YB1SDL — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving YB1SDL, decoded by SO8OO in southeastern Poland. 195 FT8 messages attributed to this token as transmitter, on 80m, 20m, 10m, across 3 UTC dates in the available aggregate history. Observed between 2026-06-10 and 2026-06-24.
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 195 FT8 messages attributed to YB1SDL as the transmitting token by decoded message structure across 3 UTC dates in the available aggregate history. The largest monitored-band total was 80 m (84%), followed by 20 m (15%) and 10 m (2%). Several six-hour UTC windows tied for the largest share (84%), so no unique busiest interval is claimed. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -16 dB.
Overview
Bands
Last attributed message: 2026-06-24 20:19 UTC
Observed FT8 message patterns
- Attributed sample
- 195 messages
- Active dates
- 3 UTC dates
- Estimated median S/N
- -16 dB
- Estimated 10th-90th percentile
- -21 to -11 dB
- Recurring-pattern threshold
- Met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 102, moderate (-15 to -9 dB) 91, strong (≥ -8 dB) 2.
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 YB1SDL in decoded directed-looking exchanges:
Most frequent locator attributed to YB1SDL
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
- OI33 · 83 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 10,219 km (approx.)
- Last such locator decoded
- 2026-06-24 20:17 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 | YB1SDL S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 06-24 20:18 | 80m | -24 / - | R3WA | +6 / -5 | 3 | Partial capture |
| 06-24 20:17 | 80m | - / - | DL6NDN | +7 / - | 4 | Partial capture |
| 06-24 20:17 | 80m | - / - | OZ2JUM | +4 / - | 9 | Partial capture |
| 06-24 20:15 | 80m | -22 / -23 | I5MPN | +21 / -10 | 4 | ✓ Full exchange observed |
| 06-24 20:14 | 80m | -22 / -13 | EW6CB | +10 / -13 | 6 | ✓ Full exchange observed |
| 06-24 20:13 | 80m | - / - | DO8DL | 0 / - | 2 | Partial capture |
| 06-24 20:13 | 80m | - / -22 | IK2TPX | -1 / - | 6 | Partial capture |
| 06-24 20:12 | 80m | - / -25 | DL6II | +11 / - | 3 | Partial capture |
| 06-24 20:08 | 80m | - / -11 | LA6YEA | +4 / - | 3 | ✓ Closing fragment |
| 06-24 20:05 | 80m | - / -14 | SP3CMA | +2 / - | 6 | Partial capture |
| 06-24 20:03 | 80m | - / -10 | 2E0CIT | -3 / - | 3 | Partial capture |
| 06-24 20:03 | 80m | - / - | DL1BJL | 0 / - | 5 | Partial capture |
| 06-24 20:00 | 80m | - / -12 | SQ9BC | +6 / - | 4 | ✓ Closing fragment |
| 06-24 19:59 | 80m | - / - | IK2TPX | -2 / - | 17 | Partial capture |
| 06-24 19:59 | 80m | - / -11 | OH5LF | +4 / - | 3 | ✓ Closing fragment |
| 06-24 19:59 | 80m | - / -13 | OM3RP | +23 / - | 5 | ✓ Closing fragment |
| 06-24 19:49 | 80m | -18 / -13 | IK2SAU | +8 / -10 | 5 | ✓ Full exchange observed |
| 06-24 19:49 | 80m | - / - | DL1BJL | +1 / - | 20 | Partial capture |
