Hi,
I am trying to design a 455KHz IF stage. I would like to use a 455KHz 7KHz
BW ceramic filter. Looking at the Murata data, they suggest that an
additional IFT is used to reduce the spurious responses.
Has anyone used such a scheme?
Does it mean connecting the IFT directly to the output of the filter?

Do I really need to worry about the spurious resonses?
Collins mechanical filters seem to have the same problem, but do these also
usually have an IFT as well?

Thanks,
John.