[Lowfer] LF signals

[Garry]

Plenty of LF signals overnight on the wspr-2 frequencies (474.2 kHz and 
136 kHz). Also, WA2RXM fired up QRSS30 on 479.903 kHz from Colorado. And 
noticed a new NDB signal on 407 kHz. It was decently strong on both USB 
and LSB tones and signed HCD. But rather than send continuously it sent 
4 IDs, then rested, before resuming that pattern. The cycle time was 6.8 
seconds and the tones slowly drifted in frequency (down for USB and up 
for LSB). Apparently this beacon is near Hutchinson/Butler, MN and used 
to be GYL, but that's not absolutely certain.

73, Garry, K3SIW, EN52ta, Elgin, IL