Re: tesla coil current

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

Original poster: John <fireba8104-at-yahoo-dot-com> 

Hi Jim,
I know your referring to one of Joule's laws where P = I^2*R. Calculate the 
Resistance of the entire secondary circuit at resonance. Input the two 
known variables and solve for I.
This can only give me the maximum current , assuming no losses, but it is 
evident that we are dealing with 19th century technology, a finicky system 
at that, and to assume is to make math useless.
The reason for this inquiry was to have a basics to form a estimate of 
minimum resistance needed in a high voltage probe in order to get 
reasonably accurate results.
I guess the current would in the area of 50 uA RMS . I am very unsure of 
this and seeking the advice of people that have been building coils , in 
some cases, longer then I've been alive.
Thanks,
John
P.S Jim, I happened upon your site and it now resides in my Favorites


Tesla list <tesla-at-pupman-dot-com> wrote:
Original poster: Jim Lux

Deliver to what?
Peak in the discharge from the topload?
RMS in the sparks?
etc...

Peak currents in the spark are fairly easy to calculate. It's going to be
mostly limited by the inductance of the spark channel and the capacity of
the top load, for which a working number of 1 uH/meter would be good.

RMS current in the secondary is likewise fairly easy to calculate, since
you know the power in the system, and you know the inductance of the secondary.

At 08:07 AM 11/4/2003 -0700, you wrote:
 >Original poster: John
 >
 >
 >Hello all,
 >
 >I was wondering if any one could give a reasonable approximation on how
 >much current a 3" medium 2kw TC can deliver.
 >
 >Cheers,
 >
 >John
 >