Re: First light with 833 tube coil, then silence

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: "Gerry  Reynolds" <gerryreynolds@xxxxxxxxxxxxx>

Hi David,

I might be missing something, but the schematic looks like the 
secondary of T1 is connected to the plate thru the primary of the 
TC.  It seems like half of the time, the plate voltage will be 
negative and I dont see how that would work.  Doesnt the T1 secondary 
need to be rectified and filtered first??

Gerry R


> 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