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NHK Kawaguchi Transmitter
The NHK Kawaguchi Transmitter was a medium-wave broadcasting station at Kawaguchi, Saitama, Japan, which was built in 1937. It used for transmissions on 590 kHz with a power of 150 kW, a T-antenna, which was spun between two 312.78-metre-tall guyed masts, which were 463 m apart and which were both insulated against ground. The masts of NHK Kawaguchi Transmitter were until erection of Tokyo Tower the tallest towers of Japan and belonged at time of completion to the tallest man-made structures of the world. The antenna was built as T-antenna and not as mast radiator, as the technology of building tall mast radiators insulated against ground was not very well developed in Japan at the time. After the completion of Shobu-Kuki tower, a 240-meter-tall mast radiator in Saitama Prefecture, NHK Kawaguchi Transmitter went out of service in 1982. In 1984 the towers were dismantled with a crane. In the neighbourhood of the masts, in the 1970s a 110-metre-tall mast radiator ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Medium Wave
Medium wave (MW) is the part of the medium frequency (MF) radio band used mainly for AM radio broadcasting. The spectrum provides about 120 channels with more limited sound quality than FM stations on the FM broadcast band. During the daytime, reception is usually limited to more local stations, though this is dependent on the signal conditions and quality of radio receiver used. Improved signal propagation at night allows the reception of much longer distance signals (within a range of about 2,000 km or 1,200 miles). This can cause increased interference because on most channels multiple transmitters operate simultaneously worldwide. In addition, amplitude modulation (AM) is often more prone to interference by various electronic devices, especially power supplies and computers. Strong transmitters cover larger areas than on the FM broadcast band but require more energy and longer antennas. Digital modes are possible but have not reached momentum yet. MW was the main radi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kawaguchi, Saitama
is a city located in Saitama Prefecture, Japan. , the city had an estimated population of 607,373 in 293,582 households and a population density of 9800 persons per km². The total area of the city is . It is the Greater Tokyo Area's 8th most populated city (after passing Hachioji), and second largest in Saitama Prefecture. Geography Kawaguchi is located near the center of the Kantō Plain in southern Saitama Prefecture, and is bordered by the Tokyo wards of Kita-ku and Adachi-ku to the south. The city area is mostly flat and mainly residential except for the Omiya tableland, which occupies part of the north and east area. The Arakawa River runs across the border with Kita-ku to the south. Surrounding municipalities Saitama Prefecture * Koshigaya * Sōka * Saitama * Warabi * Toda Tokyo Metropolis * Kita * Adachi Climate Kawaguchi has a humid subtropical climate (Köppen ''Cfa'') characterized by warm summers and cool winters with light to no snowfall. The average a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Japan
Japan ( ja, 日本, or , and formally , ''Nihonkoku'') is an island country in East Asia. It is situated in the northwest Pacific Ocean, and is bordered on the west by the Sea of Japan, while extending from the Sea of Okhotsk in the north toward the East China Sea, Philippine Sea, and Taiwan in the south. Japan is a part of the Ring of Fire, and spans an archipelago of 6852 islands covering ; the five main islands are Hokkaido, Honshu (the "mainland"), Shikoku, Kyushu, and Okinawa. Tokyo is the nation's capital and largest city, followed by Yokohama, Osaka, Nagoya, Sapporo, Fukuoka, Kobe, and Kyoto. Japan is the eleventh most populous country in the world, as well as one of the most densely populated and urbanized. About three-fourths of the country's terrain is mountainous, concentrating its population of 123.2 million on narrow coastal plains. Japan is divided into 47 administrative prefectures and eight traditional regions. The Greater Tokyo Ar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
T-antenna
A T-antenna, T-aerial, flat-top antenna, or (capacitively) top-loaded antenna is a monopole radio antenna with transverse capacitive loading wires attached to its top. T-antennas are typically used in the VLF, LF, MF, and shortwave bands, and are widely used as transmitting antennas for amateur radio stations, and long wave and medium wave AM broadcasting stations. They can also be used as receiving antennas for shortwave listening. The antenna consists of one or more horizontal wires suspended between two supporting radio masts or buildings and insulated from them at the ends. A vertical wire is connected to the center of the horizontal wires and hangs down close to the ground, connected to the transmitter or receiver. Combined, the two sections form a ‘T’ shape, hence the name. The transmitter power is applied, or the receiver is connected, between the bottom of the vertical wire and a ground connection. The T-antenna functions as a monopole antenna with capaci ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tokyo Tower
is a communications and observation tower in the Shiba-koen district of Minato, Tokyo, Japan, built in 1958. At , it is the second- tallest structure in Japan. The structure is an Eiffel Tower-inspired lattice tower that is painted white and international orange to comply with air safety regulations. The tower's main sources of income are tourism and antenna leasing. Over 150 million people have visited the tower. FootTown, a four-story building directly under the tower, houses museums, restaurants, and shops. Departing from there, guests can visit two observation decks. The two-story Main Deck (formerly known as the Main Observatory) is at , while the smaller Top Deck (formerly known as the "Special Observatory") reaches a height of . The names were changed following renovation of the top deck in 2018. The tower is repainted every five years, taking a year to complete the process. In 1961, transmission antennae were added to the tower. They are used for radio and tel ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mast Radiator
