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The frequency range that needs to be suppressed will determine which core material is used. Cores made of a nickel-zinc material respond to relatively high frequencies, suitable for suppressing noise in the FM radio band. Cores made of manganese-zinc attenuate noise at lower frequencies such as in the AM radio band. Additionally, the number of times a wire is threaded through a core brings varying degrees of suppression.

PTM Published on: 2013-11-26