Wireless telegraphy
Wireless telegraphy or radiotelegraphy is transmission of telegraph signals by radio waves. 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.
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16-line message format1895 in Italy1896 in science1896 in the United Kingdom1897 in science1897 in the United Kingdom1898 in Ireland1898 in the United Kingdom18991899 in the United Kingdom1900s (decade)1909 in science19221927 in aviation1937 in radio19th century in scienceADFGVX cipherARQ-MAdolphus GreelyAerial reconnaissance in World War IAerial telegraphyAetheric transmissionAircrewAlbert WillimskyAlexander KennedyAlexander MuirheadAlexander Popov (film)Alexander Stepanovich PopovAlexanderson DayAlexanderson alternatorAlfred Thomas StoryAllied Communications PublicationsAlternatorAltice PortugalAmalgamated Wireless (Australasia)Amateur radioAmateur radio homebrewAmerican Morse codeAmerican Steamship Company
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Wireless telegraphy
Wireless telegraphy or radiotelegraphy is transmission of telegraph signals by radio waves. 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.
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La Radiotelegrafia o telegrafi ...... nventor de la radiotelegrafia.
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La telegrafía sin hilos es la ...... nados para usos de emergencia.
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La télégraphie sans fil, égale ...... équence devient prépondérant).
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Radiotelegrafie of draadloze t ...... vinder van de radiotelegrafie.
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Sendrata telegrafio, aŭ malpli ...... estu elsendita pere de radio.
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Telegraf bezprzewodowy – radio ...... Republic w styczniu 1906 roku.
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Telegraf nirkabel adalah teleg ...... isebut sebagai readiotelegraf.
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Wireless telegraphy or radiote ...... telegraphy is nearly obsolete.
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Радиотелегра́ф, устаревшее бес ...... и, и реже — в служебной связи.
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Радіотелеграф, застарілий безд ...... рідше — в службовому зв'язку.
@uk
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British Post Office engineers ...... eiver ' on Flat Holm, May 1897
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Typical commercial radiotelegr ...... er tape by a siphon recorder .
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La Radiotelegrafia o telegrafi ...... nventor de la radiotelegrafia.
@ca
La telegrafía sin hilos es la ...... mera Guerra Mundial, cuando el
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La télégraphie sans fil, égale ...... sage de la fréquence devient p
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Radiotelegrafie of draadloze t ...... vinder van de radiotelegrafie.
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Sendrata telegrafio, aŭ malpli ...... onduktaj telegrafiaj sistemoj.
@eo
Telegraf bezprzewodowy – radio ...... Republic w styczniu 1906 roku.
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Telegraf nirkabel adalah teleg ...... listrik dan telegrafi induksi.
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Wireless telegraphy or radiote ...... operator who knows Morse code.
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Радиотелегра́ф, устаревшее бес ...... и, и реже — в служебной связи.
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Радіотелеграф, застарілий безд ...... рідше — в службовому зв'язку.
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Radiotelegrafia
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Radiotelegrafie
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Sendrata telegrafio
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Telegraf bezprzewodowy
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Telegraf nirkabel
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Telegrafía sin hilos
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Télégraphie sans fil
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Wireless telegraphy
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Радиотелеграф
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Радіотелеграф
@uk