W4VKU — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving W4VKU, decoded by SO8OO in southeastern Poland. 17 FT8 messages attributed to this token as transmitter, on 40m, across 1 UTC dates in the available aggregate history. Last observed 2026-09-04.
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 17 FT8 messages attributed to W4VKU 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 +1 dB; no usual signal pattern is inferred.
Overview
Observed FT8 message patterns
- Attributed sample
- 17 messages
- Active dates
- 1 UTC dates
- Estimated median S/N
- +1 dB
- S/N percentile sample
- Too small
- Recurring-pattern threshold
- Not met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 0, moderate (-15 to -9 dB) 0, 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 W4VKU in decoded directed-looking exchanges:
Most frequent locator attributed to W4VKU
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
- FM05 · 5 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 7,754 km (approx.)
- Last such locator decoded
- 2026-09-04 00:40 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 | W4VKU S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 09-04 00:40 | 40m | +1 / - | N3YPL | - / +5 | 3 | ✓ Closing fragment |
| 09-04 00:39 | 40m | +3 / -6 | EB3JT | -6 / -11 | 6 | Partial capture |
| 09-04 00:37 | 40m | +2 / - | <...> | - / -16 | 2 | Partial capture |
| 09-04 00:36 | 40m | - / -12 | R2BQM | +4 / - | 5 | Partial capture |
| 09-04 00:34 | 40m | +1 / - | AC9HP | - / -12 | 5 | ✓ Closing fragment |
| 09-04 00:32 | 40m | -2 / - | OA4ENG | - / -10 | 3 | ✓ Closing fragment |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 003700 +3 2657 W4VKU R2BQM -12 003745 +3 2657 <...> W4VKU R-16 003800 +4 2657 W4VKU R2BQM -12 003815 +2 2657 <...> W4VKU R-16 003830 +2 2657 W4VKU R2BQM -12 003900 -11 2657 W4VKU EB3JT JN01 003915 +3 2656 EB3JT W4VKU -11 (x2) 004000 -6 2656 W4VKU EB3JT R-06 004015 +3 2657 EB3JT W4VKU -11 004045 +1 2657 N3YPL W4VKU FM05 004100 -1 2657 W4VKU EB3JT R-06 004215 +1 2656 N3YPL W4VKU R+05 (x2) 004315 -3 2657 N8PFK W4VKU +05
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