The Sender Inselsberg is a FM

FM broadcasting

FM broadcasting is a broadcasting technology pioneered by Edwin Howard Armstrong which uses frequency modulation to provide high-fidelity sound over broadcast radio. The term "FM band" describes the "frequency band in which FM is used for broadcasting"...

 and television

Television

Television is a telecommunication medium for transmitting and receiving moving images that can be monochrome or colored, with accompanying sound...

-transmission facility on the Big Inselsberg in Thuringia

Thuringia

The Free State of Thuringia is a state of Germany, located in the central part of the country.It has an area of and 2.29 million inhabitants, making it the sixth smallest by area and the fifth smallest by population of Germany's sixteen states....

, Germany

Germany

Germany , officially the Federal Republic of Germany , is a federal parliamentary republic in Europe. The country consists of 16 states while the capital and largest city is Berlin. Germany covers an area of 357,021 km2 and has a largely temperate seasonal climate...

. It has two aerial

Antenna (radio)

An antenna is an electrical device which converts electric currents into radio waves, and vice versa. It is usually used with a radio transmitter or radio receiver...

 tower

Tower

A tower is a tall structure, usually taller than it is wide, often by a significant margin. Towers are distinguished from masts by their lack of guy-wires....

s, which were built in 1939 and 1974.

The transmission tower built in 1939 is a 43.31 metre high free-standing cylindrical tower built of steel concrete

Concrete

Concrete is a composite construction material, composed of cement and other cementitious materials such as fly ash and slag cement, aggregate , water and chemical admixtures.The word concrete comes from the Latin word...

, which carried until the beginning of the nineties similar to Gerbrandy Tower

Gerbrandy Tower

The Gerbrandy Tower is a tower which was built in 1961 in the Netherlands.-Description:It is situated in IJsselstein. The Gerbrandy Tower is used for directional radio services and for FM- and TV-broadcasting. The Gerbrandy Tower consists of a concrete tower with a height of 100 meters on which a...

 a guyed

Guy-wire

A guy-wire or guy-rope, also known as simply a guy, is a tensioned cable designed to add stability to structures . One end of the cable is attached to the structure, and the other is anchored to the ground at a distance from the structure's base...

 steel tube mast on its top. This mast carried the FM- and TV-broadcasting aerials.

Nowadays this mast is demounted and there are only small aerials for mobile phone services on its top. The tower is nicknamed because of its cylindrical form "thermos flask".

The transmission tower built in 1974 is a 126 metre tall free standing steel tube tower on three feet. This tower which is similar to the tower of transmitter Brocken, which was built at the same time, carries above its legs three platforms for aerials for directional radio services and in its topmost section, protected by layers of glass-reinforced plastic

Glass-reinforced plastic

Fiberglass , is a fiber reinforced polymer made of a plastic matrix reinforced by fine fibers of glass. It is also known as GFK ....

, transmission aerials for FM broadcasting services and TV.

Analogue television

• ARD
  ARD (broadcaster)
  ARD is a joint organization of Germany's regional public-service broadcasters...
  
    (originally DFF1
  Broadcasting in East Germany
  Rundfunk der DDR was the radio broadcasting organisation for the German Democratic Republic from 1952 until German reunification...
  
  ), VHF channel E5 (Horizontal) 100 kW
• MDR 3rd Programme
  Mitteldeutscher Rundfunk
  Mitteldeutscher Rundfunk is the public broadcaster for the federal states of Thuringia, Saxony and Saxony-Anhalt...
  
    (originally DFF2
  Broadcasting in East Germany
  Rundfunk der DDR was the radio broadcasting organisation for the German Democratic Republic from 1952 until German reunification...
  
  ), UHF channel 31 (Horizontal) 500 kW

FM radio

• MDR 1
  Mitteldeutscher Rundfunk
  Mitteldeutscher Rundfunk is the public broadcaster for the federal states of Thuringia, Saxony and Saxony-Anhalt...
  
  , 92.5 MHz
• MDR 2
  Mitteldeutscher Rundfunk
  Mitteldeutscher Rundfunk is the public broadcaster for the federal states of Thuringia, Saxony and Saxony-Anhalt...
  
  , 90.2 MHz
• MDR 3
  Mitteldeutscher Rundfunk
  Mitteldeutscher Rundfunk is the public broadcaster for the federal states of Thuringia, Saxony and Saxony-Anhalt...
  
  , 87.9 MHz

External links

• http://www.skyscraperpage.com/diagrams/?b46970
• http://www.skyscraperpage.com/cities/?buildingID=46971