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Contents of the magazine
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Contents de Radiofil magazine 80
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Ivory sheets :
Emerson 321

Restoration :
Le récepteur de trafic Metox REC8543 STPP by Jean-Paul Delattre.
A while ago I obtained this Metox receiver (ser. no 4006) which otherwise one could find on the surplus market, and I decided to bring this venerable set back to life. Allegedly this set enabled it’s first owner to receive signals from the famous German battleship, the Bismark (figure 1), while it was berthed at Brest. This sounds impossible because if the receiver dates from 1943 then it couldn’t have received a transmission from a ship which sank in 1941. Besides, the Bismarck had never been to Brest, only other ships like the Prinz Eugen or the Gneseinau have been stationed there but this was neither during 1943 nor after. A second possibility is that the Metox receiver was made before 1941 and the Bismark was then en route to Brest for repairs and reprovisioning just before it was sunk some 650km to the West.

Let us speak about technique :
L'Électronicifil se met aux semi-conducteurs by Gérard Prieur.
2e partie
When experimenting with valves, even « modern » ones, one is often faced with problems which are difficult to solve by staying within the physics of the vacuum. In many cases, the use of semi-conductors born from solid state physics can greatly help the designer. This article is here to give you some ideas or to convince you of the simplifications obtained.

Realization :
Un récepteur FM à superréaction à un seul tube by Daniel Maignan.
This economic design demonstrates the astonishing possibilities of superregenerative reception, a bit forgotten these days. Although this process does not achieve the performance of more complex frequency changers, it’s still true that the results obtained, in terms of sensitivity with a well designed and constructed set, are absolutely remarkable. To receive FM, the transformation of variations in frequency resulting from the modulation to variation in amplitude are produced by operating on the side of the response curve of the circuit ; however with superregeneration, FM reception is subject to distortion and background noise. As a result, this design is of experimental interest for FM, but could serve for listening to air traffic on AM.

History of men :
Les grands raids aériens : la Croix du Sud
Before the disappearance of flight AF447 between Rio de Janeiro and Paris in 2009 which shook the world, there had already been, 81 years before, that of Jean Mermoz who, aboard his aeroplane La Croix du Sud, had drowned whilst also crossing the Atlantic, headed towards Brazil.

History of techniques :
Le DKE 38, radio de Telefunken by Wladimir Astratoff.
On 11th March 1933 Joseph Goebbels was named Propaganda Minister in Germany and found himself charged with controlling and deploying propaganda. A few months after his appointment he claimed : « Radio is a means of propaganda comparable to the invention of printing ». In order to provide a radio set at an affordable price, he gathered together the radio manufacturers and explained his demands. This resulted in the launch of the VE 301 (figure 1), Volksempfänger (people’s receiver), the « 301 » signifying the seizing of power by the Nazi regime on 30th January 1933. The set costs 76 Marks, half the going price on the market.
Le détecteur Chantecler by Serge Huart.
This is a rare object. It’s neither the apple of Steve Jobs, nor of Chantecler, this Toulon speciality, nor is it the cock of Roman de Renart, and even less that of Edmond Rostand’s play. It is in fact a crystal detector…
Étude fonctionnelle du poste à galène by B. Gordon.
It was generally accepted that a crystal set was a toy which could be put in the hands of a 10-15 year old child. After a week of trials, more or less unsuccessful, the crystal set would be put aside and said child could carry on with stamp collecting. Our readers often ask us to get back to basics and to publish articles more easily understood by all. In response, we have dug out from the archives this 1950’s article about crystal sets which puts the emphasis on the criteria to take into account for an installation capable of giving good reception on a crystal set.

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