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107-494: Far East Broadcasting Company ( FEBC ) is an international Christian radio network. From 1960 to 1994, FEBC owned and operated shortwave radio station KGEI in San Francisco, California. The Philippines is where FEBC began its initial broadcasting. FEBC transferred to Karuhatan Road, Karuhatan in 1948-2011 from Shanghai and finally to 46/F One Corporate Centre . The 2022 FEBC Pioneers' Wall (Bantayog ng Kasaysayan)

214-577: A bill to repeal the 2012 law which made Russian an official language. The bill was not enacted , but the proposal provoked negative reactions in the Russian-speaking regions of Ukraine, intensified by Russian media claiming that the ethnic Russian population was in imminent danger. On 27 February, an interim government was established and early presidential elections were scheduled. The following day, Yanukovych resurfaced in Russia and in

321-478: A crime of aggression under international criminal law and under some countries' domestic criminal codes —including those of Ukraine and Russia—although procedural obstacles exist to prosecutions under these laws. In late February 2014, Russia began to occupy Crimea , marking the beginning of the Russo-Ukrainian War. On 22 and 23 February, in the relative power vacuum immediately after

428-410: A rock music context. In 1975, German electronic music band Kraftwerk recorded a full length concept album around simulated radiowave and shortwave sounds, entitled Radio-Activity . The The 's Radio Cineola monthly broadcasts drew heavily on shortwave radio sound. The development of direct broadcasts from satellites has reduced the demand for shortwave receiver hardware, but there are still

535-535: A " hybrid approach", combining disinformation tactics, irregular fighters, regular Russian troops, and conventional military support. The First Battle of Donetsk Airport followed the Ukrainian presidential elections . It marked a turning point in conflict; it was the first battle between the separatists and the Ukrainian government that involved large numbers of Russian "volunteers". According to Ukraine, at

642-600: A cross-border offensive into Russia's Kursk Oblast in August 2024. Russia has repeatedly carried out deliberate and indiscriminate attacks on civilians far from the frontline. The International Criminal Court (ICC) opened an investigation into war crimes and issued arrest warrants for Putin and several other Russian officials . After the dissolution of the Soviet Union (USSR) in 1991, Ukraine and Russia maintained close ties. In 1994, Ukraine agreed to accede to

749-803: A document claiming that their participation was limited to "offering humanitarian help" to avoid Russian mercenary laws. Russia's anti-mercenary legislation defined a mercenary as someone who "takes part [in fighting] with aims counter to the interests of the Russian Federation". In August 2016, the Ukrainian intelligence service, the SBU , published telephone intercepts from 2014 of Sergey Glazyev (Russian presidential adviser), Konstantin Zatulin , and other people in which they discussed covert funding of pro-Russian activists in Eastern Ukraine,

856-489: A fifty-man unit of pro-Russian militants seized the towns of Sloviansk and Kramatorsk . The heavily armed men were Russian Armed Forces "volunteers" under the command of former GRU colonel Igor Girkin ('Strelkov'). They had been sent from Russian-occupied Crimea and wore no insignia . Girkin said that this action sparked the Donbas War. He said "I'm the one who pulled the trigger of war. If our unit hadn't crossed

963-403: A great number of shortwave broadcasters. A new digital radio technology, Digital Radio Mondiale (DRM), is expected to improve the quality of shortwave audio from very poor to adequate. The future of shortwave radio is threatened by the rise of power line communication (PLC), also known as Broadband over Power Lines (BPL), which uses a data stream transmitted over unshielded power lines. As

1070-421: A large-scale study into the transmission characteristics of short-wavelength waves and to determine their suitability for long-distance transmissions. Franklin rigged up a large antenna at Poldhu Wireless Station , Cornwall , running on 25 kW of power. In June and July 1923, wireless transmissions were completed during nights on 97 meters (about 3 MHz) from Poldhu to Marconi's yacht Elettra in

1177-442: A maximum of 25,000 troops. Russia was required to respect the sovereignty of Ukraine, honor its legislation, not interfere in the internal affairs of the country, and show their "military identification cards" when crossing the international border. Early in the conflict, the agreement's generous troop limit allowed Russia to significantly strengthen its military presence, deploy special forces and other required capabilities to conduct

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1284-628: A new deal with Russia, known as the Kharkiv Pact , to resolve the 2009 Russia–Ukraine gas dispute . The pact extended Russia's stay in Crimea to 2042, with an option to renew. No formal declaration of war has been issued in the ongoing Russo-Ukrainian War. When Putin announced the Russian invasion of Ukraine , he claimed to commence a " special military operation ", side-stepping a formal declaration of war. The statement was, however, regarded by

1391-506: A possible Russian invasion and reinstated conscription to its armed forces. During May, the Ukrainian campaign focused on containing the separatists by securing key positions around the ATO zone to position the military for a decisive offensive once Ukraine's national mobilization had completed. As conflict between the separatists and the Ukrainian government escalated in May, Russia began to employ

1498-607: A press conference, declared that he remained the acting president of Ukraine, just as Russia was commencing a military campaign in Crimea. Leaders of Russian-speaking eastern regions of Ukraine declared continuing loyalty to Yanukovych, triggering the 2014 pro-Russian unrest in Ukraine . At the onset of the Crimean conflict , Russia had roughly 12,000 military personnel from the Black Sea Fleet , in several locations in

