Re: PlasmaSonic II SSTC Board SALE $25.00 EACH or $45.00 for TWO

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

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

No.  I am referring to the TL494 oscillator.  If the coil was out of tune,
the MOSFETs would be hard switching a lot of current.  This is not possible
on a feedback system.

Regards - Jim Mitchell

----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Wednesday, March 31, 2004 9:54 AM
Subject: Re: PlasmaSonic II SSTC Board SALE $25.00 EACH or $45.00 for TWO


 > Original poster: "Eastern Voltage Research Corporation"
<dhmccauley-at-easternvoltageresearch-dot-com>
 >
 > You continually refer to the plasmasonic as it is something unique.  It is
 > not.  The full bridge circuit on the plasmasonic is
 > IDENTICAL to almost every other SSTC full-bridge out there including
 > everyone that you ever made.
 >
 > The drive circuit is also identical in operation to almost every non-self
 > resonant SSTC ever built as well.
 >
 >
 > Dan
 >
 >  > Were the IRFP460's frying because you were running them with the plasma
 >  > sonic?
 >  >
 >  > Regards - Jim Mitchell
 >  >
 >  > ----- Original Message -----
 >  > From: "Tesla list" <tesla-at-pupman-dot-com>
 >  > To: <tesla-at-pupman-dot-com>
 >  > Sent: Tuesday, March 30, 2004 7:12 PM
 >  > Subject: Re: PlasmaSonic II SSTC Board SALE $25.00 EACH or $45.00 for
TWO
 >  >
 >  >
 >  >  > Original poster: Finn Hammer <f-h-at-c.dk>
 >  >  >
 >  >  > All,
 >  >  >
 >  >  > I`m from Denmark, it is Kurt who is Swiss.
 >  >  >
 >  >  > About FET`s, as always the best prices are found on E-Bay, I got
some
 >  > quite
 >  >  > increadible deals there, which allowed me to fry 50 IRF460 before I
got
 > a
 >  >  > full bridge to run reliably. But that source has dried out, it would
 >  > appear.
 >  >  > Another possibility is:
 >  >  > http://www.dalbani.co.uk/index.php
 >  >  > He sells the 460`s for 2.70 UKP not sure if he`s got the IXYS`s.
 >  >  > Certainly, both Farnell and RS-Components are prohibitively
expensive,
 >  >  > asking an outrageus 15 quid apiece.
 >  >  >
 >  >  > Cheers, Finn Hammer
 >  >  >
 >  >  > Tesla list wrote:
 >  >  > >Original poster: "Mccauley, Daniel H" <daniel.h.mccauley-at-lmco-dot-com>
 >  >  > >I believe Finn Hammer (switzerland i think) found a second source
for
 > an
 >  >  > >alternative FET (same package) for
 >  >  > >a reasonable price over there in Europe.
 >  >  > >Dan
 >  >  > >
 >  >  > >  >Secondly, I'm not sure where you got the $80.00 from, but that
 > figure
 >  >  > >is  >clearly incorrect.  You can purchase IXFN44N50 MOSFETs from
 >  >  > >  >Future Active Electronics for $18.50 each.  Its not much more
 >  > expensive
 >  >  > >than  >something like the IRF460
 >  >  > >I think those MOSFET bricks are a lot more expensive outside of the
 > US.
 >  >  > >I've not seen them below about $80 equivalent here in Blighty.
Whereas
 >  >  > >IRFP460s are $5 each, or $40 for a tube of 25 if you know the right
 >  >  > >people ;) So I prefer to buy the IRFP460s and treat them as cannon
 >  >  > >fodder 8-o
 >  >  > >Steve C.
 >  >  > >
 >  >  >
 >  >  >
 >  >  >
 >  >  >
 >  >
 >  >
 >  >
 >  >
 >  >
 >
 >