Although radio and television programs do travel outside national borders, in many cases reception by foreigners is accidental. However, for purposes of propaganda, transmitting religious beliefs, keeping in touch with colonies or expatriates, education, improving trade, increasing national prestige, or promoting tourism and goodwill, broadcasting services have operated external services since the 1920s.
Broadcasters in one country have several reasons to reach out to an audience in other countries. The examples given below are not meant to be exhaustive, but are illustrative.
One clear reason is for ideological, or propaganda reasons. Many government-owned stations portray their nation in a positive, non-threatening way. This could be to encourage business investment and/or tourism to the nation. Another reason is to combat a negative image produced by other nations or internal dissidents, or insurgents. Radio RSA, the broadcasting arm of the apartheid South African government, is an example of this. A third reason is to promote the ideology of the broadcaster. For example, a program on Radio Moscow from the 1960s to the 1980s was What is Communism?
Other reasons include broadcasting news which might be censored, or at least of little interest, in a nation. The BBC World Service and the Voice of America have emphasized news broadcasts. In addition to these services, during the Soviet domination of Eastern Europe, Radio Free Europe served as a surrogate domestic service for nations "behind the Iron Curtain."
In the case of emergencies, a nation may broadcast special programs overseas to inform listeners what is occurring. During Iraqi missile strikes on Israel during the 1991 Gulf War, Kol Israel relayed its domestic service on its shortwave service.
Besides ideological reasons, many stations are run by religious broadcasters and are used to provide religious education, religious music, or worship service programs. For example, Vatican Radio, established in 1927, broadcasts such programs. Another station, such as HCJB International or Trans World Radio will carry brokered programming from evangelists. In the case of the Broadcasting Service of the Kingdom of Saudi Arabia, both governmental and religious programming is provided.
Stations also broadcast to international audiences for cultural reasons. Often a station has an official mandate to keep expatriates in touch with the home country. Many broadcasters often relay their national domestic service on shortwave for that reason. Other reasons include teaching a foreign language, such as Radio Exterior de España's Spanish class, Un idioma sin fronteras, or the Voice of America's broadcasts in Special English. In the case of major broadcasters such as the BBC World Service or Radio Australia, there is also an educational outreach.
Following experiments in the shortwave frequencies in 1925 from Eindhoven, in the Netherlands, radio station PCJ began broadcasting to the Indonesia on March 11, 1927.
Other notable early international broadcasters included Vatican Radio (February 12, 1931), Radio Moscow, the official service of the Soviet Union which began broadcasting on long-wave in 1923 (this has since been renamed the Voice of Russia, following the collapse of the Soviet Union).
Shortwave broadcasting from Nauen to the USA, Central and South America, and the Far East began in 1926. A second station, Zeesen, was added later. In January 1932, the German Reichpost assumed control of the Nauen station and added to its shortwave and longwave capacity.
Shortwave programming was a low priority in the Weimar Republic. Once Adolf Hitler assumed power in 1933, shortwave, under the Rundfunk Ausland (Foreign Radio Section), was regarded as a vital element of Nazi propaganda. German shortwave hours were increased from two hours a day to 18 per day, and eventually twelve languages were broadcast on a 24-hour basis, including English. A 100 kilowatt transmitter and antenna complex was built at Zeesen, near Berlin. Specialty target programming to the United States began in 1933, to South Africa, South America, and East Asia in 1934, and South Asia and Central America in 1938.
In the 1930s, international broadcasting was a key means of promoting Nazi Germany foreign policy. German propaganda was organized under Joseph Goebbels, and played a key role in the German occupation of Austria and the Munich Crisis of 1938.
Mediumwave transmitters on the periphery of the Third Reich provided specialty programs to listeners in neighboring countries. Nevertheless, the Germans always had a problem staffing their foreign services with announcers who were both technically competent and loyal to Nazi ideas.
