Hello Riccardo, VLF! Looks like I have something! After weighted stacking of 3 nights of 3 char transmissions EbNaut software produce decode : ebnaut-rx V0.7a input file C:\EbNaut\IW4DXW\sum
Stacking may be a problem Alex. The transmit phase may not be repeating each night. It is a great distance: 2078 km over land, a difficult challenge - even if the stacking was possible. Your decode i