Radio O (Amateur Radio Direction Finding, or ARDF)


U.S. National ARDF Championships

The 2019 National Championships are being planned by Backwoods O Klub for July of 2019.


April 20 — Free Beginning ARDF Learning Session

Southern California Amateur Radio Association (SOARA) will host a free beginner ARDF (Radio-O) event in Mission Viejo, California. It's a great event for anyone who wants to try Radio-O for the first time, and equipment will be available to borrow. Find out more at:

IARU Region 3 ARDF Championships

The 2019 IARU Regional 3 ARDF (Radio-O) Championships will be held in Wuxi, China, hosted by CRAC, 21-27 September 2019.


ARDF World Championships

The 20th ARDF World Championships will be held in Serbia in 2020.



Team USA at 2018 ARDF World Championships

updated 11 Apr 2019