AM/FM Radio Tuning methods

[trigger]

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

[Kevin Weddle]

Whether you are manually tuning or calculating, doesn't it seem like this is the method which enables you to widdle down a design. You do one and then the other until you are satisfied with the results. I am sorry I can't recommend anything.

[trigger]

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. ::)