186 relations: Africa, Alberta, Amateur radio emergency communications, Amateur radio frequency allocations, Amateur radio homebrew, Amateur radio international operation, Amateur radio licensing in the United States, Amateur radio net, Amateur radio operating award, Amateur radio operator, Amateur radio repeater, Amateur radio satellite, Amateur radio station, Amateur television, Amateur-satellite service, American Radio Relay League, Amplitude modulation, AMTOR, Asia, Astronaut, Aurora, Australia, Automatic link establishment, Automatic Packet Reporting System, AX.25, Bandplan, Bandwidth (signal processing), Bangladesh NGOs Network for Radio and Communication, Baud, Belgium, British Columbia, Broadcast call signs, Bureaucrat, Call sign, Canada, Canadian Coast Guard, Citizens band radio, City and Guilds of London Institute, Commercial broadcasting, Compatible sideband transmission, Computer, Computer network, Contesting, Continuous wave, Country, Cuba, D-STAR, Digital data, Digital mobile radio, Double-sideband suppressed-carrier transmission, ..., DX Century Club, Earth–Moon–Earth communication, EchoLink, Encryption, Engineering, Europe, Family Radio Service, Federal Communications Commission, Frequency modulation, Germany, Hamfest, Hellschreiber, High frequency, Independent sideband, India, Industry, International Amateur Radio Union, International Space Station, International Telecommunication Union, Internet, Internet protocol suite, Internet Radio Linking Project, Iran, Italy, ITU Radio Regulations, Jamboree on the Air, Japan, Labrador, Landline, Latin America, List of amateur radio magazines, List of amateur radio modes, List of amateur radio organizations, List of amateur radio software, Luxembourg, Manitoba, Maritime mobile amateur radio, McClure's, Meteor burst communications, Meteoroid, Microwave, Military Auxiliary Radio System, Modulation, Morse code, MT63, Multiple frequency-shift keying, New Brunswick, New York City, New Zealand, New Zealand Association of Radio Transmitters, Newfoundland and Labrador, Newington, Connecticut, Non-commercial, North Korea, Northwest Territories, Nova Scotia, Nunavut, Olivia MFSK, Oman, Ontario, Orthogonal frequency-division multiplexing, Packet radio, PACTOR, Peak envelope power, Pecuniary, Pejorative, Personal computer, Phase modulation, Phase-shift keying, PMR446, Power (physics), Prince Edward Island, Prosigns for Morse code, PSK31, PSK63, Q code, QRP operation, QRZ.com, QST, Quebec, Radio Amateurs of Canada, Radio Emergency Associated Communication Teams, Radio frequency, Radio propagation, Radio Society of Great Britain, Radio spectrum, Radiofax, Radiosport, Radioteletype, Sable Island, Samuel Morse, Saskatchewan, Science, Shortwave radio, Signal-to-noise ratio, Single-sideband modulation, Slow-scan television, Social services, South African Radio League, Spread spectrum, Spurious emission, St. Paul Island (Nova Scotia), Summits on the Air, Switzerland, Syria, Telegraphy, Transceiver, Trinidad and Tobago, Two-way radio, Types of radio emissions, Ultra high frequency, United Kingdom, United States, Vacuum tube, Vehicle registration plate, Very high frequency, Vintage amateur radio, Virtual private network, Voice over IP, Walkie-talkie, Washington, D.C., Watt, Wireless, Wireless Institute of Australia, Wireless telegraphy, Worked All Continents, Worked All States, Worked All Zones, World Administrative Radio Conference, WSJT (amateur radio software), WSPR (amateur radio software), Yemen, Yukon, 23-centimeter band, 33-centimeter band, 70-centimeter band. Expand index (136 more) » « Shrink index
Africa is the world's second largest and second most-populous continent (behind Asia in both categories).
Alberta is a western province of Canada.
In times of crisis and natural disasters, amateur radio is often used as a means of emergency communication when wireline, cell phones and other conventional means of communications fail.
Amateur radio frequency allocation is done by national telecommunications authorities.
Homebrew is an amateur radio slang term for home-built, noncommercial radio equipment.
