Apple Disk II Analog Board

[Tony Duell]

> 
> 
> The Apple Disk II analog board has a couple of toroid cores on the
> board; does anyone know what the permeability is, or better, what would
> be the equivilent Amidon number would be?

The official schematic shows 5 inductors : 

L1, L2 30uH
L3, L4 470uH
L5 68uH

I guess you could count the turns of the existing windings, remmeber that 
L is proptional to n^2, and thus get the specific inductance (probably 
more use than the permiability) that way.

-tony