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82-531: CQ Amateur Radio previously organized, adjudicated, and publishes the results of several annual radio competitions : All of these contests allow participation by amateur radio operators in any country of the world. While CQ has sponsored these contests, the administration of these contests is now done via independent contest committees under the auspices of the World Wide Radio Operators Foundation (WWROF). WWROF administers

164-523: A web site . Because the competitions are between stations licensed in the Amateur Radio Service (with the exception of certain contests which sponsor awards for shortwave listeners ), which prohibits the use of radio frequencies for pecuniary interests, there are no professional radio contests or professional contesters, and any awards granted by the contest sponsors are typically limited to paper certificates, plaques, or trophies. During

246-456: A "multiplier" based on some aspect of the exchanged information. Often, rules for contests held on the VHF amateur radio bands assign a new multiplier for each new Maidenhead grid locator in the log, rewarding the competitors that make contacts with other stations in the most locations. Many HF contests reward stations with a new multiplier for contacts with stations in each country - often based on

328-665: A "rate" over four contacts per minute on Morse code, or up to ten contacts per minute on voice during peak propagation periods, using this short format. The peak rate of contacts that can be made during contests that employ longer exchanges with more information that must be sent, received, and acknowledged, will be necessarily lower. Most serious competitive stations log their contest contacts using contest logging software , although some continue to use paper and pencil. There are many different software logging programs written specifically for radio contesting. Computer logging programs can handle many additional duties besides simply recording

410-631: A CW-only competition one weekend in May. Some contests, especially those restricted to a single radio frequency band, allow the competing stations to use several different emissions modes. VHF contests typically permit any mode of emission, including some specialty digital modes designed specifically for use on those bands. As with the other variations in contest rules and participation structure, some contest stations and operators choose to specialize in contests on certain modes and may not participate seriously in contests on other modes. Large, worldwide contests on

492-461: A disadvantage, or may measure their own success against only nearby rivals. Many radio amateurs are happy to contest from home, often with relatively low output power and simple antennas . Some of these operators at modest home stations operate competitively and others are simply on the air to give away some points to serious stations or to chase some unusual propagation. More serious radio contesters will spend significant sums of money and invest

574-625: A geographical relationship such as whether or not the communications crossed a continental or political boundary. Some contests, such as the Stew Perry Top Band Distance Challenge, award points are scaled to the distance separating the two stations. Most contests held in Europe on the VHF and microwave bands award 1 point per kilometre of distance between the stations making each contact. After they are received by

656-417: A lot of time building a potentially winning station, whether at home, a local mountain top, or in a distant country. Operators without the financial resources to build their own station establish relationships with those that do and "guest operate" at other stations during contests. Contesting is often combined with a DX-pedition , where amateur radio operators travel to a location where amateur radio activity

738-652: A more level playing field, as all stations are constructed in a similar manner. Contacts between stations in a contest are often brief. A typical exchange between two stations on voice — in this case between a station in England and one in New Zealand in the CQ World Wide DX Contest — might proceed as follows: (Station M2W is soliciting a contact in the contest) (The station calling, ZL6QH, gives only his callsign. No more information

820-478: A portion of the available time. For example, the ARRL November Sweepstakes is thirty hours long, but each station may be on the air for no more than twenty-four hours. The off-time requirement forces competitive stations to decide when to be on the air making contacts and when to be off the air, and adds a significant element of strategy to the competition. Although common in the 1930s, only

902-477: A radio contest, each station attempts to establish two-way contact with other licensed amateur radio stations and exchange information specific to that contest. The information exchanged could include an R-S-T system signal report, a name, the national region, i.e. a province or US state, in which the station is located, the geographic zone in which the station is located, the Maidenhead grid locator in which

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984-410: A rare location close to a major population center. Because the scoring formula in most contests uses the number of different locations contacted (such as countries, states or grid locators ) as a multiplier, contacts with stations in rare locations are in high demand. In contests on the VHF and higher frequency bands, having a location at a high altitude with unobstructed line of sight in all directions

