2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/29494The ac losses in a silver-gold alloy sheathed Bi-2223 tape were measured by the null calorimetric method while a dc current was superimposed onto the ac current. As expected through computer simulations, a Clem valley was observed for the larger ac currents. A reduction of ac losses of approximately 50% at the valley minimum is observed in accord with the calculations. At lower ac currents, the data fit the calculated behavior with a single parameter, a Meissner current of 21.8 A. It is shown that a surface barrier current is incompatible with the data.7 pages, 6 figures, CEC-ICMC 99 (Montreal) IB6 - minor changesSuperconductivitytext