I am working on a project which makes use of radio receiver. I want to use the IC TA 2003 but I can't see where to buy two-pin ceramic filter or discriminator. I could only by the three legged one but not the two. Is there any circuit or device that I can use to replace it? Can crystal oscillator replace it and what frequency range? All these Ta2003 circuit contain it and I don't know why. The two attached files gives pictorial view of my problem. Thank you.
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