Re: Flyback Driver PCBs

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

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

----- 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 > >
 >  >  >
 >  >  >
 >  >  >
 >  >
 >  >
 >  >
 >