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Contents of the magazine
Sommaire général
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Contents du Bulletin de l'AEA série normale 113
<< Previous July-September 2003 Next >>
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Technical pages :
À propos du montage ultra-linéaire : Mea culpa, la mémoire à l'épreuve de… by R. Houzé.
Following the publication of the article "triode or pentode", its author give us hereafter some amendments dealing with the authorship of ultra-linear BF amplification device.

Retro press :
Echos d'antan : de l'académie des Sciences
Prefectionnement de la télégraphie sans fil. Télégraphie sans fil en aérostat.

Military radio :
Transmissions militaires 1935-1945 by E. Codechevre.
Les transmissions françaises
This paper, the first part of a series, recalls shortly the political and economical context as well as the decisional stuctures defining military equipments. The author proposes some elements of explanation concerning the disparity of radio wireless equipment of different belligents.

History of men :
Au-delà de l'horizon by P. Demerseman, R. Foster.
A few months after Marconi succeeded in a transatlantic wireless communication, Kennelly in the United-States and Heaviside in England published the hypothesis of an ionospheric reflecting layer to explain the propagation of radio waves beyond the skyline. About twenty-two years later, Appleton realized the very first experiments, with the help of an interference method, proving the existence of such a layer and estimating its distance from the ground. Only two years laters, Breit and Tuve, using a pulsed radiowaves method obtained similar data. The scientific careers of these physicists are also briefly reviewed.

History of techniques :
Histoire de loupiotes by J.-C. Montagné.
An entertaining anecdote concerning the two "first appearance" of de Forest's audions in France during summer 1914.

The HAM page :
Pourquoi a-t-on voulu tuer le Morse ? by R. Houzé.
The first part of a review tackling the usefulness, the principles and the popularization of the Morse code.
Histoire des indicatifs radioamateur by A. Ribot.
A brief analysis of the development of the call-signs used by ships, broadcasting stations and radio amateurs since 1913 up to 1968.

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