Michael DB6NT and Andreas DB2NP made on 20th July 2020 first-ever QSO on 725Ghz! Congratulation for these great achievement!
More info on German you can find here: http://www.db6nt.de/fileadmin/userfiles/_pdf/download_archiv/Erstverbindung-im-725-GHz-Amateurband.pdf
or on Danish here: https://vushf.dk/forst-i-verden-cw-qso-pa-725-ghz/
Google translate is your friend 🙂
Photo: from DB6NT pdf
