www.DataSheet4U.com Double-Aperture Cores B62152 Double aperture cores Primarily used for broadband transformers up to high frequencies Application examples I SIFERRIT material N30 for low frequencies and for pulse applications I SIFERRIT material K1 for matching transformers and baluns up to about 250 MHz in antenna feeders or in input circuits of VHF and TV receivers Dimensions 1) h b (mm) (mm) a (mm) c (mm) d (mm) Magnetic characteristics Ae 3) Σl/A 3) le 3) V e 3) mm-1 mm mm2 mm3 15,3.