== Ekterne henvisninger ==
* [http://www.radionyt.com/artikel/default.asp?id=13461 DR vil beholde 243 kHz]
* [http://www.drmrx.org/forum/showthread.php?t=1925 DRMRX User Forum: DR Kalundborg on 243 kHz]
* [http://www.drmradio.dk Dansksproget hjemmeside om modtagelse af DRM]
* [http://mediumwave.info/newsarchive_d.html New transmitter towers for Denmark 243 kHz] {{Webarchive|url=https://web.archive.org/web/20080908043338/http://www.mediumwave.info/newsarchive_d.html |date= 8. september 2008 }}
* [http://www.dxinfocentre.com/ William Hepburn's Radio & TV DX Information Centre]
* [http://www.dr.dk/DRPresse/Artikler/2011/06/15/162856.htm Nu kommer der atter liv i langbølgen] {{Webarchive|url=https://web.archive.org/web/20110806003029/http://www.dr.dk/DRPresse/Artikler/2011/06/15/162856.htm |date= 6. august 2011 }}
Fysik