a t i o f,, w a s 0. 6 5 , h a d a t h e r m a l c o n d u c t i v i t y v a l u e a b o u t O.ZW/cmK a t 77K. This value is :as low as t h a t of Cu-Zn. I t w a s f o u n d t h a t thle t h e r m a l c o n d u c t i v i t y o f the t a p e was close to the calculated oiie based o n f s c and the independently measured thermal c o n d u c t i v i t i e s , o f t h e A g-A u a l l o y a n d t h e Bi-22 2 3 s u p e ir o n d u c t o r .Th e s u p ercon d u c t ing t a pes sheathed with the alloy were c o n f i r m e d to be s u i t a b l e f o r t h e a p p l i c a t i o n a s power c u r r e n t leads.