SP5SF — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving SP5SF, decoded by SO8OO in southeastern Poland. 45 FT8 messages attributed to this token as transmitter, on 40m, across 1 UTC dates in the available aggregate history. Last observed 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 45 FT8 messages attributed to SP5SF as the transmitting token by decoded message structure across 1 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (100%). In this small sample, the estimated median decoder S/N was -12 dB; no usual signal pattern is inferred.
Overview
Observed FT8 message patterns
- Attributed sample
- 45 messages
- Active dates
- 1 UTC dates
- Estimated median S/N
- -12 dB
- Estimated 10th-90th percentile
- -18 to -3 dB
- Recurring-pattern threshold
- Not met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 16, moderate (-15 to -9 dB) 15, strong (≥ -8 dB) 14.
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 SP5SF in decoded directed-looking exchanges:
Most frequent locator attributed to SP5SF
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
- KO02 · 22 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 290 km (approx.)
- Last such locator decoded
- 2026-09-19 12:47 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 | SP5SF S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 09-19 12:47 | 40m | -14 / - | DK1XAM | - / -8 | 2 | ✓ Closing fragment |
| 09-19 12:45 | 40m | -8 / - | R2EA/P | - / - | 3 | Partial capture |
| 09-19 12:42 | 40m | -13 / -12 | DJ0MAB | -16 / 0 | 7 | ✓ Full exchange observed |
| 09-19 12:40 | 40m | -15 / -12 | 9A4ZM | 0 / 0 | 6 | ✓ Full exchange observed |
| 09-19 12:09 | 40m | -12 / - | DL7EDU | - / - | 2 | Partial capture |
| 09-19 10:43 | 40m | -18 / -3 | LY2EW | -15 / - | 4 | ✓ Closing observed |
| 09-19 10:41 | 40m | -17 / -9 | PA3CPS | -19 / -8 | 6 | ✓ Full exchange observed |
| 09-19 10:39 | 40m | -18 / -4 | SP2KW | -21 / -1 | 5 | ✓ Full exchange observed |
| 09-19 10:27 | 40m | -8 / -5 | UX7QV | -1 / - | 6 | ✓ Closing observed |
| 09-19 10:22 | 40m | -8 / 0 | UT4PA | +5 / +8 | 6 | ✓ Full exchange observed |
| 09-19 10:20 | 40m | -6 / - | IR4DCI | - / - | 3 | Partial capture |
| 08-26 17:05 | 20m | - / -7 | IK2ZJR | +15 / - | 5 | ✓ Closing fragment |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 124215 -16 2228 SP5SF DJ0MAB JN49 (x2) 124300 -12 2227 DJ0MAB SP5SF +00 124315 -17 2228 SP5SF DJ0MAB R-12 124330 -17 2227 DJ0MAB SP5SF RR73 124345 -16 2228 SP5SF DJ0MAB 73 124400 -11 2227 DJ0MAB SP5SF 73 124415 -22 1386 SP5SF PG5FRL JO22 124430 -18 2227 CQ SP5SF KO02 124500 -6 2617 R2EA/P SP5SF (x3) 124700 -7 2617 CQ SP5SF KO02 124730 -17 2386 DK1XAM SP5SF -08 (x2)
UTC dB Audio Message 170530 +19 2530 SP5SF IK2ZJR JN45 (x5)
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