Ernst F.W. Alexanderson, in full Ernst Frederik Werner Alexanderson, (born Jan. 25, , Uppsala, Swed.—died May 14, , Schenectady, N.Y., U.S.). Ernst Alexanderson ( – ); a Swedish-American electrical engineer, a pioneer of radio and television development; received US patents. The man who developed the high frequency generator that made this possible, and much more, was Dr. Ernst Alexanderson. Ernst Alexanderson. Alexanderson .

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Alexanderson was also instrumental in the development of television. He provided some technical information on the kW radio alternator, the magnetic amplifier, and a multiple antenna which were key elements of his long-wave system. He invented alexanderaon Alexanderson alternatoran early radio transmitter used between and the s for longwave long distance radio transmission.

He spoke of the interdependence of a broad range of technologies, and that the GE Research Lab continue to have this integration to drive development. From to Dr.

Alexanderson, Ernst Frederik Werner (–) |

His second patent for improvement of the AC motor hit a snag when Steinmetz reviewed it and discovered a problem with the design. He was born on January 25,in Uppsala, Sweden.

His studies in the polarization of radio waves made possible effective radio direction finders. In the s he developed a passion for sailing. These account for many of his patents obtained over a period of thirty-five years on an average of roughly a new patent every seven weeks. As the technology historian David Noble writes:. He found the drafting jobs boring, he shopped around for jobs and was frequently trying to get raises. Alexanderson also helped to create the amplidyne, a direct current generator.


Alexanderson continued improving his machine, and the Alexanderson alternator became widely used in high power very low frequency commercial and Naval wireless stations to transmit radiotelegraphy traffic at intercontinental distances, until by the s it was replaced by vacuum tube transmitters.

Ernst F. W. Alexanderson

He also designed a series of high-frequency alternators for radio use. Thank you for your feedback.

In his name was listed on a “Wall of Fame” honoring foreign born citizens who have made notable contributions to American democracy.

In he patented a selective-tuning device for radio receivers, which became an integral part of modern radio systems. Gunn Andrew Bobeck InCharles Proteus Steinmetz delivered a 10 kHz version which proved of limited use and could not be directly used as a radio transmitter.

Alexanderson’s first effort, a 50 kHz alternator, was installed in Fessenden’s radio station in Brant Rock, Massachusetts. In this it has not succeeded Alexanderson’s mother was the former Amelie von Heidenstam. A radio frequency RF generator. All of this time his hearing deteriorated and he had to wear a hearing aid. Alexanderson retired from GE in although he continued as a consultant to the company for several more years.


Alexanderson, consulting engineer of the Radio Corporation of America and the General Electric Company and his assistants. He saw the need for ‘breathing room’ so that an area of technology could mature. Some of the honors and awards he received during his long life are: Another problem was friction with air, moving an object that fast in the air will generate a lot of heat.

Alexanderson was not happy about the split of GE and RCA, this would end support for his radio-television research.

The mechanical power for an electric generator is usually obtained from a…. In Alexanderson became unhappy at the structural changes at GE and separated from the company. Ernst Alexanderson’s enormous contribution to technology was acknowledged more than once.

Alexanderson’s big break came when he was commissioned by Reginald Fessenden, a pioneering wireless operator, to build a generator that could produce alternating, high frequency currents. This project was the first major DC link between two AC systems.