1605-417: A result of the multi-layer structure of the ionosphere , propagation often simultaneously occurs on different paths, scattered by the ‘E’ or ‘F’ layer and with different numbers of hops, a phenomenon that may be disturbed for certain techniques. Particularly for lower frequencies of the shortwave band, absorption of radio frequency energy in the lowest ionospheric layer, the ‘D’ layer , may impose

1712-436: A serious limit. This is due to collisions of electrons with neutral molecules, absorbing some of a radio frequency 's energy and converting it to heat. Predictions of skywave propagation depend on: Several different types of modulation are used to incorporate information in a short-wave signal. Amplitude modulation is the simplest type and the most commonly used for shortwave broadcasting . The instantaneous amplitude of

1819-534: A shortwave carrier. These generally require special equipment to decode, such as software on a computer equipped with a sound card. Note that on modern computer-driven systems, digital modes are typically sent by coupling a computer's sound output to the SSB input of a radio. Some established users of the shortwave radio bands may include: Sporadic or non-traditional users of the shortwave bands may include: The World Radiocommunication Conference (WRC), organized under

1926-405: A single transmitter, making it difficult for government authorities to censor them. Shortwave radio is also often used by aircraft. The name "shortwave" originated during the beginning of radio in the early 20th century, when the radio spectrum was divided into long wave (LW), medium wave (MW), and short wave (SW) bands based on the length of the wave. Shortwave radio received its name because

2033-524: A state. On 21 February 2014, following months of protests as part of the Euromaidan movement, Yanukovych and the leaders of the parliamentary opposition signed a settlement agreement that provided for early elections. The following day, Yanukovych fled from the capital ahead of an impeachment vote that stripped him of his powers as president. On 23 February, the Rada (Ukrainian Parliament) adopted

2140-509: A statement agreeing that "these countries will become members of NATO" at some point. Putin strongly opposed Georgia and Ukraine's NATO membership bids. By January 2022, the possibility of Ukraine joining NATO remained remote. In 2009, Yanukovych announced his intent to again run for president in the 2010 Ukrainian presidential election , which he subsequently won. In November 2013, a wave of large, pro– European Union (EU) protests erupted in response to Yanukovych's sudden decision not to sign

2247-513: A substantial period of time, but continued at a low level despite repeated attempts at ceasefire. Both sides began fortifying their position by building networks of trenches , bunkers and tunnels . The relatively static conflict was labelled " frozen " by some, though fighting never completely stopped. Between 2014 and 2022 there were 29 ceasefires , each agreed to remain in force indefinitely. However, none of them lasted more than two weeks. US and international officials continued to report

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2354-532: A very limited spectrum available for long-distance communication, and the very expensive transmitters , receivers and gigantic antennas. Long waves are also difficult to beam directionally, resulting in a major loss of power over long distances. Prior to the 1920s, the shortwave frequencies above 1.5 MHz were regarded as useless for long-distance communication and were designated in many countries for amateur use. Guglielmo Marconi , pioneer of radio, commissioned his assistant Charles Samuel Franklin to carry out

2461-400: Is customarily used below 10 MHz and USB (upper sideband) above 10 MHz, non-amateur services use USB regardless of frequency. Vestigial sideband transmits the carrier and one complete sideband, but filters out most of the other sideband. It is a compromise between AM and SSB, enabling simple receivers to be used, but requires almost as much transmitter power as AM. Its main advantage

2568-458: Is eliminated as well as the residual carrier, only the remaining set is transmitted. This reduces power in the transmission, as roughly 2 ⁄ 3 of the energy sent by an AM signal is in the carrier, which is not needed to recover the information contained in the signal. It also reduces signal bandwidth , enabling less than one-half the AM signal bandwidth to be used. The drawback is the receiver

2675-476: Is for transmitting audio, like the analog modes above. Continuous wave (CW) is on-and-off keying of a sine-wave carrier, used for Morse code communications and Hellschreiber facsimile -based teleprinter transmissions. It is a data mode, although often listed separately. It is typically received via lower or upper SSB modes. Radioteletype , fax, digital, slow-scan television , and other systems use forms of frequency-shift keying or audio subcarriers on

2782-417: Is more complicated, since it must re-create the carrier to recover the signal. Small errors in the detection process greatly affect the pitch of the received signal. As a result, single sideband is not used for music or general broadcast. Single sideband is used for long-range voice communications by ships and aircraft, citizen's band , and amateur radio operators. In amateur radio operation lower sideband (LSB)

2889-463: Is often grouped together with other early-21st century protest movements, particularly within the former USSR , known as colour revolutions . According to Anthony Cordesman , Russian military officers viewed such colour revolutions as attempts by the US and European states to destabilise neighbouring countries and undermine Russia's national security. Russian President Vladimir Putin accused organisers of

2996-549: Is that only half the bandwidth of an AM signal is used. It is used by the Canadian standard time signal station CHU . Vestigial sideband was used for analog television and by ATSC , the digital TV system used in North America. Narrow-band frequency modulation (NBFM or NFM) is used typically above 20 MHz. Because of the larger bandwidth required, NBFM is commonly used for VHF communication. Regulations limit

3103-740: The Heartline FM brand. FEBC Russia runs a number of stations under the Radio Teos brand. FEBA Radio was established in 1959 in the United Kingdom. The FEBC international broadcast station on Saipan in the Commonwealth of the Northern Mariana Islands was established about 1981 and closed in 2011. The local radio station, KSAI 936 AM, was on air for 24 years until shutting down on April 30, 2002. KSAI

