[Ralle2405]

Hello at all,

the last days ( and nights ) i searched for a tool to calculate copper band air coils. I found a nice online calculator for wire air coils and now I wanna ask You: Do any one knows a same tool like this ( wire coil calculator ): http://www.pronine.ca/multind.htm

Ok, lets explain:

I know the inductance i want to wind ( for example: 0,10mH, 0,12mH, 0,15mH......)
I know the core tube diameter ( example 8mm outside, 6mm inside for the screw hole )
I know the foil width ( example 17mm copper band )
I know the thickness of copperfoil included the isolation foil thickness ( complete thickness is 90µm)

But....I dont know the needed length of copper band included the dielectric foil.
How to calculate this lenghts?

I wanna thanks to all posts.
Ralf