EA7JSA — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving EA7JSA, decoded by SO8OO in southeastern Poland. 286 FT8 messages attributed to this token as transmitter, on 40m, 20m, across 14 UTC dates in the available aggregate history. Observed between 2026-07-03 and 2026-09-05.
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 286 FT8 messages attributed to EA7JSA as the transmitting token by decoded message structure across 14 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (65%), followed by 40 m (35%). Several six-hour UTC windows tied for the largest share (99%), so no unique busiest interval is claimed. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -11 dB.
Overview
Bands
Last attributed message: 2026-09-05 03:59 UTC
Observed FT8 message patterns
- Attributed sample
- 286 messages
- Active dates
- 14 UTC dates
- Estimated median S/N
- -11 dB
- Estimated 10th-90th percentile
- -19 to -5 dB
- Recurring-pattern threshold
- Met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 66, moderate (-15 to -9 dB) 125, strong (≥ -8 dB) 95.
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 EA7JSA in decoded directed-looking exchanges:
Attributed messages by UTC hour
Rolling 90-day UTC chart window. Counts follow decoded message structure: the first token for CQ, or the second token in a directed-looking message.
Most frequent locator attributed to EA7JSA
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
- IM77 · 174 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 2,538 km (approx.)
- Last such locator decoded
- 2026-09-05 03:59 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 | EA7JSA S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 09-05 03:55 | 40m | - / - | RV6F | -14 / - | 5 | Partial capture |
| 09-05 03:53 | 40m | -20 / -9 | SV5BYP | +1 / - | 3 | ✓ Closing observed |
| 09-05 03:02 | 40m | -8 / - | WO7V | - / - | 4 | Partial capture |
| 09-05 02:58 | 40m | -7 / - | WO7V | - / - | 2 | Partial capture |
| 09-05 02:57 | 40m | -8 / - | NE9U | - / -12 | 6 | ✓ Closing fragment |
| 09-05 02:51 | 40m | -8 / - | OZ1LTQ | - / - | 2 | Partial capture |
| 09-05 02:45 | 40m | -11 / - | OH1RM | - / -19 | 4 | ✓ Closing fragment |
| 08-29 17:00 | 20m | -8 / -1 | LX7I | +9 / - | 2 | Partial capture |
| 08-29 16:59 | 20m | -17 / -13 | DL4DD | -2 / - | 3 | Partial capture |
| 08-28 01:53 | 40m | -6 / - | EA4DZR | - / -15 | 3 | ✓ Closing fragment |
| 08-28 01:48 | 40m | -9 / - | W4DXM | -14 / -22 | 5 | ✓ Closing observed |
| 08-28 01:44 | 40m | -10 / -5 | EA3AAY | -10 / -8 | 6 | ✓ Full exchange observed |
| 08-28 01:42 | 40m | -6 / - | KD1J | -10 / -22 | 5 | ✓ Closing observed |
| 08-28 01:36 | 40m | -7 / -7 | CU6AB | -10 / - | 3 | ✓ Closing observed |
| 08-28 01:36 | 40m | -5 / - | TA3NK | -4 / -22 | 14 | Partial capture |
| 08-28 01:31 | 40m | -7 / +2 | EA7R | +5 / -19 | 6 | ✓ Full exchange observed |
| 08-28 01:28 | 40m | -6 / - | <...> | - / -17 | 2 | Partial capture |
| 08-28 01:24 | 40m | -9 / - | LZ2CC | - / -19 | 7 | ✓ Closing fragment |
| 08-10 04:26 | 40m | - / -9 | DL5MKR | -18 / - | 4 | Partial capture |
