Loggings > VHF/UHF Logs, including satellites and radiosondes

French Traffic Signal Control 31.325 MHz 31.6875 MHz and 31.975 MHz Heard In USA

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R4002:
I’ve managed to catch a polytone signal (sounds a lot like ROS) on 31.325 and 31.975. 

Apparently these are traffic signal (traffic light) control signals from France. Very low power.  Pretty decent catch during VHF low band opening. 

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