Apple Disk II Analog Board

From: Tony Duell <>
Date: Thu Jan 20 18:25:09 2005

> 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.

Received on Thu Jan 20 2005 - 18:25:09 GMT

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