EA5CAL — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving EA5CAL, decoded by SO8OO in southeastern Poland. 27 FT8 messages attributed to this token as transmitter, on 40m, 20m, 10m, across 5 UTC dates in the available aggregate history. Observed between 2026-06-07 and 2026-09-09.
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 27 FT8 messages attributed to EA5CAL as the transmitting token by decoded message structure across 5 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (89%), followed by 10 m (7%) and 40 m (4%). Several six-hour UTC windows tied for the largest share (59%), so no unique busiest interval is claimed. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -14 dB.
Overview
Bands
Last attributed message: 2026-09-09 18:01 UTC
Observed FT8 message patterns
- Attributed sample
- 27 messages
- Active dates
- 5 UTC dates
- Estimated median S/N
- -14 dB
- Estimated 10th-90th percentile
- -24 to -12 dB
- Recurring-pattern threshold
- Met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 11, moderate (-15 to -9 dB) 15, strong (≥ -8 dB) 1.
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.
Frequent counterpart tokens observed at SO8OO
Tokens most often paired with EA5CAL in decoded directed-looking exchanges:
Most frequent locator attributed to EA5CAL
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
- IM98 · 14 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 2,203 km (approx.)
- Last such locator decoded
- 2026-09-09 18:01 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 | EA5CAL S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 09-09 18:02 | 40m | - / - | HA5KN | +2 / - | 10 | Partial capture |
| 09-09 18:00 | 40m | - / -19 | RU3QR | -2 / - | 8 | Partial capture |
| 07-04 06:46 | 20m | - / -6 | F1ODM | -15 / - | 3 | ✓ Closing fragment |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 180300 +1 1608 EA5CAL RU3QR -19 180300 +1 2658 EA5CAL HA5KN JN97 180330 -5 1608 EA5CAL RU3QR -19 180330 +3 2658 EA5CAL HA5KN JN97 180400 -1 1608 EA5CAL RU3QR -19 180400 +2 2658 EA5CAL HA5KN JN97 180430 -2 1608 EA5CAL RU3QR -19 180430 +4 2658 EA5CAL HA5KN JN97 180500 -5 1608 EA5CAL RU3QR -19 180500 +2 2656 EA5CAL HA5KN JN97 (x2) 180600 +0 1608 EA5CAL RU3QR -19 180600 +1 2656 EA5CAL HA5KN JN97 (x3)
UTC dB Audio Message 064600 -13 1735 EA5CAL F1ODM -06 (x3) 074915 -24 1855 CQ EA5CAL IM98
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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