Amateur radio international reciprocal operating agreements permit Amateur Radio Operators (Hams) from one country to operate a station whilst traveling in another without the need to obtain additional licenses or permits.
In the United States, amateur radio licensing is governed by the Federal Communications Commission (FCC) under strict federal regulations.
An amateur radio net, or simply ham net, is an "on-the-air" gathering of amateur radio operators.
An amateur radio operating award is earned by an amateur radio operator for establishing two-way communication (or "working") with other amateur radio stations.
An amateur radio operator is someone who uses equipment at an amateur radio station to engage in two-way personal communications with other amateur operators on radio frequencies assigned to the amateur radio service.
An amateur radio repeater is an electronic device that receives a weak or low-level amateur radio signal and retransmits it at a higher level or higher power, so that the signal can cover longer distances without degradation.
An amateur radio satellite is an artificial satellite built and used by amateur radio operators for use in the Amateur-satellite service.
An amateur radio station is a radio station designed to provide radiocommunications in the amateur radio service for an amateur radio operator.
Amateur television (ATV) is the transmission of broadcast quality video and audio over the wide range of frequencies of radio waves allocated for radio amateur (Ham) use.
Amateur-satellite service (also: amateur-satellite radiocommunication service) is – according to Article 1.57 of the International Telecommunication Union´s (ITU) Radio Regulations (RR) – defined as «A radiocommunication service using space stations on earth satellites for the same purposes as those of the amateur service.»;See also.
The American Radio Relay League (ARRL) is the largest membership association of amateur radio enthusiasts in the USA.
Amplitude modulation (AM) is a modulation technique used in electronic communication, most commonly for transmitting information via a radio carrier wave.
AMTOR (Amateur Teleprinting Over Radio) is a type of telecommunications system that consists of two or more electromechanical teleprinters in different locations that send and receive messages to one another.
Asia is Earth's largest and most populous continent, located primarily in the Eastern and Northern Hemispheres.
An astronaut or cosmonaut is a person trained by a human spaceflight program to command, pilot, or serve as a crew member of a spacecraft.
An aurora (plural: auroras or aurorae), sometimes referred to as polar lights, northern lights (aurora borealis) or southern lights (aurora australis), is a natural light display in the Earth's sky, predominantly seen in the high-latitude regions (around the Arctic and Antarctic).
Australia, officially the Commonwealth of Australia, is a sovereign country comprising the mainland of the Australian continent, the island of Tasmania and numerous smaller islands.
Automatic Link Establishment, commonly known as ALE, is the worldwide de facto standard for digitally initiating and sustaining HF radio communications.
Automatic Packet Reporting System (APRS) is an amateur radio-based system for real time digital communications of information of immediate value in the local area.
AX.25 (Amateur X.25) is a data link layer protocol derived from the X.25 protocol suite and designed for use by amateur radio operators.
A bandplan or band plan is a plan for using a particular band of radio frequencies, that are a portion of the electromagnetic spectrum.
Bandwidth is the difference between the upper and lower frequencies in a continuous band of frequencies.
Bangladesh NGOs Network for Radio and Communication (BNNRC) is a national networking body in Bangladesh.
In telecommunication and electronics, baud (symbol: Bd) is a common measure of the speed of communication over a data channel.
Belgium, officially the Kingdom of Belgium, is a country in Western Europe bordered by France, the Netherlands, Germany and Luxembourg.
British Columbia (BC; Colombie-Britannique) is the westernmost province of Canada, located between the Pacific Ocean and the Rocky Mountains.
Broadcast call signs are call signs assigned as unique identifiers to radio stations and television stations.
A bureaucrat is a member of a bureaucracy and can compose the administration of any organization of any size, although the term usually connotes someone within an institution of government.
In broadcasting and radio communications, a call sign (also known as a call name or call letters—and historically as a call signal—or abbreviated as a call) is a unique designation for a transmitter station.
Canada is a country located in the northern part of North America.
The Canadian Coast Guard (CCG; Garde côtière canadienne – GCC) is the coast guard of Canada.
Citizens band radio (also known as CB radio) is, in many countries, a system of short-distance radio communications between individuals typically on a selection of 40 channels within the 27 MHz (11 m) band.
