During the month of May (2018) a lot of Belgian club stations can use callsigns in the format OT70xxx. (The xxx is always 3 letters, for example our club station uses OT70TRA.)
In WSJT-X it seems impossible to set this call as 'mycall'; the call gets truncated.
Any clues how we could solve this? Except for making QSOs with all text in 'free text'?