Abstract High-temperature superconducting (HTS) double-pancake coils have been fabricated using (Bi,Pb)2Sr2Ca2Cu3O10+ x (Bi-2223) multifilamentary (MF) Ag-clad tapes. The thermal-mechanical processing of Bi-based composites has shown an improvement in the transport properties of composite tapes by optimizing powder stoichiometry, deformation rate and reduction, sintering temperature and duration, and adjusted rate of heat treatment. Ag-clad Bi-2223 MF tapes up to 55 m have been fabricated using the powder-in-tube technique. An overall Ic of ∼7.5 A with a fluctuation along the length of less than 12% was achieved. An improvement in the electrical transport properties of ∼12 mT Bi-2223/Ag wind-reacted HTS double-pancake coils prepared from long partially processed tapes was achieved by means of post-sintering.