If the spacing you want is like FM broadcast, you're fine.
But, if you want to receive commercial wideband (data?) FM,
I think you may be in for a surprise.  If there are not
too many signals nearby then you can get narrow band FM,
just not very loud.  Been there with those little chips.

GL,
Walt...WA6FEC

-----Original Message-----
From: Milan Pavlica (YU7AEC) [mailto:mpavlica@PTT.YU]
Sent: Tuesday, May 09, 2000 12:19 AM
To: PICLIST@MITVMA.MIT.EDU
Subject: Re: FM receiver using PIC as station scanning


I need something like a wide band receiver...
Like scanner...

"Quitt, Walter" wrote:

> Can you limit the bandwidth of those chips?
> You can't with the chips used on those ISA
> PC card FM receivers.š That makes listening
> to narrow band FM basically impossible
> least in San Diego, CA USA.š That's because
> we have soooooo much FM communications
> going on.š My little ICOM IC-Q7 does an
> OK job, though.š I don't thinkš a hobbyist
> can pack as much guts into as small a package
> as that is.
>
> GL OM DE WA6FEC
>
> -----Original Message-----
> From: Milan Pavlica (YU7AEC) [mailto:mpavlica@PTT.YU]
> Sent: Saturday, May 06, 2000 9:25 AM
> To: PICLIST@MITVMA.MIT.EDU
> Subject: Re: FM receiver using PIC as station scanning
>
> Hi!
> Is there any way to build some scanner (eg from 100MHz to 500MHz) with PIC
> which can be interfaced with those Philips TSAxxxx or simmilar IC?? - I2C
> bus
> I would like also to build some radio amateur receiver (and tranceiver)
> which can listen "above" amateur frequencies...
>
> Brian Aase wrote:
>
> > I did such a project a couple of years ago.š Too bad I can't
> > send the schematic,š it belongs to a former employer.
> > I used a chip set from Sanyo (three IC's -- PLL, receiver,
> > and stereo demodulator).š The PLL is very easy to control.
> > We had a Sanyo CD-ROM with all the data sheets and app
> > notes.š You might want to contact the Sanyo rep in your
> > area and see if you can get one.š It would have all the
> > info you need.
> >
> > Philips makes a number of one-chip FM receiver IC's.
> > Likewise their CD-ROM has all the app notes.
> >
> > The toughest problem I ran into was finding the magnetics
> > (mostly for the AM section).š If you're doing FM only, your job
> > will be a lot easier.
> >
> > Brian Aase
> >
> > > Hi to everyone!
> > >
> > > Oppss!...Am I on the list? ping...pong! Okey I'm in the list.
> > >
> > > I like to assemble an FM radio with digital tunning. Now i would like
> > > to use PIC 16F84 as auto station scanning instead ofš manual scanning.
> > >
> > > With this, I would like to us some of the PIC and FM circuits designer
> > > that where i can find a free schematic diagram of a digital tuning FM
> > > receiver.
> > >
> > > If there is a free FM circuits receiver then i modify it so that the
> > > PIC will be the controllers of the station scanning. I know that the
> > > Digital tunnig is being controlled by PLL(phase lock loop), using the
> > > PIC I can extend its capabilities of a simple FM receiver to more
> > > enchancement such as timer off and remote controlled.
> > >
> > > Thanks in advance!
> > >
> > > Best regards,
> > > -=jug=-
> > > ---------------------------------------------«
> > > š URL: http://www.geocities.com/juggernutzš «
> > > š Email: juggernutz@yahoo.comššššššššššššššššššš «
> > > ššššššš juggernut@crosswinds.netššššššššššššššššššš «
> > > ---------------------------------------------«
> > >