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Contents de Radiofil magazine 46
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Ivory sheets :
Récepteur mobile Radio Sigma by D. Maignan.

Restoration :
Restauration d'un poste Ancel by J-R. Malderez.
Love at first sight as soon as I saw this receiver on my computer at the approach of the spring 2010, when consulting announcements of a well known site of auctions. A few days later, I got my first Ancel vintage radio.
Repair and restoration of a Lemouzy 514 by F. Maton.
This radio set is a superheterodyne with an intermediate frequency of 455 kHz. It can receive the 3 following wave ranges: · Long waves: 1000 to 2000 meters (150 to 300 kHz) · Medium waves: 185 to 577 meters (520 to 1620 kHz) · Short waves: 16.5 to 51 meters (5.9 to 18.2 MHz) It works on alternative mains: 110 V-125 V-145 V-220 V-245 V 50 Hz with a consumption of 53 W.

Realization :
Un récepteur à ondes courtes by D. Maignan.
2e partie
This superheterodyne receives the short waves from 3.9 to 14.5 MHz. The three RF coils are pluggable, thus allowing to change easily the frequency range. All the wiring should be soldered with care and RF short length connections should be done whenever necessary.
Une bobineuse by A. Dellerm.
To repair our old radio sets, we have often to know some theorical radio basis, get in our lab a multimeter, and if possible, a tube meter and eventually also an oscilloscope. It’s a deal to find the breakdown, but to solve it can be annoying if you don’t get really any spare parts, especially those which are specific. Thus, I suggest you in this article to build this coil winder which will be very useful for you if you have to rewind a power transformer.
Une antenne active by J-J. Goupy.
Why did I build this active antenna? Recently, I was confronted with a problem of bad reception in apartment, what gave me the idea to realize an active antenna.

Trick :
Tuyaux tours de main
Vérification de l’oscillatrice dans un superhétérodyne Fabriquez le bloc d’accord pour votre détectrice à réaction Les pannes des condensateurs

In the course of Web :
Au fil du forum by D. Maignan.
As everybody already knows, the Radiofil forum initiated by Radiofil for all the amateurs of early radio and audio techniques, is a great place of courteous chats where participants from all countries are exchanging information about their common hobby which are always interesting. We are choosing and reproducing some files that are supposed to be of great interest to our readers, especially for those not ready to use the web yet. In this issue, we are reporting a chat about the domestic interferences which perturb more and more the reception on long and medium waves, with the means to find out their origin and to cure them. The second part gives a simple way to build a circular radio dial from an old CD.
Au fil du forum by D. Maignan.
Les petites ondes
As everybody already knows, the Radiofil forum initiated by Radiofil for all the amateurs of early radio and audio techniques, is a great place of courteous chats where participants from all countries are exchanging information about their common hobby which are always interesting. We are choosing and reproducing some files that are supposed to be of great interest to our readers, especially for those not ready to use the web yet. In this issue, we are reporting a chat about the domestic interferences which perturb more and more the reception on long and medium waves, with the means to find out their origin and to cure them. The second part gives a simple way to build a circular radio dial from an old CD.

History of techniques :
La TSF by J-C. Montagné.
1re partie
Some people will say: we know, it is not necessary to return there. It’s what they believe, let’s respect this opinion. Others, who have not been thinking about it up to now, will say on the contrary: it’s true, I use my mobile phone every day, it operates with RADIO. At office and at home, I have an internet box connected by WiFi to a mobile phone and to my computer, the liaison also works with radio.
Un radioconducteur by H. Brien.
A few years ago, I found a Ruhmkorff coil in a stock exchange. Back home, I tried it and noticed at once that it produced a nice spark. I then planned to reproduce the Branly’s experiment. But this project was postponed until I had to prepare, with several friends of Radiofil, the exhibition for the remembrance of the 90 years of the Lafayette radio station, on last February 27th, 2011.

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