EA3MM — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving EA3MM, decoded by SO8OO in southeastern Poland. 11 FT8 messages attributed to this token as transmitter, on 20m, across 2 UTC dates in the available aggregate history. Observed between 2026-08-29 and 2026-08-30.
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 11 FT8 messages attributed to EA3MM 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 -7 dB; no usual signal pattern is inferred.
Overview
Observed FT8 message patterns
- Attributed sample
- 11 messages
- Active dates
- 2 UTC dates
- Estimated median S/N
- -7 dB
- S/N percentile sample
- Too small
- Recurring-pattern threshold
- Not met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 0, moderate (-15 to -9 dB) 3, strong (≥ -8 dB) 8.
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 EA3MM in decoded directed-looking exchanges:
Most frequent locator attributed to EA3MM
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
- JN11 · 6 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 1,727 km (approx.)
- Last such locator decoded
- 2026-08-30 17:20 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 | EA3MM S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 08-30 17:19 | 20m | +16 / - | 4X5EF | - / - | 3 | Partial capture |
| 08-29 08:02 | 20m | - / -10 | RA9ACA | -7 / - | 3 | Partial capture |
| 08-29 08:00 | 20m | -6 / - | <...> | - / -5 | 2 | Partial capture |
| 08-29 07:48 | 20m | -9 / - | UN7IV | -13 / - | 2 | ✓ Closing observed |
| 08-29 07:32 | 20m | -6 / 0 | RD3FY | -13 / -3 | 3 | ✓ Full exchange observed |
| 08-29 07:27 | 20m | -11 / - | VK2AAI | - / -23 | 3 | Partial capture |
| 08-05 19:09 | 20m | - / - | GI4TMB | -3 / - | 10 | Partial capture |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 072845 -8 1809 VK2AAI EA3MM R-23 073245 -7 2732 RD3FY EA3MM -03 073300 -13 2732 EA3MM RD3FY R+00 073315 -4 2732 RD3FY EA3MM RR73 073415 -8 2483 EA3MM R5BM/M -10 074800 -13 2122 EA3MM UN7IV RR73 074815 -9 2122 UN7IV EA3MM 73 080030 -8 424 <...> EA3MM JN11 (x2) 080215 -5 1645 EA3MM RA9ACA -10 (x3) 171930 +16 1085 4X5EF EA3MM JN11 (x3)
UTC dB Audio Message 075715 -24 1736 EA3MM IW8PQ RR73
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.
FT8DB and SO8OO WebSDR are a hobby project maintained solo. ☕ Buy me a coffee