There is now, we believe, substantial evidence that the primary, largest free energy of the universe appears as magnetic energy of force-free fields filling the walls and voids. A recent compilation of ~100 giant radio lobes indicates minimum energies of field and particles so large, by so many orders of magnitude compared to any other feasible or suggested sources that only the formation energy of the massive central black holes of every galaxy is the feasible location for its origin. The origin of this field is not yet fully explained, but an alpha - Omega dynamo driven by the accretion disk is one possible plausible explaination. Our attempt to model this dynamo in the laboratory at NM Tech using liquid sodium will be discussed.