Interestingly, my on 8270.0025 Hz carrier transmissions during the last three evenings
 Jan 20, 18:00 - 23:00 UT,
 Jan 21, 15:28 - 23:00 UT,
 Jan 22, 13:23 - 23:00 UT
left three dots on Stefan's 47 uHz spectrogram http://www.iup.uni-heidelberg.de/schaefer_vlf/DK7FC_VLF_Grabber2.html .

This is astonishing because the tree-receiver is currently connected to a north-south oriented loop, whereas I am due east in a null. So I was wondering whether reception was made possible by skywave with rotated polarisation? Perhaps reminiscent of the playful colour changes on Stefan's MF colour-DF grabber.

Despite much lower noise background, the (shorter) daytime carrier
 Jan 22, 07:00 - 10:00 UT.
left no trace at all.

Best 73,
Markus (DF6NM)