Sender Wilsdruff
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Sender Wilsdruff
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| Basic data | |||||||||
| Country: | Saxony | ||||||||
| Country: | Germany | ||||||||
| Altitude : | 315 m above sea level NHN | ||||||||
| Coordinates: 51 ° 3 ′ 31.1 ″ N , 13 ° 30 ′ 26.9 ″ E | |||||||||
| Use: | Broadcasting station | ||||||||
| Accessibility: | Transmission mast not open to the public | ||||||||
| Mast data | |||||||||
| Construction time : | 1952-1953 | ||||||||
| Building material : | steel | ||||||||
| Operating time: | 1954-2013 | ||||||||
| Total height : | 153 m | ||||||||
| Total mass : | 110 t | ||||||||
| Enclosed space : | 336.5 m³ | ||||||||
| Data on the transmission system | |||||||||
| Waveband : | AM station | ||||||||
| Radio : | MW broadcasting | ||||||||
| Shutdown : | April 30, 2013 | ||||||||
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The transmitter Wilsdruff is a radio transmitter for medium wave that was in operation from 1954 to 2013 near the small town of Wilsdruff near Dresden . The complex is considered to be one of the last surviving transmission systems of its kind in Germany. a. the enclosure, the residential and social buildings as well as the transmitter mast on the Saxon list of monuments (No. 08964292).
description
A 153-meter-high, self-radiating tubular mast, insulated from earth , serves as the antenna . The length of the mast is 0.53 times the wavelength at 1043 kHz, which is exactly the length at which a ground plane antenna provides the best surface radiation (ground wave). The guy ropes are each interrupted several times by insulating sections in order to have as little influence as possible on the antenna or the radiated fields. In addition to this mast, there was also a self-radiating lattice mast with roof capacity and a triangular antenna. Both antennas were demolished, the foundations and the feed point of the triangular antenna are still there.
The mast stands with a ceramic base on the voting house , a circular concrete structure in which the coils and capacitors (resonance transformer) and lightning protection devices required to adapt the feed cable to the antenna are housed.
The 250 kW transmitter worked with four water-cooled tube triodes of the type SRW 357 and is housed in a separate hall. It is connected to the transmission mast with a specially constructed coaxial, air-insulated overhead line ( trap line ), which is only preserved in remains. There is also a 20 kW tube transmitter. There was also a transmitter container with 2 transistor transmitters right next to the main mast, but these were sold after the shutdown.
The transmitter tubes, condensers and air coils made of tube are located in a hall in the main building of the transmitter. The power supply and cooling are located in the basement below.
Two installed in another room for emergency power supply ( "Diesel House") diesel generators served the safe operation, but served in emergency situations also partly the city Wilsdruff with electricity. It was marine diesel from the company WUMAG (or VEB Görlitzer Maschinenbau ) with 515 kW each, which, when started with compressed air, were ready for operation within 2… 3 minutes.
history
Construction of the 153 meter high tubular mast began in September 1952. After tests were carried out in September 1953, the Wilsdruff broadcasting center was officially inaugurated on May 8, 1954.
Until the 1990s, this transmitter with a power of 250 kilowatts was broadcast on the frequency 1044 kHz . In the GDR the station Radio DDR I was broadcast. Via the second transmitter, initially intended as a reserve, the Berliner Rundfunk program was later broadcast with 20 kW on 1089 kHz, and from 1978 on 1431 kHz.
From 1968 to 1969 the program of Radio Vltava , operated for propaganda purposes towards Czechoslovakia , was broadcast on 1430 kHz .
The transmitter is now a technical monument on the Saxon cultural monument list. As a relic of the Stalin era, the entire complex has been preserved almost in its original form with extensive security systems (two-row cranked barbed wire fence with a dog runway and watch towers).
Since the mid-1990s, the transmission power was only 20 kilowatts . The modern transmitter used for this is completely equipped with semiconductors and is housed in the rotunda on which the antenna mast is located. The MDR Sputnik program (developed from DT64 ) was broadcast for a while after its VHF transmission via the Dresden television tower had been switched off.
Until 2003 there was also a triangular surface antenna in Wilsdruff as a replacement antenna for the frequency 1044 kHz, the main antenna was the tubular mast.
In Wilsdruff, the program of the station MDR Info was broadcast on the frequency 1044 kHz until 2013 . Direct broadcasts from the sessions of the Saxon state parliament could also be received via this frequency, for which the MDR Info program was interrupted. From 2001 to 2003, a second transmitter was in Wilsdruff Mega Radio operates on 1431 kHz. He also used the pipe mast.