3210-763: The 2011–2013 Russian protests of being former advisors to Yushchenko, and described the protests as an attempt to transfer the Orange Revolution to Russia. Rallies in favour of Putin during this period were called " anti-Orange protests ". At the 2008 Bucharest summit , Ukraine and Georgia sought to join NATO. The response among NATO members was divided. Western European countries opposed offering Membership Action Plans (MAP) to Ukraine and Georgia in order to avoid antagonising Russia, while US President George W. Bush pushed for their admission. NATO ultimately refused to offer Ukraine and Georgia MAPs, but also issued

3317-591: The ALLISS antenna technology) to concentrate radio energy at the target area. Shortwave possesses a number of advantages over newer technologies: Shortwave radio's benefits are sometimes regarded as being outweighed by its drawbacks, including: The Asia-Pacific Telecommunity estimates that there are approximately 600 million shortwave broadcast-radio receivers in use in 2002. WWCR claims that there are 1.5 billion shortwave receivers worldwide. Many hobbyists listen to shortwave broadcasters. In some cases,

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3424-821: The Battle of Ilovaisk , between 20,000 and 25,000 troops were fighting in the Donbas on the separatist side, and only 40–45% were "locals". On 24 August 2014, Amvrosiivka was occupied by Russian paratroopers, supported by 250 armoured vehicles and artillery pieces. On 25 August, a column of Russian military vehicles was reported to have crossed into Ukraine near Novoazovsk on the Azov sea coast. It appeared headed towards Ukrainian-held Mariupol , in an area that had not seen pro-Russian presence for weeks. Russian forces captured Novoazovsk . and Russian soldiers began deporting Ukrainians who did not have an address registered within

3531-514: The Cape Verde Islands . In September 1924, Marconi arranged for transmissions to be made day and night on 32 meters (about 9.4 MHz) from Poldhu to his yacht in the harbour at Beirut , to which he had sailed, and was "astonished" to find he could receive signals "throughout the day". Franklin went on to refine the directional transmission by inventing the curtain array aerial system. In July 1924, Marconi entered into contracts with

3638-543: The Charter for European Security , which "reaffirmed the inherent right of each and every participating State to be free to choose or change its security arrangements, including treaties of alliance, as they evolve." In the years after the dissolution of the USSR , several former Eastern Bloc countries joined NATO , partly in response to regional security threats involving Russia such as the 1993 Russian constitutional crisis ,

3745-511: The Crimean peninsula such as Sevastopol, Kacha , Hvardiiske, Simferopol Raion , Sarych , and others. In 2005 a dispute broke out between Russia and Ukraine over control of the Sarych cape lighthouse near Yalta, and a number of other beacons. Russian presence was allowed by the basing and transit agreement with Ukraine. Under this agreement, the Russian military in Crimea was constrained to

3852-639: The EU–Ukraine Association Agreement , instead choosing closer ties to Russia and the Eurasian Economic Union . On 22 February 2013, the Ukrainian parliament overwhelmingly approved of finalizing Ukraine's agreement with the EU. Subsequently, Russia pressured Ukraine to reject this agreement by threatening sanctions . Kremlin adviser Sergei Glazyev stated that if the agreement was signed, Russia could not guarantee Ukraine's status as

3959-612: The Luhansk People's Republic (LPR) as independent states, starting the Donbas war . Russia covertly supported the separatists with its own troops, tanks and artillery, preventing Ukraine from fully retaking the territory. In February 2015, Russia and Ukraine signed the Minsk II agreements, but they were never fully implemented in the years that followed. The Donbas war settled into a violent but static conflict between Ukraine and

4066-799: The Minsk Protocol ceasefire agreement drew a line of demarcation between Ukraine and separatist-controlled portions of Donetsk and Luhansk Oblasts. On 7 and 12 November, NATO officials reconfirmed the Russian presence, citing 32 tanks, 16 howitzer cannons and 30 trucks of troops entering the country. US general Philip M. Breedlove said "Russian tanks, Russian artillery, Russian air defence systems and Russian combat troops" had been sighted. NATO said it had seen an increase in Russian tanks, artillery pieces and other heavy military equipment in Ukraine and renewed its call for Moscow to withdraw its forces. The Chicago Council on Global Affairs stated that Russian separatists enjoyed technical advantages over

4173-545: The NATO military alliance. In early 2022, Russia recognized the DPR and LPR as independent states. On 24 February 2022, Putin announced a " special military operation " to "demilitarize and denazify" Ukraine, claiming Russia had no plans to occupy the country. The Russian invasion that followed was internationally condemned ; many countries imposed sanctions against Russia, and sent humanitarian and military aid to Ukraine . In

4280-664: The Treaty on the Non-Proliferation of Nuclear Weapons as a non-nuclear-weapon state. Former Soviet nuclear weapons in Ukraine were removed and dismantled. In return, Russia, the United Kingdom, and the United States agreed to uphold the territorial integrity and political independence of Ukraine through the Budapest Memorandum on Security Assurances . In 1999, Russia was one of the signatories of

4387-596: The War in Abkhazia (1992–1993) and the First Chechen War (1994–1996). Putin said Western powers broke promises not to let any Eastern European countries join. The 2004 Ukrainian presidential election was controversial. During the election campaign, opposition candidate Viktor Yushchenko was poisoned by TCDD dioxin ; he later accused Russia of involvement. In November, Prime Minister Viktor Yanukovych

