HFU HF Underground
Loggings => 10/11 meters => Topic started by: R4002 on October 21, 2026, 1243 UTC
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29.7 MHz 29700kHz center frequency 29.700MHz FM
MFSK signal, bandwidth 6 kHz or so, transmission duration anywhere from 1.5 to 3-4 seconds.
I think this is a pager signal or data link of some kind. Receiver is the G8JNJ SDR receiver located in the South West UK. Tune in time: 1230 UTC on October 21st, 2026.