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Re: [TCML] aluminum magnet wire

Hi Jim, yep, agree with regards to a "secondary" coil! Here is a Javatc look at a loaded 5" x 22" coil and the main parameters affected between copper and aluminum.

Secondary Coil Inputs:
5" x 22", 900T, 24Awg, 6.25" x 21" toroid:

DCR Cu        DCR Al
30.1 Ohms     48.1 Ohms

ACR Cu        ACR Al
95.7 Ohms     152.7 Ohms

Q Cu          Q Al
305           191

I don't have any issues in the primary using aluminum, but the secondary is obviously a draw back due to the high turns.

Take care,

Jim Harvey (UDN) wrote:
The difference between CU and AL is:

                     CU           AL
AWG (26) assumed
Diameter             0.0159 in     0.0159 in
Circular Mils        254          254

P, ohms/cm^3         1.72E-8      2.82E-8

Ohms/1K feet         40.81        67.0

Skin depth = 66200 / sqrt(F) microns
Skin Depth, 250 KHz  132 microns  132 microns

SNIP SNIP (further derivations)
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