Re: Flat-Copper-Strip Flat-Spiral-Primary Inductance Calc's?

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

Original poster: "Finn Hammer" <f-h-at-c.dk> 

Tesla list wrote:

>Original poster: "Kurt Schraner" <k.schraner-at-datacomm.ch>
>Hi,
>
>anybody has handy a good method or formula for inductance calculation 
>of  flat-strip flat-spiral primaries? I made one for my little UBTT 
>(Uni-Bern Tesla Twin), which primary can be seen here:
>snip


I used Antonio`s INCA program to calculate the 2-turn primary of my OLTC. 
It was the only program that got close to so small an inductance. I`m not 
sure if this has to do with it being a flat strip primary, but it`s worth a 
try.


>The inductance measurements were done at 1000Hz, with a digital LCR-meter 
>of the "automatic bridge type" (ESCORT ELC131D, Taiwan).


I would not rely on that meter, with so small inductance, before having 
verifyed the measurement with a capacitor across the coil, and then ring it 
up with a sig. gen. waching it with a scope.

My 5 oere