Re: dual 833A VTTC, problems

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

Original poster: "Steven Ward by way of Terry Fritz <teslalist-at-qwest-dot-net>" <srward16-at-hotmail-dot-com>

Hi D.C.

Im running the plate chokes of equal turns on the plates.  I think its just 
the fact that the tubes are of different manufacturers.

Does anyone know of a website with Ed Wingate's tube coil?  I havent seen 
it on the web.  I know he does great work, so im sure its a nice coil.  I 
think it was in one of Terry Blakes teslathon videos?  IT looked like a DC 
powered coil.  The sparks were VERY straight, and looked to be quite 
long.  MY arcs are fed with an AC doubler, so they look really nuts in 
person!  Like a tree, with a scorching hot trunk;)  I think i will try the 
tapped grid coil.

Steve Ward.






>From: "Tesla list" <tesla-at-pupman-dot-com>
>To: tesla-at-pupman-dot-com
>Subject: Re: dual 833A VTTC, problems
>Date: Tue, 14 Jan 2003 21:24:21 -0700
>
>Original poster: "Dr.Resonance by way of Terry Fritz 
><teslalist-at-qwest-dot-net>" <resonance-at-jvlnet-dot-com>
>
>
>Are you running equalizing parasitic RF chokes on the plates?
>
>Also, you might check with Ed Wingate as he has an excellent dual 833
>circuit.
>
>Regards,
>
>Dr. Resonance
>
>
>
>----- Original Message -----
>From: "Tesla list" <tesla-at-pupman-dot-com>
>To: <tesla-at-pupman-dot-com>
>Sent: Tuesday, January 14, 2003 5:52 PM
>Subject: dual 833A VTTC, problems
>
>
> > Original poster: "Steven Ward by way of Terry Fritz <teslalist-at-qwest-dot-net>"
><srward16-at-hotmail-dot-com>
> >
> > Hi all,
> >
> > I have been working on my dual 833A VTTC project for a while now.  I just
> > recently fired it up again (after blowing the power the first time a month
> > ago or so) and keep happening upon the same problem.  The tubes are not
> > matched, so one gets more red than the other.  Rather, one tube is red,
>the
> > other dark (no redness).  I found that i originally had way too much grid
> > feedback, so i cut it down quite a bit.  This made the sparks grow from
> > about 10" to about 20".  But even 20" is pathetic for 2 of these tubes :(.
> > Basically what is limiting me is that one tube is getting red, and the
> > other not, so i cant just let all of the stress fall on one tube.  So i
> > have 2 ideas that i propose (I think John Freau actually may have told me
> > these i ideas, i cant remember).  1, perhaps put a resistor in series from
> > the red tube grid to the grid winding.  This would reduce the turn on
>pulse
> > from the grid coil, going into that tube.  2, make a grid coil tap, and
>tap
> > the red tube at a lesser turn until i get them to go red at ~ the same
> > time.  This could be tricky, well actually, either way is tricky!
> >
> > So has anyone ever had this problem?  If so what was the solution?
>Also,
> > can anyone think of any other solutions?  And which of my proposed
> > solutions looks better?
> >
> > Also, a problem that i thought i would not ever have to worry about.
>Well
> > several small problems.  The parts are getting warm.  The primary coil
>gets
> > warm after about 30 sec, the 36A RMS doorknob cap array gets slightly
>warm!
> > the secondary base gets rather hot, and the discharge point may need to be
> > replaced often, if i dont get tungsten :)  These arcs are white, hot, and
> > thick!  So really this coil is becoming a in depth project, when it comes
> > to all of the de-bugging(not nearly as bad as the other tube coils!). And
> > of course, there is always the possibility of catastrophic faliure when
> > running about 2+ KW in a 12"x18" area!
> >
> > Steve Ward.
> >
> >
> >


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