale this winter.
> >Right now they are working great running with Powerex CM300s on our test
> >coils.
> >
> >Dr. Resonance
> >
> >
> >
> >
> >On Mon, Oct 12, 2009 at 9:13 PM, Rob Byron <mustang_5l87@xxxxxxxxxxx>
> wrote:
> >
> >> Hello, I have been working on my first solid state coil for a good part
> of
> >> a year and after many blown components and hours searching the net, I am
> >> stumped. The coil I am working on is of Steve Ward's mini sstc. I used
> eagle
> >> to etch a board to replace the crappy proto type board. This gave me
> better
> >> results ( my UCC's don't fry anymore :) I put an LED on the output of
> the
> >> interruper to make sure that works. My gate drive IC's make a high
> frequency
> >> buzz. Not sure if I should be able to hear that? But it leads me to
> believe
> >> they work. My half bridge is on a variac, rectified and filtered. I get
> >> 170VDC at full power on the bridge. But I can't get breakout?? I did try
> >> swapping the primary leads to get 180* out of phase. Here is a link to
> >> video.     http://www.youtube.com/watch?v=kX7oV9iC0Jo
> >>
> >> Thanks in advance for any help.
> >>
> >> Rob.
> >>
> >> _______________________________________________
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> >> Tesla@xxxxxxxxxx
> >> http://www.pupman.com/mailman/listinfo/tesla
> >>
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