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4494-416: The 1920s. By 1928, more than half of long-distance communications had moved from transoceanic cables and longwave wireless services to shortwave, and the overall volume of transoceanic shortwave communications had vastly increased. Shortwave stations had cost and efficiency advantages over massive longwave wireless installations. However, some commercial longwave communications stations remained in use until

4601-421: The 1960s. Long-distance radio circuits also reduced the need for new cables, although the cables maintained their advantages of high security and a much more reliable and better-quality signal than shortwave. The cable companies began to lose large sums of money in 1927. A serious financial crisis threatened viability of cable companies that were vital to strategic British interests. The British government convened

4708-535: The BPL frequencies used overlap with shortwave bands, severe distortions can make listening to analog shortwave radio signals near power lines difficult or impossible. According to Andy Sennitt, former editor of the World Radio TV Handbook , shortwave is a legacy technology, which is expensive and environmentally unfriendly. A few countries are hanging on to it, but most have faced up to the fact that

4815-537: The Beethoven Bicentennial in Opus ;1970 with filtered and distorted snippets of Beethoven pieces – Spiral (1968), Pole , Expo (both 1969–1970), and Michaelion (1997). Cypriot composer Yannis Kyriakides incorporated shortwave numbers station transmissions in his 1999 ConSPIracy cantata . Holger Czukay , a student of Stockhausen, was one of the first to use shortwave in

4922-665: The British General Post Office (GPO) to install high-speed shortwave telegraphy circuits from London to Australia, India, South Africa and Canada as the main element of the Imperial Wireless Chain . The UK-to-Canada shortwave "Beam Wireless Service" went into commercial operation on 25 October 1926. Beam Wireless Services from the UK to Australia, South Africa and India went into service in 1927. Shortwave communications began to grow rapidly in

5029-628: The Crimean peninsula from the rest of Ukraine. In the following days, unmarked Russian special forces occupied airports and communications centers, and blockaded Ukrainian military bases, such as the Southern Naval Base . Russian cyberattacks shut down websites associated with the Ukrainian government, news media, and social media. Cyberattacks also enabled Russian access to the mobile phones of Ukrainian officials and members of parliament, further disrupting communications. On 1 March,

5136-758: The DPR and LPR statelets, prompting Russian cross-border shelling targeted at Ukrainian troops on their own soil, from mid-July onwards. After a series of military defeats and setbacks for the separatists, who united under the banner of " Novorossiya ", Russia dispatched what it called a "humanitarian convoy" of trucks across the border in mid-August 2014. Ukraine called the move a "direct invasion". Ukraine's National Security and Defence Council reported that convoys were arriving almost daily in November (up to 9 convoys on 30 November) and that their contents were mainly arms and ammunition. Strelkov claimed that in early August, Russian servicemen, supposedly on "vacation" from

5243-594: The Imperial Wireless and Cable Conference in 1928 "to examine the situation that had arisen as a result of the competition of Beam Wireless with the Cable Services". It recommended and received government approval for all overseas cable and wireless resources of the Empire to be merged into one system controlled by a newly formed company in 1929, Imperial and International Communications Ltd. The name of

5350-606: The Internet, in that they listen only, and never attempt to send out their own signals. Other listeners participate in clubs, or actively send and receive QSL cards, or become involved with amateur radio and start transmitting on their own. Many listeners tune the shortwave bands for the programmes of stations broadcasting to a general audience (such as Radio Taiwan International , China Radio International , Voice of America , Radio France Internationale , BBC World Service , Voice of Korea , Radio Free Sarawak etc.). Today, through

5457-561: The Revolution of Dignity and the ousting of Ukraine's pro-Russian president Viktor Yanukovych . Shortly after, pro-Russian unrest erupted in eastern and southern Ukraine, while unmarked Russian troops occupied Crimea . Russia soon annexed Crimea after a highly disputed referendum . In April 2014, Russian-backed militants seized towns in Ukraine's eastern Donbas region and proclaimed the Donetsk People's Republic (DPR) and

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5564-475: The Russian and separatist forces, with many brief ceasefires but no lasting peace and few changes in territorial control. Beginning in 2021, there was a massive Russian military buildup near Ukraine's borders, including within neighbouring Belarus . Russian officials repeatedly denied plans to attack Ukraine. Russia's president Vladimir Putin expressed irredentist views and denied Ukraine's right to exist . He demanded that Ukraine be barred from ever joining

5671-428: The Russian military leadership paid soldiers to resign their commissions and fight in Ukraine in the early summer of 2014, and then began ordering soldiers into Ukraine. Russian opposition MP Lev Shlosberg made similar statements, although he said combatants from his country are "regular Russian troops", disguised as units of the DPR and LPR. In early September 2014, Russian state-owned television channels reported on

5778-723: The Russian parliament approved the use of armed forces in Crimea. While Russian special forces occupied Crimea's parliament, it dismissed the Crimean government , installed the pro-Russian Aksyonov government, and announced a referendum on Crimea's status . The referendum was held under Russian occupation and, according to the Russian-installed authorities, the result was in favor of joining Russia. It annexed Crimea on 18 March 2014. Following this, Russian forces seized Ukrainian military bases in Crimea and captured their personnel. On 24 March, Ukraine ordered its remaining troops to withdraw; by 30 March, all Ukrainian forces had left