The City and Guilds of London Institute is an educational organisation in the United Kingdom.
Commercial broadcasting (also called private broadcasting) is the broadcasting of television programs and radio programming by privately owned corporate media, as opposed to state sponsorship.
A Compatible sideband transmission, also known as amplitude modulation equivalent (AME) or Single sideband-reduced carrier (SSB-RC), is a type of single sideband RF modulation in which the carrier is deliberately reinserted at a lower level after its normal suppression to permit reception by conventional AM receivers.
A computer is a device that can be instructed to carry out sequences of arithmetic or logical operations automatically via computer programming.
A computer network, or data network, is a digital telecommunications network which allows nodes to share resources.
Contesting (also known as radiosport) is a competitive activity pursued by amateur radio operators.
A continuous wave or continuous waveform (CW) is an electromagnetic wave of constant amplitude and frequency, almost always a sine wave, that for mathematical analysis is considered to be of infinite duration.
A country is a region that is identified as a distinct national entity in political geography.
Cuba, officially the Republic of Cuba, is a country comprising the island of Cuba as well as Isla de la Juventud and several minor archipelagos.
D-STAR (Digital Smart Technologies for Amateur Radio) is a digital voice and data protocol specification for amateur radio.
Digital data, in information theory and information systems, is the discrete, discontinuous representation of information or works.
Digital mobile radio (DMR) is an open digital mobile radio standard defined in the European Telecommunications Standards Institute (ETSI) Standard TS 102 361 parts 1–4 and used in commercial products around the world.
Double-sideband suppressed-carrier transmission (DSB-SC) is transmission in which frequencies produced by amplitude modulation (AM) are symmetrically spaced above and below the carrier frequency and the carrier level is reduced to the lowest practical level, ideally being completely suppressed.
The DX Century Club, or DXCC, is an amateur radio operating award earned by making contacts with licensed amateur operators in at least 100 "countries" (i.e. geographic locations listed in the rules for the award) around the world, many of which are physically distant from the claimant (i.e.DX).
Earth–Moon–Earth communication (EME), also known as moon bounce, is a radio communications technique that relies on the propagation of radio waves from an Earth-based transmitter directed via reflection from the surface of the Moon back to an Earth-based receiver.
EchoLink is a computer-based Amateur Radio system distributed free of charge that allows radio amateurs to communicate with other amateur radio operators using Voice over IP (VoIP) technology on the Internet for at least part of the path between them.
In cryptography, encryption is the process of encoding a message or information in such a way that only authorized parties can access it and those who are not authorized cannot.
Engineering is the creative application of science, mathematical methods, and empirical evidence to the innovation, design, construction, operation and maintenance of structures, machines, materials, devices, systems, processes, and organizations.
Europe is a continent located entirely in the Northern Hemisphere and mostly in the Eastern Hemisphere.
The Family Radio Service (FRS) is an improved walkie-talkie radio system authorized in the United States since 1996.
The Federal Communications Commission (FCC) is an independent agency of the United States government created by statute (and) to regulate interstate communications by radio, television, wire, satellite, and cable.
In telecommunications and signal processing, frequency modulation (FM) is the encoding of information in a carrier wave by varying the instantaneous frequency of the wave.
Germany (Deutschland), officially the Federal Republic of Germany (Bundesrepublik Deutschland), is a sovereign state in central-western Europe.
A Hamfest is a convention of amateur radio enthusiasts, often combining a trade show, flea market, and various other activities of interest to amateur radio operators (hams).
The Hellschreiber, Feldhellschreiber or Typenbildfeldfernschreiber (also Hell-Schreiber named after its inventor Rudolf Hell) is a facsimile-based teleprinter invented by Rudolf Hell.
High frequency (HF) is the ITU designation for the range of radio frequency electromagnetic waves (radio waves) between 3 and 30 megahertz (MHz).
Independent sideband (ISB) is an AM single sideband mode which is used with some AM radio transmissions.
India (IAST), also called the Republic of India (IAST), is a country in South Asia.
Industry is the production of goods or related services within an economy.
