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Contents of the magazine
Sommaire général
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Contents de Radiofil magazine 71
<< Previous November-December 2015 Next >>
Couverture magazine

Ivory sheets :
Grillet Savoia à deux gammes d'ondes 1934 env.

Letters of radiofillists :
Courrier des radiofilistes

In the world :
Le musée d'Olen en Belgique by Eduard Hontele.

Restoration :
Le poste Grillet 7 lampes by Jean Cudraz.
It is following the request from a Swiss collector, Gabriel Rouiller (RFL 1602), that I became interested in this set. G. Rouiller had drawn out the circuit diagram and found an unusual configuration around the mixer valve. Following that he asked me to check it, since I had a couple of these sets in my possession.
Restauration d'un poste Phrynis by Dominique Olivie.
Racontée à la manière d’un roman-photos, voici l'histoire d'un ancêtre abandonné : le poste Phrynis 501 de 1936.

Realization :
Amplifil by Daniel Adiro.
The will of a lot of radiofilistes to build a high performance audio amplifier (see Radiofil magazine n° 67), while staying affordable for the amateur but not breaking principles guaranteeing an excellent sound return, led the team to think about a project where the compromises are seriously evaluated...

In the course of Web :
Les disques stéréophoniques
In this edition, forum participants give updates on their experiments with stereo using two AM transmitters, we also discover a lot of interesting facts about the cutting of 78rpm records and stereo microgrooves, a subject triggered by the articles on FM stereo it seems.

History of techniques :
La stéréophonie by Daniel Maignan.
3e partie
From 1962 the process was finalized with RTF adopting the Zenith-Ge system. The focus was then on the development and commercialisation of large quantities of stereo adapters, then of radios equipped for reception. To connect an adapter to an FM set, it obviously had to have a multiplex output.

The HAM page :
Un hacheur by Victor Cordoba.
During communication between radioamateurs using narrow-band FM, whilst one participant is sharing his knowledge of a specific subject, it is not possible for others to break in with a question or comment, they must wait until he has finished and passed the microphone. With this little circuit comprising only twenty components, radio communication is made easier, transmit time is better utilized and therefore more ideas can be expressed in less time.

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