The Roumoules transmitter is the main

broadcasting Broadcasting is the distribution (business), distribution of sound, audio or video content to a dispersed audience via any electronic medium (communication), mass communications medium, but typically one using the electromagnetic spectrum (radio ...

facility for

longwave In radio, longwave, long wave or long-wave, and commonly abbreviated LW, refers to parts of the radio spectrum with wavelengths longer than what was originally called the medium-wave broadcasting band. The term is historic, dating from the e ...

and

mediumwave Medium wave (MW) is the part of the medium frequency (MF) radio band used mainly for AM radio broadcasting. The spectrum provides about 120 channels with more limited sound quality than FM stations on the FM broadcast band. During the daytime ...

broadcasting of

Radio Monte Carlo Radio Monte Carlo (RMC) is the name of radio stations owned and managed by several different entities: * RMC (France) is a French-speaking station, broadcasting in France and Monaco owned by NextRadioTV. **RMC Sport, a French bouquet of paid T ...

near Roumoules, France and is owned by

Monaco Media Diffusion Monaco Media Diffusion (MMD) is a joint-stock company established in 1994. MMD is the only licensee for broadcasting radio and television in Monaco. The national company operates transmitters and distributes licenses and frequencies in consultatio ...

. The 1000 and 2000kW transmitters installed are among the most powerful in the world and can be received well at nighttime throughout Europe.

Longwave transmitter

The longwave transmitter at Roumoules, which was inaugurated in 1974, transmits at 216 kHz (until 1988: 218 kHz) with a transmission power of 1400 kW (until 1976: 2000 kW). It consists of two 1000 kW transmitters switched in parallel, which are however run with 700 kW output power. A third 1000 kW unit has been available since 1983. Although this unit is only used as backup unit, it is possible to switch all three units in parallel, which would allow an operation with a transmission power of 3000 kW. Since 31 March 2020 the transmitter has ceased transmitting the French programme of Radio Monte Carlo but remains available for contract use. The longwave transmitter uses a directional aerial with a maximum strength pointing northwest (azimuth: 309°). It consists of three -high guyed masts, which are insulated against ground and ground-fed. As a backup a -high guyed, ground-fed lattice steel

mast radiator Mast, MAST or MASt may refer to: Engineering * Mast (sailing), a vertical spar on a sailing ship * Flagmast, a pole for flying a flag * Guyed mast, a structure supported by guy-wires * Mooring mast, a structure for docking an airship * Radio mas ...

is available on the site, which only allows an omnidirectional radiation pattern. The grounding system of the long wave transmitter is very large. The total length of all wires of the grounding system is , covering an area of . Because the area around the mast is used for agriculture, the ground wires are laid to a depth of .

Medium wave transmitter

In 1987 a switchable directional antenna consisting of five ground-fed guyed masts was built nearby for the 1467 kHz medium wave frequency, which was previously transmitted from a transmitter at La Madonne. This antenna allows a switchable directional radiation in the following directions: Changing the signal direction takes only 5 seconds. There are no matching network buildings at the bottom of the masts used for medium wave transmission – the devices for tuning the masts to the transmission line are placed in the open air, similar to those in the longwave antenna system. The medium wave Roumoules transmitter has an output power of 1000 kW. It is also used for transmitting the religious programmes of

Trans World Radio Trans World Radio (TWR) is a multinational evangelical Christian media distributor. The largest Christian media organization in the world, it uses mediumwave or high-powered AM and shortwave transmitters, local FM radio stations, cable, satellite ...

. In comparison to the longwave transmitter, which can be received well both at day and night in Southern France, Northern Italy, Switzerland and Southern Germany, this transmitter cannot be normally received well more than from

Roumoules Roumoules (; oc, Romolas) is a commune in the Alpes-de-Haute-Provence department in southeastern France. Population See also * Roumoules radio transmitter *Communes of the Alpes-de-Haute-Provence department The following is a list of th ...

. However at night its transmissions may have at least the same range as those of the longwave system due to its skywave propagation.

Power supply

The Roumoules Transmitter consumes significant amounts of power, supplied by two transformers each capable of providing 5000 kW. The power is delivered to the transformers by a 150 kV and a 220 kV power line. The transmitter's power supply is larger than required (an equivalent supply would provide a community of 5000 with its own substation to the 150 kV grid supply). This redundant supply ensures reliable power for the transmitter. There is a backup generating set of on the site and a possibility to supply the station at reduced power from the local 20 kV grid.

External links

* * * * http://www.skyscraperpage.com/diagrams/?b45468 * http://www.skyscraperpage.com/diagrams/?b45469 * http://www.skyscraperpage.com/diagrams/?b45470 * http://perso.orange.fr/monte-carlo-radiodiffusion/anglais/indexan.htm * http://perso.orange.fr/tvignaud/galerie/am/04roumoules.htm * http://mcstory.free.fr/antennes.html {{DEFAULTSORT:Roumoules Radio Transmitter Radio masts and towers in Europe Buildings and structures in Alpes-de-Haute-Provence Transmitter sites in France