In 1936, the International Radio Union recognized Vatican Radio as a "special case" and authorized its broadcasting without any geographical limits. On December 25, 1937, a Telefunken 25-kW transmitter and two directional antennas were added. Vatican Radio broadcast over 10 frequencies..
During the Spanish Civil War, the Nationalist forces received a powerful Telefunken transmitter as a gift of Nazi Germany to aid their propaganda efforts, and until 1943 Radio Nacional de España collaborated with the Axis powers to retransmit in Spanish news from the official radio stations of Germany and Italy.
During the Second World War, Russian, German, British, and Italian international broadcasting services expanded. In 1942, the United States initiated its international broadcasting service, the Voice of America. In the Pacific theater, General Douglas MacArthur used shortwave radio to keep in touch with the citizens of the Japanese-occupied Philippine Islands.
Several announcers who became well-known in their countries included British Union of Fascists member William Joyce, who was one of the two "Lord Haw-Haw"s; Frenchmen Paul Ferdonnet and Andre Olbrecht, called "the traitors of [Radio] Stuttgart"; and Americans Frederick William Kaltenbach, "Lord Hee-Haw", and Mildred Gillars, one of the two announcers called "Axis Sally". Listeners to German programs often tuned in for curiosity's sake--at one time, German radio had half a million listeners in the U.S.--but most of them soon lost interest. Japan had "Tokyo Rose," who broadcast Japanese propaganda in English, along with American music to help insure listeners.
For details of German propaganda themes, see propaganda.
During World War II, Vatican Radio's news broadcasts were banned in Germany. During the war, the radio service operated in four languages..
The British launched Radio SEAC from Colombo, Ceylon (Sri Lanka) during World War II. The station broadcast radio programs to the allied armed forces across the region from their headquarters in Ceylon.
Following the war and German partition, each Germany developed its own international broadcasting station: Deutsche Welle, using studios in Cologne, West Germany, and Radio Berlin International (RBI) in East Germany. RBI's broadcasts ceased shortly before the reunification of Germany on October 3, 1990, and Deutsche Welle took over its transmitters and frequencies.
West Germany resumed regular shortwave broadcasts using Deutsche Welle on May 3, 1953. Its Julich transmitter site began operation in 1956, with eleven 100-kW Telefunken transmitters. The Wectachtal site was authorized in 1962 and began with four 500-kW transmitters. By 1989, there were 15 transmitters, four of which relayed the Voice of America. . Meanwhile in East Germany, the Nauen site began transmitting Radio DDR, later Radio Berlin International, on October 15, 1959.
In addition to the superpower states, international broadcast services grew in Europe and the Middle East. Under the presidency of Gamal Nasser, Egyptian transmitters covered the Arab world; Israel's service, Kol Yisrael, served both to present the Israeli point of view to the world and to serve the Jewish diaspora, particularly behind the Iron Curtain.
Radio RSA, as part of the South African Broadcasting Corporation, was established in 1966 to promote the image of South Africa internationally and reduce criticism of apartheid. . It continued in 1992, when the post-apartheid government renamed it Channel Africa.
Ironically, the isolationist Albania under Enver Hoxha, virtually a hermit kingdom, became one of the most prolific international broadcasters during the latter decades of the Cold War, with Radio Tirana one of the top five broadcasters in terms of hours of programming produced (Although Radio Tirana's programming was almost universally regarded as insufferably dull).
Daily developments are followed in Radio Netherlands' Media Network blog
An international broadcaster has several options for reaching a foreign audience:
An international broadcaster such as the BBC, Radio France International or Germany's Deutsche Welle, may use all the above methods. Several international broadcasters, such as Swiss Radio International, have abandoned shortwave broadcasting altogether, relying on Internet transmissions only. Others, such as the BBC World Service, have abandoned shortwave transmissions to North America, relying on local relays, the Internet, and satellite transmissions
In addition, many receivers used in Europe and Russia can receive the longwave broadcast band (150 to 280 kHz), which provides reliable long-distance communications over continental distances.
