an intermediate frequency circuit includes an intermediate frequency tuning circuit which resonates parallel to an intermediate frequency signal , a n − 1 channel trap circuit connected to the output of the intermediate frequency tuning circuit , for removing voice signal components of lower neighboring channels , an intermediate frequency amplifier connected to the output of the n − 1 channel trap circuit , for amplifying the intermediate frequency signal , and an intermediate frequency signal resonance circuit connected to the output of the intermediate frequency amplifier , wherein all the components are formed on a circuit board . in this case , the coupling state of the components connected between the input and output of the intermediate frequency amplifier on the circuit board is selected , and a picture portion in a frequency characteristic of the intermediate frequency circuit is set to a peak .