MuRata CFM455B 455kHz Ceramic Radio IF FILTER - NOSのeBay公認海外通販|セカイモン
Simplest 455 KHz Oscillator uses only three parts negative resistance ceramic filter oscillator ceramic resonator oscillator
rf - Is it possible to combine two CFU455IT +/-2kHz (4kHz) ceramic filters to get a +/-1.25kHz bandwith (2.5kHz) filter? - Electrical Engineering Stack Exchange