Re: Pole Xfrmer, what is the best voltage choice???.....

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

Original poster: "david baehr by way of Terry Fritz <twftesla-at-qwest-dot-net>" <dfb25-at-hotmail-dot-com>


Yes, but if I series them, I'll need 8 /60mil caps. My 8" coil used 2 R.Hull
caps for approx. .036-.038. Kinda strange, thoes caps held up for many 5kw
runs, up to 2or 3 minutes at a time, but when I was playing with a small (3"by
12") coil with a 12kv neon it shorted out one of the caps......bad timing
or???????????
Maybe instead of  7600v , maybe 9000v-10,000v??? or I'll just keep the 'ol
14400
>From: "Tesla list" 
>To: tesla-at-pupman-dot-com 
>Subject: Re: Pole Xfrmer, what is the best voltage choice???..... 
>Date: Thu, 01 Nov 2001 08:27:46 -0700 
> 
>Original poster: "by way of Terry Fritz " 
> 
>In a message dated 10/31/01 11:36:35 PM Eastern Standard Time, 
>tesla-at-pupman-dot-com writes: 
> 
> > I've purchased another 14400/5kva like the one I sold a few years back. Now

>I' 
> > m 
> > having second thoughts about the voltage.A few years back I remember seeing

> > Mark Graalmans "Pandora" coil performing very well with a 7500v or so 
> > transformer.....this lower voltage makes cap construction a bit easier, my 
> > last 
> > coil used the tcbor 60mil rolls....and I held my variac to 200v for 12kv 
>to 
> > the 
> > caps, but I've read even then they are on the limit......60mil would have 
>an 
> > easy time at 7600v...........should I keep the 14400 or trade for a 7600???

> > Whats the pros and cons????....It will be used for a 8" to 10" dia. coil 
> > THANKYOU!!!!!!! 
> 
>I'd say definitely use the higher voltage. If you use the higher 
>(double) voltage, the cap value can be just 1/4 the value, for 
>the same overall bang size. So the capacitor will 
>actually be no larger, (use two physically smaller caps in 
>series), and you'll get the tremendous advantages 
>that higher voltage operation provides, (fewer gap problems, 
>lower gap losses, etc.) 
> 
>John 
> 
> 
> 


----------
Get your FREE download of MSN Explorer at http://explorer.msn-dot-com