The International Amateur Radio Union (IARU) is an international confederation of national amateur radio organisations that allows a forum for common matters of concern and collectively represents matters to the International Telecommunication Union (ITU).
The International Space Station (ISS) is a space station, or a habitable artificial satellite, in low Earth orbit.
The International Telecommunication Union (ITU; Union Internationale des Télécommunications (UIT)), originally the International Telegraph Union (Union Télégraphique Internationale), is a specialized agency of the United Nations (UN) that is responsible for issues that concern information and communication technologies.
The Internet is the global system of interconnected computer networks that use the Internet protocol suite (TCP/IP) to link devices worldwide.
The Internet protocol suite is the conceptual model and set of communications protocols used on the Internet and similar computer networks.
The Internet Radio Linking Project, also called IRLP, is a closed-source project that links amateur radio stations around the world by using Voice over IP (VoIP).
Iran (ایران), also known as Persia, officially the Islamic Republic of Iran (جمهوری اسلامی ایران), is a sovereign state in Western Asia. With over 81 million inhabitants, Iran is the world's 18th-most-populous country. Comprising a land area of, it is the second-largest country in the Middle East and the 17th-largest in the world. Iran is bordered to the northwest by Armenia and the Republic of Azerbaijan, to the north by the Caspian Sea, to the northeast by Turkmenistan, to the east by Afghanistan and Pakistan, to the south by the Persian Gulf and the Gulf of Oman, and to the west by Turkey and Iraq. The country's central location in Eurasia and Western Asia, and its proximity to the Strait of Hormuz, give it geostrategic importance. Tehran is the country's capital and largest city, as well as its leading economic and cultural center. Iran is home to one of the world's oldest civilizations, beginning with the formation of the Elamite kingdoms in the fourth millennium BCE. It was first unified by the Iranian Medes in the seventh century BCE, reaching its greatest territorial size in the sixth century BCE, when Cyrus the Great founded the Achaemenid Empire, which stretched from Eastern Europe to the Indus Valley, becoming one of the largest empires in history. The Iranian realm fell to Alexander the Great in the fourth century BCE and was divided into several Hellenistic states. An Iranian rebellion culminated in the establishment of the Parthian Empire, which was succeeded in the third century CE by the Sasanian Empire, a leading world power for the next four centuries. Arab Muslims conquered the empire in the seventh century CE, displacing the indigenous faiths of Zoroastrianism and Manichaeism with Islam. Iran made major contributions to the Islamic Golden Age that followed, producing many influential figures in art and science. After two centuries, a period of various native Muslim dynasties began, which were later conquered by the Turks and the Mongols. The rise of the Safavids in the 15th century led to the reestablishment of a unified Iranian state and national identity, with the country's conversion to Shia Islam marking a turning point in Iranian and Muslim history. Under Nader Shah, Iran was one of the most powerful states in the 18th century, though by the 19th century, a series of conflicts with the Russian Empire led to significant territorial losses. Popular unrest led to the establishment of a constitutional monarchy and the country's first legislature. A 1953 coup instigated by the United Kingdom and the United States resulted in greater autocracy and growing anti-Western resentment. Subsequent unrest against foreign influence and political repression led to the 1979 Revolution and the establishment of an Islamic republic, a political system that includes elements of a parliamentary democracy vetted and supervised by a theocracy governed by an autocratic "Supreme Leader". During the 1980s, the country was engaged in a war with Iraq, which lasted for almost nine years and resulted in a high number of casualties and economic losses for both sides. According to international reports, Iran's human rights record is exceptionally poor. The regime in Iran is undemocratic, and has frequently persecuted and arrested critics of the government and its Supreme Leader. Women's rights in Iran are described as seriously inadequate, and children's rights have been severely violated, with more child offenders being executed in Iran than in any other country in the world. Since the 2000s, Iran's controversial nuclear program has raised concerns, which is part of the basis of the international sanctions against the country. The Joint Comprehensive Plan of Action, an agreement reached between Iran and the P5+1, was created on 14 July 2015, aimed to loosen the nuclear sanctions in exchange for Iran's restriction in producing enriched uranium. Iran is a founding member of the UN, ECO, NAM, OIC, and OPEC. It is a major regional and middle power, and its large reserves of fossil fuels – which include the world's largest natural gas supply and the fourth-largest proven oil reserves – exert considerable influence in international energy security and the world economy. The country's rich cultural legacy is reflected in part by its 22 UNESCO World Heritage Sites, the third-largest number in Asia and eleventh-largest in the world. Iran is a multicultural country comprising numerous ethnic and linguistic groups, the largest being Persians (61%), Azeris (16%), Kurds (10%), and Lurs (6%).
