Mystery Signal on 6974.4 CW (Update: Probably M51) · by Nomadiq | Feb. 17, 2019, 11:23 p.m.
TDoA of Mystery Signal (UK/France Area)

Mystery Signal on 6974.4 CW (Update: Probably M51)

Mystery CW TX has been going on for some time this afternoon (Local) on 6974.4. It sounds like random numbers/letters and some punctuation. Maybe in a style like FFG (Five Figure Groups). Reported to be not heard in Germany. Heard well in North America. kiwiSDR network TDoA suggests South West UK as origin. See image. 

As logged here:

HFUnderground Post:,51142.msg182347.html#msg182347


Update: Most likey the French Military Station, M51. Info courtesy of Jim (MPJ) from UDXF.

SWR plot on a Loop UnderGround (LuG) · by Nomadiq | Jan. 25, 2019, 6:22 a.m.

Introducing images:









This text is arial - nice SWR graph above though, hey?


Now for a code snippet


for i in range(30):

def myfunc(value):
    value = value + 2
    return value

Image with caption:

Image Caption