Wireless telegraphy or radiotelegraphy is transmission of text messages by radio waves, analogous to electrical telegraphy using cables. Before about 1910, the term wireless telegraphy was also used for other experimental technologies for transmitting telegraph signals without wires. In radiotelegraphy, information is transmitted by pulses of radio waves of two different lengths called "dots" and "dashes", which spell out text messages, usually in Morse code. In a manual system, the sending operator taps on a switch called a telegraph key which turns the transmitter on and off, producing the pulses of radio waves. At the receiver the pulses are audible in the receiver's speaker as beeps, which are translated back to text by an operator who knows Morse code.
Boden Fortress is a modern fortress consisting of several major and minor forts and fortifications surrounding the city of Boden, Norrbotten, in northern Sweden. The fortress was originally intended to stop or delay attacks from the east or coastal assaults, which at the time of construction meant Russian attacks launched from Finland. It was primarily the expansion of the railway net in Norrland, which in turn was a consequence of the rising importance of the northern iron ore fields, that led to the increased strategic value of northern Sweden and the construction of the fortress. Although the main forts were finished in 1908, many of the supporting fortifications were not completed until the start of the First World War. Improvements were also continuously made during, and between, both World Wars.
Luleå is a city on the coast of northern Sweden, and the capital of Norrbotten County, the northernmost county in Sweden. Luleå has 48,728 inhabitants in its urban core as of 2018 and is the seat of Luleå Municipality with a total population of about 79,000 as of 2023. Luleå is Sweden's 25th largest city and Norrbotten County's largest city. Luleå is considered as the world's largest brackish water archipelago with 1,312 islands, several rivers and vast forestland.
Ernst Frederick Werner Alexanderson was a Swedish-American electrical engineer, who was a pioneer in radio and television development. He invented the Alexanderson alternator, an early radio transmitter used between 1906 and the 1930s for longwave long distance radio transmission. Alexanderson also created the amplidyne, a direct current amplifier used during the Second World War for controlling anti-aircraft guns.
Grimeton Radio Station in southern Sweden, close to Varberg in Halland, is an early longwave transatlantic wireless telegraphy station built in 1922–1924, that has been preserved as a historical site. From the 1920s through the 1940s it was used to transmit telegram traffic by Morse code to North America and other countries, and during World War II was Sweden's only telecommunication link with the rest of the world. It is the only remaining example of an early pre-electronic radio transmitter technology called an Alexanderson alternator. It was added to the UNESCO World Heritage List in 2004, with the statement: "Grimeton Radio Station, Varberg is an exceptionally well preserved example of a type of telecommunication centre, representing the technological achievements by the early 1920s, as well as documenting the further development over some three decades." The radio station is also an anchor site for the European Route of Industrial Heritage. The transmitter is still in operational condition, and each year on a day called Alexanderson Day is started up and transmits brief Morse code test transmissions, which can be received all over Europe.
Lule River is a major river in Sweden, rising in northern Sweden and flowing southeast for 460 km (290 mi) before reaching the Gulf of Bothnia at Luleå. It is the second longest river by watershed area or length in Norrbotten County, but is the largest by average discharge.
KXAS-TV is a television station licensed to Fort Worth, Texas, United States, serving as the NBC outlet for the Dallas–Fort Worth metroplex. It is owned and operated by the network's NBC Owned Television Stations division alongside Dallas-licensed Telemundo station KXTX-TV. The two stations share studios at the CentrePort Business Park in eastern Fort Worth; KXAS-TV's transmitter is located in Cedar Hill, Texas.
Bodens BK is a Swedish football club located in Boden in Norrbotten. The club was formed on 2 November 1916 and began playing soccer in 1918. It is currently playing in the third tier of Swedish football, Division 1.
KTXH, branded on-air as My20 Vision, is a television station in Houston, Texas, United States, serving as the local outlet for the MyNetworkTV programming service. It is owned and operated by Fox Television Stations alongside Fox outlet KRIV. The two stations share studios on Southwest Freeway in Houston; KTXH's transmitter is located near Missouri City, Texas.
In broadcasting and radio communications, a call sign is a unique identifier for a transmitter station. A call sign can be formally assigned by a government agency, informally adopted by individuals or organizations, or even cryptographically encoded to disguise a station's identity.
KTCK-FM is a commercial radio station licensed to Flower Mound, Texas, and serving the Dallas/Fort Worth Metroplex. It simulcasts a sports radio format, along with sister station KTCK. KTCK-AM-FM are owned by Cumulus Media with studios on East Lamar Boulevard in Arlington. Weekdays feature local Dallas-based sports shows, while Fox Sports Radio is heard late nights and weekends. KTCK-AM-FM are the flagship stations for the Dallas Stars Radio Network.
A radiogram is a formal written message transmitted by radio. Also known as a radio telegram or radio telegraphic message, radiograms use a standardized message format, form and radiotelephone and/or radiotelegraph transmission procedures. These procedures typically provide a means of transmitting the content of the messages without including the names of the various headers and message sections, so as to minimize the time needed to transmit messages over limited and/or congested radio channels. Various formats have been used historically by maritime radio services, military organizations, and Amateur Radio organizations.
Apostasy is a Swedish black metal band formed in 2000.
Nauen Transmitter Station in Nauen, Havelland district, Brandenburg, Germany, is the oldest continuously operating radio transmitting installation in the world. Germany's first high power radio transmitter, it was founded on 1 April 1906 by Telefunken corporation and operated as a longwave radiotelegraphy station through World War II, and during World War I became Germany's main link with the outside world when its submarine communications cables were cut. Upgraded with shortwave transmitters in the 1920s it was Germany's most advanced long range radio station, continually upgraded with the latest equipment and serving as an experimental station for Telefunken to test new technology. At the end of World War II, invading Russian troops dismantled and removed the transmitting equipment. During the Cold War it served as the GDR's international shortwave station Radio Berlin International (RBI), and was the East Bloc's second most powerful radio station, disseminating Communist propaganda to other countries. Since German Reunification in 1991 it has been operated by Deutsche Telekom, Germany's state telecommunication service. The original 1920 transmitter building designed by architect Herman Muthesius is still used; it is one of the many remaining buildings designed by that architect that is a protected cultural heritage site.
The Norrland Engineer Battalion, designation Ingbat/I 19, originally Boden Engineer Regiment, designation Ing 3, was a Swedish Army engineer unit, one of the few new formations raised in the 20th century. It was disbanded in 2005. The unit was garrisoned in Boden, Sweden.
Boden is a locality and the seat of Boden Municipality in Norrbotten County, Sweden with 16,847 inhabitants in 2018. It is part of the larger area around coastal city Luleå some 36 kilometres (22 mi) southeast. After Kiruna, it is the second largest town in Northern Sweden's interior.
Degerberget Fort is a modern fort, part of Boden Fortress, outside the city of Boden, Norrbotten, in northern Sweden. The fort was finished in 1908 but improvements were also continuously made during, and between, both World Wars. Besides its military role, the fort also served as storage for part of the Swedish gold reserve for over 40 years. Degerberget Fort was decommissioned in 1992.
Boden Garrison is a major garrison in Sweden, located in and around Boden in Norrbotten County. The garrison has during the 20th century been, and still is, the largest garrison in Sweden, consisting of several units of the Swedish Armed Forces as well as Boden Fortress.
Boden Artillery Regiment is an artillery unit within the Swedish Army that operated in various forms from 1919 to 2004 and again from 2022. It is based in Boden Garrison in Boden.
