Keep listening. In North America there isn't much on Long Wave except a
few aviation navigation beacons. And every year, there are fewer and
fewer of them. You may hear a few differential GPS broadcasts.
However, the best time to listen is in the winter months early in the
morning before sunrise. Then you stand a pretty good chance of hearing
the LW broadcasts from Europe.

Which ones are most likely to be heard? What would be a reasonable
antenna for longwave? I've never heard anything but beacons on LW, but
I do like the hunt for them.