Freiburg fiefdom transmitter
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Freiburg fiefdom transmitter
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| Basic data | ||||
| Place: | Fiefdom (Freiburg im Breisgau) | |||
| Country: | Baden-Württemberg | |||
| Country: | Germany | |||
| Altitude : | 227 m above sea level NHN | |||
| Coordinates: 48 ° 0 '48.2 " N , 7 ° 47' 37.2" E | ||||
| Use: | Broadcasting station | |||
| Owner : | Südwestrundfunk | |||
| Mast data | ||||
| Construction time : | 1945 | |||
| Operating time: | since October 1945 | |||
| Total height : | 92 m | |||
| Total mass : | 20 t | |||
| Data on the transmission system | ||||
| Waveband : | FM transmitter | |||
| Radio : | VHF broadcasting | |||
| Position map | ||||
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The transmitter Freiburg-Lehen is a transmitter of the Südwestrundfunk in the field of ultra-short wave (VHF) and was a system for the medium wave (MW). The 92 meter high transmission mast is located in the Freiburg district of Lehen . The Freiburg radio station went into operation in 1926, making it one of the oldest broadcasting locations in Germany. The Freiburg-Lehen transmitter went into operation on December 20, 1933. Some of the masts on which a trap line was once laid to feed the transmission mast can still be seen today. Further transmission systems (Feldberg / Black Forest, Blauen, Wannenberg and Hohe Möhr) and over 100 television fill transmitters are operated from this location . In addition, there is a collaboration with Swisscom at the St. Chrischona transmitter near Basel to operate additional VHF transmitters.
Current technology
The transmission mast is designed as a three-sided guyed steel lattice mast and has a square cross-section with an edge length of 1.2 m and a total weight of 20 t. The VHF antennas are located in the upper quarter of the antenna mast, which itself served as an antenna for the medium wave. The adaptation and feeding of this medium wave antenna was carried out at the isolated base point via a tunable adapter circuit. Both the VHF and the medium wave transmitter have automatic backup systems to ensure uninterrupted operation. The larger transmission systems that are looked after by the Lehen transmitter are controlled via computer-aided telecontrol systems.
Frequencies and Programs
Analog radio (VHF)
|
Frequency (MHz) |
program | RDS PS | RDS PI | Regionalization |
ERP (kW) |
Antenna pattern round (ND) / directional (D) |
Polarization horizontal (H) / vertical (V) |
|---|---|---|---|---|---|---|---|
| 91.1 | THE THING | THE THING_ | D3A5 | - | 0.5 | D (10–210 °) | H |
| 94.7 | baden.fm | baden.fm | 1702 | - | 0.5 | D (10–210 °) | H |
| 96.0 | SWR2 | __SWR2__ | D3A2 | - | 1 | D (40-180 °) | H |
| 99.2 | SWR3 | __SWR3__ | D3A3 | Baden / Electoral Palatinate | 0.5 | D (10–210 °) | H |
| 107.0 | SWR1 Baden-Württemberg | SWR1_BW_ | D301 | - | 0.1 | ND | H |
history
In 1926 the transmitter in Stuttgart-Feuerbach was replaced by a new transmitter in Degerloch . Since coverage in the Freiburg area was not guaranteed despite this transmitter, a transmitter was also set up in Freiburg.
The transmitter went into operation for the first time in 1926; until 1933 was broadcast from the top floor of the municipal trade school on Kirchstrasse in the Freiburg city area. From December 20, 1933, this transmitter was replaced by the new transmitter with a 107 m high wooden tower. This transmitter was at its current location west of the village of Lehen. It was in operation until April 21, 1945 when it was blown up by the Wehrmacht . In October 1945, today's self-radiating steel lattice mast with a height of 92 m began operation at the same location. In 1948, the post office handed over the transmitter to Südwestfunk (SWF). On May 23, 1989 the new company building was inaugurated.
Technical history
| year | Sender type | power | program |
|---|---|---|---|
| Transmitter in the vocational school | |||
| November 28, 1926 | Medium wave 520 kHz | 0.25 kW | Program of the " Süddeutsche Rundfunk AG Stuttgart " |
| June 30, 1929 | Medium wave 527 kHz | Reason: Prague wave plan | |
| October 28, 1933 | The program from Frankfurt was adopted. | ||
| January 14, 1934 | Cessation of transmission | Reason: Lucerne wave plan | |
| Transmitter in Freiburg fiefdom | |||
| December 20, 1933 | Medium wave 1157 kHz in single-frequency operation with the Frankfurt mother station in the "Southwest German single-frequency network" | 5-8 kW | |
| January 15, 1929 | Medium wave 1195 kHz | 5-8 kW | Reason: Lucerne wave plan |
| June 23, 1939 | Medium wave 1294 kHz in single wave operation with the Dornbirn transmitter | 5-8 kW | The Stuttgart program was broadcast again. |
| April 15, 1945 | Cessation of transmission | Reason: After failures of the power supply became more frequent, the operation was stopped after the breakdown of the overland network. | |
| April 21, 1945 | The antenna tower was blown up by the Wehrmacht | ||
| October 1945 | Resumption of broadcasting with a self-radiating steel lattice mast | ||
| 1946 | Medium wave 1240 kHz | 5-8 kW | |
| 1947 | Medium wave 827 kHz | 5-8 kW | |
| 1948 | Handover of the transmitter from the Post to the SWF | ||
| August 1948 | Medium wave 827 kHz | 18-20 kW | |
| September 1953 | Dual transmitter with 2 × 20 kW (interconnected to 40 kW) |
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| November 25, 1976 |
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500 W each | All three programs of the SWF |
| November 23, 1978 | Medium wave 828 kHz | Reason: International Geneva Wave Plan ; SWF 1 and special programs | |
| October 1984 | FM 102.00 MHz, later 100.7 | There is also an additional regional program. | |
| September 26, 1986 | FM 102.00 MHz, later 100.7 | Suspension of the regional program, instead of a guest worker program | |
| 3rd September 1988 | 50 kW | the regional program “Radio Breisgau” is added | |
| 10 kW | Reduction of the transmission power | ||
| January 8, 2012 | Medium wave 828 kHz | Final shutdown of the medium wave transmitter | |
| 4th july 2016 |
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1000 W | new frequency for SWR2 |
| 22nd August 2016 | FM 91.10 MHz | 500 W | DASDING begins broadcasting |
Shutdown and shutdown of the medium wave transmitter
The medium-wave transmitter in Freiburg-Lehen was finally switched off on January 8, 2012 at 11 p.m. after the regular broadcasting deadline, as SWR wanted to give up the very cost-intensive broadcast of its information program SWR cont.ra via medium-wave transmitters in Baden-Württemberg and Rhineland-Palatinate. Instead, the SWR wants to concentrate on building a nationwide coverage of its programs via DAB + .
It has not yet been clarified whether the parts of the medium wave transmission system will be dismantled and scrapped or made available to other broadcasters to broadcast their programs via medium wave.
literature
- Commemorative publication of the SWF for the commissioning of the new company building in 1989
- Public information Südwestfunk Sender Freiburg Lehen
Web links
- Photos from the Freiburg-Lehen transmitter
- Information on the former medium-wave transmitter Freiburg-Lehen 828 kHz ( Memento from September 3, 2011 in the Internet Archive )