Magnetic properties of mechanically compacted glassy metal powder cores are presented. The powder size ranges from about 2/-lm to 2 mm. The compositions of the powder materials are Fe78B13Si9, Fe4oNi38M04B18 and C072.2Fe~.8M02B15Si5; the magnetostriction values of these are 30, 9, and 0.5 ppm respectively. The cores compacted with and without oxide binders are in a toroidal form. The effects of powder size, binder, value of magneto stricti on and consolidation conditions on the properties are discussed. It is shown that cores made from near-zero magnetostrictive powders exhibit core loss of about 12 W!kg and permeability of about 1600 at f = 5 kHz and Bm = 0.2 T, which are comparable to those for Ni-Zn ferrite cores. 3566