The Development of Television and Radio Station Online

The development work at General Electric was led by Ernst Alexanderson. Then, as in earlier times, communication via letters between the different departments within General Electric was usual. In the collection of preserved documentation, which Alexanderson donated to the university library in his home town of Schenectady, there exist parts of the discussions about how to proceed with the development of the new technology. Alexanderson and his co-workers examined new designs, and after tests at the laboratory, a completed television receiver was developed for home use.

 

NIPKOW DISCS VERSUS MIRROR DRUMS.

The apparatus that was used at this time is entirely different from transmitters and receivers of today. The transmitters and receivers gradually came to have a number of components of pretty much the same kind, such as a strong light source, a lens system, a rotary perforated disk or mirror drum, microphone, amplifiers for sound and picture signal and an antenna system on the transmitting side. On the receiving side, the picture signals were …

First Alternator for Online Radio News

Until 1904, Alexanderson’s engineering work was mainly aimed at different generator and motor designs. The real challenge came with Reginald Aubrey Fessenden’s order in 1904 to General Elec- tric for an AC generator for 100 kHz, with a requirement for an output power in the kilowatts. Fessenden was a native-born Canadian and had been employed by Thomas A. Edison and at the Westinghouse Company in Pittsburgh. In 1893 he became professor at Western University in Pittsburgh, where he experimented with “Hertzian waves.”

The Weather Bureau of the United States Agriculture Ministry employed him in 1900 in order to examine the possibilities of wireless to spread weather information. Fessenden thought that it should happen through direct speech transfer. In other words not by wireless Morse telegraph, according to the Marconi’s system, but by a continuous carrier wave, which the human voice would modulate via a microphone. He tested this in 1901, and at that time used a microphone from a telephone. The experiment was repeated in 1902 …

Ernst Fredrik Werner Alexanderson

The traditional way to describe technical developments of local radio stations online and their influence on society has followed the most obvious course – a chronological description of those inventions and designs as they become recognized as innovations and are further developed.

Further, this process has often been done in connection with company anniversaries, where naturally the company’s own performance is to the front and where the contributions of individual persons are in the shadow of praise for the company management.

More recently, efforts have been made to remedy this one-sided account, characteristic of Swedish company monographs, and these have tried to reflect the company’s success as a consequence of organizational, technical and economic factors. Examples are LM Ericsson and ASEA – big monographs commemorating the respective company’s 100 year anniversaries. It is interesting also to study how individual inventions have given rise to so-called “genius industries,” for example Alfa-Laval, which was also blessed with a monograph in connection with its 100-year jubilee in 1983.

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