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copper

Again, it is important to make a review of the laws of induction. An electrical field generates a magnetic field, perpendicular to the electrical windings, at least when AC is applied. Your primary windings in the transformer is AC and this directly applies. The magnetic field, in turn, generates an electrical field ad it is this field I am trying to address. Normally, the steel will carry the electrical field but because it has high resistance, it "slows" the transfer of the magnetic field. Use of a thin copper layer seems to "speed" up that magnetic field.

I have used copper tape to apply this to many things magnetic in nature, particularly mu metal and it gives a more lively sound with better transient attacks. If you go to various websites which sell mumetal "kits" for experimentation, it is one of their more consistent recommendations. Magnetic material needs the copper lining.


again, YMMV,

Stu

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