A 17m long transmission line test loop has been built and tested at Fermilab to investigate conductors for the low field (2 Tesla) VLHC magnet. The system is basically a large current transformer which generates currents in excess of 100kA in a single turn superconducting secondary via inductive coupling from a 96-turn water cooled copper primary winding. A forced flow of pressurized liquid helium is used to investigate conductors in the (5 – 8)K temperature range. A 4 m long replaceable straight section of the loop is used to insert a sample of a test conductor. Three conductors have been tested thus far: (1)- the main loop conductor which is an assembly of 18 SSC inner dipole cables, (2)- the “baseline” conductor design for the transmission line magnet which is assembly of 16 SSC outer dipole cables, and (3)- an experimental Sumitomo Nb3Al cable. Both conductors made of the SSC cables have been successfully operated up to 100 kA currents, and their quench characteristics have been measured. Future tests will include a “conductor starved” assembly with only 8 SSC outer dipole cables, a braided NbTi cable, and possibly an indirectly-cooled conductor and/or a modified Nb3Al conductor.