EU4U — FT8 activity observed at SO8OO

Observed FT8 message patterns

Attributed sample

4,218 messages

Active dates

57 UTC dates

Estimated median S/N

-3 dB

Estimated 10th-90th percentile

-9 to +6 dB

Recurring-pattern threshold

Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 21, moderate (-15 to -9 dB) 525, strong (≥ -8 dB) 3,672.

WSJT-X defines S/N reports against a 2,500 Hz reference noise bandwidth. The ranges above are SO8OO receiver-side display categories, not official WSJT-X classes, transmitter-power measurements or estimates of how easy the station is to hear elsewhere. Statistics include only successful decodes on SO8OO's monitored FT8 channels; transmissions that were not decoded are absent.

Frequent counterpart tokens observed at SO8OO

Tokens most often paired with EU4U in decoded directed-looking exchanges:

Attributed messages by UTC hour

Rolling 90-day UTC chart window. Counts follow decoded message structure: the first token for CQ, or the second token in a directed-looking message.

Most frequent locator attributed to EU4U

The map compares the centres and boundaries of the locator field attributed to this token by decoded message structure, 2° × 1° as a Maidenhead square, and SO8OO's six-character receiver square. The separation is not an exact antenna-to-antenna distance or a radio-path length.

Attributed locator

KO23 · 2,881 decoded messages

SO8OO receiver locator

KN09VW

Locator-centre separation

454 km (approx.)

Last such locator decoded

2026-09-09 18:07 UTC

A decoded locator can describe portable, remote or special-event operation and is not proof of a permanent station address or transmitter identity.

Observed FT8 exchanges

S/N cells show: decoded at SO8OO / report transmitted by the counterpart. An observed exchange is not a QSL or an official logbook confirmation.

Recent FT8 messages decoded at SO8OO

Frequency values are decoder audio offsets in hertz, not RF frequencies.

UTC    dB Audio  Message
175545 +11 2808  CQ EU4U KO23                          a1 (x3)
175815  +7 2808  IH9/IT9JUI EU4U -05
175845  +8 2808  CQ EU4U KO23                          a1 (x2)
180145  +5 2611  UA3PTY EU4U RR73
180200  +5 2611  EU4U UA3PTY 73
180515  +4 2611  CQ EU4U KO23 (x5)
180845  +9 2612  RN3RHQ EU4U R-15 (x2)

UTC    dB Audio  Message
213500 -13 2803  RI1FJL EU4U KO23 (x15)

UTC    dB Audio  Message
210445 +12 2740  RI1FJL EU4U KO23 (x15)

UTC    dB Audio  Message
035430 -19 1769  EU4U RV9CD MO06 (x4)
035845  -9 3085  EU4U UB8CPH 73
035945 -12  658  EU4U R8FH 73
172230 -15 1051  EU4U PE1JDR JO21
172330  -4 1134  EU4U DF1WR JN39 (x3)
173700  -6 1616  EU4U <...> R-13 (x3)
174345 -18 2645  CQ EU4U KO23                          a1
175130  +1 2642  EU4U M7GYP IO93

UTC    dB Audio  Message
145045 -11 1798  EU4U DL9KM 73
145245 -14  973  EU4U S55A JN65 (x3)
150830  +4 2831  EU4U DK3HV R-10
151200 -21 1796  EU4U CN2DX R-14
152430 -14 2047  EU4U PD1ADA JO21
153100 -10 2096  EU4U DO6KDS R-05 (x2)
153400  -6 1194  EU4U DN9DSP JO31 (x2)
153930 -17 2097  EU4U DO6KDS JO30
154230  -6 2706  EU4U RN6MA +15 (x2)
093445 -22 2159  EU4U RV6HE RR73

Decoder S/N history by band

Count-weighted daily averages across messages attributed to this profiled token and successfully decoded at SO8OO, limited to the rolling 90-day UTC chart window.