calculating copper plate indutance (fwd)

["Tesla list" <tesla@xxxxxxxxxx>]

---------- Forwarded message ----------
Date: Thu, 20 Sep 2007 23:11:43 +0100
From: Chris Swinson <list@xxxxxxxxxxxxxxxxxxxxxxxxx>
To: Tesla list <tesla@xxxxxxxxxx>
Subject: calculating copper plate indutance

Hi all,

I am thinking about using copper strips for my primary, however I can't find 
how to work out the inductance. The only online calculator I can find is for 
solid wires.

Or is there a simple way to convert a area to a wire dia ?  The planed 
copper area will be 2" wide( or 50mm) , 0.8mm thick. Can that be crunched 
into a solid wire dia ? Also I am not sure if the inductance would be the 
same from a plate to a wire anyway ?

Trying to keep inductance and resistance down to a minimum. Even though 
copper tube is the norm, I am wondering if 50mm of copper sheet will greatly 
reduce the inductance and resistance ?  I think it has to ? The larger sheet 
area should work better at higher frequency's due to skin effect ?

I know some will say its not worth going for copper plate over copper tube, 
though I am using low voltages so even a few milliohms can cause a serious 
reduction in power. Inductance I want to keep low also. I calculated at 10V 
input the turn off spike would be 2KV into about 2uH. Really want to keep it 
below 1uH if possible. Though like I said I am not sure if plate will be 
better or worse then wire. I think overall it should be better ?

Cheers,
Chris