Hello,

I'm trying to design a multi-layer solenoid wrapped on a steel or iron
core. A physics book I have lists the equation for a single layer solenoid.
On the internet I've found several equations for multi-layered air core
solenoids; these equations are greatly simplified and don't take in account
a value for the relative permeability of the core (I guess I could multiply
L by mu_r, but I'm looking for something authoritative).

Also, can anyone suggest a good reference book for this sort of
question. Everything I have on hand is severely lacking, even my ARRL
handbook let me down! Any insight or hints would be greatly appreciated, I
don't want to wind a bunch of solenoids just to reach the inductance value I
want...

Thanks, Matthew.

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