5885-666: The Russian separatists were voiced by the Conflict Studies Research Centre. At the United Nations Security Council meeting on 12 November, the United Kingdom's representative accused Russia of intentionally constraining OSCE observation missions' capabilities, stating that the observers were allowed to monitor only two kilometers of border, and drones deployed to extend their capabilities were jammed or shot down. In January 2015, Donetsk , Luhansk , and Mariupol represented

5992-534: The Second National Radio Conference in 1923 – forced amateurs to shift to shorter and shorter wavelengths; however, amateurs were limited by regulation to wavelengths longer than 150 meters (2 MHz). A few fortunate amateurs who obtained special permission for experimental communications at wavelengths shorter than 150 meters completed hundreds of long-distance two-way contacts on 100 meters (3 MHz) in 1923 including

6099-425: The Ukrainian army since the large inflow of advanced military systems in mid-2014: effective anti-aircraft weapons (" Buk ", MANPADS) suppressed Ukrainian air strikes, Russian drones provided intelligence, and Russian secure communications system disrupted Ukrainian communications intelligence. The Russian side employed electronic warfare systems that Ukraine lacked. Similar conclusions about the technical advantage of

6206-501: The Ukrainian government as a declaration of war and reported as such by many international news sources. While the Ukrainian parliament refers to Russia as a "terrorist state" in regard to its military actions in Ukraine, it has not issued a formal declaration of war on its behalf. The Russian invasion of Ukraine violated international law (including the Charter of the United Nations ). The invasion has also been called

6313-542: The Ukrainian military in the Donbas War . These first eight years of conflict also included naval incidents and cyberwarfare . In February 2022, Russia launched a full-scale invasion of Ukraine and began occupying more of the country, starting the biggest conflict in Europe since World War II . The war has resulted in a refugee crisis and tens of thousands of deaths. In early 2014, the Euromaidan protests led to

6420-614: The active presence of Russian military in eastern Ukraine, including in the Debaltseve area. In 2015, Russian separatist forces were estimated to number around 36,000 troops (compared to 34,000 Ukrainian), of whom 8,500–10,000 were Russian soldiers. Additionally, around 1,000 GRU troops were operating in the area. Another 2015 estimate held that Ukrainian forces outnumbered Russian forces 40,000 to 20,000. In 2017, on average one Ukrainian soldier died in combat every three days, with an estimated 6,000 Russian and 40,000 separatist troops in

6527-435: The annexation of Crimea, some NATO members began providing training for the Ukrainian army. From late February 2014, demonstrations by pro-Russian and anti-government groups took place in major cities across the eastern and southern regions of Ukraine . The first protests across southern and eastern Ukraine were largely native expressions of discontent with the new Ukrainian government. Russian involvement at this stage

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6634-406: The army, began to arrive in Donbas. By August 2014, the Ukrainian "Anti-Terrorist Operation" shrank the territory under pro-Russian control, and approached the border. Igor Girkin urged Russian military intervention, and said that the combat inexperience of his irregular forces, along with recruitment difficulties amongst the local population, had caused the setbacks. He stated, "Losing this war on

6741-458: The assigned bands, there may be small differences between countries or regions. For example, in the official bandplan of the Netherlands , the 49 m band starts at 5.95 MHz, the 41 m band ends at 7.45 MHz, the 11 m band starts at 25.67 MHz, and the 120 m, 90 m, and 60 m bands are absent altogether. International broadcasters sometimes operate outside

6848-501: The auspices of the International Telecommunication Union , allocates bands for various services in conferences every few years. The last WRC took place in 2023. As of WRC-97 in 1997, these bands were allocated for international broadcasting . AM shortwave broadcasting channels are allocated with a 5 kHz separation for traditional analog audio broadcasting: Although countries generally follow

6955-502: The bandwidth of a signal transmitted in the HF bands, and the advantages of frequency modulation are greatest if the FM signal has a wide bandwidth. NBFM is limited to short-range transmissions due to the multiphasic distortions created by the ionosphere. Digital Radio Mondiale (DRM) is a digital modulation for use on bands below 30 MHz. It is a digital signal, like the data modes, below, but

7062-407: The border, everything would have fizzled out". In response, on 15 April the interim Ukrainian government launched an " Anti-Terrorist Operation " (ATO); however, Ukrainian forces were poorly prepared and ill-positioned and the operation quickly stalled. By the end of April, Ukraine announced it had lost control of the provinces of Donetsk and Luhansk. It claimed to be on "full combat alert" against

7169-431: The carrier is controlled by the amplitude of the signal (speech, or music, for example). At the receiver, a simple detector recovers the desired modulation signal from the carrier. Single-sideband transmission is a form of amplitude modulation but in effect filters the result of modulation. An amplitude-modulated signal has frequency components both above and below the carrier frequency . If one set of these components

7276-593: The company was changed to Cable and Wireless Ltd. in 1934. A resurgence of long-distance cables began in 1956 with the laying of TAT-1 across the Atlantic Ocean, the first voice frequency cable on this route. This provided 36 high-quality telephone channels and was soon followed by even higher-capacity cables all around the world. Competition from these cables soon ended the economic viability of shortwave radio for commercial communication. Amateur radio operators also discovered that long-distance communication

