 In 1963, Becker introduced the Monte Carlo, a tubeless solid state radio with no vacuum tubes.From 1974 to 2005, the Autofahrer-Rundfunk-Informationssystem was used by the German ARD network.Developed jointly by the Institut für Rundfunktechnik and Blaupunkt, it indicated the presence of traffic announcements through manipulation of the 57kHz subcarrier of the station's FM signal.