1066-410: A single station, and may either allow for a single radio transmitter or several to be in use simultaneously on different amateur radio bands. Many contests also offer team or club competitions in which the scores of multiple radio stations are combined and ranked. A wide variety of amateur radio contests are sponsored every year. Contest sponsors have crafted competitive events that serve to promote

1148-534: A small error in distance, but makes calculations simpler and, given the inherent imprecision in the input data used, it is not the biggest error source. Until the adoption of WGS 84 as the official geodetic datum of the Maidenhead locator system in 1999, operators had usually specified their location based on their local national datum. Consequently, stations very near the edges of squares (at denoted precision) may have changed their locators when changing over to

1230-494: A small number of contests today take place over multiple weekends. These competitions are called "cumulative" contests, and are generally limited to the microwave frequency bands. Short "sprint" contests lasting only a few hours have been popular among contesters that prefer a fast-paced environment, or who cannot devote an entire weekend to a radio contest. A unique feature of the North American Sprint contest

1312-438: A variety of interests and appeal to diverse audiences. Radio contests typically take place on weekends or local weeknight evenings, and can last from a few hours to forty-eight hours in duration. The rules of each contest will specify which stations are eligible for participation, the radio frequency bands on which they may operate, the communications modes they may employ, which other amateur radio stations they may contact, and

1394-629: A world championship in the sport of contesting, WRTC 2010 took place in Moscow, Russia . The 2014 event was hosted in New England . Next WRTC will take place in Italy. There have been controversies among amateur operators over the impact of dense contest traffic on the popular HF bands, the use of packet cluster systems, log editing, rare station QSYs and other techniques. The scale of activity varies from contest to contest. The largest contests are

1476-458: Is a competitive activity pursued by amateur radio operators . In a contest, an amateur radio station , which may be operated by an individual or a team, seeks to contact as many other amateur radio stations as possible in a given period of time and exchange information. Rules for each competition define the amateur radio bands , the mode of communication that may be used, and the kind of information that must be exchanged. The contacts made during

1558-461: Is a favourite hack for programmers who are also radio amateurs. Perl supports conversion between geographical coordinates and Maidenhead locators in module Ham::Locator by Andy Smith, available on CPAN . The Python maidenhead module is on pypi.org for installation via pip. Many commercially available general purpose (civil) Global Positioning System (GPS) receivers (e.g. Garmin GPS-12) have

1640-575: Is also a major advantage. With range limited to around 1000 kilometers in normal radio propagation conditions, a location on high ground close to a major metropolitan area is an often unbeatable advantage in VHF contests. In the large international HF DX contests, stations in the Caribbean Sea and the North Atlantic Ocean , close to Europe and eastern North America with their high densities of active contest stations, are frequently

1722-449: Is infrequent or uncommon. Several contests are designed to encourage outdoor operations, and are known as field days. The motivating purpose of these events is to prepare operators for emergency readiness, but many enjoy the fun of operating in the most basic of circumstances. The rules for most field day events require or strongly incent participating stations to use generator or battery power, and temporary antennas. This can create

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1804-534: Is needed.) (M2W confirms the ZL6QH call sign, sends a signal report of 59, and is in Zone 14 (Western Europe).) (ZL6QH confirms reception of M2W's exchange, sends a signal report of 59, and is in Zone 32 (South Pacific).) (M2W confirms ZL6QH's exchange, is now listening for new stations.) On Morse code, suitable well-known abbreviations are used to keep the contact as brief as possible. Skilled contesters can maintain

1886-512: Is now in widespread use. Maidenhead locators are still used as part of the formulas for scoring in many VHF amateur radio contests and as the basis of earning awards like the American Radio Relay League's VHF/UHF Century Club , URE TTLOC, etc. operating contests. Under IARU Region 1 rules, VHF distance calculations are carried out between Maidenhead subsquare centres, assuming a spherical Earth. This results in

1968-415: Is presented in a limited level of precision to limit the number of characters needed for its transmission using voice, Morse code , or any other operating mode. The chosen coding uses alternating pairs of letters and digits, like so: In each pair, the first character encodes longitude and the second character encodes latitude. These character pairs also have traditional names, and in the case of letters,

