Re: SSTC, what to build!

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

Original poster: "Liviu Vasiliu" <teslina-at-yahoo-dot-com> 

Hi
I got 8 inches sparks with a 4 turns heavy wire
primary tightly wound at the secondary bottom, with a
half bridge with two IRFP260N FETs (200 V -at- 46 A), 120
Vac input, full rectifyed, a 470 uF-at-400 V DC bus cap,
with interrupter (C=2.2 uF, 10 kohms pots for ON and
OFF times...up to 24 msec ON times).
  The driver schema is almost identical with that found
on Steve Ward page:
  http://hot-streamer-dot-com/srward16/mini_SSTC.htm

  And mine it is not the best design. Look here:
http://www.geocities-dot-com/teslina/minisstcpage.html

  So you have place to go....
  If you dont have high current FETs you can easy
parallel 460s.

vasil
 >
 >
--- Tesla list <tesla-at-pupman-dot-com> wrote:

 > Original poster: "Kreso Bukvic"
 > <kreso.bukvic-at-kc.htnet.hr>
 >
 > It was very wierd. It worked ok when i limited it
 > with a 100 W lightbulb. As
 > soon i remowed the lightbulb the fets exploded. I
 > tried even with 30 primary
 > turns and no luck. Maybe because i didnt have proper
 > GDT cores then...
 >
 > What is a maximal spark that could be expected with
 > a halfbridge with
 > IRFP460 (500 V 20 A).
 >
 > With TL494 and halfbridge of IRFP450 (500 V 10 A) i
 > got ~ 25 cm with alot
 > heating in the bridge in CW mode :)
 >
 >
 >