|Frequencies||Between 3219 and 22910 kHz|
|Known counterpart stations|
S05 was operated by Czechoslovak State Security (StB) under an ITU-registered callsign "OLX" (though officially assigned to ČTK, the press agency) and allocated frequencies. The language was Czech. Replaced in early 1980s by S05a.
|Repeated for 2 minutes|
|424||73||57966 85288 30427 ...||Opakuji||73||57966 85288 30427 ...||Konec|
|3-figure ID||Amount of 5-figure groups in the message||5-figure single groups||"[I] Repeat"||Amount of 5-figure groups in the message||5-figure single groups||"End"|
|Repeated for 5 minutes||Repeated twice||Repeated twice|