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AM/FM Radio Tuning methods


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Would like to know if there are any good websites about AM/FM tuning methods......?

Although I have worked on this stuff for quite a few years, I still keep on trial-and-error methods for fine tuning.....

And what are the sensitivities standard for AM/FM radio?? (I have several info but different factories have differenct standard........)

Anyway, Thanks first ;D

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Thanks for reply.

I can tell you that I am currently working on digital tuning system, that is, a PLL+VCO. However, it is quite different from that of manual tuning using capacitor, esp. matching RF coil part.

I know that for radio sensitivity, mostly it related to circuit layout and component placement.... but I just hope to find an effective way to reduce the trial-and-error time. ::)

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