1. A close look at my 4 inch diameter Starship Rodin Coil winding jig.\r
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2. A quick look at a few of the coils I have built using this jig.\r
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3. I explain how the magnetic field density/flux density of the starship rodin coil is strongest in the centre of the coil, on the positive side of the coil, so long as the input current is pulsed DC square wave , somewhere in the 10-500KHz range.