You might get this chip to go up where you need (150MHz is listed as
the max but you may be able to stretch it):

http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=568-1218-ND

However, be forewarned that the weather radio broadcasts use an FM
deviation of only around 5kHz, instead of the much wider (25kHz?) used
by FM broadcast band transmitters, so some receiver circuits intended
for FM broadcast band will not give much audio output when fed by
narrow-band FM. They also may have way too wide an IF bandwidth,
leading to reception of multiple signals and extra noise.

I like the suggestion which Eric made on the SA626 even better,
though. That looks almost ideal.

The NE602 or SA602 is an obsolete, but still available, IC which is
used in many amateur receiver projects. It is a mixer+oscillator for
basically 0 to 400MHz. You might try searching for it along with other
suitable keywords (FM receiver, receiver, weather receiver, etc.).

You probably won't find a solution which doesn't require some external
inductors. The good news, though, is that this is a fairly nice
territory for inductors. They can usually be just a few turns air
wound and can be adjusted by just bending the turns closer or farther
away from each other.

You should also be able to leverage off-the-shelf ceramic filters at
10.7MHz if you make that your IF frequency.

Sean


On Fri, Dec 11, 2009 at 11:13 AM, Mark <mark@cgmark.us> wrote:
> I have a project where I want to build a custom weather radio for use in
> north america. The band they use is around 162 Mhz. Does anyone know of
> any IC or parts that would make this easier. All the parts I keep
> finding are either no longer produced or very hard to get . I'm hoping
> not to have to build one from discrete parts like a bunch of transistors
> and coils, really hoping there is a chip out there , preferably in dip
> format , that I could add just a few parts to.
>
> Thanks
> Mark
>
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