The Stewart Warner with the 12BE6 sounds great at work (I repaired the speaker and replaced all caps), and when I put an long wire antenna on it across my cube, I pick up the last AM station in mid-PA with music, "country gold" WI00 @ 1mhZ.
During the day, the SW'a reception in my shop was awful, just the two local sports-yak stations boom in loud and clear. Even my outdoor wire was not bringing much else in.
I'll try building in a loop for this little guy.
Tonight I'll work on the GE, which uses the 12AU6 as oscillator-converter.