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Amateur

On the Web

Amateur Radio Direction Finding Web Ring - Group for enthusiasts of Radio Direction Finding.
ARDF Holland - Amateur Radio Direction Finding - Amateur Radio Direction Finding in the Netherlands, all about foxhunting
N6QAB's Radio Direction Finding Web Page - Pictures and descriptions of Radio Direction Finding and Transmitter Hunting equipment.
Homing In - All about hidden transmitter hunting and radio direction finding for radio amateurs. Links, and local contacts to help find RDF activities in your area.
Transmitter Hunting - Amateur radio direction finding, transmitter hunting, by triangulating a radio signals direction and plotting its bearing on a map. Hunters use Dopplers for tracking hidden transmitters anywhere in the San Francisco Bay Area.
NoBarc Hounds Amateur Radio Tansmitter hunters - Radio Direction finding for sport and emergencies.
Mac Tronics - Radio direction finding equipment and accessories. Order by phone or mail.
Radio Direction Finding Projects - A collection of useful and interesting projects for the RDF enthusiast by Joe Leggio, WB2HOL
Doppler Systems - Commercial supplier of turnkey doppler based direction finding equipment.
ARDF Poland - The Polish Club of Amateur Radio Direction Finding. Includes contest rules and information. [Polish-English]

Wikipedia Articles

Amateur Radio Direction Finding - Amateur Radio Direction Finding (ARDF) is an amateur map and compass sport that combines the skills of orienteering and radio direction finding. It is a timed race in which individual competitors use a topographic map, a magnetic compass and radio direction finding apparatus to navigate through diverse wooded terrain while ...
Radio direction finder - A radio direction finder (RDF) is a device for finding the direction to a radio source. Due to radio's ability to travel very long distances "over the horizon", it makes a particularly good radio navigation system for ships and aircraft that might be flying at a distance from land.
Transmitter hunting - Transmitter hunting is an activity wherein participants use radio direction finding techniques to locate one or more radio transmitters hidden within a designated search area. This activity is most popular among amateur radio enthusiasts, and one organized sport variation is known as Amateur Radio Direction Finding.
Direction finding - Direction finding (DF) refers to the establishment of the direction from which a received signal was transmitted. This can refer to radio or other forms of wireless communication.
Radio Orienteering in a Compact Area - Radio Orienteering in a Compact Area is a variation of Amateur Radio Direction Finding. ROCA is a timed race in which individual competitors use a topographic map and a magnetic compass to navigate through diverse, wooded terrain while searching for radio transmitters.