F4LDK — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving F4LDK, decoded by SO8OO in southeastern Poland. 21 FT8 messages attributed to this token as transmitter, on 40m, across 1 UTC dates in the available aggregate history. Last observed 2026-09-17.
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 21 FT8 messages attributed to F4LDK as the transmitting token by decoded message structure across 1 UTC dates in the available aggregate history. The largest monitored-band total was 40 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
- 21 messages
- Active dates
- 1 UTC dates
- Estimated median S/N
- -5 dB
- Estimated 10th-90th percentile
- -10 to -1 dB
- Recurring-pattern threshold
- Not met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 0, moderate (-15 to -9 dB) 4, strong (≥ -8 dB) 17.
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 F4LDK in decoded directed-looking exchanges:
Most frequent locator attributed to F4LDK
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
- JN09 · 3 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 1,491 km (approx.)
- Last such locator decoded
- 2026-09-17 21:49 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 | F4LDK S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 09-17 21:57 | 40m | -5 / +5 | EB3JT | -16 / 0 | 5 | ✓ Full exchange observed |
| 09-17 21:56 | 40m | -6 / - | BH4ECL | - / -18 | 2 | ✓ Closing fragment |
| 09-17 21:54 | 40m | -3 / - | YB2TTM | - / -10 | 3 | ✓ Closing fragment |
| 09-17 21:53 | 40m | -4 / -5 | IU8RFW | +4 / -7 | 4 | ✓ Full exchange observed |
| 09-17 21:52 | 40m | -4 / - | YO4NF | - / -7 | 2 | ✓ Closing fragment |
| 09-17 21:51 | 40m | -6 / - | BG7BVP | - / -12 | 2 | ✓ Closing fragment |
| 09-17 21:46 | 40m | -4 / - | BI8AWT | - / - | 2 | Partial capture |
| 09-17 21:43 | 40m | +1 / -8 | DL9KM | -13 / -13 | 6 | ✓ Full exchange observed |
| 09-17 21:43 | 40m | -10 / - | SP9JCN | - / -6 | 2 | ✓ Closing fragment |
| 09-17 21:43 | 40m | - / - | IU8RFW | -19 / - | 2 | Partial capture |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 215315 +2 1414 F4LDK IU8RFW JN70 215330 -3 1414 IU8RFW F4LDK -07 215345 +6 1414 F4LDK IU8RFW R-05 215400 -4 1414 IU8RFW F4LDK RR73 215415 +5 1414 F4LDK UA4FKT LO23 215430 -2 1414 YB2TTM F4LDK R-10 (x3) 215630 -7 1414 BH4ECL F4LDK -18 (x2) 215745 -15 1414 F4LDK EB3JT JN01 215800 -1 1414 EB3JT F4LDK +00 215815 -14 1414 F4LDK EB3JT R+05 215830 -9 1414 EB3JT F4LDK RR73 215845 -20 1414 F4LDK EB3JT 73
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