On 03/17/2014 02:29 PM, Michael Black wrote:

FM stations apparently can use something around 26 MHz for remote feeds,
but I don't know the details other than it has come up in one of the
newsgroups before, someonehearing FM broadcasting in the wrong place.

Do those things do any conversion, or is it straight to baseband?

From my understanding, the tuner chip sends out an 8MHz (I think)
"window" of information at zero-IF to the modulator/interface chip
(RTL2832U). I did see a 28.800 crystal on mine when I opened it up to
put in some shielding, though.

Unfortunately I am rather new at all of this, so I'm not really up to
speed on radio stuff yet.

If it
converts to some other frequency first, then maybe you are seeing an
image. And since those things aren't so well tuned, so image rejection
might not be so great. That doesn't explain why the wrong frequency
would have a stronger signal.

Find out if it converts to an IF first, then do some math.

Thanks,

Jon