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Ceramic Rado
A ceramic rado filter is an electronic filter capable of resonating at a fixed frequency. It consists of a special ceramic, which is often the zirconium titanate. The resonant frequency of the filter and its bandwidth are determined by the nature, size and thickness of the resonating material. A ceramic rado filter usually has 3 pins: input (E), mass (M) and output (S). On some models, the entry is marked with a red dot. The input signal is injected between E and M, the output signal is taken between S and M. There are also models with two pins (such as quartz) and multi-element filters, which allows a more high selectivity. The ceramic rado filters are used in virtually every type superheterodyne radio receivers in the intermediate frequency amplifier, because they are compact, accurate and cost (about 50 euro cents). They are also found in VCRs, telephones, remote controls. 10. 7 MHz filters for receiving radio frequency modulation in the FM band 88-108 MHz (with a bandwidth of about 200 kHz). They are generally used in combination with the IF transformers. Indeed, ceramic rado filters have, like the quartz, the property also resonate at multiple frequencies of the resonant frequency, while the IF transformers do not have this defect, but they have another: they are quite unselective. Copyright Text is available under Creative Commons attribution share alike, other conditions may apply. See Terms of Use for more details and credits graphics. If reused texts of this page, see how to cite authors and include the license. Wikipedia ® is a registered trademark of the Wikimedia Foundation, Inc. . Charitable organization governed by section 501 (c) (3) of the Tax Code of the United States. . . .
