An experimental rig allowing us to perform AC loss measurements, on short (10 cm) tape samples of high-temperature superconductor Bi-2223/Ag, was designed and tested.We propose a new set-up in order to determine AC losses in multilayer superconducting coils. We made a comparative AC losses study of an isolated tape and of the same tape in the same conditions except for the proximity of another tape, with and without current, located just over the first one. We present a serial of results obtains from different tapes, first we used multifilament BSCCO tape (1G) and YBCO tape (2G) with ferromagnetic substrate.