Re: SSTC, what to build!

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

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 :)


Best Regards

Kreso Bukvic
----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Sunday, November 14, 2004 8:34 PM
Subject: Re: SSTC, what to build!


 > Original poster: "Liviu Vasiliu" <teslina-at-yahoo-dot-com>
 >
 > Hi Kreso
 > Steve Ward mini-SSTC IS very reliable. It has to be an
 > explanation why your setup didnt work (bad design for
 > driver circuit, bad components). I built it and it
 > worked the first time. I incorporated it in a DRSSTC
 > and work very well. Self tuned SSTC, with
 > enable/disable function are great for demonstrations.
 >
 > teslina
 >  >
 >  >
 > --- Tesla list <tesla-at-pupman-dot-com> wrote:
 >
 >  > Original poster: "Kreso" <kreso.bukvic-at-kc.htnet.hr>
 >  >
 >  > Well i figured out i do not have a reliable small
 >  > SSTC for demostrations (
 >  > friends callin all the time :)).
 >  >
 >  > So i decided to build a toy only for my self ( like
 >  > Dan Stroher Elesyum).
 >  >
 >  > Im thinking about 2 designs:
 >  >
 >  > Stewe Ward-s mini SSTC
 >  >
 >  > + Autotune, interupter
 >  > -Not reliable ( never worked good for me)
 >  >
 >  > Richie-s TL494
 >  >
 >  > +Reliable, never killed a fet
 >  > - no interupter, i have to retune it before evry run
 >  >
 >  > What do you suggest? I buyed a plasmasonic board and
 >  > completed it all (
 >  > Thnaks Terry ) but it seems like this project is
 >  > going to be abused forever
 >  > because i cannot get that FET-s. 30$ per piece is
 >  > expensive (+ customs 72
 >  > % ) wih. Is there a way to find these fets more
 >  > inexpenisve?
 >  >
 >  > Thanks for any answers.
 >  >
 >  > Best Regards
 >  >
 >  > Kreso Bukvic
 >  >
 >  >
 >  >
 >
 >
 >
 >