2050-557: Is that the operator is required to change frequency after every other contact, introducing another operational skills challenge. Whatever the length of the contest, the top operators are frequently those that can best maintain focus on the tasks of contest operating throughout the event. Some contests, such as the Maine 2 Meter FM Simplex Challenge sponsored by the Wireless Society of Southern Maine , offer newly licensed hams

2132-563: Is the single operator category and variations thereof, in which only one individual operates a radio station for the entire duration of the contest. Subdivisions of the single operator category are often made based on the highest power output levels used during the contest, such as a QRP category for single operator stations using no more than five watts of output power, or a High Power category that allows stations to transmit with as much output power as their license permits. Multi-operator categories allow for teams of individuals to operate from

2214-597: Is where the alternative name "grid squares" comes from. Each of these squares represents 1° of latitude by 2° of longitude. For additional precision, each square can optionally be sub-divided further, into subsquares . These are encoded into a second pair of letters, which should be presented in uppercase, but are sometimes (incorrectly) presented in lowercase as a legacy from the old QRA. The error has unfortunately been incorporated into various software packages, several examples of which can be seen on this page. Again, to make manual calculations from degrees and minutes easier, 24

2296-599: The 160 meter , 80 Meter , 40 Meter , 20 Meter , 15 Meter , and 10 Meter bands. VHF contests use all the amateur radio bands above 50 MHz . Some contests permit activity on all HF or all VHF bands, and may offer points for contacts and multipliers on each band. Other contests may permit activity on all bands but restrict stations to making only one contact with each other station, regardless of band, or may limit multipliers to once per contest instead of once per band. Most VHF contests in North America are similar to

2378-498: The American Radio Relay League , which had been principal in organizing and publicizing these tests, proposed a new format for the annual event, encouraging stations to make as many two-way contacts with stations in other countries as possible. The 1928 International Relay Party, as the event was renamed, was the first organized amateur radio contest. The International Relay Party was an immediate success, and

2460-599: The California QSO Party). Maidenhead grid locator The Maidenhead Locator System (a.k.a. QTH Locator and IARU Locator ) is a geocode system used by amateur radio operators to succinctly describe their geographic coordinates , which replaced the deprecated QRA locator , which was limited to European contacts . Its purpose is to be concise, accurate, and robust in the face of interference and other adverse transmission conditions. The Maidenhead Locator System can describe locations anywhere in

2542-606: The Morse code for communications, some are restricted to telephony modes and spoken communications, and some employ digital emissions modes such as RTTY or PSK31 . Many popular contests are offered on two separate weekends, one for CW and one for telephony, with all the same rules. The CQ World Wide WPX Contest, for example, is held as a RTTY-only competition one weekend in February, a phone-only competition one weekend in March, and

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2624-452: The "entities" listed on the DXCC country list maintained by the American Radio Relay League ("ARRL"). Depending on the rules for a particular contest, each multiplier may count once on each radio band or only once during the contest, regardless of the radio band on which the multiplier was first earned. The points earned for each contact can be a fixed amount per contact, or can vary based on

2706-505: The 2000 CQ World Wide DX Contest, and the top-scoring single operator station that year, located in the Galápagos Islands , made over 9,000 contacts. Other HF contests are not as large, and some specialty events, such as those for QRP enthusiasts, can attract no more than a few dozen competitors. The geographic location of a station can impact its potential performance in radio contests. In almost all contests it helps to be in

2788-644: The ARRL June VHF QSO Party, and allow contacts on all the amateur radio bands 50 MHz or higher in frequency. Most VHF contests in the United Kingdom, however, are restricted to one amateur radio band at a time. An HF contest with worldwide participation that restricts all contest activity to just one band is the ARRL 10 Meter Contest. Contests exist for enthusiasts of all modes. Some contests are restricted to just CW emissions using

2870-615: The ARRL sponsored a new contest specifically for the ten meter amateur radio band. By the end of 1937, contests were also being sponsored in Brazil , France, Germany, Great Britain , Hungary, Ireland, and New Zealand. The first VHF contest was the ARRL VHF Sweepstakes held in 1948, and the first RTTY contest was sponsored by the RTTY Society of Southern California in 1957. The first publication dedicated exclusively to

