@ Carl ....
A few stories here. You might find them interesting.
I moved here to NE PA from near JFK Airport some 22 years ago, equipped with a Lafayette HA-600 and a 4-foot NRC loop. I had always done a lot of exact-midday DX back in those centuries, and for several years was pleased with the reception at the new digs here. I believe I logged just about every AM station in Eastern PA except for two or three, either at midday or at sunset .....
I bought a re-fitted Hammarlund 180 a year or so back. I'd gotten a check, decided to get gay (carefree), and got one of the finest receivers ever ......
My buddy and his wife stayed for a week on Cape Cod several months back. For reasons I'm sure were sensible to him,
the ever-prepared Vinny brought along one of those 80's Radio-Shack portables -- with batteries.
Of course, almost predictably, there ensued a :45-minute or so area blackout.
Vinny tells me that, despite the abrasions he got after having dived for the portable, he had never heard the AM dial so quiet. He eMailed me with the largesse he'd heard......
Some of my best AM catches, notably the closest-unheards from annoyingly stubborn stations, were from that midday.
Point I'm trying to make is that the AM daytime dial has gotten so gosh-darned NOISY the past 7-8-9-10 years that it's impossible (for me, anyway) to find anything worthwhile to pursue.
Forget about the Xerox programming on AM nowadays; that's another issue.
I can try using the HQ 180, or one of two GE Superadio 2's, or the more recent Grundig S450 in the house and wind up with nothing but aggravation. The racket caused by all the computerized devices -- even in our small town -- is prohibitive.
So if you wanna pursue some daytime AM DX, the suggestion is to get a good portable, stuff it with batteries, find some field nearby your house that's far from the madding crowd, and spin dial.
Boombox's directive about the external loop makes complete sense to me -- if I lived in a house where the property is 200 feet deep and I could operate the distant loop via some grotesque pulley.
Find some meadow in late June, bring a reputable portable and batteries, perhaps a pitcher of mint juleps and a hammock, and enjoy the radio silence.
And try not to be arrested while waving this appartus around, lol.