Kalundborg transmitter
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Kalundborg transmitter
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| Basic data | |||||||||||||||||||||||||||||||||||||
| Place: | Vor Frue Sogn ( Kalundborg Municipality ) | ||||||||||||||||||||||||||||||||||||
| Region: | Zealand | ||||||||||||||||||||||||||||||||||||
| Country: | Denmark | ||||||||||||||||||||||||||||||||||||
| Coordinates: 55 ° 40 ′ 39 ″ N , 11 ° 4 ′ 9.1 ″ E | |||||||||||||||||||||||||||||||||||||
| Use: | Broadcasting station | ||||||||||||||||||||||||||||||||||||
| Accessibility: | Transmission system not accessible to the public | ||||||||||||||||||||||||||||||||||||
| Owner : | Danmarks Radio | ||||||||||||||||||||||||||||||||||||
| Data on the transmission system | |||||||||||||||||||||||||||||||||||||
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| Last modification (transmitter) : | October 2008 | ||||||||||||||||||||||||||||||||||||
| Wavebands : | LW transmitter , FM transmitter | ||||||||||||||||||||||||||||||||||||
| Radio : | LW broadcast , VHF broadcast | ||||||||||||||||||||||||||||||||||||
| Send types: | DVB-T , DRM | ||||||||||||||||||||||||||||||||||||
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The radio station Kalundborg near the town of the same name on the Danish island of Zealand is a long-wave transmitter that can also be received in Germany .
It is broadcast several times a day on the long wave frequency of 243 kHz in amplitude modulation .
Long wave transmitter
Two free-standing, grounded tower radiators with a triangular cross-section and a height of 118 m were used as the transmitting antenna for the long wave . The roof capacitance wires on top are fed by the transmitter at one end and are connected to the towers via resonance coils. The resulting large antenna currents are diverted into the earth via the towers ( Alexanderson antenna ). You can therefore get by with a lower overall height than with conventional longwave antennas.
The towers were originally 105 meters high, in 1954 they were lengthened to 118 meters and equipped with 20-meter-wide trusses or booms that could accommodate 8 radiator wires. The 13 meter high extension pieces that were attached at the time are clearly visible in the pictures.
From October 2008 the long wave 243 kHz in digital mode DRM (Digital Radio Mondiale) was put into operation for a few months with reduced power after the analog long wave broadcasts with 300 kW power were discontinued in 2007. As a result, the long-wave antenna was rebuilt and only two of the original eight radiator wires were retained. The traverses attached to the spiers in 1954 were also largely dismantled, relieving the load on the towers. The old analog long-wave transmitter took over the broadcasts with 300 kW from October 16 to 31, 2009 and was kept operational. In the summer of 2011, the Danish Broadcasting Corporation decided to give up medium wave transmission in favor of long wave 243 kHz. To this end, a new, fully transistorized long-wave transmitter of the Nautel NX50-LW type was installed to replace the old, 300 kW tube transmitter . Since then, sea weather reports, news, a gymnastics program, nautical news and occasional special programs on long wave with 50 kW can be heard. The broadcast is in analog AM mode.
Former medium wave transmitter
For the medium wave transmitter , a 147 m high self-radiating transmission mast , which was built in 1951 and isolated from earth, was used as the antenna . The location right by the sea and the associated good conductivity of the soil optimized the propagation of the electromagnetic waves it emits . He worked on the frequency 1062 kHz.
The medium wave mast, which had not been active since June 2011, was blown up on June 20, 2012.
TV filling station
The Kalundborg transmitter also serves as a television fill transmitter for the nearby town of Kalundborg. Today Danish DVB-T television (digital) comes from this location; in the past, analog television was also broadcast from here.
Web links
- Broadcast schedule for long wave 243 kHz (Danish)
- Announcement from Danmarks Radio on the occasion of the reactivation of the long wave (Danish)
See also
Individual evidence
- ↑ a b radioeins.de: Kalundborg medium wave antenna torn down ( page no longer available , search in web archives ) Info: The link was automatically marked as defective. Please check the link according to the instructions and then remove this notice.
- ↑ http://www.nautel.com/resources/customer-stories/danish-radio/
