RE: Re: tank circuit of VTTC

["David Trimmell" <davidt-at-pond-dot-net> (by way of Terry Fritz <twftesla-at-uswest-dot-net>)]

Hi Herwig, list,



On Thu, 24 Aug 2000, Tesla list wrote:

> Original poster: "Herwig Roscher" <herwig.roscher-at-gmx.de> 
> 
> 
> 
> David Trimmell wrote to the list:
> 
> > I would seriously think about using two stings of caps, with
> > some 40+ Amps, a single string will heat up on you pretty quick.
> 
> David,
> 
> Thank you for your advice. How much air space did you have 
> around your caps? Some forced air cooling?

..........................................................

I just ran the caps in a series line, terminals pushed through a perf
board and soldered together, no real cooling aside from normal air
convection. If you really do plan on running at 10 KV for any signifigant
time, then I would supose 3-4 parrellel strings would be in order... That
is in a realm I haven't been in.

............................................................

 > 
> > Your #10 awg primary will be a bit overkill, but probibly worth
> > it. 
> - I like overkills  :-)
>  
> > What are your specs for the secondary?
> - For the first steps I'll use a secondary coil from a former project:
> 4" x 26.4", 1300 turns AWG 26
> 
> I'm planning on winding 100 to 300 additional turns of larger 
> diameter to the base of the coil in order to avoid overheating 
> because of the high current in this part of the coil. Later I'll wind a 
> completely new secondary, which will be a little bit higher and will 
> have thicker wire. Would you please recommend some figures?

.............................................................

Sounds good. "I" would try that existing coil, and bring the Voltage up
with a variac incremintially, and monitor temp of all componants, that
should let you test suitability. In my experience with the 833 tubes, I
have found that the limiting factor is the tube (plates getting to hot),
most likely in your case (with that monster tube!) you will be pusing new
ground. Robert Stephens' built a mungo tube coil, perhaps he has something
to say (Robert?). I have a 6"x26" coil with #24 wire that someday I would
like to test, most likely in the level shifting mode...

Good Luck,

Regards,

David Trimmell
www.ChaoticUniverse-dot-com

> 
> Regards
> 
> Herwig
> 
> 
> 
>