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BS 4257:1967
M00000005
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BS 4257:1967 Specification for the dimensions of E-cores made of ferromagnetic oxides for use in telecommunication and allied electronic equipment
standard by BSI Group, 12/29/1967
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Dimensions of E-cores and I-cores made of ferromagnetic oxides (ferrites). The geometric tolerances of the E-cores are specified by form gauges. An appendix describes the calculation of the effective parameters.Cross References:
BS 2856