HFU HF Underground

Loggings => Peskies => Topic started by: R4002 on February 12, 2026, 2230 UTC

Title: 7650 kHz LSB + 7655.5 kHz USB Fishermen (Severe QRM) 2230 UTC 12 Feb 2026
Post by: R4002 on February 12, 2026, 2230 UTC

Receiver: Wessex UK SDR receiver - South West UK.

Severe QRM from Russian military HF datalink network (FSK on 7657 kHz, 7656.5 kHz USB if tuned in USB mode).  200Hz FSK shift, extremely strong with multiple "mirror" sidebands (likely spurs)