Re: tesla's colorado lab

["Stefan Richter" <Stefan.Mac.Richter-at-t-online.de> (by way of Terry Fritz <twftesla-at-uswest-dot-net>)]

Hi Mike,
in an old german book I found the following notes: 1 cm = 1.11pF
    Greetings from Germany
    Stefan Richter

Tesla list schrieb:

> Original poster: Hollmike-at-aol-dot-com
>
> In a message dated 8/14/2000 4:26:56 PM Mountain Daylight Time,
> tesla-at-pupman-dot-com writes:
>
> >
> >  285,000 cm was the amount of inductance mentioned for the two turns of the
> >  primary.  I was just looking at that section that discussed the second
> >  (cylindrical) primary/secondary form.  I don't immediately see the
> >  calculated inductance of the secondary, but I know it's in there- I just
> >  don't have time to look for it because I'm on my lunch hour.
> >
>     There is a simple conversion from centimeters to henrys.   I will have to
> look at my old notes, but it is something like simply dividing the
> centimeters by 100 million or something like that.  It is derived from the
> classical physics formula for inductance of a long solenoid, which, when all
> the units are simplified, results in centimeters. This was then given the
> name henrys after dividing by the large number(which I cannot remember
> precisely this early in the morning).   I am sure there was some error in
> Nickola's calculations for inductance, due to the low aspect ratio, but it
> was what he had to work with in his day.
> Mike