दीर्घ तरंग का स्रोत देखें

The '''दीर्घ तरंग ''' [[रेडियो]] प्रसारण पट्टी 148.5 से 283.5 [[kHz]] (तदनुसार 1000 and 2000 [[मीटर]] के तरंग दैर्घ्य के बीच) के बीच पङने वाली सभी आवृत्तियाँ होतीं हैं।

यह समूह [[निम्न आवृत्ति (LF)|निम्न आवृत्ति]] (LF) पट्टी के अन्तर्गत आता है, जबकि यह पट्टी दीर्घ तरंग प्रसारण से अधिक आवृत्ति-रेंज तक होती है।

== दीर्घ तरंग प्रसारण प्रेषित्रों की सूची ==

(Source: [https://web.archive.org/web/20080219142045/http://de.wikipedia.org/wiki/Langwelle https://web.archive.org/web/20080219142045/http://de.wikipedia.org/wiki/Langwelle])। 
{| border="1" cellpadding="3" cellspacing="1"
|- bgcolor="#ddddff" align="center" valign="top"
! आवृत्ति
! स्टेशन नाम
! width="15%" | देश
! स्थिति
! एरियल प्रकार
! शक्ति
! टिप्पणी
|-
| rowspan=4 valign=top | 153&nbsp;kHz
| [[Deutschlandfunk]]
| {{DEU}}
| [[Sender Donebach|Donebach]]
| Directional aerial, two guyed steel lattice masts, 363 m high, fed at the top
| 500&nbsp;kW
| Night: 250&nbsp;kW
|-
| [[Radio Romania]]
| {{ROU}}
| [[Bod Transmitter|Braşov]]
| T-aerial on 2 guyed steel lattice masts with a height of 250 metres
| 1200&nbsp;kW
| &nbsp;
|-
| [[NRK Finnmark]]
| {{NOR}}
| [[Longwave transmitter Ingoy|Ingoy]]
| Omnidirectional aerial, guyed steel lattice mast of 362 m height, fed at the top
| 100&nbsp;kW
| &nbsp;
|-
| [[Al Kasirha]]
| {{ALG}}
| [[Bechar longwave transmitter|Bechar]]
| Three guyed steel lattice masts
| 1000&nbsp;kW
| &nbsp;
|-
| 162&nbsp;kHz
| [[France Inter]]
| {{FRA}}
| [[Longwave transmitter Allouis|Allouis]]
| Two guyed steel lattice masts, height 350 m, fed on the top
| 2000&nbsp;kW
| Time signal phase-modulated
|-
| rowspan=3 valign=top | 171&nbsp;kHz
| [[Medi 1]]
| {{MAR}}
| [[Nador transmitter|Nador]]
| Directional aerial consisting of three guyed steel lattice masts, 380 metres tall
| 2000&nbsp;kW
| &nbsp;
|-
| [[Radio Rossii]]
| {{RUS}}
| [[Bolshakovo transmitter|Bolshakovo]] near [[Kaliningrad]]
|
| 150/75&nbsp;kW
| &nbsp;
|-
| [[Radio Rossii]]
| {{UKR}}
| [[Krasne]] near [[Lwow]]
|
| 150/75&nbsp;kW
| inactive at present
|-
| 177&nbsp;kHz
| [[Deutschlandradio Kultur]]
| {{DEU}}
| [[Sender Zehlendorf|Zehlendorf]] near [[Oranienburg]]
| Omnidirectional aerial, cage aerial mounted on 359.7 m high guyed mast, triangle aerial on 3 150 m high guyed steel lattice masts
| 500&nbsp;kW
| Since August 29th, 2005 between 2 and 5 a.m. CET [[Digital Radio Mondiale|DRM]]-Mode 
Non-standard frequency (not divisible by 9)
|- 
| 183&nbsp;kHz
| [[Europe 1]]
| {{DEU}}
| [[Longwave transmitter Europe 1|Felsberg]]
| Directional aerial, 4 insulated guyed steel lattice masts, heights: 282 m, 280 m, 276 m and 270 m, 2 234 metre tall guyed steel lattice masts, which are insulated against ground as backup antenna
| 2000&nbsp;kW
| French Programme
Non-standard frequency (not divisible by 9)
|-
| rowspan=2 valign=top | 189&nbsp;kHz
| [[RÚV]]
| {{ISL}}
| [[Longwave radio mast Hellissandur|Gufuskalar near Hellissandur]]
