OK, so we think we have a possible reason for the interference. Now, if the
OP will please describe for me what sort of antenna (s)he has on the
RECEIVER, I'll make a best guess as to how to mitigate the problem.

And no, in response to another post, if a device certified to part 15 and
still meeting part 15 standards interferes with another part 15 device,
neither interferer nor interferee is responsible for cleaning up any
interference. Or, in English, if my little transmitter is screwing up your
little receiver, I ain't gotta do nothing about it.

As for selling knock-off unlicensed transmitters, last I looked nobody in
their right minds is going to expose themselves to a $10K fine for each
device so sold. I defy anybody to go into a store anywhere in this country
and buy a little FM transmitter (they sell them in K-Mart and WallyWorld)
without a certification sticker on them and the FCC type cert number.

Jim



The OP is in California bay area. Oakland Center in that area is
125.45. Southwest Airline flies to SJC, so it all makes sense...
Case solved.

-Nathan