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Contents de Radiofil magazine 84
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Ivory sheets :
Le Synchrône Tout pour TSF by Serge Logez.

Life of the club :
La gestion informatisée de la boutique tubes by Victor Cordoba.
Cette gestion a été développée en base de données en MS ACCESS.

Restoration :
Le poste américain Bosch 853-855 de 1938 by Jean Cudraz.
This radio is housed in an elegant varnished wooden cabinet 52cm high, 38cm wide and 26cm deep. It is distinguished by its tuning via a variable capacitor driven by a small motor which is controlled through a series of contacts and the selection of 14 frequencies preset by means of a system of electromechanical cams.

Realization :
Les nouvelles technologies au secours de la TSF by Alain Leconte.
The desertion of broadcasting from the short wave and long wave bands has forced us to use our ingeniosity in order to keep our vintage wireless sets in good voice. The numerous short wave or long wave micro-transmitters we have devised are testament to this. Equally superb is the initiative by supporters of Radiofil who have developed an FM receiver module where station tuning is achieved through adjustment of the original variable capacitor. At SHTSF (a radio club in Le Havre), we have explored another avenue, the possibility of transmitting the audio signal via a Bluetooth link. It was Jose who guided us as to what material to order, the Audio XS3868-2 Bluetooth module.

Measurement :
Le test des tubes européens sur Metrix U61 by Daniel Maignan.
The U61 valve tester was put on the market by Metrix in the 50’s (the U61B in 1958). In 1967, it cost 3100 Francs complete with 4 adapters, the famous « camemberts ». At the time, « European base » valves were for the most part long since obsolete, although the Gaudillat guide of 1963 still mentioned the E and F series (E415 to E499 and F460 to F704). There was also the ACH1, the AF3 and the AK1. The two adapters described below enabled the use of this set to quickly test these pre-war valves.

Trick :
Trucs et astuces by Alain Fargeix, .

In the course of Web :
Réparation des cadres en ferrite

Tubes (ou lampes) :
Les lampes de TSF by Pierre Hémardinquer.
Several articles which have appeared in the magazine have kept our readers up to date on the significant evolution we have seen in the fabrication of Wireless valves. As we know, there no longer exist generic valves, useable equally in high frequency or medium frequency amplification, detection, and even the first stages of low frequency amplification. High consumption tungsten filament valves from « the heroic age of Wireless », then the first « micros » with thoriated filaments have made way to modern oxide-coated filament vacuum tubes, or to the most recent indirectly heated versions with cathode emitter heated by a separate element.

Report :
Le musée des communications en Champagne by Raphaël Girardin.
L’épopée du monde de la communication n’attend plus que vous !
Imagine the complete history of military and civil communication, from 1800 to present day, housed in a 300m2 building ….. well, in Champagne you can actually view such collections, which have come from all over the world. This museum is the outcome of a long period of work by Guy Millot, an enthusiast since his youth.

Atelier :
Modification du lampemètre Metrix 310 by Jean-Pierre Tonnelier.
Ajout de l’option de sortie de l’affichage : galvanomètre ou multimètre.
Since I had a quantity of valves to check out for Radiofil, I wanted to protect my valve tester from the horrors of short circuit valves which could twist or break the needle of the galvanometer. To do this, I was guided by the study by my friend Jean-Paul Delattre which appeared in issue 34 of the magazine.
Une 5Y3 peut en cacher une autre by Denis Vernizeau.
Whilst working on an AC receiver, I noticed a low level hum, different from the usual 100Hz ripple typical of this type of full wave rectified set. In short, it sounded like what you’d expect from an AC/DC set with half wave rectifier.

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