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Re: Flyback Driver PCBs
Original poster: "Malcolm Watts" <m.j.watts-at-massey.ac.nz>
On 14 Apr 2004, at 18:46, Tesla list wrote:
> Original poster: "Jim Mitchell" <electrontube-at-sbcglobal-dot-net>
>
> Yeah I can't even pull that big an arc with my stick welder, at
> 230A...
>
> Regards - Jim Mitchell
One additional note - how wide an arc can you pull with even a
modestly rated NST?
Malcolm
> ----- Original Message -----
> From: "Tesla list" <tesla-at-pupman-dot-com>
> To: <tesla-at-pupman-dot-com>
> Sent: Wednesday, April 14, 2004 7:38 PM
> Subject: Re: Flyback Driver PCBs
>
>
> > Original poster: "Richard Modistach" <hambone-at-dodo-dot-com.au>
> >
> > i've been flatout using all manner of welders since
> > 1975, the best i've been able to get is 10% of
> > that and that was with a hobart-at- 300A and hf.
> > what type of welding machine is this that draws
> > 12" arcs, or are we talking something other than
> > a standard atmosphere?
> >
> > regards
> > richard
> > aus
> >
> >
> > ----- Original Message -----
> > From: "Tesla list" <tesla-at-pupman-dot-com>
> > To: <tesla-at-pupman-dot-com>
> > Sent: Wednesday, April 14, 2004 10:37 PM
> > Subject: Re: Flyback Driver PCBs
> >
> >
> > > Original poster: "Malcolm Watts" <m.j.watts-at-massey.ac.nz>
> > >
> > > On 13 Apr 2004, at 18:01, Tesla list wrote:
> > >
> > > > Original poster: "Jim Mitchell" <electrontube-at-sbcglobal-dot-net>
> > > > > > > WHAT!? Kreso thats 6 & 1/2" arcs from a plasma globe
> flyback?! Those > > > things are tiny 1" cubes that go up in flames
> if you try to get more > > > then a few kV out of them! > > >
> Strangely I am suspicious. Do you have pictures? > > > > > >
> Regards - Jim Mitchell > > > > I can't say I am. As usual, power is
> the driver behind long arcs. > > Another example of a strong power
> dependency is an arc welder. The > > voltage is low by any standards
> but the available power allows one to > > draw arcs out over a foot
> long. Then there is that video of a > > switchyard breaker opening,
> courtesy of Bert Hickman...... > > > > Malcolm > > > > > -----
> Original Message ----- > > > From: "Tesla list" <tesla-at-pupman-dot-com>
> > > > To: <tesla-at-pupman-dot-com> > > > Sent: Tuesday, April 13, 2004
> 9:51 AM > > > Subject: Re: Flyback Driver PCBs > > > > > > > >
> > > Original poster: Kreso Bukvic <kreso.bukvic-at-kc.htnet.hr> > >
> > > > > > > Now for me to spit somthing. I had gotten from small
> cheap > > > commercial > > > plasma > > > > globe flyback ~
> 17 cm flaming arc. I was just keeping this for me > > > but il >
> give the word out. I was driving this flyback from PC SMPS > > >
> so i thinked > > > why > > > > we all use LV output of this
> small transformer? So i connected
> my
> > > > flyback > primary to primary of the transformer i gues there
> was > > > arround 300 VDC. > > > The > > > > flyback gaved 5
> - 6 cm arcs now. After some head scratching i > > > realised > >
> > that > > > > SMPS transformer eated alot of power so i remowed
> it. After > > > turrning on i > realised thet the flyback is
> giving small arcs to
> air
> > > > (like Tesla coil). > Trying to pul an arc i realised it can
> make ~
> 17
> > > > cm flaming arcs. I was > impressed . So i tried to connect
> big DC > > > flyback there and tried to pull a > spark at point of
> ~8 cm the > > > corona appeared but as soon the spark created >
> the mosfets blew i > > > think that wasn ot problem a wire hanged
> and shorted > > > the > > > > output. I never tried this
> experiment later ( need to build a > > > sstc.) > > I know all
> will call me a layer and wont bolive me, but > > > try it im NOT >
> > > lying > > > > > > > > The picture of the flyback can be
> seen here > > > >
> http://www.allthingstesla-dot-com/viewthread.php?tid=766&page=#pid6060
> > > > > > BTW the SMPS was AT 200 W > > Best Regards > > Kreso
> Bukvic > > > > > > > > > > > > > > > > > >
>
>
>