| Slight oval bi-directivity aerial, top loaded parallel connected triangular loops, mast as a common member, all guys insulated except two radiating diametrically opposed grounded top guys, loops closed by copper straps in the ground from two conducting guy grounding points to base of the guyed steel lattice mast insulated against ground, height 412m
| 300&nbsp;kW
| RÚV national programs 1 and 2 Rás 1 and Rás 2
|-
| [[Radiotelevisione Italiana|RAI]]
| {{ITA}}
| [[Transmitter Caltanissetta|Caltanissetta]]
| Omnidirectional aerial, guyed steel lattice mast, height 282 m
| 10&nbsp;kW
| Inactive since August 2004
|-
| rowspan=5 valign=top | 198&nbsp;kHz
| [[BBC Radio 4]]
| {{GBR}}
| [[Droitwich transmitting station|Droitwich]]
| T-aerial on 2 guyed steel lattice masts insulated against ground with a height of 213 metres
| 500&nbsp;kW
| Relays [[BBC World Service]] after the end of its own programmes.
|-
| BBC Radio 4
| {{GBR}}
| [[Burghead transmitting station|Burghead]]
| Omnidirectional aerial, guyed steel lattice mast
| 50&nbsp;kW
| &nbsp;
|-
| BBC Radio 4
| {{GBR}}
| [[Westerglen transmitting station|Westerglen]]
| Omnidirectional aerial, guyed steel lattice mast, height 152 m
| 50&nbsp;kW
| &nbsp;
|-
| [[Polskie Radio|Polskie Radio Parlament/Program 1]]
| {{POL}}
| [[Longwave transmitter Raszyn|Raszyn]]
| Omnidirectional aerial, guyed steel lattice mast insulated against ground, 335 m high
| 500&nbsp;kW
| Only active during the daytime
|-
| [[Radio Majak]]
| {{RUS}}
| Sankt Petersburg - [[Olgino transmitter|Olgino]]
| Omnidirectional aerial, 205 m high guyed steel lattice mast
| 150&nbsp;kW
| 
|-
| rowspan=2 valign=top | 207&nbsp;kHz
| [[RÚV]]
| {{ISL}}
| [[Longwave radio mast Eiðar|Eiðar near Egilsstaðir]]
| Omnidirectional aerial, steel lattice mast insulated against ground, height 220m
| 100&nbsp;kW
| RÚV national programs 1 and 2 Rás 1 and Rás 2
|-
| [[Deutschlandfunk]]
| {{DEU}}
| [[Aholming transmitter|Aholming]]
| Directional aerial, two guyed steel lattice masts, 265 m high, fed at the top
| 500&nbsp;kW
| Night: 250&nbsp;kW
|-
| 216&nbsp;kHz
| [[Radio Monte Carlo]]
| {{MCO}}
| [[Transmitter Roumoules|Roumoules]]
| Directional aerial, 3 300 metre high guyed steel lattice masts, 330 metre high guyed steel lattice mast as backup aerial
| 1200&nbsp;kW
| Transmitter site exterritorial, exclave of Monaco
|-
| 225&nbsp;kHz
| [[Polskie Radio|Polskie Radio Program 1]]
| {{POL}}
| [[Longwave-transmitter Solec Kujawski|Solec Kujawski]]
| Directional aerial, 2 guyed radio masts fed on the top, heights 330 m and 289 m
| 1000&nbsp;kW
| Earlier transmitter site [[Warszawa Radio Mast|Konstantynów]]
|-
| rowspan=2 valign=top |234&nbsp;kHz
| [[RTL Group|RTL]]
| {{LUX}}
| [[Beidweiler Longwave Transmitter|Beidweiler]]
| Directional aerial, 3 guyed grounded steel lattice masts, 290 m high, with vertical cage aerials
| 2000&nbsp;kW
| Spare transmitter site [[Longwave transmitter Junglinster|Junglinster]]
