Re: 500 nf hv capacitor

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

Original poster: "Anthony" <ant17-at-optushome-dot-com.au> 

i mean 0.5uf or 500 nanofarad
----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Wednesday, 7 April 2004 10:36 AM
Subject: Re: 500 nf hv capacitor


 > Original poster: DRIEBEN-at-midsouth.rr-dot-com
 >
 > Hi Pat, Anthony,
 >
 > Anthony stated 500 nFD, not 500 pFD. I don't have the capacitance
 > formula or dielectric K table handy right now but I'm sure 80 sq
 > inches of 1/4" thick glass wouldn't even come anything near to 500
 > nFD of capacitance. 500 pFD I could definitely see, but not 500 nFD.
 > BTW, Anthony, did you actually mean 500 nFD, which is 0.5 uFD, or
 > did you in fact mean 500 pFD? 1000 pFD = 1 nFD and I would imagine
 > that a 500 nFD "homemade" glass-and-oil capacitor that could actual-
 > ly reliably handle 30 kV would literally weigh hundreds of pounds!
 >
 > David Rieben
 >
 > ----- Original Message -----
 > From: Tesla list <tesla-at-pupman-dot-com>
 > Date: Tuesday, April 6, 2004 12:46 pm
 > Subject: Re: 500 nf hv capacitor
 >
 >  > Original poster: Pat Masterson <bat-at-grumman-dot-com>
 >  >
 >  > On Tue, 6 Apr 2004, Tesla list wrote:
 >  >
 >  > >Original poster: "Anthony" <ant17-at-optushome-dot-com.au>
 >  > >
 >  > >hi guys i was wondering if you could help me i want to build a
 >  > 30kvdc 500
 >  > >nf  capacitor i was wondering if any you tell me how i could go
 >  > about >making one
 >  > >
 >  >
 >  >  A classic glass plate capacitor might do well for you. A quarter
 >  > inchthick plate will withstand 60 KV and maybe 80 sqaure inches of
 >  > aluminumfoil would be needed. The exact parameters depend on the
 >  > dielectricconstant of the glass. -pat
 >  >
 >  >