2952-410: The CQ World Wide DX Contest, the world's largest HF contest, leading multi-operator stations on phone and CW can make up to 25,000 contacts in a forty-eight-hour period, while even single operators with world-class stations in rare locations have been known to exceed 10,000 contacts, an average of over three per minute, every minute. Over 30,000 amateur radio operators participated in the phone weekend of

3034-538: The Contest Hall of Fame in 1986. By the turn of the century, contesting had become an established worldwide sport, with tens of thousands of active competitors, connected not just through their on air activities, but with specialist web sites, journals, and conventions. Without a single worldwide organizing body or authority for the sport, there has never been a world ranking system by which contesters could compare themselves. The vast differences contesters face in

3116-456: The HF bands can be scheduled for up to forty-eight hours in duration. Typically, these large worldwide contests run from 0000 UTC on Saturday morning until 2359 UTC Sunday evening. Regional and smaller contests often are scheduled for a shorter duration, with twenty-four, twelve, and four hours being common variations. Many contests employ a concept of "off time" in which a station may operate only

3198-549: The Japan International DX Contest (sponsored by Five Nine magazine) may only contact other stations located outside Japan and vice versa. There are also contests that limit participation to just the stations located in a particular continent or country, even though those stations may work any other station for points. All contests use one or more amateur radio bands on which competing stations may make two-way contacts. HF contests use one or more of

3280-531: The Radio Society of Great Britain published a small set of BASIC language routines to convert from locator references to geographical coordinates (latitude and longitude) for further processing. A complete program in BASIC called Universal Gridlocator was made available the following year by ARRL for a nominal cost of US$ 3. Many other utilities exist to convert latitude and longitude to locators, as this

3362-409: The ability to take part in contesting for the first time, by restricting contacts to a single VHF band, and providing entry categories for anything from a handheld radio to a fully equipped contest station. The wide variety of contests attracts a large variety of contesters and contest stations. The rules and structure of a particular contest can determine the strategies used by competitors to maximize

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3444-459: The amateur radio regulations of the country in which they are located. Because radio contests take place using amateur radio, competitors are generally forbidden by their national amateur radio regulations from being compensated financially for their activity. High levels of amateur radio contest activity, and contesters failing to comply with international band plans, can result in friction between contest participants and other amateur radio users of

3526-529: The annual DX contests that allow worldwide participation. Many of these DX contests have been held annually for fifty years or more, and have devoted followings. Newer contests, those that intentionally restrict participation based on geography, and those that are shorter in duration tend to have fewer participating stations and attract more specialized operators and teams. Over time, contests that fail to attract enough entrants will be abandoned by their sponsor, and new contests will be proposed and sponsored to meet

3608-415: The base for the first pair of letters—traditionally called a field —was chosen to be 18, thus dividing the globe into 18 zones of longitude of 20° each, and 18 zones of latitude 10° each. These zones are encoded with the letters "A" through "R". The second pair of numbers, called a square and placed after the first pair of letters, uses a base number of 10, and is encoded using the digits "0" to "9". This

3690-536: The competitive excitement of the event was the primary attraction. The contest, sponsored annually by the ARRL, became known as the ARRL November Sweepstakes in 1962. Another important innovation in early contesting was the development of Field Day operating events. The earliest known organized field day activity was held in Great Britain in 1930, and was soon emulated by small events through Europe and North America. The first ARRL International Field Day

3772-500: The conclusion of a contest, each station must submit its operational log to the contest sponsor. Many sponsors accept logs by e-mail , by upload on web sites , or even by postal mail. Once a contest sponsor receives all the logs from the competitors, the logs undergo a process known as "cross-checking." In cross-checking, the contest sponsor will match up the contacts recorded in the logs and look for errors or omissions. Most contests enforce stiff points penalties for inaccuracies in

3854-625: The contest contribute to a score by which stations are ranked. Contest sponsors publish the results in magazines and on web sites. Contesting grew out of other amateur radio activities in the 1920s and 1930s. As intercontinental communications with amateur radio became more common, competitions were formed to challenge stations to make as many contacts as possible with amateur radio stations in other countries. Contests were also formed to provide opportunities for amateur radio operators to practice their message handling skills, used for routine or emergency communications across long distances. Over time,

