Kalundborg Transmitter
Encyclopedia
Kalundborg Radio is a major transmission facility for long
- and mediumwave
at the harbour of Kalundborg
in Denmark
. The site was inaugurated in 1927 and now has transmitters for 243 kHz longwave with 300 kW and 1.062 kHz mediumwave with 250 kW plus a common reserve transmitter.
For the longwave transmitter an Alexanderson aerial
is used, with two grounded 118 m steel lattice radiating towers connected by top capacitance wires. The northern tower is fed from the transmitter through a top coil, with the top coil of the southern slave tower being fed via the capacitance wires.
The medium wave transmitter uses an insulated guyed steel lattice mast aerial with a height of 147 metres. All mast virtually stand in the sea on the narrow Gisseløre peninsula, which allows for excellent radiation efficiency.
In 2007, analogue transmission on longwave from Kalundborg were suspended after 80 years of service. Longwave transmissions were resumed in DRM
(Digital Radio Mondiale) at reduced power on 3 October 2008 after substantial modifications to the aerial earlier that year.
Analogue transmissions continued on mediumwave with a restricted time schedule until 27 June 2011, when the mediumwave transmitter was taken out of service and replaced by a new longwave transmitter. The analogue transmissions on 243 kHz long wave will continue until at least the end of 2014.
The old analogue long- and mediumwave reserve transmitter is known to have replaced the mediumwave and DRM transmitters on longwave from 16-31 October 2009, and the antenna tower for mediumwave is still standing.
Longwave
In radio, longwave refers to parts of radio spectrum with relatively long wavelengths. The term is a historic one dating from the early 20th century, when the radio spectrum was considered to consist of long, medium and short wavelengths...
- and mediumwave
Mediumwave
Medium wave is the part of the medium frequency radio band used mainly for AM radio broadcasting. For Europe the MW band ranges from 526.5 kHz to 1606.5 kHz...
at the harbour of Kalundborg
Kalundborg
Kalundborg is a city with a population of 16,434 in Kalundborg municipality in Denmark and the site of its municipal council. Kalundborg is on the main island Zealand, with Copenhagen, but opposite on the far western edge....
in Denmark
Denmark
Denmark is a Scandinavian country in Northern Europe. The countries of Denmark and Greenland, as well as the Faroe Islands, constitute the Kingdom of Denmark . It is the southernmost of the Nordic countries, southwest of Sweden and south of Norway, and bordered to the south by Germany. Denmark...
. The site was inaugurated in 1927 and now has transmitters for 243 kHz longwave with 300 kW and 1.062 kHz mediumwave with 250 kW plus a common reserve transmitter.
Ernst Alexanderson
Ernst Frederick Werner Alexanderson was a Swedish-American electrical engineer, who was a pioneer in radio and television development.-Background:...
is used, with two grounded 118 m steel lattice radiating towers connected by top capacitance wires. The northern tower is fed from the transmitter through a top coil, with the top coil of the southern slave tower being fed via the capacitance wires.
Digital Radio Mondiale
Digital Radio Mondiale is a set of digital audio broadcasting technologies designed to work over the bands currently used for AM broadcasting, particularly shortwave...
(Digital Radio Mondiale) at reduced power on 3 October 2008 after substantial modifications to the aerial earlier that year.
Analogue transmissions continued on mediumwave with a restricted time schedule until 27 June 2011, when the mediumwave transmitter was taken out of service and replaced by a new longwave transmitter. The analogue transmissions on 243 kHz long wave will continue until at least the end of 2014.
The old analogue long- and mediumwave reserve transmitter is known to have replaced the mediumwave and DRM transmitters on longwave from 16-31 October 2009, and the antenna tower for mediumwave is still standing.
External links
- How to receive DRM from Kalundborg
- http://www.skyscraperpage.com/diagrams/?b45594
- http://www.skyscraperpage.com/diagrams/?b45595
- http://www.skyscraperpage.com/diagrams/?b45596