UT4XU — reception at SO8OO

Signals decoded by SO8OO in southeastern Poland. FT8 and CW have separate histories; all times are UTC.

FT8 activity

DXCC entity inferred from callsign: Ukraine Most frequent locator attributed to this token: KO40

Receiver-side FT8 activity involving UT4XU, decoded by SO8OO in southeastern Poland. 207 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, 10m, across 18 UTC dates in the available aggregate history. Observed between 2026-06-08 and 2026-11-03.

These are automated observations at the SO8OO receiver, not an official contact log. Times are UTC. Attribution follows decoded FT8 message structure: CQ uses the first token and directed-looking messages use the second. Free text that resembles a directed message can be attributed imperfectly. Summary S/N reflects propagation plus SO8OO receiver, antenna and local-noise conditions. Counts are not adjusted for monitoring outages; transmissions that were not decoded are absent. Inferred entity and location data may be inaccurate for portable, remote or special-event operation.

SO8OO decoded 207 FT8 messages attributed to UT4XU as the transmitting token by decoded message structure across 18 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (59%), followed by 80 m (32%) and 20 m (6%). Most decodes (54%) fell within the six-hour window 06:00-12:00 UTC. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (82%); the estimated median was 0 dB.

Overview

207
Messages attributed
18
UTC dates decoded
50
Active 15-min windows
0 dB
Estimated median S/N

Bands

80m · 66 40m · 123 20m · 12 10m · 6
First attributed message: 2026-06-08
Last attributed message: 2026-11-03 12:05 UTC

Observed FT8 message patterns

Attributed sample
207 messages
Active dates
18 UTC dates
Estimated median S/N
0 dB
Estimated 10th-90th percentile
-12 to +13 dB
Recurring-pattern threshold
Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 8, moderate (-15 to -9 dB) 29, strong (≥ -8 dB) 170.

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 UT4XU 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 UT4XU

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
KO40 · 161 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
516 km (approx.)
Last such locator decoded
2026-11-03 12:04 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.

Time UTCBandUT4XU S/NCounterpartCounterpart S/NMsgsCapture
11-03 12:03 40m -10 / - PC40EUDXF - / -19 4 Partial capture
11-03 11:30 40m -1 / -9 PF40EUDXF -9 / -12 3 Partial capture
11-02 13:50 40m -2 / - DK0GV - / - 8 Partial capture
11-01 16:27 40m -10 / - DK0GV - / - 2 Partial capture
11-01 14:51 40m +4 / - DK0GV - / - 2 Partial capture
10-23 09:14 10m - / -9 CS7BMX -16 / - 2 ✓ Closing fragment
09-23 15:23 10m - / -6 CN8WK -12 / - 2 ✓ Closing fragment
09-22 11:43 10m - / +3 EA7AKL +3 / - 2 ✓ Closing fragment
09-21 15:57 80m +16 / - RI1FJZ - / -21 8 ✓ Closing fragment
09-14 18:04 80m +10 / -14 EH3ST -18 / -10 11 ✓ Full exchange observed
09-14 06:41 40m -9 / - EH3ST - / - 5 Partial capture
09-12 06:40 40m - / -7 YO3ANS -8 / - 4 ✓ Closing fragment
09-12 06:39 40m -6 / -7 EU4U +6 / -14 4 ✓ Full exchange observed
09-07 12:57 10m - / -13 CR7BRV +13 / - 2 ✓ Closing fragment
09-04 08:31 40m -1 / - <...> - / -13 5 Partial capture
09-04 07:32 40m 0 / - LY3VD - / -10 2 ✓ Closing fragment
09-04 07:29 40m -1 / - 3Z100PKP - / -10 3 Partial capture
09-04 07:25 40m +5 / - AM42SDC - / - 6 Partial capture
09-04 06:44 40m +13 / - SN100PKP - / - 2 Partial capture
09-04 06:39 40m +12 / - <...> - / - 13 Partial capture
09-04 06:10 40m +8 / - SP100PKP -4 / -2 4 Partial capture
09-04 06:07 40m +6 / - SQ100PKP - / -2 2 Partial capture
09-03 19:11 80m +8 / - SQ100PKP - / -2 4 Partial capture
09-03 17:57 80m +16 / +10 SQ100PKP +9 / -4 3 Partial capture
09-03 08:31 40m -4 / - HF100PKP - / -10 10 Partial capture
09-03 08:29 40m -2 / - <...> - / - 3 Partial capture
09-03 07:49 40m +2 / - <...> - / - 2 Partial capture
09-03 07:46 40m 0 / - OH2CUB/P - / - 4 Partial capture
09-03 07:45 40m +3 / - HF100PKP - / - 3 Partial capture
09-03 06:30 40m -6 / - 3Z100PKP - / +2 2 Partial capture
09-03 06:29 40m +4 / - <...> - / - 2 Partial capture
09-02 17:09 40m +3 / - <...> - / +1 3 Partial capture
09-02 09:46 40m -6 / - SP100PKP -2 / 0 3 Partial capture
09-02 08:24 40m 0 / - <...> - / -6 3 Partial capture
09-01 10:00 40m -4 / - <...> - / -4 2 Partial capture
09-01 09:57 40m -7 / - HF100PKP - / - 2 Partial capture
09-01 09:01 40m +10 / -8 SQ100PKP -8 / - 3 Partial capture
09-01 08:56 40m +5 / - <...> - / - 9 Partial capture
08-31 18:43 80m -6 / - VK4DAD - / - 8 Partial capture
08-31 18:02 80m 0 / - EY8BL - / - 2 Partial capture
08-31 17:58 80m 0 / - <...> - / -12 2 Partial capture
08-31 14:51 20m - / - F5IXN +4 / - 2 Partial capture
08-27 20:40 80m -12 / - RI1FJL - / - 2 Partial capture
08-27 19:52 80m -11 / - RI1FJL - / - 10 Partial capture
08-27 19:30 80m -3 / - RI1FJL - / - 5 Partial capture
08-27 19:23 80m -16 / - RI1FJL - / - 5 Partial capture
08-27 19:19 80m -6 / - RI1FJL - / - 3 Partial capture
08-27 19:10 80m -2 / -6 EN35UKR -4 / +2 3 Partial capture
08-22 06:35 20m -10 / - <...> - / - 2 Partial capture
08-21 06:41 20m +21 / - <...> - / - 2 Partial capture

