JR3DXJ — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving JR3DXJ, decoded by SO8OO in southeastern Poland. 26 FT8 messages attributed to this token as transmitter, on 20m, across 6 UTC dates in the available aggregate history. Observed between 2026-06-08 and 2026-06-19.
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 26 FT8 messages attributed to JR3DXJ as the transmitting token by decoded message structure across 6 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (100%). Several six-hour UTC windows tied for the largest share (100%), so no unique busiest interval is claimed. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -16 dB.
Overview
Observed FT8 message patterns
- Attributed sample
- 26 messages
- Active dates
- 6 UTC dates
- Estimated median S/N
- -16 dB
- Estimated 10th-90th percentile
- -20 to -9 dB
- Recurring-pattern threshold
- Met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 14, moderate (-15 to -9 dB) 10, strong (≥ -8 dB) 2.
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.
Frequent counterpart tokens observed at SO8OO
Tokens most often paired with JR3DXJ in decoded directed-looking exchanges:
Most frequent locator attributed to JR3DXJ
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
- PM74 · 17 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 8,565 km (approx.)
- Last such locator decoded
- 2026-06-19 21:15 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 | JR3DXJ S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 07-07 21:03 | 20m | - / - | DK4OX | -5 / - | 3 | Partial capture |
| 07-07 21:02 | 20m | - / -24 | IU4QQE | -12 / - | 4 | ✓ Closing fragment |
| 07-07 20:55 | 20m | - / - | DL1R | +2 / - | 8 | Partial capture |
| 07-07 20:55 | 20m | - / - | DM5WGL | +1 / - | 4 | Partial capture |
| 07-07 20:53 | 20m | - / -3 | 4X1UF | -7 / - | 2 | ✓ Closing fragment |
| 07-07 20:51 | 20m | - / -20 | DK2SHS | +2 / - | 2 | ✓ Closing fragment |
| 06-26 20:35 | 20m | - / - | IU4RWW | -3 / - | 7 | Partial capture |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 205715 +0 2722 JR3DXJ DL1R JN58 (x5) 210245 -14 1931 JR3DXJ IU4QQE JN64 (x2) 210315 -3 2136 JR3DXJ DK4OX JO52 210345 -15 1931 JR3DXJ IU4QQE R-24 210345 -8 2136 JR3DXJ DK4OX JO52 210415 -10 1931 JR3DXJ IU4QQE 73 210415 -3 2137 JR3DXJ DK4OX JO52 223230 +14 2891 JR3DXJ TM74TFR -12 223300 +16 2891 JR3DXJ RR73; JI3CWI <...> +02 224830 -23 1598 JR3DXJ OY1R -18
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