Re: Flyback Driver PCBs

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

Original poster: "Jim Mitchell" <electrontube-at-sbcglobal-dot-net> 

I actually never measured but at around 900va, I can pull maybe a 4" arc?

Regards - Jim Mitchell
----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Wednesday, April 14, 2004 10:19 PM
Subject: 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 > > >  >  > >  >  > >  >  > >  > >  > >  > >
 >  >
 >  >
 >  >
 >