This afternoon I tried to receive something at 10,140.2 kHz in WSPR mode.
I'm being a bit OT here, as that frequency is not classifiable as LF, but
the results are directly applicable also to the 137 and 500 kHz segments.

I received, in half an hour of testing, the stations reported below.
Listening to what I was receiving, *NOTHING* could be heard,
only background noise, as those stations were well below the noise.

So the claims that CW can do what WSPR can, are *completely* unfounded.

73  Alberto  I2PHD

1506 -10  3.5  10.140138  3 EB1APK IN73 20
1506 -26  1.4  10.140190  4 IK5FKF JN54 37
1508 -26  1.4  10.140242  1 K1JT FN20 37
1510 -10  1.3  10.140130  1 OY4TN IP62 33
1512 -14  3.5  10.140148  1 EB1APK IN73 20
1512 -20  1.3  10.140205  0 G4TRA IO81 30
1516 -16  1.7  10.140196  0 RA6AS KN93 37
1520 -17  1.4  10.140136  0 OY4TN IP62 33
1520 -24  1.3  10.140210  0 G4TRA IO81 30
1522 -31  3.5  10.140153  0 EB1APK IN73 20
1522 -26  1.3  10.140250 -1 ZL3IN RE66 30
1528 -29  0.5  10.140217  0 HB9TJM JN36 37
1528 -29  1.4  10.140253  0 K1JT FN20 37
1530 -23  3.4  10.140155  0 EB1APK IN73 20
1530 -27  1.8  10.140271  0 VK2SRO QF56 37