RE: First light with 833 tube coil, then silence

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: "Cameron B. Prince" <cplists@xxxxxxxxxx>

Hi David,

As for the controller, I assume you are getting power and pulse indicators,
and if so, just make sure you've got the green wire grounded and the black
wire connected to the filament. You might try swapping which filament leg
you are connecting it to. But I wouldn't worry too much about this until you
get the coil going again in non-staccato.

I would ground one leg of the filament (you may have to experiment with
which leg you ground - I ground the pin with the flat edge). Then I would
try swapping the connection of the grid coil. In some instances, I've
noticed that the direction of this coil would prevent oscillation.

Good luck and let us know how it goes.

Cameron

> -----Original Message-----
> From: Tesla list [mailto:tesla@xxxxxxxxxx]
> Sent: Saturday, September 23, 2006 7:31 AM
> To: tesla@xxxxxxxxxx
> Subject: First light with 833 tube coil, then silence
>
> Original poster: "David Rieben" <drieben@xxxxxxxxxxxxxxx>
>
> Hi all,
>
> Finally got the VTTC all wired together and tried out
> first light tonight. Was having trouble with the stacato
> driver as I couldn't get too much of anything out with
> the stacatto driver energized. I did start getting about
> 8" continous "swords " with the variac turned up to
> about 120 volts and drawing 20 amps (w/out stacatto).
> Didn't seem too efficient but this is my first time with
> a VTTC, ever. It's basically patterned after Steve Ward's
> 22" 833A VTTC:
> <http://www.stevehv.4hv.org/VTTCfaq.htm>http://www.stevehv.4hv.org/VTTCfaq
> .htm
> the third picture down. At least it did work some until
> I started trying to vary the resistance in the grid leak
> bypass resistor (R1). Now all of the sudden it won't
> put out anything, nada, zilch! I tested that resistor,
> the capacitor C2, and even tried swapping out 833A
> tubes, all to no avail. Every component checked out
> good and changing out the tube with spares didn't
> solve the problem either. Can any of you vauum tube
> gurus help me out here? :^))
>
> Thanks,
> David