In previous decades shortwave (and sometimes high-powered mediumwave) transmission was regarded as the main (and often the only) way in which broadcasters could reach an international audience. In recent years the proliferation of technologies such as satellite broadcasting, the Internet, and rebroadcasts of programming on AM and FM within target nations has meant that this is no longer necessarily the case.
Transmitter output power has increased since 1920. Higher transmitter powers do guarantee better reception in the target area. Higher transmitter power in most cases counteracts the lesser effects of jamming.
International stations generally use special directional antennas to aim the signal toward the intended audience and increase the effective power in that direction. Use of such antennas for international broadcasting began in the mid 1930s and became prominent by the 1950s. By using these antennas a station may achieve tens of millions of Watts of radio power today.
One of the most common foreign audiences consists of expatriates, who cannot listen to radio or watch television programs from home. Another common audience is radio hobbyists, who attempt to listen as many countries as possible and obtain verification cards or letters (QSLs). A third audience consists of journalists, government officials, and key businesspersons, who exert a disproportionate influence on a state's foreign or economic policy.
A fourth, but less publicized audience, consists of intelligence officers and agents who monitor broadcasts for both open-source intelligence clues to the broadcasting state's policies and for hidden messages to foreign agents operating in the receiving country. The BBC started its monitoring service in Caversham, Reading in 1936 (now BBC Monitoring). In the United States, the DNI Open Source Center (formerly the Central Intelligence Agency's Foreign Broadcast Information Service) provides the same service. Copies of OSC/FBIS reports can be found in many U.S. libraries that serve as government depositories. In addition, a number of hobbyists listen and report "spook" transmissions.
Without these four audiences, international broadcasters face difficulty in getting funding. In 2001, for example, the BBC World Service stopped transmitting shortwave broadcasts to North America, and other international broadcasters, such as YLE Radio Finland, stopped certain foreign-language programs.
However, international broadcasting has been successful when a country does not provide programming wanted by a wide segment of the population. In the 1960s, when there was no BBC service playing rock and roll, Radio Television Luxembourg (RTL) broadcast rock and roll, including bands such as the Beatles, into the United Kingdom. Similar programming came from an unlicensed, or "pirate" station, Radio Caroline, which broadcast from a ship in the international waters of the North Sea.
The idea was copied by Stalin's Soviet Union, which had a nearly identical copy manufactured in the Tesla factory in Czechoslovakia. In North Korea, all receivers are sold with fixed frequencies, tuned to local stations.
The most common method of preventing reception is jamming, or broadcasting a signal on the same frequencies as the international broadcaster. Germany jammed the BBC European service during the Second World War. Russian and Eastern European jammers were aimed against Radio Free Europe, other Western broadcasters, and against Chinese broadcasters during the nadir of Sino-Soviet relations. In 2002, the Cuban government jammed the Voice of America's Radio Marti program and the Chinese government jammed broadcasts made by adherents of Falun Gong.
North Korea restricts most people to a single fixed frequency mediumwave receiver; those who met political requirements and whose work absolutely required familiarity with events abroad were allowed shortwave receivers. Another method of reaching people with government radio programming, but not foreign programming, is the use of radio broadcasting by direct broadcasting to loudspeakers. David Jackson, director of the Voice of America, noted "The North Korean government doesn't jam us, but they try to keep people from listening through intimidation or worse. But people figure out ways to listen despite the odds. They're very resourceful.
Yet another method of preventing reception involves moving a domestic station to the frequency used by the international broadcaster. During the Batista government of Cuba, and during the Castro years, Cuban medium-wave stations broadcast on the frequencies of popular South Florida stations. In October 2002, Iraq changed frequencies of two stations to block the Voice of America's Radio Sawa program.
Jamming can be defeated by using very powerful transmitting antennas, carefully choosing the transmitted frequency, changing transmitted frequency often, using Single Sideband, and properly aiming the receiving antenna.
For a list of international broadcasters, see List of international broadcasters.
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