| 08-10 04:16 | 40m | - / -13 | DH5BM | -16 / - | 11 | Partial capture |
| 08-05 01:41 | 40m | -17 / - | W4CNA | - / -9 | 3 | ✓ Closing fragment |
| 08-05 01:40 | 40m | -20 / - | XQ3SK | - / -19 | 2 | Partial capture |
| 08-02 00:53 | 20m | -17 / - | W7ZR | - / -13 | 3 | Partial capture |
| 08-02 00:49 | 20m | -17 / - | US5HL | - / -10 | 2 | Partial capture |
| 08-02 00:47 | 20m | -16 / - | EA3GEH | - / -14 | 2 | Partial capture |
| 08-02 00:43 | 20m | -20 / -7 | EC5M | +1 / -11 | 5 | ✓ Full exchange observed |
| 08-02 00:42 | 20m | -18 / -13 | CT7AUT | -12 / -14 | 8 | ✓ Full exchange observed |
| 08-02 00:37 | 20m | -18 / -15 | EB4DMH | -17 / -4 | 6 | Partial capture |
| 08-02 00:36 | 20m | -16 / - | XE1TZP | - / - | 2 | Partial capture |
| 08-01 00:51 | 20m | -10 / - | DL1NDG | - / -18 | 2 | ✓ Closing fragment |
| 08-01 00:45 | 20m | -12 / - | NV8B | - / - | 2 | Partial capture |
| 08-01 00:43 | 20m | -16 / - | VO1ACZ | - / -24 | 3 | Partial capture |
| 08-01 00:39 | 20m | -14 / - | RW9MC | - / - | 2 | Partial capture |
| 08-01 00:24 | 20m | -14 / - | DK8HC/P | - / -14 | 3 | ✓ Closing fragment |
| 08-01 00:22 | 20m | -16 / - | 9A2TN | - / -11 | 2 | ✓ Closing fragment |
| 07-29 02:16 | 20m | -14 / - | US5HL | - / - | 3 | Partial capture |
| 07-27 01:34 | 20m | -10 / - | OH8JEP | - / - | 2 | ✓ Closing fragment |
| 07-27 01:33 | 20m | -6 / - | SP9DAT | - / -12 | 2 | ✓ Closing fragment |
| 07-27 01:32 | 20m | -6 / - | EX8ABR | - / -22 | 3 | ✓ Closing fragment |
| 07-27 01:27 | 20m | -7 / - | TN8GD | - / -21 | 6 | ✓ Closing fragment |
| 07-27 01:16 | 20m | -6 / - | ND9M | - / - | 2 | Partial capture |
| 07-27 01:06 | 20m | +1 / - | TN8GD | - / - | 12 | Partial capture |
| 07-27 01:01 | 20m | -10 / - | EA1AOC | - / -16 | 2 | ✓ Closing fragment |
| 07-27 00:57 | 20m | -13 / - | 5Z4VJ | - / -14 | 4 | ✓ Closing fragment |
| 07-27 00:53 | 20m | -12 / - | XQ3SK | - / -17 | 4 | ✓ Closing fragment |
| 07-27 00:48 | 20m | -13 / - | 7Z1BQ | -24 / -15 | 5 | ✓ Closing observed |
| 07-27 00:43 | 40m | - / -10 | R5AV | -9 / - | 3 | ✓ Closing fragment |
| 07-27 00:38 | 40m | - / - | EB1LA | -16 / - | 4 | Partial capture |
| 07-19 23:04 | 40m | - / -14 | DL9KM | -4 / - | 3 | ✓ Closing fragment |
| 07-19 23:02 | 40m | -18 / - | 2D0OMN | -19 / -8 | 2 | Partial capture |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 030430 -7 1105 WO7V EA7JSA IM77 030500 -9 1105 CQ EA7JSA IM77 030600 -15 955 TI2VLM EA7JSA IM77 030700 -11 955 W4IHQ EA7JSA -20 035315 +3 730 EA7JSA SV5BYP -09 (x2) 035430 -20 1292 SV5BYP EA7JSA 73 035500 -17 1292 CQ EA7JSA IM77 (x2) 035545 -15 1255 EA7JSA RV6F LN14 (x5) 035900 -9 1291 Z33F EA7JSA IM77
UTC dB Audio Message 005330 -19 1385 W7ZR EA7JSA -13 (x2) 005600 -16 1383 IW5ALZ EA7JSA -23 005730 -17 1381 R9HAK EA7JSA IM77 005800 -15 1381 CQ EA7JSA IM77 005900 -17 1380 OH1LA EA7JSA -12 010130 -19 1378 CQ EA7JSA IM77 (x2) 021930 -5 857 EA7JSA XQ1KK RR73 165900 -17 1170 DL4DD EA7JSA IM77 165915 -4 2796 EA7JSA DL4DD -13 (x2) 170000 -8 1167 LX7I EA7JSA IM77 170045 +9 1934 EA7JSA LX7I -01 170230 -5 1162 DL4DD EA7JSA -15
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