The Riga LVRTC Transmitter was a mediumwave transmitter in Ulbroka near Riga, Latvia, which broadcast on 945 kHz a music program in DRM-simulcast mode, which was receivable at night time in wide parts of Europe. It used as an antenna two guyed mast radiators. One of them was a 125 m-tall (410 ft) guyed lattice mast. The other smaller tower stays a Blaw-Knox Radiator. It is one of the few existing Blaw-Knox Radiators in Europe. Other towers of this type exist at Lisnagarvey, Northern Ireland, Lakihegy, Hungary, Vakarel, Bulgaria and Stara Zagora, Bulgaria.

Several masts were razed on 16 May 2010.