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Notch Filters for Intermediate Frequencies

Effective and selective

Notch Filters for Intermediate Frequencies
In radios designed for long distance communication, a notch filter is used to suppress or hopefully wipe out noise, whistles, buzzes, static, chirps, woodpeckers and what have you that persistently degrade the wanted signal. In this article we cover simple LC and RC notch filters for use in the radio’s intermediate frequency (IF) section.
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