The Beidweiler longwave transmitter is a high-power broadcasting transmission site owned by RTL Group and operated by RTL company Broadcasting Center Europe. It was used to transmit the French-speaking programme of RTL on longwave frequency 234 kHz until 1 January 2023. Based in Beidweiler, Luxembourg, the transmission site is situated at 49°43'58" N and 6°19'08" E and went into service in 1972 as replacement of the old Junglinster Longwave Transmitter. Junglinster remained in use as a backup site and for additional broadcast services.