Transmitter of Allouis

The transmitting Allouis is a transmitting broadcasting located in the commune of Allouis, in the department of the Cher, in France. It is in particular composed of two 350 height meters pylons constituting the most structures currently existing in the country since dismantling of the transmitting Oméga of Chabrier, with the Réunion. The indication of the village of Allouis during several decades on the radios made the reputation of this locality in whole Europe. The Center of Allouis is managed by the Télédiffusion company of France TDF, first European company of remote transmission. In the event of Catastrophe, the official frequency to obtain information is " France Inter " 162 Khz diffused via the transmitter of Allouis.

History

The transmitter of Allouis entered in service in 1939 as a central transmitter of the long waves to France. It was then composed of an antenna of four masts and a transmitter of 500 kw. It was destroyed in 1944 by the German forces at the time of the Second world war.

The transmitter was rebuilt and brought into service the October 19th 1952, with a new transmitter of a power of 250 kw and an antenna a height of 308 Mr. In 1957, the power of transmission was increased to 600 kw, in 1974 to 1.000 kw and 1981 to 2.000 kw (reduced to 1000 kw the night). In 1974, a second mast of 350 m was built and the first existing pylon was raised to 350 Mr.

Between 1939 and 1997, the Station broadcast transmitting of Allouis was also used for the radiophonic diffusion in Short waves. This activity was transferred to Issoudun in 1998 and the antennas were destroyed. With most extremely of this activity, the center short waves had 4 transmitters of 100 kw and a transmitter of 4 kw. The zone of emission was primarily Western and Eastern Europe, as well as the North Africa.

Since 1977, the transmitter of Allouis is also used for the transmission of the time signals starting from a Atomic clock installed in the principal building.

The contract of diffusion established between TDF and Radio France is signed to go until in 2018. The transmitting center could die out on this date, after the installation in France of the numerical diffusion DAB (substitute of MF Frequency modulation). Only a diffusion DRM could save transmitting center TDF of Allouis.

Technique

Allouis emits in long waves on 162 Khz. Broadcasting (France Inter) is transmitted in Amplitude modulation. The time signals are emitted in Phase modulation. Their format of transmission is similar to that of DCF77. The signal comes from Paris by special Phone line. A line of help also comes from Issoudun where the signal of France Inter arrives by the domestic network of the radio-relay systems of TDF.

Allouis has a scientific and legal vocation. The time signals give access the French standard time and to synchronize clocks. Modules of reception are marketed to this end.

See too

Internal bonds

Transmitting of television
List of the highest French structures

External bonds

History of the transmitter of Allouis
transmitting Towers of France-Inter (structurae.de)
'' Langwellensender in Norwegen, Frankreich, Schweden, Großbritannien, Pollen, Dänemark, Finnland '' (a passage contains over the transmitter of Allouis)

Random links: