Not meaning to diminish Mike M's reception in Europe of a 5-watt station broadcasting from Central USA -- if he has a QSL I will eat this post and apologize to him -- but so many AM stations nowadays, especially those former daytimers now allowed on at night, forget to throw the switch. The FM side gets all the attention, all of the phone calls, and all of the maintenance.
I don't believe that my 10 PM reception of 1280 from Alma MI several years back, for example, during a yawning and casual tune of the GE SR II, was from an actual 56 watter, for example. No, not a station from the North. No, not my DXing skill. No, not some sort of magic funnel. Alma MI forgot to flip 'er. Pure and simple.
But the subject of DXing American AM radio in Europe is always fascinating. There *has* to've been a series of 'regulars' -- pests -- from stateside here in the logboooks of many a European DXer.