YO4DWD — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving YO4DWD, decoded by SO8OO in southeastern Poland. 1,734 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, 10m, across 43 UTC dates in the available aggregate history. Observed between 2026-06-07 and 2026-09-19.
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 1,734 FT8 messages attributed to YO4DWD as the transmitting token by decoded message structure across 43 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (77%), followed by 80 m (14%) and 40 m (6%). Most decodes (85%) fell within the six-hour window 17:00-23:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -15 dB.
Overview
Bands
Last attributed message: 2026-09-19 20:09 UTC
Observed FT8 message patterns
- Attributed sample
- 1,734 messages
- Active dates
- 43 UTC dates
- Estimated median S/N
- -15 dB
- Estimated 10th-90th percentile
- -22 to -6 dB
- Recurring-pattern threshold
- Met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 856, moderate (-15 to -9 dB) 574, strong (≥ -8 dB) 304.
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 YO4DWD 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 YO4DWD
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
- KN43 · 429 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 902 km (approx.)
- Last such locator decoded
- 2026-09-19 20:08 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 UTC | Band | YO4DWD S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 09-19 21:30 | 40m | - / -13 | UF1A | -3 / - | 2 | ✓ Closing fragment |
| 09-19 21:17 | 40m | - / -5 | II6IALU | 0 / - | 2 | Partial capture |
| 09-19 20:09 | 80m | -2 / - | UF4S | -6 / -22 | 3 | ✓ Closing observed |
| 09-18 20:54 | 80m | - / +3 | YO5USA | +2 / - | 2 | ✓ Closing fragment |
| 09-17 20:47 | 80m | -3 / -5 | RA6OY | +7 / -7 | 6 | ✓ Full exchange observed |
| 09-17 20:47 | 80m | -1 / +1 | YO6FNF | +8 / -3 | 5 | ✓ Full exchange observed |
| 09-17 20:39 | 80m | -4 / - | SN100PKP | - / -18 | 9 | Partial capture |
| 09-17 20:34 | 80m | - / -8 | R7KEO | -10 / - | 2 | ✓ Closing fragment |
| 09-17 20:32 | 80m | -12 / - | SP100PKP | - / -20 | 2 | Partial capture |
| 09-17 20:21 | 40m | -18 / - | 9K2WA | - / -10 | 2 | ✓ Closing fragment |
| 09-17 10:13 | 40m | - / -16 | HF100PKP | -15 / - | 2 | Partial capture |
| 09-16 22:48 | 80m | -4 / -4 | IZ8WGR | -14 / -13 | 4 | ✓ Full exchange observed |
| 09-16 22:47 | 80m | -4 / -13 | DH1KJ | -18 / -23 | 3 | ✓ Full exchange observed |
| 09-16 22:45 | 80m | -11 / -12 | RU7J | -9 / -12 | 5 | ✓ Full exchange observed |
| 09-16 22:42 | 80m | 0 / -12 | SP1NL | +8 / -23 | 4 | ✓ Full exchange observed |
| 09-16 22:41 | 80m | -1 / +4 | YO3YV | +12 / +2 | 3 | ✓ Full exchange observed |
| 09-16 22:39 | 80m | - / -15 | OK1HEH | -3 / - | 3 | ✓ Closing fragment |
| 09-16 22:37 | 80m | - / - | EA1IOK | -12 / - | 5 | Partial capture |
| 09-16 22:36 | 80m | -12 / -12 | DF2RG | -5 / - | 3 | ✓ Closing observed |
| 09-16 22:29 | 80m | -10 / - | SV5ADM | -11 / - | 2 | ✓ Closing observed |
| 09-16 22:27 | 80m | -14 / - | IT9RDG | - / -16 | 4 | ✓ Closing fragment |
| 09-16 22:26 | 80m | -14 / - | I3LID | - / -16 | 3 | ✓ Closing fragment |
| 09-16 22:25 | 80m | - / - | EA3HMM | -14 / - | 3 | Partial capture |
| 09-16 22:24 | 80m | -15 / -5 | SP9TBT | +6 / -12 | 5 | ✓ Full exchange observed |
| 09-16 22:23 | 80m | -21 / -22 | IQ4JO | -8 / - | 4 | ✓ Closing observed |
| 09-16 22:20 | 80m | -6 / - | SP100PKP | - / -10 | 2 | Partial capture |
| 09-16 22:20 | 80m | -8 / -9 | SQ5BPF | +8 / -13 | 5 | ✓ Full exchange observed |
