RE: Geek Group Cap mod

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

Original poster: "by way of Terry Fritz <twftesla-at-qwest-dot-net>" <jim-at-jlproduction-dot-com>

Hi Bert,all,
I don’t expect to get 80KV, heck I only have two 9KV NST's. I was just
going by what the site said and using their building technique. They
claim this design will be perfect for a 15/60 and they rate this cap at
80kv/.0125 mfd.
Would someone take a look and see if I misunderstood the internal
wiring?
The parallel/series thing always screws me up.
http://www.thegeekgroup-dot-org/Flash/how%20to/bucket%20caps.html

Thanks,
Jim


-----Original Message-----
From: Tesla list [mailto:tesla-at-pupman-dot-com] 
Sent: Sunday, May 05, 2002 1:40 PM
To: tesla-at-pupman-dot-com
Subject: RE: Geek Group Cap mod

Original poster: "Bert Pool by way of Terry Fritz <twftesla-at-qwest-dot-net>"
<txsharpie-at-prodigy-dot-net>

Regardless of how many bottles there are, if they are in parallel, as in
the
photo at the posted web site, then the rated voltage is the voltage of
one
bottle.  Tesla himself had great difficulty operating thick champagne
bottles
at 20kv (CSN, 08-11-99) - no mere beer bottle is going to withstand
80kv. 
6,600 volts would be a good estimate of a voltage one bottle might
withstand. 
If you expect to get 80kv, you'll have to wire 12 or 13 bottles in
series, not
parallel.  And by putting 12 or 13 of them in series to get the higher
voltage
rating, your capacitance will be 1/12th or 1/13th that of one bottle.
You are
going to need 144+ bottles to get 0.014 at 80 kv.
Bert

At 12:39 PM 5/4/2002 -0600, you wrote:
>
> Original poster: "by way of Terry Fritz <twftesla-at-qwest-dot-net>"
> <jim-at-jlproduction-dot-com>
>
> Hi Bert
> I'm confused. If 12 bottles are rated 80KV/.0125MFD then how can 14
> bottles be only 6,600?
> Jim
>
>
> -----Original Message-----
> From: Tesla list [mailto:tesla-at-pupman-dot-com] 
> Sent: Friday, May 03, 2002 10:40 PM
> To: tesla-at-pupman-dot-com
> Subject: Re: Geek Group Cap mod
>
> Original poster: "Bert Pool by way of Terry Fritz
<twftesla-at-qwest-dot-net>"
> <txsharpie-at-prodigy-dot-net>
>
>
> >[snip]
>
> >  The GG page says it is
> >rated at. 0125 MFD -at- 80KV. I divided these numbers by the 12 bottles
> >they had and got-
> >.00104 MFD for EACH bottle and 6,666 volts EACH. I then multiplied
> these
> >numbers by my 14 bottles and got-
> >.01456 MFD and 93,324 volts.
> [snip]
>
> Jim Layton
> >http://www.jlproduction-dot-com/Tesla.html
>
> Jim, this will be painful news, but your capacitors are in parallel,
> which 
> means that the voltage rating on your cap as it is constructed is
6,666 
> volts - NOT 93, 324 volts.
>
> Bert