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JJY 60/40 KHZ
  JJY broadcasts a 50 kM signal on 40 kHz from a transmitter site on Mount Otakadoya, near Fukushima (37°22'N, 140°51'E), and a separate 50 kW signal on 60 kHz from a transmitter site on Mount Hagane (33°28'N, 130°11'E), located on Kyushu Island.
Both carrier signals contain an identical pulse -width modulated time code, and are transmitted 24 hours a day.