7383-480: The conflict". Poroshenko then recanted. On 5 September Russia's Permanent OSCE Representative Andrey Kelin , said that it was natural that pro-Russian separatists "are going to liberate" Mariupol . Ukrainian forces stated that Russian intelligence groups had been spotted in the area. Kelin said 'there might be volunteers over there.' On 4 September 2014, a NATO officer said that several thousand regular Russian forces were operating in Ukraine. On 5 September 2014,

7490-556: The distribution of radio programs, such as satellite radio and cable broadcasting as well as IP-based transmissions , shortwave broadcasting lost importance. Initiatives for the digitization of broadcasting did not bear fruit either, and so as of 2024 , few broadcasters continue to broadcast programs on shortwave. However, shortwave remains important in war zones, such as in the Russo-Ukrainian war , and shortwave broadcasts can be transmitted over thousands of miles from

7597-474: The end of July, Ukrainian forces were pushing into cities, to cut off supply routes between the two, isolating Donetsk and attempting to restore control of the Russo-Ukrainian border . By 28 July, the strategic heights of Savur-Mohyla were under Ukrainian control, along with the town of Debaltseve , an important railroad hub. These operational successes of Ukrainian forces threatened the existence of

7704-575: The evolution of the Internet, the hobbyist can listen to shortwave signals via remotely controlled or web controlled shortwave receivers around the world, even without owning a shortwave radio. Many international broadcasters offer live streaming audio on their websites and a number have closed their shortwave service entirely, or severely curtailed it, in favour of internet transmission. Shortwave listeners, or SWLs, can obtain QSL cards from broadcasters, utility stations or amateur radio operators as trophies of

7811-528: The face of fierce resistance, Russia abandoned an attempt to take Kyiv in early April. From August, Ukrainian forces began recapturing territories in the north-east and south . In late September, Russia declared the annexation of four partially-occupied provinces, which was internationally condemned . From then through 2023, Russian offensives and Ukrainian counteroffensives gained only small amounts of territory. The invasion has also led to attacks in Russia by Ukrainian and Ukrainian-backed forces, among them

7918-671: The first successful transatlantic tests in December ;1921, operating in the 200 meter mediumwave band (near 1,500 kHz, inside the modern AM broadcast band), which at that time was the shortest wavelength / highest frequency available to amateur radio. In 1922 hundreds of North American amateurs were heard in Europe on 200 meters and at least 20 North American amateurs heard amateur signals from Europe. The first two-way communications between North American and Hawaiian amateurs began in 1922 at 200 meters. Although operation on wavelengths shorter than 200 meters

8025-615: The first transatlantic two-way contacts. By 1924 many additional specially licensed amateurs were routinely making transoceanic contacts at distances of 6,000 miles (9,600 km) and more. On 21 September 1924 several amateurs in California completed two-way contacts with an amateur in New Zealand . On 19 October amateurs in New Zealand and England completed a 90 minute two-way contact nearly halfway around

8132-457: The funerals of Russian soldiers who had died in Ukraine, but described them as "volunteers" fighting for the " Russian world ". Valentina Matviyenko , a top United Russia politician, also praised "volunteers" fighting in "our fraternal nation". On 3 September, Poroshenko said he and Putin had reached a "permanent ceasefire" agreement. Russia denied this, denying that it was a party to the conflict, adding that "they only discussed how to settle

8239-869: The glory days of shortwave have gone. Religious broadcasters will still use it because they are not too concerned with listening figures. However, Thomas Witherspoon, editor of shortwave news site SWLingPost.com wrote that shortwave remains the most accessible international communications medium that still provides listeners with the protection of complete anonymity. Russo-Ukrainian war [REDACTED]   Russia [REDACTED]   Ukraine [REDACTED]   Russia [REDACTED]   Ukraine Post-Minsk II conflict Attacks on civilians Related The Russo-Ukrainian War began in February 2014. Following Ukraine's Revolution of Dignity , Russia occupied and annexed Crimea from Ukraine and supported pro-Russian separatists fighting

8346-472: The goal is to hear as many stations from as many countries as possible ( DXing ) ; others listen to specialized shortwave utility, or "ute", transmissions such as maritime, naval, aviation, or military signals. Others focus on intelligence signals from numbers stations , stations which transmit strange broadcast usually for intelligence operations, or the two way communications by amateur radio operators. Some short wave listeners behave analogously to "lurkers" on

8453-492: The harmonics of natural sound and creating at times a strange "spacey" quality due to echoes and phase distortion. Evocations of shortwave reception distortions have been incorporated into rock and classical compositions, by means of delays or feedback loops, equalizers, or even playing shortwave radios as live instruments. Snippets of broadcasts have been mixed into electronic sound collages and live musical instruments, by means of analogue tape loops or digital samples . Sometimes

8560-426: The height of the conflict in the summer of 2014, Russian paramilitaries made up between 15% and 80% of the combatants. From June Russia trickled in arms, armor, and munitions. On 17 July 2014, Russian-controlled forces shot down a passenger aircraft, Malaysia Airlines Flight 17 , as it was flying over eastern Ukraine. Investigations and the recovery of bodies began in the conflict zone as fighting continued. By

8667-573: The hobby. Some stations even give out special certificates, pennants, stickers and other tokens and promotional materials to shortwave listeners. Some musicians have been attracted to the unique aural characteristics of shortwave radio which – due to the nature of amplitude modulation, varying propagation conditions, and the presence of interference – generally has lower fidelity than local broadcasts (particularly via FM stations). Shortwave transmissions often have bursts of distortion, and "hollow" sounding loss of clarity at certain aural frequencies, altering

