Can you limit the bandwidth of those chips?
You can't with the chips used on those ISA
PC card FM receivers.  That makes listening 
to narrow band FM basically impossible
least in San Diego, CA USA.  That's because
we have soooooo much FM communications
going on.  My little ICOM IC-Q7 does an
OK job, though.  I don't think  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 «
> > ---------------------------------------------«
> >