HFU HF Underground
Loggings => Utility => Topic started by: AlanC on February 14, 2017, 2323 UTC
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Channel marker D on 5292kHz; the keying is odd- the 'dah' is shorter than usual. The transmission is SSB with the carrier partially suppressed and the modulation is a keyed 1kHz tone which has a lot of second harmonic i.e at 2 kHz as well. Actually it has a lot in common with 'the pip'. This is not the D beacon we hear in the cluster beacons, whose keying is generally more accurate in timing and has a much cleaner transmission.