"Some old radios" is an interesting phrase. The only "old" radios capable of receiving the expanded band are old marine band radios. I had one when I was a kid and thought it was really cool that I could hear 1590 so clearly, not realizing why.I'm wondering that myself. This guy, who's in L.A., has featured it in many of his antique radio restoration videos. For example, at 29:00 in this one:
It's in the Expanded Band, because some old radios don't go high enough to tune it in.