#31 mix
This part of Fair-Rite #31 mix is a ferrite core with an O.D. of 19.9mm and an A.L. of 14mm. It is designed for use in low-frequency (<200 MHz) chokes, power supply inductors, filters and baluns. These cores provide good inductance properties without the need for large physical core sizes. They can be used in applications where the core must fit within space constraints.