Hi Stefan, tnx fer info! On 06.08.19 12:31, DK7FC wrote: ...since a long time. They are at all 4 frequencies now. See http://www.iup.uni-heidelberg.de/schaefer_vlf/DK7FC_VLF_Grabber2.html ... ... and
Right now the Alpha at 11904.7619 is coming quite strong 73 de Luis EA5DOM De: [email protected] [mailto:[email protected]] En nombre de Markus Vester Enviado el: mi
Attached is a short mp3 audio file where you can listen to all 4 tones. Signals coming from the H field were filtered, noise-blanked, down-shifted by 12 kHz and then resampled to 12 kS/s. The recordi