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Contents of the magazine
Sommaire général
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Contents de Radiofil magazine 74
<< Previous May-June 2016 Next >>
Couverture magazine

Ivory sheets :
Récepteur Sadir R87

Letters of radiofillists :
Le courrier des radiofilistes
À propos de l'arrêt des émetteurs grandes ondes

Realization :
L’Électronicofil s’initie à la réception des GO by Gérard Prieur.
Un récepteur grandes ondes à amplification directe
In this article we will look at the reception of the Long Waves (LW), the range of the Medium Waves (MW) is depleting regularly in Europe. We opt for a Tuned Radio Frequency receiver (TRF) which is implementing the tubes of the octal serie.
Une triode à flamme by Vincent Delamare.
The description which follows is certainly not a discovery, but is nevertheless an interesting idea. It consists of three acts : a bit of history, the birth of a prototype and, lastly, the final construction.

In the course of Web :
Les premiers postes à transistors sur le marché français en 1957
As most of you know, the Radiofil forum which is available to all vintage radio and audio enthusiasts, is a hub of good natured discussion and exchange and therefore always an invaluable source of information, with regular participation from other countries. We select subjects which we believe will be of great interest to our readers and publish them in the magazine, with particular consideration for those who don’t have Internet. In this edition, forum participants discuss the first transistor radios commercialised in France. A great topic led by enthusiasts who introduce us to magnificent sets. We have only been able to present a portion of the dialogue here such is the vastness of the subject. For those who are really interested, the link at the end will enable you to access the discussion in its entirety.

FM :
La modulation de fréquence by Daniel Maignan.
Des tubes aux puces, soixante années d’évolution
Before embarking on the more practical aspect of this series, which we hope will inspire you to build some equipment related to Frequency Modulation, let’s look again at the active components used in our FM tuners. We make a list (not necessarily exhaustive) of components, sometimes specific and some of which we have already come across on a circuit diagram in the preceding chapters.

History of men :
Le 230e anniversaire de la Loi de Coulomb by Michel Receveur.
The officer, engineer and physicist Charles Augustin de Coulomb was born in Angouleme on the 14th of June 1736, in the middle of the Age of Enlight­enment, that of the great Savants : d’Alembert and his Principle (1743), Franklin and his lightning rod (1752), Diderot and his Encyclopaedia (1747-1766), the great mathematician Lagrange and the chemist Lavoisier. Physicists and engineers were inspired by the Discourse on the Method (1637) of René Descartes and by the calculation of Probabilities of Blaise Pascal. Henri, Coulomb’s father, was inspector of the Royal Estates and originated from Montpellier.

The HAM page :
Un récepteur OC pour débutants by Mourot Bernard.
We present here a radioamateur receiver covering 5 bands, by means of plug-in coils; the various transistor stages can be used separately for other functions. Construction requires some attention but the results are very impressive for the few components used.

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