Recent FT8 messages decoded at SO8OO

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

40m 
UTC    dB Audio  Message
135230  -3 2351  DK0GV UT4XU KO40 (x6)
162415 +10 2518  UT4XU DK80NDS -19
184645 -11  989  UT4XU YO1BRANCUSI +04
113000  +0  347  PF40EUDXF UT4XU KO40
113015  -9  346  UT4XU PF40EUDXF -09
113030  -2  346  PF40EUDXF UT4XU R-12
120330  -5 1167  PC40EUDXF UT4XU KO40 (x4)
10m 
UTC    dB Audio  Message
125700 +14  608  UT4XU CR7BRV -13 (x2)
125930 -12 1171  UT4XU EG1PDA RR73
114315  +4  316  UT4XU EA7AKL +03 (x2)
152345 -17 2406  UT4XU CN8WK -06 (x2)
122515 -17 1009  UT4XU 7Z1BQ RR73
091445 -14 1383  UT4XU CS7BMX -09 (x2)
80m 
UTC    dB Audio  Message
180745 +10 1554  EH3ST UT4XU KO40 (x3)
180900 -16 1554  UT4XU EH3ST -14
180915 +12 1554  EH3ST UT4XU R-10
180930 -21 1554  UT4XU EH3ST RR73
180945 +11 1554  EH3ST UT4XU 73
155745 +15 2430  RI1FJZ UT4XU KO40 (x8)
20m 
UTC    dB Audio  Message
063615 +13 1067  II7MGML UT4XU KO40
063630  -3 1066  UT4XU II7MGML +08
063715 +16 1067  II7MGML UT4XU R-07 (x6)
064115 +17 2610  <...> UT4XU KO40 (x4)
145015 -10 1625  UT4XU IK2BUF -19
145145  +5 2532  UT4XU F5IXN JN23 (x2)

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.

CW

No CW receptions recorded for this callsign in the last 30 days.

Explore CW reception at SO8OO

FT8DB and SO8OO WebSDR are a hobby project maintained solo. ☕ Buy me a coffee