Cremlingen-Abbenrode transmitter

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Cremlingen-Abbenrode transmitter
Image of the object
Basic data
Country: Lower Saxony
Country: Germany
Altitude : 100  m above sea level NHN
Coordinates: 52 ° 17 ′ 36.2 ″  N , 10 ° 43 ′ 12 ″  E
Use: Broadcasting station
Accessibility: Transmission system not accessible to the public
Owner : German radio tower
Demolition : 29th January 2018
Data on the transmission system
Tower / mast 1
Height: 137 m
Construction time: 1962
Operating time: 1962-2013


Tower / mast 2
Height: 188 m
Construction time: 1964
Operating time: 1964-2015


Tower / mast 3
Height: 99 m
Construction time: 1964-1965
Operating time: 1965-2015
Waveband : AM station
Radio : MW broadcasting
Position map
Transmitter Cremlingen-Abbenrode (Lower Saxony)
Cremlingen-Abbenrode transmitter
Cremlingen-Abbenrode transmitter
Localization of Lower Saxony in Germany

The cremlingen transmitter was one of the Media Broadcast powered transmitter for medium wave . It was located near Cremlingen-Abbenrode . The facility between the Braunschweig-Ost exits and the Königslutter junction was clearly visible from the Autobahns 2 and 39 .

The transmitter, which existed from 1962, was also mentioned in relevant publications as the medium wave transmitter Braunschweig, medium wave transmitter Königslutter or medium wave transmitter Cremlingen.

Visible from the outside, the system had three self-radiating transmission masts , which were isolated from earth and which were 188 meters, 137 meters and 99 meters high.

The transmitter was shut down on December 31, 2015. The three transmission masts were blown up on January 29, 2018.

history

Height diagram of the transmission masts of the long and medium wave transmitters of the Deutschlandfunk

On September 30, 1962, a 100 kW transmitter on the 755 kHz frequency with the Deutschlandfunk program went into operation here for the first time . A 137-meter radiator served as the antenna. A year later, the transmission power was increased to 200 kilowatts. However, since there was interference with the DLF station Ravensburg (20 kW) at night , Cremlingen was only allowed to transmit on this frequency during the day.

From October 1963, a second medium-wave transmission system could be set up, as the 548 kHz frequency used by AFN Munich had been released. This transmitter was initially operated with 200 kilowatts. The antenna system consisted of a 240-meter-high guyed tubular steel mast and a steel framework mast as a reflector. The signal suppression in the south-easterly direction suppressed co- channel interference with the Soviet station Radio Mayak during the dark .

The second frequency, 755 kHz, could only be used during the day with 200 kW; the Ravensburg transmitter had meanwhile been upgraded to 100 kW transmission power (20 kW at night).

From October 1, 1967, the transmission power for 548 kHz was increased to 800 kilowatts (400 kW at night). The transmission power, which was extremely high at the time, ensured that almost the entire GDR and the northern Federal Republic of Germany were well served by the DLF program .

When the Geneva Wave Plan came into force on November 1, 1978, the powerful 548 kHz daily mean wave had to be abandoned in favor of other DLF transmitter locations.

Both existing transmitter systems were then converted for joint operation at 756 kHz. The directional antenna system was adapted to the higher frequency by shortening the 240-meter mast to 199 m. From that point on, the 137 m antenna mast only served as a reserve antenna.

The large transmitter with 800 kW in omnidirectional radiation was then used for daytime operation; at night the 200 kW transmitter was switched to the directional antenna with fade-out in the southeast direction.

In the mid-1990s, the Germany-wide shutdown of coastal radio stations and the reduction of the offer to medium wave began. The 800 kW tube transmitter has now been replaced by two 100 kW transmitters. In 2005 it was replaced again by a fully transistorized and DRM- capable system TRAM / P 800 from Transradio Sendersysteme Berlin . Since the tube transmitter was dismantled, Cremlingen has never broadcast the DLF program with a transmission power of more than 200 kW.

On December 31, 2015, the broadcasting of Deutschlandfunk ended shortly before midnight.

The facility was blown up and dismantled on January 29, 2018.

Use of the reserve system

From 1978 the 137 m mast was only used as a reserve antenna. From 2001 onwards, Megaradio's program was broadcast on the 630 kHz frequency approved by the NDR . During the day the transmission power was 100 kilowatts, the night output should have been 17 kilowatts. The operation of the station was stopped again in 2003 after Megaradio withdrew.

From April 1, 2005, the " Voice of Russia " was broadcast on this system on the frequency 630 kHz. However, on January 1, 2013, the operator terminated all leases for German MW transmission systems. Due to a technical error, the transmission system in Cremlingen-Abbenrode was not switched off until January 2, 2013 at 1:30 p.m., the other transmission systems were, however, scheduled for December 31, 2012. Since 2014, Voice of Russia has only been supplying Europe via shortwave.

photos

  • Transmission system for 756 kHz, consisting of a 188 meter high tubular mast (in the foreground) and a 99 meter high steel truss mast as a reflector mast (in the background)

  • Transmission system for 630 kHz, consisting of a 137 meter high steel truss mast

See also

Web links

Individual evidence

  1. ↑ Landmark disappeared, transmission masts gone. news38.de from January 29, 2018, accessed on January 29, 2018
  2. ↑ Portrait of the station Königslutter ( Memento from May 12, 2009 in the Internet Archive )
  3. ^ MW station list from 1976
  4. ↑ Transmitter changeover to 548/549 kHz ( memento of September 3, 2011 in the Internet Archive ) in favor of transmitter Thurnau MW 549 kHz 200 kW, today 100 kW - Transmitter Nordkirchen MW 549 kHz 100kW.
  5. ^ Wittsmoor list from 1982. - same at the end of the 1980s
  6. ↑ MW stagnation in the USA and Europe
  7. ↑ Transradio.de: 800kW AM / 400 kW DRM MW-Cremlingen ( Memento from February 19, 2014 in the Internet Archive )
  8. ↑ dxaktuell.de: Russischer Rotstift: Voice of Russia shortens medium wave broadcasts from Germany . - The medium wave transmitters in Wilsdruff and Wachenbrunn were also affected by this regulation .
  9. ↑ dxaktuell.de: Voice of Russia: No more analog shortwave from Moscow for Germany, only 693 kHz remains
  10. ↑ radioeins.de: shutdowns in the voice of Russia completed ( Memento from July 1, 2013 in the web archive archive.today )