YB1ALT — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving YB1ALT, decoded by SO8OO in southeastern Poland. 23 FT8 messages attributed to this token as transmitter, on 20m, across 2 UTC dates in the available aggregate history. Observed between 2026-06-09 and 2026-06-16.
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 23 FT8 messages attributed to YB1ALT as the transmitting token by decoded message structure across 2 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (100%). In this small sample, the estimated median decoder S/N was -11 dB; no usual signal pattern is inferred.
Overview
Observed FT8 message patterns
- Attributed sample
- 23 messages
- Active dates
- 2 UTC dates
- Estimated median S/N
- -11 dB
- Estimated 10th-90th percentile
- -19 to -8 dB
- Recurring-pattern threshold
- Not met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 6, moderate (-15 to -9 dB) 14, strong (≥ -8 dB) 3.
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. The sample does not meet the threshold for a recurring time or signal-pattern claim (20 attributed messages, three UTC dates and five distinct 15-minute windows).
Most frequent locator attributed to YB1ALT
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 · 10 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 10,219 km (approx.)
- Last such locator decoded
- 2026-06-16 13:31 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 | YB1ALT S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 08-10 13:37 | 20m | - / -17 | DL6KA | -10 / - | 2 | Partial capture |
| 08-10 13:34 | 20m | - / -8 | UT4VL | -19 / - | 5 | Partial capture |
| 08-10 13:33 | 20m | - / -17 | DL6KA | -5 / - | 2 | Partial capture |
| 08-09 16:36 | 20m | - / - | F4MXU | -18 / - | 2 | Partial capture |
| 08-09 16:36 | 20m | - / - | IK5AUL | -14 / - | 2 | Partial capture |
| 08-09 16:31 | 20m | - / - | IK5AUL | -14 / - | 2 | Partial capture |
| 08-09 16:31 | 20m | - / - | EA5TE | -14 / - | 3 | Partial capture |
| 08-09 16:08 | 20m | - / - | DL1R | -6 / - | 7 | Partial capture |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 163600 -21 1337 YB1ALT F4MXU JN25 (x2) 163700 -12 1966 YB1ALT IK5AUL JN53 133300 -19 2207 YB1ALT RW3QW -19 133300 -6 629 YB1ALT DL6KA -17 (x2) 133400 -11 2495 YB1ALT UT9EO KN78 133400 -20 1556 YB1ALT UT4VL -08 (x5) 133700 -10 629 YB1ALT DL6KA -17 (x2) 142945 -7 820 YB1ALT F4LHR/P +04
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