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RDL

RDL is a Russian military strategic broadcast. It can be heard on VLF and numerous HF frequencies.

The broadcast carries FSK-modulated Morse code and 50 Bd T-600 data, using the shift of 250 Hz on HF or 75 Hz on VLF. Morse messages include:

  1. "RDL RDL RDL" followed by two 5-digit groups repeated three times, followed by "K".
  2. "RDL RDL RDL" followed by 5-digit single groups. The first group is often 11111 or 22222, while the last group is the day of the month (first 2 digits) and the group count (last 3 digits). The message ends with "K".
  3. "Monolith" messages, usually addressed to WEGI or RGT77.

The following is a non-exhaustive list of RDL frequencies, most of which are active simultaneously.

  • 18.1 kHz
  • 3244 kHz
  • 3792 kHz
  • 3861 kHz
  • 4445 kHz
  • 4818 kHz
  • 5268 kHz
  • 5438 kHz
  • 6342 kHz
  • 7760 kHz
  • 7816 kHz
  • 10535 kHz
  • 11468 kHz
  • 12832 kHz
  • 14411 kHz
  • 14664 kHz
  • 16112 kHz
  • 17452 kHz
  • 17460 kHz
  • 19210 kHz
  • 20268 kHz
  • 22864 kHz