Re: [TCML] SSTC help

[Drake Schutt <drake89@xxxxxxxxx>]

Robert- check your local junk/thrift/antique store if there is such a thing
where you are.  I've seen $5 o-scopes at a thrift store.

On Wed, Oct 14, 2009 at 1:19 PM, Rob Byron <mustang_5l87@xxxxxxxxxxx> wrote:

> Anyone got a cheep scope for sale? This would be my first problem as I'm
> new to electronics and don't have a scope.
>
> Rob.
>
> ________________________
>
> On 2009-10-14 12:14:39 -0600 John Forcina <forcijo10@xxxxxxxxx> wrote:
>
> >
> > 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.
> >>>>
> >>>> _______________________________________________
> >>>> Tesla mailing list
> >>>> Tesla@xxxxxxxxxx
> >>>> http://www.pupman.com/mailman/listinfo/tesla
> >>>>
> >>> _______________________________________________
> >>> Tesla mailing list
> >>> Tesla@xxxxxxxxxx
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> >>
> >> _______________________________________________
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> >>
> > _______________________________________________
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> >
>
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