DocumentCode :
296282
Title :
The Alexanderson alternator, a “near perfect” system of W/T transmission
Author :
Weedon, K.
fYear :
1995
fDate :
5-7 Sep 1995
Firstpage :
69
Lastpage :
70
Abstract :
In 1903, Steinmetz built a 1 kW 10 kHz alternator which was used by Fessenden in experiments with wireless telephony, and in 1904 he placed an order with the General Electric Company (USA) to design and build an alternator capable of operating at a frequency of 100 kHz. General Electric handed the order to Alexanderson to design. Alexanderson tested special Swedish iron strips 1.5 mills thick in strong magnetic fields, and found the iron capable of satisfactory operation at 100 kHz, so he designed the alternator with an iron core. However Fessenden rejected the design and insisted on the use of a wooden core as he was sure that iron would melt in a strong magnetic field at 100 kHz. By 1915 a 50 kW, 50 kHz experimental alternator was being tested and Dr. Alexanderson was able to modulate it with voice, using a Deforest Audion valve to control a magnetic amplifier
fLanguage :
English
Publisher :
iet
Conference_Titel :
100 Years of Radio., Proceedings of the 1995 International Conference on
Conference_Location :
London
ISSN :
0537-9989
Print_ISBN :
0-85296-649-0
Type :
conf
DOI :
10.1049/cp:19950792
Filename :
491794
Link To Document :
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