magnetic wire recorder, arc converter radio transmitter
Valdemar Poulsen (23 November 1869 – 6 August 1942) was a Danish engineer who developed a magnetic wire recorder called the telegraphone in 1898. He also made significant contributions to early radio technology, including the first continuous wave radio transmitter, the Poulsen arc, [1] which was used for a majority of the earliest audio radio transmissions, before being supplanted by the development of vacuum-tube transmitters.[2]
^"Wireless Telephony", Electrical World, December 8, 1906, page 1121.
^Amateur Radio by Maurice J. Grainger, 1922, page 87.
ValdemarPoulsen (23 November 1869 – 6 August 1942) was a Danish engineer who developed a magnetic wire recorder called the telegraphone in 1898. He also...
converter, sometimes called the arc transmitter, or Poulsen arc after Danish engineer ValdemarPoulsen who invented it in 1903, was a variety of spark transmitter...
The ValdemarPoulsen Gold Medal, named after radio pioneer ValdemarPoulsen, was awarded each year for outstanding research in the field of radio techniques...
Oberlin Smith and demonstrated in practice in 1898 by Danish engineer ValdemarPoulsen. Analog magnetic wire recording, and its successor, magnetic tape recording...
magnetization. The first crude magnetic recorder was invented in 1898 by ValdemarPoulsen. The first magnetic recorder to be made commercially available anywhere...
Jay Wright Forrester (July 14, 1918 – November 16, 2016) was an American computer engineer, management theorist and systems scientist. He spent his entire...
Electrical World as "Some possible forms of phonograph". By 1898, ValdemarPoulsen had demonstrated a magnetic recorder and proposed magnetic tape. Fritz...
Hidetsugu Yagi (八木 秀次, Yagi Hidetsugu, January 28, 1886 – January 19, 1976) was a Japanese electrical engineer from Osaka, Japan. When working at Tohoku...
and actress ValdemarPoulsen (1869–1942), Danish engineer Polson (surname) Poulson (surname) This page lists people with the surname Poulsen. If an internal...
from the American Institute of Electrical Engineers, now IEEE, (1944) ValdemarPoulsen Gold Medal from the Danish Academy of Technical Sciences [da] (1947)...
Early experiments in AM radio transmission, conducted by Fessenden, ValdemarPoulsen, Ernst Ruhmer, Quirino Majorana, Charles Herrold, and Lee de Forest...
waves over a distance of five kilometers. 1898 The Danish physicist ValdemarPoulsen creates the world's first magnetic recording and reproduction, using...
190315599, Poulsen, Valdemar, "Improvements relating to the Production of Alternating Electric Currents", issued 14 July 1904 US 789449, Poulsen, Valdemar, "Method...
Franklin Leonard Pope Telegraphy, electric lighting, Edison influence ValdemarPoulsen Magnetic recording Michael I. Pupin Long-distance telephone communication;...
the arc converter transmitter, which had been initially developed by ValdemarPoulsen in 1903. Arc transmitters worked by producing a pulsating electrical...
(Paris Exposition of 1900) magnetic recorder was invented by ValdemarPoulsen in 1898. Poulsen's device recorded a signal on a wire wrapped around a drum...
20th century in Germany, based on magnetic wire recording invented by ValdemarPoulsen in 1898. In 1951, the UNIVAC I was released, using magnetic tape to...
transmission occupies a wide bandwidth) is attributed to Reginald Fessenden, ValdemarPoulsen and Lee de Forest. The most common type of receiver before vacuum tubes...
continuous wave were the arc converter (Poulsen arc) transmitter, invented by Danish engineer ValdemarPoulsen in 1903, and the Alexanderson alternator...
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