3936-589: The contest sponsor, logs are checked for accuracy. Points can be deducted or credit and multipliers lost if there are errors in the log data for a given contact. Depending on the scoring formula used, the resulting scores of any particular contest can be either a small number of points or in the millions of points. Most contests offer multiple entry categories, and declare winners in each category. Some contests also declare regional winners for specific geographic subdivisions, such as continents, countries, U.S. states, or Canadian provinces. The most common entry category

4018-471: The contest, and a detailed listing of the scores of every participating station. In addition to publication in magazines and journals, many contest sponsors also publish results on web sites, often in a format similar to that found in print. Some contest sponsors offer the raw score results data in a format that enables searching or other data analysis. The American Radio Relay League, for example, offers this raw line score data to any of its members, and offers

4100-522: The early 1920s, when amateur radio operators first attempted to establish long distance radiocommunications across the Atlantic Ocean on the short wave amateur radio frequencies. Even after the first two-way communications between North America and Europe were established in 1923, these tests continued to be annual events at which more and more stations were successful in establishing two-way contacts over greater and greater distances. In 1927,

4182-484: The emphasis on emergency readiness and capability has historically outweighed the competitive nature of these events. Modern contests draw upon the heritage of DX communications, traffic handling, and communications readiness. Since 1928, the number and variety of competitive amateur radio operating events have increased. In 1934, contests were sponsored by radio societies in Australia, Canada, Poland , and Spain, and

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4264-441: The errors in their log and how they were penalized. Most contests are sponsored by organizations that either publish a membership journal, or sell a radio enthusiast magazine as their business. The results of radio contest events are printed in these publications, and often include an article describing the event and highlighting the victors. Contest results articles might also include photographs of radio stations and operators in

4346-462: The evolving interests of amateur radio operators. In a specialised contest in the microwave frequency bands, where only a handful of radio amateurs have the technical skills to construct the necessary equipment, a few contacts just a few kilometers away may be enough to win. In the most popular VHF contests, a well-equipped station in a densely populated region like Central Europe can make over 1,000 contacts on two meters in twenty-four hours. In

4428-617: The growth of the sport in the 1950s, the German QRA locator system was adopted in 1959. The QRA locator system was limited to describing European coordinates, and by the mid-1970s there was growing need for a global locator system. By the time of their April 1980 meeting, in Maidenhead , England, the VHF Working Group had received twenty different proposals to replace the QRA locator grid. That devised by John Morris (G4ANB)

4510-503: The infrastructure for contest log submission, log checking, and performs other services in support of the contests. CQ Amateur Radio is also associated with a number of amateur radio awards, of which the best known is Worked All Zones . Others offered are the WPX and the "USA Counties" awards. In December 2023, Moseson had communicated to some subscribers via e-mail that publication of the magazine had been suspended. The last issue published

4592-556: The locations from which they operate contests, and the effect that location has on both radio propagation and the proximity to major populations of amateur radio operators also conspired to make comparisons of the top performers in the sport difficult. The first "face to face" World Radiosport Team Championship event was held in July, 1990 in Seattle, Washington , United States, and was an effort to overcome some of these issues by inviting

4674-440: The log data; they can keep a running score based upon the formula of the contest, track which available multipliers have been "worked" and which have not, and provide the operator with visual clues about how many contacts are being made on which bands. Some contest software even provide a means to control the station equipment via computer, retrieve data from the radio and send pre-recorded Morse code, voice or digital messages. After

4756-400: The log, which means that the need for speed in operation must be balanced against the requirement for accuracy. It is not uncommon for a station to lead in points at the end of the contest, but slip behind a more accurate competitor after the cross-checking process has assessed penalties. Some contest sponsors provide custom log checking reports to participating stations that offer details about

4838-446: The number and variety of radio contests has increased, and many amateur radio operators today pursue the sport as their primary amateur radio activity. There is no international authority or governance organization for this sport. Each competition is sponsored separately and has its own set of rules. Contest rules do not necessarily require entrants to comply with voluntary international band plans. Participants must, however, adhere to

