FER RITE CORES FOR RFI SUPPRESSION Following is a list of large size Fer rite Beads (FB), Fer rite Thyroidal Cores (FT), and Split Fer rite Cores {2X), alt of which are extensively used for RFl problems involving multiple wire bundles, coaxial cables, microphone cables, AC cords, and computer ribbon cables. These larger fer rite beads and thyroidal cores can provide larger iD to accommodate the larger diameter coaxes and wire bundles. The 43 material is a good all around material for most RFl problems.