Re: SSTC newbie

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

Original poster: "Sundog by way of Terry Fritz <twftesla-at-qwest-dot-net>" <sundog-at-timeship-dot-net>

Very impressive coils, very neat layout!

  What surprises me is that these look almost exactly like a VTTC running 
on a voltage doubled MOT!

   The only differences, the SSTC sounds more raspy.  The VTTC has a steady 
hummm to it, and the SSTC has a definite 60hz "pop" while it's running.  I 
attribute that to the sharper switching times vs a tube coil (the grid 
voltage in a tube coil rises comparatively slowly as the primary charges 
it).  Higher power levels on a VTTC using a doubler get that raspy pop, 
because there's more current available to charge the grid cap, and it pops 
the tube off quicker.

   The sparks look very close.  The SSTC's sparks move around a lot more 
than the VTTC's tend to.  Arcs to a grounded rod look very different 
though.  My VTTC's arcs to a grounded object look like an NST's arc on the 
dual 833A setup, and the Quad 833's arcs looked like they were pulled from 
a polepig.  Thick, yellow, and snake-like.

   I'm going to buy probably 16 MOFSETS, and run 8 total (unless I get 
adventurous, a twin SSTC?)

   Looking around my junkbox, I noticed a large 5V power supply from an 
ancient server.  It has superb filtering, but more importantly, 2 largeish 
ferrite core transformers, 1 small ferrite core transformer (square cores 
and bobbins), and 4 toroidal transformers, 1 large, 1 medium, 2 
small.  I'll pull it part later and put them all on the O scope and signal 
generator to see how and where they operate.  I can't see any worthwhile 
MOFSETS in there, but there are some pretty impressive LV power 
transistors.  Scavenging time!

Shad G5-1203

At 07:36 PM 7/30/2002, you wrote:
>Original poster: "Daniel McCauley by way of Terry Fritz 
><twftesla-at-qwest-dot-net>" <dhmccauley-at-spacecatlighting-dot-com>
>
>
>Check out my site at:
>
>www.spacecatlighting-dot-com
>
>It has great stuff on SSTC's.
>
>Also check out Chester's Solid State Site as well a Richie Burnett's site .
>. . it has a wealth of info!!!
>
>Dan
>
>
> >     So begins the wallet-draining venture into SSTC's....I'll get the tiny
> > boxes ready for the MOFSET's funerals...some of them will probably be
> > cremated on the spot and their ashes scattered with canned air ;)
> > Any of the veteran SSTC'ers that want to help are more than welcome to
> > contact me off-list.  Thanks All!
>
>Actually, if you follow closely to some of the designs already proven on the
>web, you really don't need to blow any MOSFETs unless you wire something up
>wrong.