EE ferrite magnetic core Suitable for pulse transformers, telecommunication, filters etc include EE, EI, ... , FT, ET General Introduction 1, Our high permeability MnZn ferrite magnetic core and NiZn ferrite core include EE, EI, EP, FT, ET, UF, UI ... range of operating frequencies. 5, The suitable frequency range for ferrite core runs from 1kHz to 1GHz, low loss combined with high ...