First the good news: I was able to pull in WCCO 830 AM in Minneapolis from my home here in metro Detroit for the first time. (That's approximately 540 miles.) I'm using Exray's version of a Hiker's set along with a loop antenna which is basically a hula-hoop with five turns of #22 magnet wire, a dual 365pf variable cap and one single turn of litz to inductively couple the set to the magnet wire. I'd been trying to get that station for quite some time now, so I'm happy with the results.
I noticed that the signal can be peaked using the variable capacitor in the loop antenna circuit, but only if I'm using one of my simple regen sets. When I hook the loop up to one of my spotter radios, I don't get a peak. Anyone hazard a guess as to why that it so?
I didn't find the right solution from the internet.