Mast, MAST or MASt may refer to: Engineering * Mast (sailing), a vertical spar on a sailing ship * Flagmast, a pole for flying a flag * Guyed mast, a structure supported by guy-wires * Mooring mast, a structure for docking an airship * Radio masts and towers , towers that carry antennas * The primary support for a helicopter rotor * The main vertical structure of a forklift truck * Multi-axis shaker table, an automotive test system * Model for assessment of telemedicine, used to assess long-distance medical treatment Biology * Mast (botany), the edible parts of woody plants * Mast Arboretum, at Stephen F. Austin State University in Nacogdoches, Texas * Mast cell, involved in the allergy response * Mast., in botanical naming, the standard author abbreviation for Maxwell T. Masters * Two microtubule-associated serine/threonine-protein kinase enzymes: ** MAST1, an enzyme that in humans is encoded by the ''MAST1'' gene ** MAST2, an enzyme that in humans is encoded by the ''MAST2'' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Shobu-Kuki Transmitter
The is located in Kuki, Saitama. It is the largest centre for medium wave and short wave broadcasting in Japan. It is fed over a 60,000 volt power line and there are two large medium wave broadcasting antennas, one of them 240 metres tall. The centre is operated by NHK , also known as NHK, is a Japanese public broadcaster. NHK, which has always been known by this romanized initialism in Japanese, is a statutory corporation funded by viewers' payments of a television license fee. NHK operates two terrestri .... External links NHK Shōbu-Kuki Rajio Hōsō-sho(in Japanese) Buildings and structures in Saitama Prefecture NHK Towers in Japan {{japan-struct-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Saitama Prefecture
is a landlocked prefecture of Japan located in the Kantō region of Honshu. Saitama Prefecture has a population of 7,338,536 (1 January 2020) and has a geographic area of 3,797 km2 (1,466 sq mi). Saitama Prefecture borders Tochigi Prefecture and Gunma Prefecture to the north, Nagano Prefecture to the west, Yamanashi Prefecture to the southwest, Tokyo to the south, Chiba Prefecture to the southeast, and Ibaraki Prefecture to the northeast. Saitama is the capital and largest city of Saitama Prefecture, with other major cities including Kawaguchi, Kawagoe, and Tokorozawa. Saitama Prefecture is part of the Greater Tokyo Area, the most populous metropolitan area in the world, and many of its cities are described as bedroom communities and suburbs of Tokyo with many residents commuting into the city each day. History According to ''Sendai Kuji Hongi'' ('' Kujiki''), Chichibu was one of 137 provinces during the reign of Emperor Sujin. Chichibu Province was in western ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Surrender Of Japan
The surrender of the Empire of Japan in World War II was announced by Emperor Hirohito on 15 August and formally signed on 2 September 1945, bringing the war's hostilities to a close. By the end of July 1945, the Imperial Japanese Navy (IJN) had become incapable of conducting major operations and an Allied invasion of Japan was imminent. Together with the United Kingdom and China, the United States called for the unconditional surrender of the Japanese armed forces in the Potsdam Declaration on 26 July 1945—the alternative being "prompt and utter destruction". While publicly stating their intent to fight on to the bitter end, Japan's leaders (the Supreme Council for the Direction of the War, also known as the "Big Six") were privately making entreaties to the publicly neutral Soviet Union to mediate peace on terms more favorable to the Japanese. While maintaining a sufficient level of diplomatic engagement with the Japanese to give them the impression they might be ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Imperial Japanese Army
The was the official ground-based armed force of the Empire of Japan from 1868 to 1945. It was controlled by the Imperial Japanese Army General Staff Office and the Ministry of the Army, both of which were nominally subordinate to the Emperor of Japan as supreme commander of the army and the Imperial Japanese Navy. Later an Inspectorate General of Aviation became the third agency with oversight of the army. During wartime or national emergencies, the nominal command functions of the emperor would be centralized in an Imperial General Headquarters (IGHQ), an ad hoc body consisting of the chief and vice chief of the Army General Staff, the Minister of the Army, the chief and vice chief of the Naval General Staff, the Inspector General of Aviation, and the Inspector General of Military Training. History Origins (1868–1871) In the mid-19th century, Japan had no unified national army and the country was made up of feudal domains (''han'') with the Tokugawa shogunate (''bakuf ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Far East Network
The Far East Network (FEN) was a network of American military radio and television stations, primarily serving U.S. Forces in Japan, Okinawa, the Philippines, and Guam. Overview Now known as the American Forces Network-Japan (AFN-Japan), with the disestablishment in 1997 of the Far East Network, this network provides military members, Department of Defense civilian employees, and State Department diplomatic personnel and their families with news, information and entertainment by over-the-air radio and TV, and by base cable television. In addition to its primary military and authorized U.S. civilian audience, AFN-Japan also has a "shadow audience" of an estimated 1.2 million non-military listeners; mostly Japanese studying English, and other English-speaking foreign nationals residing in Japan. AFN-Japan is headquartered at Yokota Air Base, a major U.S. Air Force installation on the outskirts of Tokyo, and is also known as "AFN-Tokyo". The network has affiliates located a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Towers In Japan
A tower is a tall structure, taller than it is wide, often by a significant factor. Towers are distinguished from masts by their lack of guy-wires and are therefore, along with tall buildings, self-supporting structures. Towers are specifically distinguished from buildings in that they are built not to be habitable but to serve other functions using the height of the tower. For example, the height of a clock tower improves the visibility of the clock, and the height of a tower in a fortified building such as a castle increases the visibility of the surroundings for defensive purposes. Towers may also be built for observation, leisure, or telecommunication purposes. A tower can stand alone or be supported by adjacent buildings, or it may be a feature on top of a larger structure or building. Etymology Old English ''torr'' is from Latin ''turris'' via Old French ''tor''. The Latin term together with Greek τύρσις was loaned from a pre-Indo-European Mediterranean languag ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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