HFU HF Underground
Loggings => 10/11 meters => Topic started by: R4002 on October 23, 2026, 1326 UTC
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Received via UK based SDR receiver - Wessex UK (G8JNJ SDR).
26.95 MHz 26,950 kHz 26950 kHz 26.9500 MHz data bursts, getting severe adjacent-channel QRM from the 2 watt Russian data link systems transmitting telemetry, paging, RCRS - like and pager-like signals on 26.945 MHz 26945 kHz and the 2 watt Russian data link systems on 26.960 MHz 26960 kHz 26.96MHz as well.
The 26.945 MHz and 26.960 MHz 2w allocations are defined using the following bands:
26.945MHz | 26945 kHz center frequency - 2 watt power limit, band limit defined as 26.939 MHz - 26.951 MHz | 26939 kHz - 26951 kHz
26.960MHz | 26960 kHz center frequency - 2 watt power limit, band limit defined as 26.954 MHz - 26.966 MHz | 26954 kHz - 26966 kHz
26.945 MHz and 26.960 MHz are also allocated for alarm data links, 12 kHz bandwidth and 10% duty cycle limits. The 12 kHz bandwidth limit does match with the band limits above. Either way, the system on 26.950 MHz is getting clobbered by QRM from both frequencies at the moment. Seems like 26.950 is used in Western Europe and/or Central Europe, so (most of the time) interference is probably not a problem.