EI5JTB — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving EI5JTB, decoded by SO8OO in southeastern Poland. 17 FT8 messages attributed to this token as transmitter, on 20m, across 2 UTC dates in the available aggregate history. Observed between 2026-06-18 and 2026-08-14.
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 17 FT8 messages attributed to EI5JTB 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 -10 dB; no usual signal pattern is inferred.
Overview
Observed FT8 message patterns
- Attributed sample
- 17 messages
- Active dates
- 2 UTC dates
- Estimated median S/N
- -10 dB
- S/N percentile sample
- Too small
- Recurring-pattern threshold
- Not met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 6, moderate (-15 to -9 dB) 4, strong (≥ -8 dB) 7.
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 EI5JTB in decoded directed-looking exchanges:
Most frequent locator attributed to EI5JTB
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
- IO64 · 7 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 2,010 km (approx.)
- Last such locator decoded
- 2026-08-14 15:42 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 | EI5JTB S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 09-20 08:47 | 40m | - / -14 | OH3MB | -17 / - | 3 | Partial capture |
| 09-20 08:44 | 40m | - / - | OH3MB | -18 / - | 2 | Partial capture |
| 09-20 08:41 | 40m | - / - | SP5GEO | -8 / - | 2 | Partial capture |
| 08-29 10:11 | 20m | - / - | DM4GG | +11 / - | 3 | Partial capture |
| 08-14 15:42 | 20m | -3 / - | BG7BVI | - / -8 | 3 | ✓ Closing fragment |
| 08-14 15:34 | 20m | - / -6 | UN7PNF | -12 / - | 4 | Partial capture |
| 08-14 15:33 | 20m | -18 / - | BG0FFH | - / -7 | 5 | Partial capture |
| 08-14 15:31 | 20m | -18 / - | BG2ATH | - / - | 2 | Partial capture |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 084100 -8 1455 EI5JTB SP5GEO JO90 (x2) 084430 -18 2231 EI5JTB OH3MB KP20 (x5)
UTC dB Audio Message 153430 -20 1717 BG0FFH EI5JTB R-07 153445 -16 2014 EI5JTB UN7PNF -06 (x2) 153530 -18 1717 BG0FFH EI5JTB R-07 153615 -11 2013 EI5JTB UN7PNF -07 (x2) 154030 -13 1717 3B8/SQ9UM EI5JTB R-08 154215 -1 1717 BG7BVI EI5JTB IO64 (x3) 100800 -12 1628 EI5JTB DL5MKR R-01 100830 -5 2330 EI5JTB DO1TSA JO31 101100 +13 2796 EI5JTB DM4GG JO40 (x3)
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