OT8B — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving OT8B, decoded by SO8OO in southeastern Poland. 58 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, 10m, across 6 UTC dates in the available aggregate history. Observed between 2026-06-20 and 2026-09-06.
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 58 FT8 messages attributed to OT8B as the transmitting token by decoded message structure across 6 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (66%), followed by 10 m (16%) and 80 m (14%). Most decodes (100%) fell within the six-hour window 01:00-07:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -14 dB.
Overview
Bands
Last attributed message: 2026-09-06 05:09 UTC
Observed FT8 message patterns
- Attributed sample
- 58 messages
- Active dates
- 6 UTC dates
- Estimated median S/N
- -14 dB
- Estimated 10th-90th percentile
- -22 to -4 dB
- Recurring-pattern threshold
- Met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 25, moderate (-15 to -9 dB) 13, strong (≥ -8 dB) 20.
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 OT8B 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 OT8B
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
- JO21 · 37 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 1,192 km (approx.)
- Last such locator decoded
- 2026-09-06 05:09 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 | OT8B S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 09-06 05:01 | 40m | -5 / - | T77NC | - / - | 15 | Partial capture |
| 09-06 04:56 | 40m | -4 / - | T77NC | - / - | 2 | Partial capture |
| 07-03 06:46 | 10m | - / +1 | SX0W | +2 / - | 2 | ✓ Closing fragment |
| 06-30 06:48 | 10m | -11 / - | 7Q3WS | - / -16 | 9 | ✓ Closing fragment |
| 06-28 03:18 | 80m | -22 / -10 | EA1IOK | -5 / - | 4 | ✓ Closing observed |
| 06-28 03:16 | 80m | -18 / -15 | IQ0VT | +6 / +4 | 5 | ✓ Full exchange observed |
| 06-28 03:14 | 80m | -16 / - | <...> | - / - | 5 | Partial capture |
| 06-28 02:12 | 40m | -10 / - | OA4ENG | - / -10 | 3 | ✓ Closing fragment |
| 06-28 01:15 | 40m | -19 / - | RA4FUT | - / -12 | 9 | Partial capture |
| 06-28 01:11 | 40m | -18 / - | RA4FUT | -17 / -12 | 3 | Partial capture |
| 06-23 04:55 | 20m | -18 / - | TA1GO | - / - | 3 | Partial capture |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 050115 -5 1022 T77NC OT8B JO21 (x15)
UTC dB Audio Message 064815 -17 1933 7Q3WS OT8B JO21 (x9) 064600 +3 748 OT8B SX0W +01 (x2)
UTC dB Audio Message 031400 -15 1994 <...> OT8B JO21 (x5) 031645 +4 2010 OT8B IQ0VT -15 (x2) 031730 -21 1893 IQ0VT OT8B R+04 031745 +6 2011 OT8B IQ0VT RR73 031800 -16 1894 IQ0VT OT8B 73 031815 -5 615 OT8B EA1IOK IN62 (x2) 031900 -22 1895 EA1IOK OT8B RR73 031915 -4 615 OT8B EA1IOK 73
UTC dB Audio Message 045530 -19 1344 TA1GO OT8B JO21 (x3)
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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