| 06-24 19:49 | 80m | - / - | IK2TPX | -3 / - | 12 | Partial capture |
| 06-24 19:48 | 80m | - / -16 | 4Z5PE | -13 / - | 4 | Partial capture |
| 06-24 19:45 | 80m | - / - | IK2TPX | -12 / - | 2 | Partial capture |
| 06-24 19:43 | 80m | -20 / -2 | OH3NAQ | +1 / -10 | 5 | ✓ Full exchange observed |
| 06-24 19:40 | 80m | - / - | DL2VAH | -19 / - | 2 | Partial capture |
| 06-24 19:39 | 80m | -20 / -12 | OM1AN | +12 / -16 | 6 | ✓ Full exchange observed |
| 06-24 19:38 | 80m | -14 / -13 | UA9FKM | -24 / - | 3 | ✓ Closing observed |
| 06-24 19:38 | 80m | -16 / -11 | UR8UQ | +12 / -3 | 6 | ✓ Full exchange observed |
| 06-24 19:37 | 80m | - / - | SM5FUG | 0 / - | 2 | Partial capture |
| 06-24 19:37 | 80m | - / -16 | RY6O | -4 / - | 3 | ✓ Closing fragment |
| 06-24 19:36 | 80m | -16 / -14 | RG7M | -4 / -7 | 5 | ✓ Full exchange observed |
| 06-24 19:33 | 80m | - / - | IK2TPX | -10 / - | 8 | Partial capture |
| 06-24 19:31 | 80m | - / -7 | OH3NAQ | -2 / - | 5 | Partial capture |
| 06-24 19:30 | 80m | -18 / -11 | HA7XL | +15 / -4 | 17 | ✓ Full exchange observed |
| 06-24 19:29 | 80m | -12 / - | RC9WC | - / -7 | 2 | ✓ Closing fragment |
| 06-24 19:28 | 80m | -15 / -18 | SP9BGL | +4 / -9 | 9 | ✓ Full exchange observed |
| 06-24 19:27 | 80m | - / -17 | S52DD | -4 / - | 6 | Partial capture |
| 06-24 19:26 | 80m | -12 / -11 | UA3UBV | -5 / - | 4 | ✓ Closing observed |
| 06-24 19:25 | 80m | -16 / - | RV3V | - / 0 | 3 | ✓ Closing fragment |
| 06-24 19:24 | 80m | - / - | IK2TPX | -13 / - | 9 | Partial capture |
| 06-24 19:24 | 80m | - / -10 | OH1IB | -1 / - | 5 | ✓ Closing fragment |
| 06-24 19:23 | 80m | - / +1 | DB4MLA | +3 / - | 6 | ✓ Closing fragment |
| 06-24 19:23 | 80m | -16 / -16 | IU2LVV | +9 / -15 | 18 | ✓ Full exchange observed |
| 06-24 19:23 | 80m | -16 / -9 | R7CD | +5 / +2 | 6 | ✓ Full exchange observed |
| 06-24 19:22 | 80m | -14 / - | RA6ZA | -14 / -11 | 3 | ✓ Closing observed |
| 06-24 19:22 | 80m | - / -19 | S52DD | -4 / - | 4 | Partial capture |
| 06-24 19:22 | 80m | - / - | SP6ABD | +5 / - | 3 | Partial capture |
| 06-24 19:20 | 80m | - / - | HF5A | +8 / - | 4 | Partial capture |
| 06-24 19:20 | 80m | -14 / -17 | SV9MBH | -15 / -12 | 6 | ✓ Full exchange observed |
| 06-24 19:17 | 80m | -16 / -11 | R9SAP | -15 / -2 | 2 | Partial capture |
| 06-24 19:16 | 80m | -11 / -14 | UT5ZC | +4 / -5 | 5 | ✓ Full exchange observed |
| 06-24 19:15 | 80m | - / - | RV3V | +5 / - | 2 | Partial capture |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 201715 +3 1952 YB1SDL DL6NDN JO50 201745 +2 1053 YB1SDL OZ2JUM JO46 201745 +10 1952 YB1SDL DL6NDN JO50 201815 +5 2219 YB1SDL R3WA KO81 201815 +6 1053 YB1SDL OZ2JUM JO46 201815 +4 1952 YB1SDL DL6NDN JO50 201845 +6 2219 YB1SDL R3WA KO81 201845 +5 1053 YB1SDL OZ2JUM JO46 201845 +10 1952 YB1SDL DL6NDN JO50 201900 -24 2200 R3WA YB1SDL -05 201915 +4 1053 YB1SDL OZ2JUM JO46 (x5)
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