High power low frequency coils

A multi-layer inductor coil, comprising:

• a coil form comprising:
• a coil form center, and
• a plurality of coil form extensions radially extending from the coil form center, each coil form extension elongated in an axial direction;
• and
• a continuous wire filament wound on the coil form extensions, the continuous wire filament thereby forming a plurality of radially spaced apart concentric winding layers;
• wherein each winding layer comprises a plurality of turns extending in the axial direction;
• and
• wherein a cross-section of the plurality of radially spaced apart concentric winding layers forms a triangle in the disposition of the continuous wire filament.