| 09-16 22:17 | 80m | -18 / -16 | 4L7T | -3 / -16 | 5 | Partial capture |
| 09-16 22:15 | 80m | -10 / +4 | HA5UA | +10 / -5 | 6 | ✓ Full exchange observed |
| 09-16 22:14 | 80m | -6 / -11 | 5B4AMM | +2 / -6 | 4 | ✓ Full exchange observed |
| 09-16 21:34 | 40m | - / -10 | HZ1TT | -6 / - | 2 | ✓ Closing fragment |
| 09-16 21:16 | 80m | -8 / - | 4O4DB | - / -21 | 2 | Partial capture |
| 09-16 21:13 | 80m | -8 / - | SN100PKP | - / -22 | 3 | Partial capture |
| 09-16 21:09 | 80m | - / -13 | R3PLN | -5 / - | 2 | ✓ Closing fragment |
| 09-16 20:55 | 80m | - / -11 | SV1DKR | -11 / - | 2 | ✓ Closing fragment |
| 09-16 20:30 | 80m | -10 / - | OL900JAR | - / -16 | 2 | Partial capture |
| 09-16 20:29 | 80m | -22 / -8 | 4O4DB | 0 / -18 | 3 | Partial capture |
| 09-16 20:29 | 80m | -12 / 0 | UT5EPP | +18 / - | 4 | ✓ Closing observed |
| 09-16 20:24 | 80m | -11 / -5 | RY3PAG | -21 / -20 | 3 | ✓ Full exchange observed |
| 09-16 20:23 | 80m | -10 / -14 | 9A5E | -4 / -11 | 4 | ✓ Full exchange observed |
| 09-16 20:22 | 80m | -24 / -3 | YO4NF | +7 / - | 3 | ✓ Closing observed |
| 09-16 20:18 | 80m | -4 / +1 | UT1US | -6 / -3 | 3 | ✓ Full exchange observed |
| 09-15 07:09 | 40m | - / +5 | LZ2II | -3 / - | 2 | ✓ Closing fragment |
| 09-15 07:07 | 40m | - / -4 | YO9FDG | -6 / - | 3 | ✓ Closing fragment |
| 09-14 16:27 | 40m | - / -13 | JY5IB | -22 / - | 2 | ✓ Closing fragment |
| 09-12 20:51 | 40m | -23 / - | LB5WB | - / -15 | 2 | Partial capture |
| 09-10 20:20 | 80m | - / -11 | 9A3AUH | +6 / - | 4 | ✓ Closing fragment |
| 09-10 20:18 | 80m | -6 / -17 | PI4DX | +1 / -16 | 5 | ✓ Full exchange observed |
| 09-10 20:15 | 80m | -5 / -7 | YU7AS | +11 / -5 | 4 | ✓ Full exchange observed |
| 09-10 20:15 | 80m | -7 / - | YO6BGT | +4 / - | 3 | ✓ Closing observed |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 213430 -7 1729 YO4DWD HZ1TT 73 214730 -16 1458 YO4DWD C31KC 73 214830 -14 2533 YO4DWD IC8TEM R-06 101300 -14 1427 YO4DWD HF100PKP R-16 (x2) 201945 -24 1634 R3UCC/QRP YO4DWD -11 202000 -8 1911 YO4DWD II6IGTO R-07 202115 -21 1634 9K2WA YO4DWD -10 (x2) 201745 -7 1057 YO4DWD II4IANT R-05 211745 -5 1657 YO4DWD SP100PKP R-07 211745 +0 2077 YO4DWD II6IALU R-05 (x2) 213030 -3 788 YO4DWD UF1A R-13 (x2)
UTC dB Audio Message 204930 +5 1416 YO4DWD RA6OY 73 205500 -5 607 YO4DWD II9IAGM R-10 204800 +5 1673 YO4DWD II6IALU R-19 205045 -11 1755 RL2F YO4DWD -24 205415 +5 1620 YO4DWD YO5USA R+03 (x2) 211915 -5 1965 RD9M/3 YO4DWD -09 212030 -4 1198 YO4DWD RR73; YO3GNF <...> -08 200745 -10 1747 SN40KZE YO4DWD -13 200815 -4 1748 CQ YO4DWD KN43 200915 -1 1748 UF4S YO4DWD -22 200930 -11 1749 YO4DWD PC2J JO22 200945 -2 1748 UF4S YO4DWD RR73 201000 -6 1087 YO4DWD UF4S 73 210700 +3 1876 YO4DWD 9A60CBM R-12
UTC dB Audio Message 222515 -14 1293 YO4DWD SP9TBT R-05
UTC dB Audio Message 213800 -14 1523 KE4NVI YO4DWD -17 (x2) 213930 -18 1523 KB1EFS YO4DWD -18 214300 -15 1611 LU5AKF YO4DWD -22 214530 -10 1611 M5LOW YO4DWD -15 214600 -10 1611 CQ YO4DWD KN43 214815 -17 1644 JE1LET YO4DWD -17 214845 -7 1644 CQ YO4DWD KN43 215015 -10 880 YO4DWD LU8VLE 73 215115 -11 1644 CU2JX YO4DWD -21 215315 -11 1644 HK4LGH YO4DWD -18 (x2) 215445 -13 1644 PP7GB YO4DWD -08 215615 -7 1662 HK4LGH YO4DWD -15 (x2)
UTC dB Audio Message 090445 -9 2317 YO4DWD IZ0MIO 73 090815 -5 1944 YO4DWD I1RJP R-08 (x2) 081545 -6 2455 YO4DWD 5P1KZX R+13 (x2) 083600 -12 1840 YO4DWD IU8ADS R-05 (x3) 084700 -18 1434 YO4DWD R3KMI R-08 (x3) 084845 -24 1840 EX8CO YO4DWD -21 101900 -12 1826 YO4DWD I5HLK R-03 103630 -18 1833 YO4DWD DL1FAM R-06 (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.
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