Re: new single 833A VTTC

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

Original poster: "Steven Ward" <srward16-at-hotmail-dot-com> 

The staccato is to keep plate dissipation within the limits of the tube.
The output sounds like bassy thudding, and at maximum power there is a 
little more mid to the tone of the output, but mostly bass.  If you look at 
my site you will see i have used several other transmitting tubes in my 
other VTTCs:

http://hot-streamer-dot-com/srward16/

Also, i think if i add more capacitance to the plate supply i can achieve 
24" sparks.  Its getting better at hitting 22" now at only 115VAC on the 
input.  I plan to go up to about 130VAC input, but the arcs are breaking up 
at 115.  So i think a stronger supply is in order to get the very maximum 
output... this is at least what ive experienced in all of my setups.

As for the voltage on the plate... your guess is as good as mine.  MOTs are 
typically 1800-2200VAC.  Im running a doubler circuit, so it might be 
around 4000-4500V depending on how much the coil is loading the supply.

Steve


>From: "Tesla list" <tesla-at-pupman-dot-com>
>To: tesla-at-pupman-dot-com
>Subject: Re: new single 833A VTTC
>Date: Mon, 22 Dec 2003 20:33:06 -0700
>
>Original poster: brent meyer <res095fx-at-verizon-dot-net>
>
>Incredible pictures, Steve.  I think I may try a version of this one myself.
>The stacatto generator necessary to keep the plate dissipation within
>reason?  This would be my first foray into a VTTC, I built mostly small
>coils before, the idea of no spark gap noise is intriguing to me.  What does
>the output sound like?  The classic RF sizzle?  Have you measured the
>frequency of the output at all?  And why the 833?  Had you considered using
>any other transmitting tube types?
>Also, it may be informative to know your primary voltage .  Very nice
>design.
>
> > From: "Tesla list" <tesla-at-pupman-dot-com>
> > Date: Sun, 21 Dec 2003 21:39:54 -0700
> > To: tesla-at-pupman-dot-com
> > Subject: new single 833A VTTC
> > Resent-From: tesla-at-pupman-dot-com
> > Resent-Date: Sun, 21 Dec 2003 21:47:17 -0700
> >
> > Original poster: "Steven Ward" <srward16-at-hotmail-dot-com>
> >
> > Hey guys
> >
> > just build a new VTTC the other day with great success.  Whats funny is
> > that just the single 833A does nearly as much as when i had 2 of them on my
> > old coil... obviously the dual 833A VTTC was NOT optomised.  Im running the
> > filament a bit hot (10.5-11V) so this may help its performance.  So far it
> > has worked excellent up to 22" of spark.  I can run at 15pps with only a
> > slight redness of the plate. 20 and 30pps is possible at only 18" sparks.
> > Its still rather nice looking though and worked pretty good from the start.
> > I will add component values to this page later, but check it out:
> >
> > http://www.hot-streamer-dot-com/srward16/833AVTTC.htm
> >
> > There may be some more spark left in it still, if i make any improvements i
> > will post them ;)
> >
> > Steve Ward
> >
> >