File:Quenched spark transmitter - Nauen Radio Station, Nauen Germany 1921.jpg
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Summary
[edit]DescriptionQuenched spark transmitter - Nauen Radio Station, Nauen Germany 1921.jpg |
English: 100 kW longwave quenched spark gap transmitter at Nauen Radiotelegraphy Station, Nauen, Germany, in 1921. Built by AEG/Telefunken in 1906, this was Germany's most powerful radio station, which provided communication with the outside world during World War 1 when Germany's telegraph cables were cut. This transmitter was built in 1913 but was continuously updated with cutting edge technology. It transmitted on various frequencies between 43 and 100 kHz and had a range of up to 9000 km, sending commercial and diplomatic telegram traffic to Europe, North America and Germany's colonies in Africa by radiotelegraphy, using pulses of radio waves which spelled out text messages in high speed Morse code. The book discusses the components labeled in the picture:
(A) Four relays in the primary circuit of the transformer which keyed the transmitter, operated by a telegraph key in the operations room. |
Date | |
Source | Retrieved 26 January 2020 from Leggett, Bernard John 1921 Wireless Telegraphy, with special reference to the Quenched-Spark System, E.F. Dutton and Co., New York fig.150, following p. 296 on Google Books |
Author | Bernard John Leggett |
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[edit]Public domainPublic domainfalsefalse |
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This work is in the public domain in the United States because it was published (or registered with the U.S. Copyright Office) before January 1, 1929.
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Note: This tag should not be used for sound recordings.PD-1923Public domain in the United States//commons.wikimedia.org/wiki/File:Quenched_spark_transmitter_-_Nauen_Radio_Station,_Nauen_Germany_1921.jpg |
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current | 14:01, 3 May 2021 | ![]() | 823 × 607 (165 KB) | Materialscientist (talk | contribs) | fft |
01:44, 27 January 2020 | ![]() | 823 × 607 (129 KB) | Chetvorno (talk | contribs) | User created page with UploadWizard |
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Author | Chris Burks |
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Horizontal resolution | 96 dpi |
Vertical resolution | 96 dpi |
Software used | GIMP 2.4.7 |
File change date and time | 16:01, 3 May 2021 |
Unique ID of original document | xmp.did:eb480c52-dd9b-4e3f-ae3a-410c73c5989f |