Interesting question. I read posts from folks who claim all of these fantastic catches from places like Europe, Morocco and Saudi Arabia, but I've never caught any trans Atlantic dx, not even 198 on LW. Not even from the coast of Maine. And, I've worked it with some pretty decent portables - but using the antennas that come with the units. Having been to the UK a number of times, I have an idea of where to look - but with no success from here.
My grandfather told me (back in the 70s) that you could get LW stations at night when at the beach, and maybe you could at one time. However, I have yet to copy one from the US. Over here, that band is generally the province of aeronautical beacons (bloops and beeps). And, all of the fierce electrical interference that's everywhere over here is no help.
I'd imagine that those who do claim trans-Atlantic DX catches are working with $4000 tabletop receivers and antennas that criss-cross half of their backyard. At the minimum, you'd need the latter - and a
very selective receiver of some sort.
From the European side, I understand that you can pick up certain stations that most Americans cannot (like WWZN Boston). That's because we have some 50 kw stations that are directional toward the north Atlantic at night in order to protect co-channel stations that are located inland. So, they are beamed right at you.
I get a laugh when reading reception reports from Ireland where they're picking up 1510 from Boston at night when I would have difficulty getting them from New Hampshire - a mere 50 miles away! Pretty ironic. With their programming being what it is, no one is listening to them in Boston anyway!
