2The International Amateur Radio Union (IARU) Represents the interests of Amateur Radio operators worldwideIs the international organizing body for ARDFIARU Region II is the regional organization for the American continent, the Caribbean, and some islands of the Pacific
3What is Amateur Radio Direction Finding (ARDF) Sport of finding radio transmitters on foot, using radio receiver, map, and compass in diverse, wooded terrain.ARDF joins orienteering skills like the proper use of topographic maps, compass skills, and locational awareness, with radio direction finding skills using hand-held portable receivers and antennas.
4How does it workCompetitors carry portable radio receivers with directional antennas with which they try to find the transmitters.
5How does it workCompetitors must punch a card they carry with them at each transmitter to prove they have found it.
6How does it workA typical ARDF course will be four to ten kilometers long.Competitors start in five minute intervals, so everyone hears transmitter number one when they first turn on their receivers.Winners are determined by those who find the most transmitters in the fastest overall time.
7How does it workEach transmitter sends a simple Morse code identification for one minute before going silent and the next transmitter, in sequence, sends its identification for one minute.Each transmitter is therefore silent for four minutes at a timeLocating a hidden transmitter is done by taking bearings and signal strength indications from multiple locations.
8ARDF competitors are divided into classes based on age and gender There are nine classes:D19 (women 19 years old and younger,)D21 (any women,)D35 (women 35 years old or older,)D50 (women 50 years old or older,)M19 (men 19 years old or younger,)M21 (any men,)M40 (men 40 years old or older,)M50 (men 50 years old or older,) andM60 (men 60 years old or older.)Anyone can enter D21 or M21 regardless of age.The only class that must find all five transmitters is M21.The D19, D21, D35, M19, M40, and M50 classes must find four transmittersThe D50 and M60 classes must find three transmitters.
9RULES IN AMATEUR RADIO DIRECTION FINDING PART A – ORGANIZATIONPART B – COMPETITIONRULES FOR CHAMPIONSHIPS
10Part A Organization http://www.ardf-r1.org/ardf_rules 1. Definitions2. General provisions3. Event program4. Event preparations5. Participation6. Costs7. Event information8. Entries9. Jury10. Complaints11. Protests12. Media service13. Event reports
11Part B Competition Contents: 14. Categories 2 15. Training / model event 216. Starting order 217. Team officials’ meeting 318. Terrain 319. Courses 320. Restricted areas and routes 421. Maps 422. Equipment used by competitors 423. Control cards and registering devices 424. Start 525. Transmitters 526. Transmitters arrangement 627. Finish and time-keeping 628. Results 729. Prizes 730. Fair play 7Appendix 1: Technical Specifications for Amateur Radio Direction Finding Equipment 9Appendix 2: Principles for course planning 10Appendix 3: Approved control cards and registering devices 12Appendix 4: IARU ARDF International Class Referees 13Appendix 5 : Start list preparation 14Appendix 6: Rules for Youth Regional ARDF Championships 16Appendix 7: Rules for ARDF Sprint EventAppendix 8: Rules for ARDF Foxoring Event
14TOC Using Yagi antennas for RDF Building and using VHF quad antennas Direction indicators for mastsSearch/Rescue agenciesInterferometer techniquesAirborne hunting techniquesWeak signal techniquesClose-in sniffing techniquesBuild the Shrunken Quad for sniffingBuild the Sniff-Amp field strength meter for sniffingInternational-rules on-foot foxhuntingCreating rules for mobile huntsHiding tricks to foil huntersBuild tone/ID boxes for hidingAdcock RDFsFixed site RDFingRDFing from satellitesTracking down cable TV leakageTracking down power line noiseCommercial/military RDF setsComputerized triangulationDealing with jamming and malicious interferenceUsing Yagi antennas for RDFBuilding and using VHF quad antennasReviews of commercial dopplersPlans for the Roanoke DopplerMarine RDF equipmentLoops for HF and VHFExternal S-metersAudible S-metersReview of the Little L-Per RDFPlans for the Happy Flyers RDFReview of the BMG SuperDFEquipment takealong listsMaps and triangulationCooperative huntingExternal attenuators, with circuitsInternal attenuators, with circuitsPlans for an automatic attenuatorVehicle mountings
18AARC First Annual Fox Hunt April 28, Rain date next day or next week Check morning of eventStart Time 10:00 AMTransmitEnd Time 12:00 PM –meet at club 12:30 PMAwards – Certificates first, second, third placeFellowship of HAMs