All QSLs will be send via bureau.
Adress for direct is: Czech radioclub
P.O.BOX 69
CZ-11327 Praha 1
Czech Republic
After several years activity with OL4HQ callsign we decided to change number in prefix in compilance to current year. Please note this year we will be active during IARU HF World Championship as OL4HQ on each band and mode.