8774-594: The last high-intensity battle of the Donbas war until 2022. In September 2015 the United Nations Human Rights Office estimated that 8,000 casualties had resulted from the conflict in eastern Ukraine. After the Minsk agreements, there were few changes in territorial control, while the war settled into static trench warfare around the agreed line of contact, marked by artillery duels and special forces operations. Hostilities never ceased for

8881-816: The normal the WRC-allocated bands or use off-channel frequencies. This is done for practical reasons, or to attract attention in crowded bands (60 m, 49 m, 40 m, 41 m, 31 m, 25 m). The new digital audio broadcasting format for shortwave DRM operates 10 kHz or 20 kHz channels. There are some ongoing discussions with respect to specific band allocation for DRM, as it mainly transmitted in 10 kHz format. The power used by shortwave transmitters ranges from less than one watt for some experimental and amateur radio transmissions to 500 kilowatts and higher for intercontinental broadcasters and over-the-horizon radar . Shortwave transmitting centers often use specialized antenna designs (like

8988-674: The operation in Crimea, under the pretext of addressing security concerns. According to the original treaty on the division of the Soviet Black Sea Fleet signed in 1997, Russia was allowed to have its military bases in Crimea until 2017, after which it would evacuate all military units including its portion of the Black Sea Fleet from the Autonomous Republic of Crimea and Sevastopol. On 21 April 2010, former Ukrainian president Viktor Yanukovych signed

9095-429: The ousting of Yanukovych, Russian troops and special forces were moved close to the border with Crimea. On 27 February, Russian forces without insignia began to occupy Crimea. Russia consistently denied that the soldiers were theirs, instead claiming they were local "self-defense" units. They seized the Crimean parliament and government buildings , as well as setting up checkpoints to restrict movement and cut off

9202-534: The ownership of Saved Radio from its original owner Becca Music in 2022, effectively shutting down its previous station Now XD. FEBC owns a number of stations in South Korea , one of them being known as HLAZ. (HLDY) (HLAD) 5 kW Gongju 500w (HLEN) (HLED) (HLKW) (HLEI) (HLKK) (HLDZ) (HLQQ) (HLQR) (HLDD) YASKI is the name for FEBC in Indonesia . It runs a number of stations under

9309-400: The peninsula. On 15 April, the Ukrainian parliament declared Crimea a territory temporarily occupied by Russia . After the annexation, the Russian government militarized the peninsula and made nuclear threats. Putin said that a Russian military task force would be established in Crimea. In November, NATO stated that it believed Russia was deploying nuclear-capable weapons to Crimea. After

9416-489: The region. Cases of killed and wounded Russian soldiers were discussed in local Russian media. Recruiting for Donbas was performed openly via veteran and paramilitary organisations. Vladimir Yefimov, leader of one such organisation, explained how the process worked in the Ural area. The organisation recruited mostly army veterans, but also policemen, firefighters etc. with military experience. The cost of equipping one volunteer

9523-651: The separatist movement, supported by volunteers and materiel from Russia, including Chechen and Cossack fighters. According to Donetsk People's Republic (DPR) commander Igor Girkin , without this support in April, the movement would have dissipated, as it had in Kharkiv and Odesa . The separatist groups held disputed referendums in May, which were not recognised by Ukraine or any other UN member state. In April 2014, armed conflict began in eastern Ukraine between Russian-backed separatists and Ukraine. On 12 April,

9630-455: The sounds of instruments and existing musical recordings are altered by remixing or equalizing, with various distortions added, to replicate the garbled effects of shortwave radio reception. The first attempts by serious composers to incorporate radio effects into music may be those of the Russian physicist and musician Léon Theremin , who perfected a form of radio oscillator as a musical instrument in 1928 ( regenerative circuits in radios of

9737-651: The station shut down in 1984. Shortwave radio Radio waves in the shortwave band can be reflected or refracted from a layer of electrically charged atoms in the atmosphere called the Ionosphere . Therefore, short waves directed at an angle into the sky can be reflected back to Earth at great distances, beyond the horizon. This is called skywave or "skip" propagation . Thus shortwave radio can be used for communication over very long distances, in contrast to radio waves of higher frequency, which travel in straight lines ( line-of-sight propagation ) and are limited by

9844-606: The territory that President Vladimir Putin personally named New Russia would threaten the Kremlin's power and, personally, the power of the president". In response to the deteriorating situation, Russia abandoned its hybrid approach, and began a conventional invasion on 25 August 2014. On the following day, the Russian Defence Ministry said these soldiers had crossed the border "by accident". According to Nikolai Mitrokhin's estimates, by mid-August 2014 during

9951-521: The three battle fronts. Poroshenko described a dangerous escalation on 21 January amid reports of more than 2,000 additional Russian troops, 200 tanks and armed personnel carriers crossing the border. He abbreviated his visit to the World Economic Forum because of his concerns. A new package of measures to end the conflict, known as Minsk II , was agreed on 15 February 2015. On 18 February, Ukrainian forces withdrew from Debatlseve , in

10058-480: The time were prone to breaking into oscillation , adding various tonal harmonics to music and speech); and in the same year, the development of a French instrument called the Ondes Martenot by its inventor Maurice Martenot , a French cellist and former wireless telegrapher. Karlheinz Stockhausen used shortwave radio and effects in works including Hymnen (1966–1967), Kurzwellen (1968) – adapted for