After the new tender, the frequency 1431 kHz was assigned to the voice of Russia by the Saxon State Media Authority SLM . The broadcast in Wilsdruff began on April 1, 2006, and programs from Moscow were broadcast in German, English and Russian. In December 2012, the Voice of Russia announced that it would discontinue its medium-wave broadcasts from Wilsdruff on January 1, 2013 for financial reasons. The medium-wave transmitters in Cremlingen-Abbenrode and Wachenbrunn were also affected by this measure .
On April 30, 2013 at 6:00 a.m., the medium-wave transmission from MDR Info from Wilsdruff ended with the activation of a notification loop that indicated the alternative reception channel DAB + and ran until May 6, 2013. After it was switched off at 6:00 a.m., an empty carrier ran on the Wilsdruff transmitter until the notification loop was switched on again at 9:00 a.m. on all three medium-wave transmitters (Wilsdruff, Wiederau and Reichenbach ). The transmitter in Wilsdruff was the last of the three transmitters to be switched off manually on site by a technician from the broadcaster operator Media Broadcast at 11:37 a.m. This means that there are no more radio transmissions from this location. A demolition of the transmission mast is to follow.
The local history museum of the city of Wilsdruff dedicates a special exhibition room to the station Wilsdruff, where a very informative, but not for sale, video DVD (50 minutes long) about the station can be viewed. Until November 1, 2015, a special exhibition in the local history museum of the city of Wilsdruff was dedicated to the transmitter.
The station was also open for viewing on “ Open Monument Day ”, an annual event. The site is normally not freely accessible.
In 2019, the owner of the mast, Media Broadcast, was granted the demolition permit despite a listed building. Then an association was founded with the aim of maintaining the mast. On May 26, 2020 it was announced that the rescue of the mast had failed and that it would now be finally torn down.
literature
- Hans-Joachim Böhme: Medium wave, 1043/1044 Kilohertz - 60 years of the large station Wilsdruff. In: The archive issue 3/2014; Pp. 82-86
- Siegfried Hermann, Wolf Kahle, Joachim Kniestedt: The German radio. Heidelberg 1994
- Hagen Pfau: Central German Broadcasting. Radio story (s). Altenburg 2000
- Federal archive signature DM303 / 1307
Web links
- J transmission mast Wilsdruff. In: Structurae
- Visit to the station Wilsdruff. www.JanBalzer.de, accessed on March 26, 2010 .
- Information on the former medium-wave transmitter Wilsdruff 1044 kHz ( Memento from September 3, 2011 in the Internet Archive )
- DM 303/1307: Radio Directorate of Deutsche Post - DM 303 Radio Directorate of Deutsche Post - 7 radio transmitters / dispatcher center - 7.1 transmission systems
- Petition to maintain the transmitter mast (2019)
- Technikverein Sender Wilsdruff
- Friends of the radio tower Wilsdruff eV
Individual evidence
- ↑ Cultural monuments in the Free State of Saxony - Monument Document No. 08964292 , accessed on April 11, 2019
- ↑ http://www.bbceng.info/Install/Transmitter%20Projects/Reminiscences/Lisnagarvey/Lisnagarvey_Blaw-Knox.htm Aubrey McKibben: Lisnagarvey and the Blaw-Knox mast (Effects of the length and shape of transmitter masts), accessed on 11. Apr. 2019
- ↑ a b https://www.radiomuseum.org/forum/mw_sender_wilsdruffsachsen.html , accessed on April 10, 2019
- ↑ dxaktuell.de: Russischer Rotstift: Voice of Russia shortens medium wave broadcasts from Germany
- ↑ dxaktuell.de: Voice of Russia: No more analog shortwave from Moscow for Germany, only 693 kHz remains
- ↑ radioeins.de: MW transmitter switched off in Saxony ( memento of the original from July 1, 2013 in the web archive archive.today ) Info: The archive link was automatically inserted and not yet checked. Please check the original and archive link according to the instructions and then remove this notice.
- ↑ youtube.com: Video with reference to the shutdown of MDR medium waves on April 30, 2013
- ↑ soundcloud.com: Recording of the transition to the hint loop on the morning of April 30, 2013
- ↑ Annett Heyse: Wilsdruffer radio mast should disappear from the landscape . In: Sächsische Zeitung , May 31, 2013
- ↑ Giant antenna is being torn down. Retrieved February 7, 2019 .
- ↑ https://www.radiomuseum.org/forum/eine_chance_fuer_den_sender_wilsdruff.html
