Cremlingen transmitter
The transmitter Cremlingen - Abbenrode is operated by Deutsche Telekom AG transmitter for medium wave. It is located near Cremlingen - Abbenrode. From Highways 2 and 39 from the system between runs Brunswick- East and the King of Clubs Lutter is easy to recognize.
The existing since 1962 transmitter is mentioned in relevant publications as medium wave transmitter Braunschweig, medium-wave transmitter king Lutter or medium-wave transmitter Cremlingen.
Visible from outside the facility has three insulated from earth, self-radiating transmission towers, which are 188 meters, 137 meters and 99 meters high.
History
On September 30, 1962 went here for the first time a 100 kW transmitter on the frequency 755 kHz by the Germany radio program in operation. The antenna used was a 137 -meter reflector. Just one year later, the transmission power was increased to 200 kilowatts. Since there but at night interferes with the DLF transmitter Ravensburg came (20 kW), Cremlingen was allowed only during the send on this frequency.
As of October 1963, a second medium-wave transmitter was built, because the frequency used by AFN Munich had been released 548 kHz. This channel was initially operated with 200 kilowatts. The antenna system consisted of a 240 meter high guyed steel tube masts and a steel truss masts as a reflector. The signal suppression in southeastern direction suppressed during the dark co-channel interference with the Soviet Radio Mayak.
The second frequency 755 kHz could continue to be used only during the day with 200 kW transmitter Ravensburg had since been upgraded to 100 kW power ( 20 kW at night ).
From 1 October 1967, the transmit power for 548 kHz (at night 400 kW) increased to 800 kilowatts. The for those times extremely high transmit power ensured an excellent supply almost the entire GDR and the Federal Republic of Germany to the north of the DLF program.
With the entry into force of the Geneva wave plan on November 1, 1978, the day powerful medium wave 548 kHz had to be abandoned in favor of other DLF transmitter sites.
Both existing transmitter systems were then converted for joint operation at 756 kHz. The directional antenna position was adjusted by shortening the 240 - meter boom to 199 m of the higher frequency. The 137- m antenna mast was from that time only as a reserve antenna.
For the day's operation then you took advantage of the large transmitter with 800 kW in omnidirectional night of the 200 kW transmitter was connected to the directional antenna with suppression southeast.
The mid-1990s began the Germany -wide shutdown of coastal radio stations as well as the reduction of the supply on medium wave. The 800 -kW tube transmitters have since been replaced by two 100 kW transmitters. 2005 again was a fully transistorized and DRM -enabled system TRAM / P 800 replaced by Transradio SenderSysteme Berlin. Since the dismantling of the tube station Cremlingen sent the DLF program never with more than 200 kW transmission power.
Use of the reserve system
Since 1978, the 137- m mast only served as a reserve antenna. As of 2001, it was aired over here on the shared frequency 630 kHz by the NDR, the program of mega radio. On the day of the transmit power was 100 kW, the night performance to have amounted to 17 kilowatts. The operation of the transmitter was set in 2003 after the withdrawal of mega radio again.
Since 1 April 2005, the " Voice of Russia " ( " Voice of Russia ") was sent on the frequency 630 kHz through this system. However, at 1 January 2013, the operator announced all leases for German MW transmitters. Due to a technical error, the transmitter system in Cremlingen - Abbenrode was automatically turned off until January 2, 2013 at 13:30 clock, the others transmitters, however, scheduled for 31 December 2012. Voice of Russia supplies Europe since 2014 only on short wave.
Pictures
Transmitter for 630 kHz, consisting of a 137 meter high lattice steel mast