OLB5 was the callsign of a Czech time signal radio station. The station was located at Poděbrady and transmitted time signals which originated from the OMA (time signal) clock at Liblice.
The station transmitted in the HF band, on 3170 kHz with 1 kW.
- ^ Gerd Klawitter (1980). List of Time Signal Stations (9th Edition). pp. 21–22.