Re: solid state magnifier ---

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

Original poster: "Malcolm Watts by way of Terry Fritz <twftesla-at-qwest-dot-net>" <m.j.watts-at-massey.ac.nz>

Hi Mike,
          A little while ago, I looked into pros and cons of using 
IGBTs instead of bipolars or MOSFETs for a switchmode cap charger and 
found that most are disappointingly slow. For the proposed design I 
eventually settled on some well-spec'd bipolars which serendipitously 
came my way.

Regards,
malcolm

On 9 Oct 2001, at 12:45, Tesla list wrote:

> Original poster: "Mike Depot by way of Terry Fritz <twftesla-at-qwest-dot-net>"
<mike-at-ici-dot-net>
> 
> Have you considered using IGBTs instead of MOSFETs?
> 
> I thought the first two pages of this doc were interesting...
> http://www.onsemi-dot-com/pub/Collateral/AN1541-D.PDF
> 
> Thoughts, anyone?
> 
> ----- Original Message -----
> From: "Tesla list" <tesla-at-pupman-dot-com>
> To: <tesla-at-pupman-dot-com>
> Sent: Tuesday, October 09, 2001 10:05 AM
> Subject: Re: solid state magnifier ---
> 
> 
> > Original poster: "by way of Terry Fritz <twftesla-at-qwest-dot-net>"
> <Pyrotrons-at-aol-dot-com>
> >
> > Thank you all for your comments and suggestions for the solid state stuff.
> > And the hydrogen part is quite interesting too ; )
> >
> > To Robert H: Yes, 3055's do suck, my best friend Aron Koscho has always
> used
> > TV horizontal transistors instead. He gave several to me a long time
> > ago......the suckers are rated 1500 volts. TO-3 case too. I'm guessing the
> > RCA 40411 you're referring to is some type of horiz. output xstr also...
> >
> > This solid state stuff kicks some serious ***. As soon as I actually got
> > some output from that base-driven resonator, I was thrilled, and really
> was
> > inspired to do more. A while back, Aron gave me four IRF840's........500V
> -at-
> > 14 amps or so, and I'm in the process of building a circuit around them.
> The
> > circuit is on Richie Burnett's website at:
> >
> > www.richieburnett.co.uk
> >
> > I breadboarded the TL494 (NTE replacement chip is NTE1729) and associated
> > circuitry for it, the output looks great. I'm going to build the current
> > amplifying part tomorrow (push-pull with TIP3055's and TIP42's......Richie
> is
> > using ZTX450's and ZTX550's but I'm hoping these xstrs will work since
> they
> > are NPN and PNP and have similar ratings......I'm hoping to "Americanize"
> his
> > original design)
> >
> > ; ( last night I killed the chip (5 bucks) when I accidentally shorted the
> > output for about 3 seconds.....I knew when I heard that snapping/cracking
> > sound the chip was toast. And it was ; (
> >
> > Anyhow, after the driver is finished I will attempt the MOSFET H-bridge.
> Aron
> > built Richie's half-bridge coil driver...........it's beautiful and works
> > great....and now I know what cores (for the two isolation transformers) to
> > use for MY circuit --- the ones HE used of course! I can't wait to get
> this
> > thing up and running.
> >
> > If you've never seen a SSTC operate before, you need to. It is a trip.
> Quiet,
> > powerful...and HOT. It looks like someone built a fire on top of the
> > topload.......
> >
> > Check out the MPG on Richie's page......the output of his SSTC is melting,
> > and burning, the tool steel from a screwdriver. Great video. Thanks Richie
> > for the massive amount of information on your site. It has been my bible
> for
> > the past month or so for SSTC work. Alan Sharp also has some great stuff,
> > although it's a little more complicated IMHO.
> >
> > Later,
> >
> > Justin Hays
> > KC5PNP
> > G-3 #1150
> > Email: pyrotrons-at-aol-dot-com
> > Website: www.hvguy-dot-com
> >
> >
> >
> 
> 
> 
>