The SWL QSL Museum Czech Republic Europe Radio Station OLX - Prague, Station Info QSL Contributed by Rudolf Takacs (Romania)  Station Info Presumed to be operated by the Czech Secret Service (Statni Tajna Bezpecnost, State Secret Security), this station was extremely active for many years before going silent August 3rd during the great floods in Central Europe in the summer of 1997. It has also been reported that the Czech Secret Service was planning to close operations anyway. Transmissions began five minutes before the hour with a morse code ID. The message started at the hour, and both CW and voice (SSB) were used. Transmissions were 23 hrs a day, with no transmission at 2200Z.