Italy (Italia), officially the Italian Republic (Repubblica Italiana), is a sovereign state in Europe.
The ITU Radio Regulations (short: RR) regulates on law of nations scale radiocommunication services and the utilisation of radio frequencies.
Jamboree on the Air, known by its acronym JOTA, is an international Scouting and Guiding activity held annually; it is on the third full weekend in October.
Japan (日本; Nippon or Nihon; formally 日本国 or Nihon-koku, lit. "State of Japan") is a sovereign island country in East Asia.
Labrador is the continental-mainland part of the Canadian province of Newfoundland and Labrador.
A landline telephone (also known as land line, land-line, main line, home phone, landline, fixed-line, and wireline) is a phone that uses a metal wire or optical fiber telephone line for transmission as distinguished from a mobile cellular line, which uses radio waves for transmission.
Latin America is a group of countries and dependencies in the Western Hemisphere where Spanish, French and Portuguese are spoken; it is broader than the terms Ibero-America or Hispanic America.
This is a list of magazines that focus on topics related to amateur radio.
The following is a list of the modes of radio communication used in the amateur radio hobby.
This is a list of amateur radio organizations.
This is a list of software for amateur radio.
Luxembourg (Lëtzebuerg; Luxembourg, Luxemburg), officially the Grand Duchy of Luxembourg, is a landlocked country in western Europe.
Manitoba is a province at the longitudinal centre of Canada.
Most countries' amateur radio licences allow licensed operators to install and use radio transmission equipment while at sea.
McClure's or McClure's Magazine (1893–1929) was an American illustrated monthly periodical popular at the turn of the 20th century.
Meteor burst communications (MBC), also referred to as meteor scatter communications, is a radio propagation mode that exploits the ionized trails of meteors during atmospheric entry to establish brief communications paths between radio stations up to apart.
A meteoroid is a small rocky or metallic body in outer space.
Microwaves are a form of electromagnetic radiation with wavelengths ranging from one meter to one millimeter; with frequencies between and.
The Military Auxiliary Radio System (MARS) is a United States Department of Defense sponsored program, established as a separately managed and operated program by the United States Army, and the United States Air Force.
In electronics and telecommunications, modulation is the process of varying one or more properties of a periodic waveform, called the carrier signal, with a modulating signal that typically contains information to be transmitted.
Morse code is a method of transmitting text information as a series of on-off tones, lights, or clicks that can be directly understood by a skilled listener or observer without special equipment.
MT63 is a digital radio modulation mode for transmission in high-noise situations developed by Pawel Jalocha SP9VRC.
Multiple frequency-shift keying (MFSK) is a variation of frequency-shift keying (FSK) that uses more than two frequencies.
New Brunswick (Nouveau-Brunswick; Canadian French pronunciation) is one of three Maritime provinces on the east coast of Canada.
The City of New York, often called New York City (NYC) or simply New York, is the most populous city in the United States.
New Zealand (Aotearoa) is a sovereign island country in the southwestern Pacific Ocean.
The New Zealand Association of Radio Transmitters (NZART) is a non-profit organisation of amateur radio enthusiasts in New Zealand.
Newfoundland and Labrador (Terre-Neuve-et-Labrador; Akamassiss; Newfoundland Irish: Talamh an Éisc agus Labradar) is the most easterly province of Canada.
Newington is a town in Hartford County, Connecticut, United States.
Non-commercial (also spelled noncommercial) refers to an activity or entity that does not, in some sense, involve commerce, at least relative to similar activities that do have a commercial objective or emphasis.