4920-470: The number of contacts made and multipliers earned. Some stations and operators specialize in certain contests, and either rarely operate in others, or compete in them with less seriousness. As with other sports, contest rules evolve over time, and rule changes are one of the primary sources of controversy in the sport. The origin of contesting can be traced to the Trans-Atlantic Tests of

5002-518: The planet, and attracts tens of thousands of participating stations each year. In large contests the number of people taking part is a significant percentage of radio amateurs active on the HF bands , although they in themselves are a small percentage of the total amateurs in the world. There are regional contests that invite all stations around the world to participate, but restrict which stations each competitor may contact. For example, Japanese stations in

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5084-535: The range of characters (or "encoding base number") used in each pair does vary. To avoid negative numbers in the input data, the system specifies that latitude is measured from the South Pole to the North Pole , and longitude measured eastward from the antimeridian of Greenwich , giving the prime meridian a false easting of 180° and the equator a false northing of 90°. To simplify manual encoding,

5166-493: The recognition of their peers, winners in radio contests do, however, often receive paper certificates, wooden plaques, trophies, engraved gavels, or medals in recognition of their achievements. Some contests provide trophies of nominal economic value that highlight their local agricultural or cultural heritage, such as smoked salmon (for the Washington State Salmon Run contest) or a bottle of wine (for

5248-567: The same Maidenhead subsquare are always less than 10.4 km (6.5 mi) apart, which means a Maidenhead locator can give adequate precision from only six easily transmissible characters. For even more precise location mapping, two additional digits were proposed and ratified as an extended locator , making it altogether eight characters long, and dividing subsquares into even smaller ones with dimensions 15" of latitude by 30" of longitude. Such precision has uses in very short communication spans. Beyond this, no common definition exists to extend

5330-400: The same radio spectrum. Radio contests are principally sponsored by amateur radio societies, radio clubs, or radio enthusiast magazines. These organizations publish the rules for the event, collect the operational logs from all stations that operate in the event, cross-check the logs to generate a score for each station, and then publish the results in a magazine , in a society journal, or on

5412-656: The specific time period during which they may make contacts for the contest. Some contests restrict participation to stations in a particular geographic area, such as a continent or country. Contests like the European HF Championship aim to foster competition between stations located in one particular part of the world, specifically Europe. There are contests in which any amateur radio station worldwide may participate and make contact with any other stations for contest credit. The CQ World Wide DX Contest permits stations to contact other stations anywhere else on

5494-722: The sport, the National Contest Journal , began circulation in the United States in 1973. The IARU HF World Championship, a worldwide contest sponsored by the International Amateur Radio Union, was known as the IARU Radiosport Championship from its inception in 1977 until the name of the contest changed in 1986. Recognizing the vitality and maturity of the sport, CQ Amateur Radio magazine established

5576-501: The station is located, the age of the operator, or an incrementing serial number. For each contact, the radio operator must correctly receive the call sign of the other station, as well as the information in the "exchange", and record this data, along with the time of the contact and the band or frequency that was used to make the contact, in a log. A contest score is computed based on a formula defined for that contest. A typical formula assigns some number of points for each contact, and

5658-410: The summary report of the winners and the line score data in a non-searchable format to anyone through their web site. Because radio contests take place using amateur radio, competitors are forbidden by regulation from being compensated financially for their activity. This international regulatory restriction of the Amateur Radio Service precludes the development of a professional sport. In addition to

5740-404: The system further into even smaller squares. Most often the extending is done by repeating alternating subsquare and square rules (base numbers 24 and 10 respectively). However, other bases for letter encodings have also been observed, and therefore such extended extended locators might not be compatible. To summarise: (The fifth and subsequent pairs are not formally defined, but recursing to

5822-427: The third and fourth pair algorithms is a possibility, e.g.: BL11BH16OO66) On shortwave frequencies, positions are reported at square precision, and on VHF and UHF, subsquare precision is used. At high microwave frequencies extended square and extended subsquare precision is often used. Like the QRA system before it, Maidenhead locators were enthusiastically adopted by radio amateurs beyond contesting, and it

