4X5DK — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving 4X5DK, decoded by SO8OO in southeastern Poland. 5 FT8 messages attributed to this token as transmitter, on 20m, across 1 UTC dates in the available aggregate history. Last observed 2026-06-11.
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 5 FT8 messages attributed to 4X5DK 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 -15 dB; no usual signal pattern is inferred.
Overview
Observed FT8 message patterns
- Attributed sample
- 5 messages
- Active dates
- 1 UTC dates
- Estimated median S/N
- -15 dB
- S/N percentile sample
- Too small
- Recurring-pattern threshold
- Not met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 2, moderate (-15 to -9 dB) 3, strong (≥ -8 dB) 0.
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 4X5DK in decoded directed-looking exchanges:
Most frequent locator attributed to 4X5DK
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
- KM71 · 3 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 2,325 km (approx.)
- Last such locator decoded
- 2026-06-11 21:38 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 | 4X5DK S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 09-14 20:41 | 40m | - / -19 | RA3GZ | -3 / - | 2 | ✓ Closing fragment |
| 09-14 20:38 | 40m | - / -17 | II0IHMG | -2 / - | 3 | Partial capture |
| 09-09 21:06 | 40m | - / -19 | CR7BRV | -12 / - | 2 | ✓ Closing fragment |
| 07-20 18:32 | 20m | - / -18 | TM25TFR | -15 / - | 2 | Partial capture |
| 07-11 18:31 | 20m | - / -12 | II4JAFL | -4 / - | 4 | Partial capture |
| 07-03 18:12 | 20m | - / -17 | TM8WWA | +8 / - | 2 | ✓ Closing fragment |
| 07-02 20:47 | 20m | - / -16 | CS2WWA | -10 / - | 2 | Partial capture |
| 07-01 20:02 | 20m | - / -17 | CR2WWA | -16 / - | 2 | Partial capture |
| 06-30 20:19 | 20m | - / -13 | E75C | -12 / - | 2 | ✓ Closing fragment |
| 06-30 20:12 | 20m | - / -13 | CR2WWA | -16 / - | 2 | Partial capture |
| 06-25 05:57 | 10m | - / - | IQ9BF | -19 / - | 2 | ✓ Closing fragment |
| 06-23 20:35 | 20m | - / - | SV5BYP | -5 / - | 2 | Partial capture |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 211400 -21 1862 4X5DK SV3AUW -20 (x2) 205345 -17 2233 4X5DK IZ8WDH -16 210615 -13 890 4X5DK CR7BRV -19 (x2) 203830 -4 900 4X5DK II0IHMG -17 (x3) 204100 -5 1772 4X5DK RA3GZ -19 (x2)
UTC dB Audio Message 200200 -15 1686 4X5DK CR2WWA -17 (x2) 203400 -5 822 4X5DK BG0DLA -15 204700 -9 1251 4X5DK CS2WWA -16 (x2) 181200 +8 2566 4X5DK TM8WWA -17 (x2) 190600 +20 2508 4X5DK GB2WWA RR73 183130 -7 1770 4X5DK II4JAFL -12 (x4) 210045 +2 1764 4X5DK EA8UP RR73 183230 -12 1709 4X5DK TM25TFR -18 (x2)
UTC dB Audio Message 055700 -18 1127 4X5DK IQ9BF RRR (x2) 055915 -6 2604 4X5DK IQ4JO -06
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