JM4WUZ — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving JM4WUZ, decoded by SO8OO in southeastern Poland. 7 FT8 messages attributed to this token as transmitter, on 20m, across 1 UTC dates in the available aggregate history. Last observed 2026-07-18.
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 7 FT8 messages attributed to JM4WUZ 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 -14 dB; no usual signal pattern is inferred.
Overview
Observed FT8 message patterns
- Attributed sample
- 7 messages
- Active dates
- 1 UTC dates
- Estimated median S/N
- -14 dB
- S/N percentile sample
- Too small
- Recurring-pattern threshold
- Not met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 1, moderate (-15 to -9 dB) 6, 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 JM4WUZ in decoded directed-looking exchanges:
Most frequent locator attributed to JM4WUZ
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
- PM64
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 8,453 km (approx.)
- Last such locator decoded
- 2026-07-18 21:16 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 | JM4WUZ S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 08-29 20:06 | 80m | - / -18 | SV8JE | +4 / - | 4 | ✓ Closing fragment |
| 08-29 20:00 | 80m | - / -9 | UN8DSW | -14 / - | 2 | ✓ Closing fragment |
| 08-28 09:56 | 10m | - / -13 | CU2AP | -16 / - | 2 | ✓ Closing fragment |
| 08-28 07:45 | 10m | - / -14 | ON4IQ | +13 / - | 3 | ✓ Closing fragment |
| 08-22 19:48 | 80m | - / -22 | R7CD | +4 / - | 3 | Partial capture |
| 08-21 21:53 | 20m | - / -19 | HZ1SK | -13 / - | 4 | ✓ Closing fragment |
| 07-18 21:18 | 20m | - / - | R7RBE | -5 / - | 3 | Partial capture |
| 07-18 21:16 | 20m | -13 / - | GD3SKZ | - / -8 | 7 | Partial capture |
| 07-15 11:01 | 20m | - / -7 | <...> | -14 / - | 2 | Partial capture |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 193315 +19 356 JM4WUZ DJ5FI -08 194845 +4 2229 JM4WUZ R7CD -22 (x3) 200015 -11 1993 JM4WUZ UN8DSW -09 (x2) 200645 +2 231 JM4WUZ SV8JE -18 (x4)
UTC dB Audio Message 074515 +12 2664 JM4WUZ ON4IQ JO20 (x3) 095600 -14 1739 JM4WUZ CU2AP R-13 (x2)
UTC dB Audio Message 211715 -13 2408 GD3SKZ JM4WUZ -08 (x2) 211800 -4 2494 JM4WUZ R7RBE KN64 211815 -14 2408 GD3SKZ JM4WUZ -08 211830 -5 2494 JM4WUZ R7RBE KN64 211845 -14 2408 GD3SKZ JM4WUZ -08 211900 -5 2494 JM4WUZ R7RBE KN64 211915 -15 2408 GD3SKZ JM4WUZ -08 203930 -5 439 JM4WUZ ZA/KN7L R-12 132745 -22 1236 JM4WUZ R3KLA KO90 215300 -14 1940 JM4WUZ HZ1SK R-19 (x4) 085900 -20 2539 JM4WUZ KI2X RR73
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