... ,EF,EFD,EER,DR,EC,PQ EE CORE Applications:Transformers and chokes for switching power supplies, filter, inductor etc. UF ... :Mainly used for line filters in color TV set. TOROIDAL CORE Applications:Pulse and wide-band transformers, various types of filters, ... B/W and color TV set. EI CORE Applications:Various kinds of transformers and chokes.Antenna ferrite cores,soft ferrite cores,magnetic cores, u ...