S50MJ — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving S50MJ, decoded by SO8OO in southeastern Poland. 36 FT8 messages attributed to this token as transmitter, on 40m, 20m, across 2 UTC dates in the available aggregate history. Observed between 2026-06-27 and 2026-09-18.
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 36 FT8 messages attributed to S50MJ as the transmitting token by decoded message structure across 2 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (89%), followed by 20 m (11%). In this small sample, the estimated median decoder S/N was +4 dB; no usual signal pattern is inferred.
Overview
Bands
Last attributed message: 2026-09-18 19:30 UTC
Observed FT8 message patterns
- Attributed sample
- 36 messages
- Active dates
- 2 UTC dates
- Estimated median S/N
- +4 dB
- Estimated 10th-90th percentile
- -13 to +8 dB
- Recurring-pattern threshold
- Not met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 2, moderate (-15 to -9 dB) 2, strong (≥ -8 dB) 32.
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).
Frequent counterpart tokens observed at SO8OO
Tokens most often paired with S50MJ in decoded directed-looking exchanges:
Most frequent locator attributed to S50MJ
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
- JN76 · 11 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 631 km (approx.)
- Last such locator decoded
- 2026-09-18 19:28 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 | S50MJ S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 09-18 19:30 | 40m | +8 / -5 | G8KHF | +4 / - | 4 | ✓ Closing observed |
| 09-18 19:28 | 40m | +4 / - | IQ0AK | - / +4 | 2 | Partial capture |
| 09-18 19:25 | 40m | +2 / -7 | F1PBZ | +3 / - | 4 | ✓ Full exchange observed |
| 09-18 19:24 | 40m | +3 / - | OH6DHM | - / +8 | 2 | ✓ Closing fragment |
| 09-18 19:21 | 40m | +4 / - | SO5WD | - / -5 | 2 | ✓ Closing fragment |
| 09-18 19:21 | 40m | +2 / -11 | S51PV | -10 / -14 | 7 | ✓ Full exchange observed |
| 09-18 19:19 | 40m | +4 / - | SQ9CXH | - / +3 | 3 | ✓ Closing fragment |
| 09-18 19:18 | 40m | +4 / -13 | YT2U | 0 / +9 | 4 | ✓ Full exchange observed |
| 09-18 19:17 | 40m | +8 / +8 | IZ4IRO | -8 / +5 | 4 | ✓ Full exchange observed |
| 09-18 19:15 | 40m | +6 / - | RX9WM | - / -13 | 2 | Partial capture |
| 09-18 19:09 | 40m | +5 / -1 | OE8PIT | -6 / +7 | 4 | ✓ Full exchange observed |
| 09-18 19:07 | 40m | +8 / - | IZ1HJU | - / -5 | 2 | Partial capture |
| 06-27 18:09 | 20m | - / - | OZ9GA | -12 / - | 4 | Partial capture |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 192315 +0 2247 S51PV S50MJ RR73 192345 +4 2247 CQ S50MJ JN76 192415 +1 2247 OH6DHM S50MJ +08 (x2) 192515 +5 2247 CQ S50MJ JN76 192530 +3 2543 S50MJ F1PBZ -07 192545 +4 2247 F1PBZ S50MJ R+15 192600 +3 2543 S50MJ F1PBZ RR73 192615 +0 2247 F1PBZ S50MJ 73 192815 +7 2247 IQ0AK S50MJ +04 (x2) 193000 +6 652 S50MJ G8KHF R-05 (x2) 193045 +8 2247 G8KHF S50MJ RR73 193100 +4 652 S50MJ G8KHF 73
UTC dB Audio Message 180815 -20 2260 CQ S50MJ JN76 a1 180830 -8 2737 S50MJ BI4XDT PM01 180845 -13 2260 CQ S50MJ JN76 180900 -9 856 S50MJ OZ9GA JO46 180915 -19 2260 RI0SP S50MJ R+14 180930 -10 856 S50MJ OZ9GA JO46 (x2) 181045 -13 2261 CQ S50MJ JN76 a1 181115 -13 857 S50MJ OZ9GA JO46
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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