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CQ Magazine, November 2021 -- "Rules for Foxhunting and a Recap of the 2021 CQ Worldwide Foxhunting Weekend"
- "'Why were those radio direction finding (RDF) sets impounded?' That was the question I received in an e-mail from Kirk Groeneveld, KC8JRV about my August column."
- "Since the first World Championships in 1980, there have been detailed rules that are written and approved by representatives of the participating nations through a committee of the International Amateur Radio Union (IARU)."
- "There are lots of other ARDF regulations designed to insure uniformity and fairness as well as to minimize confusion. The latest rules for USA championships fill 32 pages."
- "The latest versions allow for competitors to pre-position their own spare receivers, batteries, headphones or other components just beyond the starting line in the starting corridor, plainly marked with the owner's name."
- "One area of controversy in ARDF rule-making concerns the use of devices with GPS. Having a GPS map display on the course would be an unfair advantage, of course."
Joe Perrigoue K7KCE and Liam are off to find the two-meter fox transmitters during the Foxhunting Weekend event at Hillcrest Park in Fullerton, California. Read more about Foxhunting Weekend 2021 and the international rules for radio-orienteering in Homing In for November 2021.
Homing In, CQ Magazine, August 2021 -- "International ARDF Event Update and a New 80-Meter Set"
- "Unless you are standing right under a long power line or within inches of a big metal fence, the bearing you get on 80 meters is almost always accurate."
- "Besides providing consistent bearing accuracy, eighty-meter ARDF equipment is smaller and easier for young people to tote around, compared to two-meter gear."
- "A more compact magnetic antenna for 80 has multiple turns of wire on a small rod of ferrite material. There is a null when either end of the rod 'points' toward the signal source."
- "Entry-level 80-meter ARDF sets have direct-conversion receivers. Incoming signals pass through a stage of tuned RF amplification to a diode mixer. The mixer output is at baseband."
- "Since the local oscillator (LO) in a direct-conversion receiver is very close to the signal frequency, radiation from the local oscillator can interfere with the fox signal on nearby receivers."
The new RX80M ARDF set from British Columbia fits nicely into the palm of a hand. Read a review of this new 80-meter direction-finding tool in Homing In for August 2021.
Homing In, CQ Magazine, May 2021 -- "ARDF Makes a Comeback in 2021"
- "In places where traveling was permitted, there were restrictions against gatherings that kept hunters quarantined in their cars, unable to mingle at the hidden transmitter site or go to a restaurant afterward."
- "Many parks were closed last year and permits for events were unavailable in the ones that were open."
- "Vaccines are making it safer to gather and restrictions are now being loosened."
- "Large, heavily wooded sites with clear running spaces among the trees are ideal for ARDF. There should be some trails, but competitors need to be able to go cross-country as well."
- "In years when the ARDF World Championships take place in the fall, USA's national championships are normally in the spring to facilitate selection of ARDF Team USA and provide time for training. Anticipated COVID travel restrictions will prevent that sequence this year."
Fullerton Radio Club's almost-annual Antennas-In-The-Park foxhunt is a CQ Worldwide Foxhunting Weekend tradition. Jenna and Robert Canillas, WWØMAN and AD6XJ are ready to try the two-meter ARDF short course. Learn more about the renewal of hidden transmitter hunting activities in Homing In for May 2021.
Homing In appeared monthly in 73 Magazine from November 1988 until the magazine ceased publication with the September 2003 issue. My column then appeared in CQ VHF magazine, a quarterly publication, from 2004 through Fall 2013 and CQ-Plus Digital Magazine during 2014. Now it appears four times per year in CQ Magazine, which is available in print by subscription and in Amateur Radio Stores. You can also subscribe to CQ in digital form, viewable on PC, Mac, iPad, iPhone and Android. I welcome your input for future articles, so please continue to send me your news of mobile and on-foot transmitter hunt activities.
The Fine Print: This is the official Web site for Homing In and other KØOV articles about RDF, but not for any magazine. Homing In articles are produced independently in southern California. Text and artwork of all articles Copyright © Joseph D. Moell. All rights reserved.
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This page updated 6 November 2021