North Korea (Chosŏn'gŭl:조선; Hanja:朝鮮; Chosŏn), officially the Democratic People's Republic of Korea (abbreviated as DPRK, PRK, DPR Korea, or Korea DPR), is a country in East Asia constituting the northern part of the Korean Peninsula.
The Northwest Territories (NT or NWT; French: les Territoires du Nord-Ouest, TNO; Athabaskan languages: Denendeh; Inuinnaqtun: Nunatsiaq; Inuktitut: ᓄᓇᑦᓯᐊᖅ) is a federal territory of Canada.
Nova Scotia (Latin for "New Scotland"; Nouvelle-Écosse; Scottish Gaelic: Alba Nuadh) is one of Canada's three maritime provinces, and one of the four provinces that form Atlantic Canada.
Nunavut (Inuktitut syllabics ᓄᓇᕗᑦ) is the newest, largest, and northernmost territory of Canada.
Olivia MFSK is an amateur radioteletype protocol, using multiple frequency-shift keying (MFSK) and designed to work in difficult (low signal-to-noise ratio plus multipath propagation) conditions on shortwave bands.
Oman (عمان), officially the Sultanate of Oman (سلطنة عُمان), is an Arab country on the southeastern coast of the Arabian Peninsula in Western Asia.
Ontario is one of the 13 provinces and territories of Canada and is located in east-central Canada.
In telecommunications, orthogonal frequency-division multiplexing (OFDM) is a method of encoding digital data on multiple carrier frequencies.
Packet radio is a form of packet switching technology used to transmit digital data via wireless communications.
PACTOR is a radio modulation mode used by amateur radio operators, marine radio stations, and radio stations in isolated areas to send and receive digital information via radio.
Peak envelope power (PEP) is the highest envelope power supplied to the antenna transmission line by a transmitter during any full undistorted RF cycle or series of complete radio frequency cycles.
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A pejorative (also called a derogatory term, a slur, a term of abuse, or a term of disparagement) is a word or grammatical form expressing a negative connotation or a low opinion of someone or something, showing a lack of respect for someone or something.
A personal computer (PC) is a multi-purpose computer whose size, capabilities, and price make it feasible for individual use.
Phase modulation (PM) is a modulation pattern for conditioning communication signals for transmission.
Phase-shift keying (PSK) is a digital modulation process which conveys data by changing (modulating) the phase of a constant frequency reference signal (the carrier wave).
PMR446 (personal mobile radio, 446 MHz) is a part of the UHF radio frequency range that is open without licensing for business and personal use in most countries of the European Union.
In physics, power is the rate of doing work, the amount of energy transferred per unit time.
Prince Edward Island (PEI or P.E.I.; Île-du-Prince-Édouard) is a province of Canada consisting of the island of the same name, and several much smaller islands.
Procedure signs or prosigns are shorthand signals used in radio telegraphy procedures, for the purpose of simplifying and standardizing communications related to radio operating issues among two or more radio operators.
PSK31 or "Phase Shift Keying, 31 Baud", also BPSK31 and QPSK31, is a popular computer-sound card-generated radioteletype mode, used primarily by amateur radio operators to conduct real-time keyboard-to-keyboard chat, most often using frequencies in the high frequency amateur radio bands (near-shortwave).
PSK63 (meaning Phase Shift Keying at a rate of 63 baud) is a digital radio modulation mode used primarily in the amateur radio field to conduct real-time keyboard-to-keyboard informal text chat between amateur radio operators.
The Q code is a standardized collection of three-letter codes all of which start with the letter "Q".
In amateur radio, QRP operation refers to transmitting at reduced power while attempting to maximize one's effective range.
QRZ.com is an amateur radio callsign website, which houses almost every callsign in the world.
QST is a magazine for amateur radio enthusiasts, published by the American Radio Relay League (ARRL).
Quebec (Québec)According to the Canadian government, Québec (with the acute accent) is the official name in French and Quebec (without the accent) is the province's official name in English; the name is.
Radio Amateurs of Canada (RAC), known in French as Radio Amateurs du Canada, is the national association for Amateur Radio in Canada.
REACT (Radio Emergency Associated Communication Teams) began as a CB radio Emergency Channel 9 monitoring organization across the United States and Canada in 1962.
