Results are presented for the current-voltage characteristics of PdDx, which shows a partial superconducting (SC) transition at T-c similar to 7K. The temperature dependence of the critical current is well fitted by the Ambegaokar-Baratoff relation, suggesting the existence of Josephson junctions between the SC grains. The effect of deuterium interactions with defects on the SC state in the PdDx system is discussed.