20 Jan
2005
20 Jan
'05
5:26 p.m.
Thanks Tony! The toroids are L1 and L2, and knowing they are 30 uH helps
out a LOT! Since they are colored yellow, I am guessing they are iron
powder. The application I have in mind is harmonic surpression on 80 M
transmitters; hate to see good parts go to waste :).
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