Radio frequency (RF) refers to oscillatory change in voltage or current in a circuit, waveguide or transmission line in the range extending from around twenty thousand times per second to around three hundred billion times per second, roughly between the upper limit of audio and the lower limit of infrared.
Radio propagation is the behavior of radio waves as they travel, or are propagated, from one point to another, or into various parts of the atmosphere.
The Radio Society of Great Britain (RSGB), first founded in 1913 as the London Wireless Club, is the United Kingdom's recognised national society for amateur radio operators.
The radio spectrum is the part of the electromagnetic spectrum with frequencies from 3 Hz to 3 000 GHz (3 THz).
Radiofax, also known as weatherfax (portmanteau word from the words "weather facsimile") and HF fax (due to its common use on shortwave radio), is an analogue mode for transmitting monochrome images.
Radiosport (or radio sport) is formal competition between amateur radio operators in any of three amateur radio activities.
Radioteletype (RTTY) is a telecommunications system consisting originally of two or more electromechanical teleprinters in different locations connected by radio rather than a wired link.
Sable Island (île de Sable) is a small island situated southeast of Halifax, Nova Scotia, and about southeast of the closest point of mainland Nova Scotia in the Atlantic Ocean.
Samuel Finley Breese Morse (April 27, 1791 – April 2, 1872) was an American painter and inventor. After having established his reputation as a portrait painter, in his middle age Morse contributed to the invention of a single-wire telegraph system based on European telegraphs. He was a co-developer of the Morse code and helped to develop the commercial use of telegraphy.
Saskatchewan is a prairie and boreal province in western Canada, the only province without natural borders.
R. P. Feynman, The Feynman Lectures on Physics, Vol.1, Chaps.1,2,&3.
Shortwave radio is radio transmission using shortwave radio frequencies.
Signal-to-noise ratio (abbreviated SNR or S/N) is a measure used in science and engineering that compares the level of a desired signal to the level of background noise.
In radio communications, single-sideband modulation (SSB) or single-sideband suppressed-carrier modulation (SSB-SC) is a type of modulation, used to transmit information, such as an audio signal, by radio waves.
Slow Scan television (SSTV) is a picture transmission method used mainly by amateur radio operators, to transmit and receive static pictures via radio in monochrome or color.
Social services are a range of public services provided by the government, private, and non-profit organizations.
The South African Radio League (SARL), formerly known as the South African Radio Relay League (SARRL), is a non-profit organisation representing the interests of amateur radio enthusiasts in South Africa.
In telecommunication and radio communication, spread-spectrum techniques are methods by which a signal (e.g., an electrical, electromagnetic, or acoustic signal) generated with a particular bandwidth is deliberately spread in the frequency domain, resulting in a signal with a wider bandwidth.
A spurious emission is any radio frequency not deliberately created or transmitted, especially in a device which normally does create other frequencies.
Summits On The Air (SOTA) is an amateur radio operating award program launched in Great Britain in 2002, which is now known worldwide.
Switzerland, officially the Swiss Confederation, is a sovereign state in Europe.
Syria (سوريا), officially known as the Syrian Arab Republic (الجمهورية العربية السورية), is a country in Western Asia, bordering Lebanon and the Mediterranean Sea to the west, Turkey to the north, Iraq to the east, Jordan to the south, and Israel to the southwest.
Telegraphy (from Greek: τῆλε têle, "at a distance" and γράφειν gráphein, "to write") is the long-distance transmission of textual or symbolic (as opposed to verbal or audio) messages without the physical exchange of an object bearing the message.
A transceiver is a device comprising both a transmitter and a receiver that are combined and share common circuitry or a single housing.
Trinidad and Tobago, officially the Republic of Trinidad and Tobago, is a twin island sovereign state that is the southernmost nation of the West Indies in the Caribbean.
A two-way radio is a radio that can do both transmit and receive a signal (a transceiver), unlike a broadcast receiver which only receives content.
The International Telecommunication Union uses an internationally agreed system for classifying radio frequency signals.
Ultra high frequency (UHF) is the ITU designation for radio frequencies in the range between 300 megahertz (MHz) and 3 gigahertz (GHz), also known as the decimetre band as the wavelengths range from one meter to one decimeter.
