ZL3XA — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving ZL3XA, decoded by SO8OO in southeastern Poland. 39 FT8 messages attributed to this token as transmitter, on 20m, across 1 UTC dates in the available aggregate history. Last observed 2026-06-19.
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 39 FT8 messages attributed to ZL3XA as the transmitting token by decoded message structure across 1 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 -5 dB; no usual signal pattern is inferred.
Overview
Observed FT8 message patterns
- Attributed sample
- 39 messages
- Active dates
- 1 UTC dates
- Estimated median S/N
- -5 dB
- Estimated 10th-90th percentile
- -18 to -2 dB
- Recurring-pattern threshold
- Not met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 12, moderate (-15 to -9 dB) 2, strong (≥ -8 dB) 25.
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 ZL3XA in decoded directed-looking exchanges:
Most frequent locator attributed to ZL3XA
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
- RE66 · 19 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 17,723 km (approx.)
- Last such locator decoded
- 2026-06-19 03:24 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 | ZL3XA S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 08-09 08:37 | 20m | - / -18 | IX1HPN | -10 / - | 5 | ✓ Closing fragment |
| 08-09 07:43 | 20m | - / - | IK2TPX | -6 / - | 4 | Partial capture |
| 08-09 06:56 | 20m | - / - | F6GCP | -10 / - | 2 | Partial capture |
| 08-09 06:51 | 20m | - / -12 | EA3ADX | -18 / - | 2 | Partial capture |
| 08-09 06:50 | 20m | - / -19 | DL4DBM | -1 / - | 3 | ✓ Closing fragment |
| 08-09 06:16 | 20m | - / -19 | EA3CUU | -6 / - | 2 | ✓ Closing fragment |
| 08-09 06:07 | 20m | - / +1 | F6EKI | -20 / - | 2 | ✓ Closing fragment |
| 08-09 05:14 | 20m | - / - | A71XX | +9 / - | 2 | ✓ Closing fragment |
| 08-09 04:48 | 20m | - / -10 | RV6FT | -5 / - | 9 | ✓ Closing fragment |
| 07-28 10:00 | 20m | - / - | M0MLS | -11 / - | 3 | Partial capture |
| 07-28 09:48 | 20m | - / -15 | F1PBZ | +6 / - | 2 | Partial capture |
| 07-18 03:28 | 40m | - / - | PA3BUD | +2 / - | 6 | Partial capture |
| 07-10 05:52 | 20m | - / -16 | EA3RT | -11 / - | 3 | ✓ Closing fragment |
| 06-27 06:33 | 20m | - / -15 | EC5EA | -11 / - | 2 | Partial capture |
| 06-27 06:33 | 20m | - / - | EA5GX | +1 / - | 8 | Partial capture |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 065215 -18 2343 ZL3XA EA3ADX -12 065615 -9 690 ZL3XA F6GCP JN18 (x2) 071045 -21 2192 ZL3XA F5DAN JN18 073145 -3 2934 ZL3XA LZ3TA KN21 074315 -7 2753 ZL3XA IK2TPX JN45 (x4) 075845 -13 281 ZL3XA IU2RGL JN45 083715 -17 1931 ZL3XA IX1HPN JN35 (x5)
UTC dB Audio Message 032800 -3 2905 ZL3XA PA3BUD JO21 (x6)
FT8DB and SO8OO WebSDR are a hobby project maintained solo. ☕ Buy me a coffee