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Contents of the magazine
Sommaire général
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Contents du Bulletin de l'AEA série normale 108
<< Previous October-December 2002 Next >>
Couverture magazine

Technical pages :
Retour sur Henri de France by Jean-Jacques Ledos, Jacques Poinsignon.
In a courteous debate, two of our specialists in the field of television give a corrective opinion upon our last publication dealing with the work of Henri de France.
La raison du choix des nombres (405, 441, 525, 625, 819, etc.) by C. Moons.
comme base des différents standards
This is a reprint of an article published in 1951. Despite it is not in accordance with many of present time standards, the argument is always valid and can help someone for understanding the process of TV scanning calculation.

History of men :
Le major Armstrong by R. Foster, P. Demerseman.
E. H. Armstrong was born Dec. 18, 1890 in New York City. After graduation from Columbia University, he was appointed Assistant of his favourite professor M. Pupin. In Oct. 1913 he filed the first of his fifty two patents : the regenerative circuit which strongly impoved the performances of the audion. During WW I he was commissioned as an officer and posted to the U.S. Army Signal Corps Reseach Laboratory in Paris where he markedly contributed to the invention of the superheterodyne. He received the Légion d'Honneur in 1919 and then, back at his lab at Columbia, invented super-regeration. Six years later he made his most prominent discovery, the frequency modulation widely utilized in broadcasting, radar space communications.

Report :
Visite à Nançay

Theory and practice :
Le Gnomo, un mini poste géométrique variable by D. Falgoux.
A compact two-tube italian receiver born in 1954, is described and the three schematics used are analysed.

Atelier :
Les codes de couleurs de câblage
Codification des potentiomètres by R. Fürst.
Les codes utilisés par les constructeurs de lampes

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