The United Kingdom of Great Britain and Northern Ireland, commonly known as the United Kingdom (UK) or Britain,Usage is mixed with some organisations, including the and preferring to use Britain as shorthand for Great Britain is a sovereign country in western Europe.
The United States of America (USA), commonly known as the United States (U.S.) or America, is a federal republic composed of 50 states, a federal district, five major self-governing territories, and various possessions.
In electronics, a vacuum tube, an electron tube, or just a tube (North America), or valve (Britain and some other regions) is a device that controls electric current between electrodes in an evacuated container.
A vehicle registration plate, also known as a number plate (British English) or a license plate (American English), is a metal or plastic plate attached to a motor vehicle or trailer for official identification purposes.
Very high frequency (VHF) is the ITU designation for the range of radio frequency electromagnetic waves (radio waves) from 30 to 300 megahertz (MHz), with corresponding wavelengths of ten to one meter.
Vintage amateur radio is a subset of amateur radio activity and is considered a form of nostalgia or hobby much like antique car collecting, where enthusiasts collect, restore, preserve, build, and operate amateur radio equipment from bygone years, most notably those using vacuum tube technology.
A virtual private network (VPN) extends a private network across a public network, and enables users to send and receive data across shared or public networks as if their computing devices were directly connected to the private network.
Voice over Internet Protocol (also voice over IP, VoIP or IP telephony) is a methodology and group of technologies for the delivery of voice communications and multimedia sessions over Internet Protocol (IP) networks, such as the Internet.
A walkie-talkie (more formally known as a handheld transceiver, or HT) is a hand-held, portable, two-way radio transceiver.
Washington, D.C., formally the District of Columbia and commonly referred to as Washington or D.C., is the capital of the United States of America.
The watt (symbol: W) is a unit of power.
Wireless communication, or sometimes simply wireless, is the transfer of information or power between two or more points that are not connected by an electrical conductor.
The Wireless Institute of Australia (WIA) was formed in 1910, and is the first and oldest national amateur radio society in the world.
Wireless telegraphy is the transmission of telegraphy signals from one point to another by means of an electromagnetic, electrostatic or magnetic field, or by electrical current through the earth or water.
Worked All Continents, or WAC, is an amateur radio award given to those amateur radio operators who successfully complete two-way amateur radio communications with other amateur radio stations, one of which must be located in each of the six continental areas of the world.
Worked All States, or WAS, is an amateur radio operating award given to those amateur radio operators who successfully complete two-way amateur radio communications with other amateur radio stations located in each of the 50 United States of America (contact with the District of Columbia may be used for Maryland).
Worked All Zones, or WAZ, is an amateur radio operating award given to those amateur radio operators who successfully complete two-way amateur radio communications with other amateur radio stations located in each of the 40 geographic zones of the world, as defined by the award sponsor, CQ Amateur Radio.
The World Administrative Radio Conference (WARC) was a technical conference of the International Telecommunication Union (ITU) where delegates from member nations of the ITU met to revise or amend the entire international Radio Regulations pertaining to all telecommunication services throughout the world.
WSJT is a computer program used for weak-signal radio communication between amateur radio operators.
WSPR (pronounced "whisper") stands for "Weak Signal Propagation Reporter".
Yemen (al-Yaman), officially known as the Republic of Yemen (al-Jumhūriyyah al-Yamaniyyah), is an Arab sovereign state in Western Asia at the southern end of the Arabian Peninsula.
Yukon (also commonly called the Yukon) is the smallest and westernmost of Canada's three federal territories (the other two are the Northwest Territories and Nunavut).
The 23 centimeter, 1200 MHz or 1.2 GHz band is a portion of the UHF (microwave) radio spectrum internationally allocated to amateur radio and amateur satellite use on a secondary basis.
The 33-centimeter or 900 MHz band is a portion of the UHF radio spectrum internationally allocated to amateur radio on a secondary basis.
The 70-centimeter or 440 MHz band is a portion of the UHF radio spectrum internationally allocated to amateur radio and amateur satellite use.
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