5904-615: The top contesters from around the world to operate a single contest from similar stations in one compact geographic area. Twenty-two teams of two operators each represented fifteen countries, and included some top competitors from the Soviet Union and nations of the former Eastern Bloc for whom the trip was their first to a western nation. Subsequent WRTC events have been held in 1996 ( San Francisco, California , United States), 2000 ( Bled , Slovenia ), 2002 ( Helsinki, Finland ), and 2006 ( Florianópolis , Brazil ). The closest thing to

5986-561: The use of WGS 84. The relatively new FT8 narrowband digital mode transmits Maidenhead locator square as part of standard messages, with the 4 character locator square being efficiently represented within 15 bits of the transmitted string. In 2019 the IARU clarified the latest position on use of the IARU locator at various levels of precision, including a fifth pair of characters and that all letters should be uppercase. In 1985,

6068-664: The winners. Aruba , Curaçao , the Canary Islands , the Cape Verde Islands , Madeira Island , coastal Morocco and the islands of Trinidad and Tobago have been the sites of some of the most famous radio contesting victories in the large worldwide contests. Competition between stations in large countries, such as Canada, Russia, or the United States can be greatly affected by the geographic locations of each station. Because of these variations, some stations may specialize in only those contests where they are not at

6150-513: The world. Maidenhead locators are also commonly referred to as QTH locators , grid locators or grid squares , although the "squares" are distorted on any non- equirectangular cartographic projection . Use of the terms QTH locator and QRA locator was initially discouraged, as it caused confusion with the older QRA locator system. The only abbreviation recommended to indicate a Maidenhead reference in Morse code and radio teleprinter transmission

6232-554: Was LOC , as in LOC KN28LH . John Morris G4ANB originally devised the system and it was adopted at a meeting of the IARU VHF Working Group in Maidenhead , England in 1980. Amateur radio contests on VHF and UHF are often scored based on the distance of contacts , typically 1 point per kilometre, so there is a need for amateurs to exchange their locations over the air. To facilitate this, following

6314-405: Was October 2023 in digital format on Zinio. Since then, digital subscribers were issued partial refunds for the balance of their subscriptions. CQ magazine had been seeking funding to continue operations. The magazine’s publisher, Richard A. Ross, K2MGA passed away on April 27, 2024. Ross had been the magazine’s publisher since 1979. Contesting Contesting (also known as radiosport )

6396-516: Was chosen as the base number, giving these subsquares dimensions of 2.5' of latitude by 5' of longitude. The letters used are "A" through "X". The resulting Maidenhead subsquare locator string is hence composed of two letters, two digits, and two more letters. To give an example, W1AW, the American Radio Relay League 's Hiram Percy Maxim Memorial Station in Newington, Connecticut , is found in grid locator  ​FN31pr . Two points within

6478-667: Was deemed to be the best. At the 1999 IARU Conference in Lillehammer it was decided that the latitude and longitude to be used as a reference for the determining of locators should be based on the World Geodetic System 1984 (WGS-84). A Maidenhead locator compresses latitude and longitude into a short string of characters, which is similar in concept to the World Geographic Reference System or GEOREF. This position information

6560-412: Was held in July 1933, and publicized through the ARRL's membership journal QST . Field day events were promoted as an opportunity for radio amateurs to operate from portable locations, in environments that simulate what might be encountered during emergency or disaster relief situations. Field day events have traditionally carried the same general operating and scoring structures as other contests, but

6642-677: Was sponsored annually by the ARRL from 1927 through 1935. In 1936, the contest name changed to the ARRL International DX Contest, the name under which it is known today. To complement the burst of activity and interest being generated in DX communications by the popularity of the International Relay Parties, the ARRL adopted a competitive operating format for events designed for non-international contacts. The first ARRL All-Sections Sweepstakes Contest

6724-534: Was started in 1930. The Sweepstakes required a more complicated exchange of information for each two-way contact that was adapted from the message header structure used by the National Traffic System . The competition was immediately popular, both with those operators active in the NTS who participated as an opportunity to gauge the merits of their station and operating skills, and among those for whom

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