|-
| [[Radio 1]]
| {{RUS}}
| [[Krasny Bor transmitter]]
| Omnidirectional aerial, 271.5 metres tall guyed mast with cage antenna
| 1200&nbsp;kW
| May be inactive at present
|-
| 243&nbsp;kHz
| [[Danmarks Radio]]
| {{DNK}}
| [[Transmitter Kalundborg|Kalundborg]]
| Alexanderson aerial, carried from 2 118 Meter high free-standing steel lattice towers
| 300&nbsp;kW 
| Stop 15 फ़रवरी 2007
|-
| rowspan=2 valign=top | 252&nbsp;kHz
| [[RTA Algier]]
| {{DZA}}
| Tipaza
| Omnidirectional aerial, single guyed lattice steel mast
| 1500&nbsp;kW
| French programme; during night-time half transmitter-power
|-
| [[RTÉ Radio 1]]
| {{IRL}}
| [[longwave transmitter Clarkestown|Clarkestown]]
| Omnidirectional aerial, guyed steel lattice mast, insulated against ground, height 248 m
| 500&nbsp;kW
| Earlier used by [[Atlantic 252]] and [[TeamTalk 252]], decreases power at night to 100&nbsp;kW, one website reported the callsign of this station to be EIRE
|-
| rowspan=3 valign=top | 261&nbsp;kHz
| [[Transmitter Burg]]
| {{DEU}}
| [[AM transmitter Burg|Burg]]
| Omnidirectional aerial, cage aerial on 324 m high guyed, grounded steel lattice mast, 210 m high steel tube mast, insulated against ground
| 200&nbsp;kW
| Inactive at the moment, formerly used by [[Radio Wolga]] and [[Radioropa Info]]
|-
| [[Radio Rossii]]
| {{RUS}}
| [[Taldom transmitter|Taldom]]
| Omnidirectional aerial, central mast, 275 metre tall, surrounded by 5 guyed masts on a circle around
| 2500&nbsp;kW
| Most powerful transmitter in the world
|-
| [[Radio Horizont]]
| {{BGR}}
| [[Vakarel Transmitter|Vakarel]]
| One of the few Blaw-Knox Towers in Europe, 215m high
| 75&nbsp;kW
| 
|-
| 270&nbsp;kHz
| [[ČRO 1]] - Radiožurnál
| {{CZE}}
| [[Topolna transmitter|Topolna]]
| Directional aerial (maximum of radiation in East-West direction), two grounded 257 m high guyed steel lattice mast with [[cage aerial]]s
| 500&nbsp;kW
| &nbsp;
|-
| rowspan=3 valign=top | 279&nbsp;kHz
| [[Musicmann279]]
| {{IMN}}
| ± 5&nbsp;km off [[Ramsey, Isle of Man|Ramsey]]
| [[Crossed field antenna]]
| 500&nbsp;kW
| Tests originally planned to begin in early [[२००५|2005]] pending a summer 2005 launch; [[as of 2006]], considerable uncertainty as to actual launch date; [[as of 2007]], key personnel have resigned and company's future is uncertain. In October 2007 the Company's web sites disappeared.
|-
| [[Belaruskaje Radyjo 1]] (BR1)
| {{BLR}}
| [[Sasnovy]]
|
| 500&nbsp;kW
| &nbsp;
|-
| [[Radio Mayak]] (RUS)
| {{RUS}}
| [[Yekaterinburg]]
| Omnidirectional aerial, guyed steel lattice mast of 256 m height, fed at the top
| 50&nbsp;kW
| &nbsp;
|}
<br />
----

[[चित्र:height diagram1.gif|800px|thumb|Height diagram of the antenna towers and antenna masts of longwave broadcasting stations]]

{{विद्युतचुंबकीय वर्णक्रम}}
{{रेडियो वर्णक्रम}}

[[श्रेणी:रेडियो]]
[[श्रेणी:वर्णक्रम]]
[[श्रेणी:विज्ञान]]
[[श्रेणी:विद्युत चुम्बकीय वर्णक्रम]]

{{विज्ञान-आधार}}