Talk:Amateur radio direction finding

New article
I know this is an obscure sport in most of the English-speaking world, but it has lately seen some growing popularity in the United States, Australia, and the United Kingdom. I would appreciate any feedback on the article, especially from individuals for whom the entire subject is completely new. --Kharker 23:54, 2 December 2005 (UTC)
 * It is completely new to me, and I am very familiar with orienteering! The article looks very well-written and exhaustive; I'll try to go over it in more detail when I have the spare time. Thanks for bringing it to our attention on talk:Orienteering, otherwise I would not have discovered this singularly unique sport. Radagast 20:50, 4 December 2005 (UTC)
 * Based on off-wikipedia commentary, I've reduced the number of wikilinks to those that seem most relevant to the subject matter, and I've avoided repeating wikilinks unless there is a long distance between them in the article.--Kharker 18:33, 14 December 2005 (UTC)

I plan to submit this article as a Featured Article Candidate some time this week. Any comments before than are appreciated.--Kharker 15:49, 5 January 2006 (UTC)

Categories
I suggest to categorize this (and the variants) under radio navigation as well; radio direction finding uses the same principle whether the gear is mounted in a jumbo jet or carried by a runner. Maybe putting this, fox oring and Radio Orienteering in a Compact Area into a separate category, which could be a subcat of both radiosport and radio navigation? --Shaddack 01:09, 6 January 2006 (UTC)


 * My initial consideration of this was that they didn't really fit that category. Radio navigation is all about using radio beacons at known locations to determine your current location, whereas the sports are all about using your known location (through skilled use of map and compass) to locate the radio beacons at their unknown locations.  But, I can see how anyone searching for information on radio navigation would also find these sports of interest, so I've gone ahead and added them to that category.--Kharker 17:01, 6 January 2006 (UTC)

Is the capiton bellow the picture a typo? It reads ..2 meter course.. shouldn't that be 2 kilometer at least? I know nothing about the subject so I will leave it to others to correct in case I am wrong.

No. The 2-meters refers to the wavelength of the radio signal used for that particular event, not the distance to be run. A 2-meter radio signal is approximately 145 megahertz. The other radio wavelength commonly used is 80 meters, approximately 3.5 megahertz. The two wavelength bands have rather different characteristics in terms of the way the signals propagate over terrain and the equipment used to locate the transmitters. For comparison, 2-meter signals are similar in character to FM and TV broadcasts and 80-meters similar to those used for AM standard broadcast. Of course, in ARDF, the transmitter power levels are MUCH lower than broadcast transmitters.

The actual distance run by a competitor in a championship course is typically on the order of six to ten kilometers. --Jay

What a bizarre sport
Congrats to the writers on a job well done. JHMM13 (T | C)  02:37, 12 March 2006 (UTC)

I agree. Interesting article and interesting subject.--Theloniouszen 03:02, 12 March 2006 (UTC)

map
Very nice article on a very peculiar sport. However, can somebody fix the world map? For some reason the thumbnail shows the new multi-colored map but when I enlarged it it points to the one with green shades. Blue Shirts  08:18, 12 March 2006 (UTC)
 * nevermind Blue  Shirts  01:58, 15 March 2006 (UTC)

Malicious
Someone left a "this sucks", so I removed it. Simply noting the edit.

Orienteering WikiProject
Una Smith (talk) 19:07, 14 June 2008 (UTC)

FYI, Orienteering is getting a makeover. Also, Control point (orienteering) could use more information about radio transmitters used at control points to report data; those have potential use far beyond ARDF. Thanks! --Una Smith (talk) 01:45, 8 October 2008 (UTC)
 * I don't understand why this article is a part of orienteering portal/project. IOF doesn't have such discipline http://orienteering.org/i3/index.php?/iof2006/disciplines --Dnikitin (talk) 02:18, 19 January 2009 (UTC)
 * This is about all type of orienteering, not only those recognized by IOF. --Kslotte (talk) 19:45, 18 July 2009 (UTC)

Receivers
The article says the receiver antennas are directional, but what exactly does that mean? If the user gets a bearing on a transmitter, does the bearing have one or two heads (two heads 180 degrees apart)? --Una Smith (talk) 02:04, 8 October 2008 (UTC)
 * I took a stab at improving that section.--Kharker (talk) 21:54, 9 October 2008 (UTC)
 * Vast improvement. --Una Smith (talk) 01:18, 10 October 2008 (UTC)
 * It's a shame for WP, that I could find several pictures of receivers, but non of the for me wellknown electrical schemas. These are very important for well understanding the propagation of electromagnetic waves. 217.255.102.134 (talk) 12:49, 31 October 2014 (UTC)

GPS
The article now makes no mention of GPS, but I think that should go back in, with an explanation about the change in rules. Pro and con of GPS use is a frequently asked question! --Una Smith (talk) 01:18, 10 October 2008 (UTC)

Biographies
Could someone make some biographies of the most successful ARDF orienteers? --Kslotte (talk) 19:50, 18 July 2009 (UTC)

Smaller ARDF formats
At Club level, another form of ARDF is the "Fox hunt", where the "Fox" is hidden, and the other have to find them - as a small scale event, this normally uses the 2 metre band.

For 2 Metre band ARDF, the most common equipment, would be a handheld radio and an antenna such as the HB9CV (a 2 driven element antenna, using a phasing line to achieve a good rear null - the bearing is taken using the null).

Another system, frowned on by some, was the Datong DF1, a 4 element actively phased array and control unit that could be used while mobile. Ace of Risk (talk) 01:19, 18 November 2015 (UTC)

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