Re: Breakdown voltages of toroids

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

Original poster: "Gerry Reynolds" <gerryreynolds-at-earthlink-dot-net> 

Hi Jim,

If p*d is empirically derived,  doesn't one need to specify what the
dimensions are?

Gerry R

 > Original poster: "Jim Lux" <jimlux-at-earthlink-dot-net>
 >
 >  >  > At Jim Lux's website, the breakdown voltage is expressed as:
 >  >  > Vbreakdown = B * p * d / (C + ln( p * d))
 >  >  > http://home.earthlink-dot-net/~jimlux/hv/paschen.htm
 >  >  > <http://home.earthlink-dot-net/%7Ejimlux/hv/paschen.htm>
 >  >
 >  > There is an apparent dimensional error in this formula. p*d doesn't
look
 >  > adimensional.
 >
 >
 > Nope.. it's an empirical relation (and stated as such in my original
source,
 > which, if I didn't credit it on the page, I will fix today), so not
subject
 > to dimensional analysis.. basically, it attempts to fit to the usual
Paschen
 > relation of Vbreak = f(pd), where the product of p*d is the independent
 > variable
 >
 >