Re: Capacitance of a coil

Tesla List wrote:

> ... I could of
> course use Medhurst's formula (is there a table for H/D ratio > 5?), but
> I wanted to know if there's another way to calc it too.
> BTW: It's only going to handle metric units!

Here is a more direct formula, by Medhurst too, and in metric units:
L=coil length in meters, R=coil radius in meters.
capacitance=(11.26*L+16*R+76.4*sqrt(R*R*R/L))*1e-12 Farads

Antonio Carlos M. de Queiroz