NV4B — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving NV4B, decoded by SO8OO in southeastern Poland. 11 FT8 messages attributed to this token as transmitter, on 40m, across 1 UTC dates in the available aggregate history. Last observed 2026-09-21.
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 11 FT8 messages attributed to NV4B 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 -8 dB; no usual signal pattern is inferred.
Overview
Observed FT8 message patterns
- Attributed sample
- 11 messages
- Active dates
- 1 UTC dates
- Estimated median S/N
- -8 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) 5, strong (≥ -8 dB) 6.
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 NV4B in decoded directed-looking exchanges:
Most frequent locator attributed to NV4B
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
- EM64 · 3 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 8,314 km (approx.)
- Last such locator decoded
- 2026-09-21 03:47 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 | NV4B S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 09-21 03:53 | 40m | - / -8 | EA5IT | -12 / - | 2 | Partial capture |
| 09-21 03:52 | 40m | -8 / - | UT9NA | - / -15 | 2 | ✓ Closing fragment |
| 09-21 03:50 | 40m | -7 / - | SP7NC | - / -9 | 2 | ✓ Closing fragment |
| 09-21 03:48 | 40m | -7 / -14 | R2EC | +15 / -18 | 4 | Partial capture |
| 09-21 03:46 | 40m | -9 / - | 5Z4VJ | - / -5 | 5 | ✓ Closing fragment |
| 09-04 03:27 | 40m | - / - | YO6QDY | -10 / - | 2 | Partial capture |
| 07-23 01:17 | 20m | - / +3 | DK9ZQ | +2 / - | 2 | ✓ Closing fragment |
| 07-23 01:11 | 20m | - / -2 | HB9TIH | -19 / - | 3 | ✓ Closing fragment |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 034730 -11 2720 5Z4VJ NV4B EM64 (x3) 034845 +13 2868 NV4B R2EC KO82 (x2) 034930 -7 2800 R2EC NV4B -18 034945 +14 2868 NV4B R2EC R-14 035030 -6 2799 SP7NC NV4B -09 (x2) 035145 -20 1882 NV4B OS4K -06 035200 -10 2800 UT9NA NV4B -15 (x2) 035345 -12 1509 NV4B EA5IT IM99 (x2) 035530 -6 2800 YO6LM NV4B RR73
UTC dB Audio Message 011100 -18 1660 NV4B HB9TIH JN36 (x3) 011700 +3 2914 NV4B DK9ZQ R+03 (x2)
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