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Contents du Bulletin de l'AEA série normale 110
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Ivory sheets :
Sonora F (super 7)

History of men :
Joseph Béthenod 1883-1944 by J.-C. Montagné.
J. Béthenod was born in Lyon, april 28, 1883 where he was graduated as engineer from the école Centrale. During his military service he was posted at the Eiffel-Tower and he made acquaintance with P. Brenot and E. Girardeau. After many experimentations he realized with the Société Alsacienne de Constructions Mécaniques, his first alternating current generator (800 Hz ; 22 kW) which was used for the Eiffel-Tower transmitter. In 1915 he designed a high frequency alternator, realized by S.A.C.M. and used at the Lyon La Doua station. Later, Bethenod was consulting engineer at many compagnies. He was Officier de la Légion d'Honneur and member of the Académie des Sciences.

Report :
Une rapide visite au musée de la reproduction du son à Saint-Fargeau (Yonne). by J.-C. Montagné.
The département of Yonne is one part of the Bourgogne well known for its wines. But there are others peculiarities, particularly the museum of Saint-Fargeau which assemble a beautiful of mechanical music instruments, a marvellous collector of phonographs since the origin and a wonderful exhibition of old wireless sets.
Comment on vient à la radio by Jean-Pierre Hamon.
Mechanic by trade, our colleague J.-P. Hamon tells us how he became a radio enthusiast and collector after he was really bewitched by an old set given by a friend of him.

The HAM page :
Le radioamateur et la collection radio by J. Revidon.
If radio Ham still exists, it is not so usual to meet with radio Ham collectors. Nevertheless they exist and the aim of this column is to publish their testimonies, their pictures of old transmitters and receivers, their memories.

Theory and practice :
Lampes de collection by B. Machard.
Our colleague B. Machard who wrote books about tubes communicate datas of tubes not commonly presents in the collections.
Réglage des récepteurs FM : le bon emploi du vobuloscope. by R. Houzé.
The adjustment of radio detector in the frequency modulation receivers outfitted with tubes is a tricky operation. The best way to do it is to make use of a Wobbulator and an oscilloscope or of a Wobbuloscope. But to avoid desappointments, the mode of operation needs the knowledge of circuit behaviour and application of the clear explanation hereafter given by Mr. Roger christian Houzé, retired professor.

Atelier :
Amplis d'antenne by J.-C. Montagné.
When the collector's home is like a Faraday cage and that it is forbidden to set up an external wire, our old receivers are in a poor condition of reception, in particular the crystal receivers. Here is described an amplifier for use with a short antenna hidden in a window recess. The low impedance out put is to be connected with a TV coaxial cable to the antenna input of the receiver. The power supply can be batteries instead of main power.
Philips 834A/835L : remplacement du potentiomètre bobiné fractionné avec inter by R. Asensi.
Old Philips receivers 834A/835L a.s.o. require often a new potentiometer network. The specials items designed by Philips at the time are no more available. Hereafter is described the mean to sustitute with existing resistors.

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