ABSTRACT
In this coil there are two windings, primary and secondary. The primary winding consists of a few hundred turns of lacquered copper wire. The secondary winding consists of several thousand turns of thin, lacquered copper wire. The primary winding is wound around the outside of
the secondary winding because the heavier current that it carries generates heat which needs to be dissipated. The layers of windings are normally electrically insulated from each other by a layer of insulating material.
