#IARU HF

The IARU HF World Championship is an annual HF contest in which regular stations send a signal report and an ITU zone. Official headquarters stations of the member societies send the abbreviation of their society instead of a zone. Both ITU zones and HQ stations are multipliers under the rules of the contest. Articles under this tag explain the exchange, the difference between ITU and CQ zones and the mistakes that cost credit. Always check the current official rules for categories, dates and scoring.