  A closed form analytic solution is found for the electromagnetic field of the
charged uniformly rotating conducting disk for all values of the tip speed $v$
up to $c$. For $v=c$ it becomes the Magic field of the Kerr-Newman black hole
with $G$ set to zero.
  The field energy, field angular momentum and gyromagnetic ratio are
calculated and compared with those of the electron.
  A new mathematical expression that sums products of 3 Legendre functions each
of a different argument, is demonstrated.
