[Prev][Next][Index][Thread]
Re: Wheeler (Number of turns for a secondary?)
Tesla List wrote:
> It is a formula for calculating the inductance of a coil. It is
convenient(at
> least for us Americans) as all the dimensions are in inches. The result
is in
> microhenries.
>
> For a single layer solenoid:
>
> L = r^2 * N^2 / (9*r + 10*b)
This is also a translation to inches of the formula in metric units:
L = 4*pi*1e-7*pi*r*r*N*N/(b+0.9*r)
This is simply the formula for the inductance of a long coil (r<<b)
with an approximate correction factor 0.9*r added to the length b.
Antonio Carlos M. de Queiroz