10165-813: The town. Pro-Ukrainian anti-war protests took place in Mariupol . The UN Security Council called an emergency meeting. The Pskov -based 76th Guards Air Assault Division allegedly entered Ukrainian territory in August and engaged in a skirmish near Luhansk , suffering 70 - 80 dead . The Ukrainian Defence Ministry said that they had seized two of the unit's armoured vehicles near Luhansk, and reported destroying another three tanks and two armoured vehicles in other regions. The speaker of Russia's upper house of parliament and Russian state television channels acknowledged that Russian soldiers entered Ukraine, but referred to them as "volunteers". A reporter for Novaya Gazeta , an opposition newspaper in Russia, stated that

10272-454: The visual horizon, about 64 km (40 miles). Shortwave broadcasts of radio programs played an important role in the early days of radio history. In World War II it was used as a propaganda tool for an international audience. The heyday of international shortwave broadcasting was during the Cold War between 1960 and 1980. With the wide implementation of other technologies for

10379-414: The wavelengths in this band are shorter than 200 m (1,500 kHz) which marked the original upper limit of the medium frequency band first used for radio communications. The broadcast medium wave band now extends above the 200 m / 1,500 kHz limit. Early long-distance radio telegraphy used long waves, below 300  kilohertz (kHz) / above 1000 m. The drawbacks to this system included

10486-635: The world. On 10 October the Third National Radio Conference made three shortwave bands available to U.S. amateurs at 80 meters (3.75 MHz), 40 meters (7 MHz) and 20 meters (14 MHz). These were allocated worldwide, while the 10 meter band (28 MHz) was created by the Washington International Radiotelegraph Conference on 25 November 1927. The 15 meter band (21 MHz)

10593-560: Was declared the winner, despite allegations of vote-rigging by election observers. During a two-month period which became known as the Orange Revolution, large peaceful protests successfully challenged the outcome. After the Supreme Court of Ukraine annulled the initial result due to widespread electoral fraud , a second round re-run was held, bringing to power Yushchenko as president and Yulia Tymoshenko as prime minister, and leaving Yanukovych in opposition. The Orange Revolution

10700-605: Was estimated at 350,000 rubles (around $ 6500) plus salary of 60,000 to 240,000 rubles per month. The recruits received weapons only after arriving in the conflict zone. Often, Russian troops traveled disguised as Red Cross personnel. Igor Trunov, head of the Russian Red Cross in Moscow, condemned these convoys, saying they complicated humanitarian aid delivery. Russia refused to allow OSCE to expand its mission beyond two border crossings. The volunteers were issued

10807-801: Was initially established in Saipan by the United States Office of War Information (OWI) in June 1945. There was an FEBC station in Okinawa starting in 1958. After the reversion agreement, the station became a commercial operation ( Kyokuto Hoso Radio ) as religious broadcasters were forbidden under the Law on Special Measures for the Reversion of Okinawa . Per a decision taken by the Diet of Japan in 1983,

10914-493: Was limited to voicing support for the demonstrations. Russia exploited this, however, launching a coordinated political and military campaign against Ukraine. Putin gave legitimacy to the separatists when he described the Donbas as part of " New Russia " ( Novorossiya ), and expressed bewilderment as to how the region had ever become part of Ukraine. Russia continued to marshal forces near Ukraine's eastern border in late March, reaching 30–40,000 troops by April. The deployment

11021-544: Was opened to amateurs in the United States on 1 May 1952. Shortwave radio frequency energy is capable of reaching any location on the Earth as it is influenced by ionospheric reflection back to Earth by the ionosphere , (a phenomenon known as " skywave propagation"). A typical phenomenon of shortwave propagation is the occurrence of a skip zone where reception fails. With a fixed working frequency, large changes in ionospheric conditions may create skip zones at night. As

11128-472: Was possible on shortwave bands. Early long-distance services used surface wave propagation at very low frequencies , which are attenuated along the path at wavelengths shorter than 1,000 meters. Longer distances and higher frequencies using this method meant more signal loss. This, and the difficulties of generating and detecting higher frequencies, made discovery of shortwave propagation difficult for commercial services. Radio amateurs may have conducted

11235-405: Was technically illegal (but tolerated at the time as the authorities mistakenly believed that such frequencies were useless for commercial or military use), amateurs began to experiment with those wavelengths using newly available vacuum tubes shortly after World War I. Extreme interference at the longer edge of the 150–200 meter band – the official wavelengths allocated to amateurs by

11342-607: Was unveiled at the former Christian Radio City Manila (CRCM) or FEBC compound in Valenzuela. The First Filipino leaders included Rev. Proceso Marcelo, Rev. Ferico Magbanua and Rev. Maximo Atienza. FEBC operates its shortwave broadcasts on SW 15580 in different languages, transmitting from its facilities in Bocaue, Bulacan and Iba, Zambales . FEBC Philippines also owns Saved Radio , a Contemporary Christian-formatted music station currently available on internet radio. FEBC took over

11449-445: Was used to threaten escalation and disrupt Ukraine's response. This threat forced Ukraine to divert forces to its borders instead of the conflict zone. Ukrainian authorities cracked down on the pro-Russian protests and arrested local separatist leaders in early March. Those leaders were replaced by people with ties to the Russian security services and interests in Russian businesses. By April 2014, Russian citizens had taken control of

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