J38DX — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving J38DX, decoded by SO8OO in southeastern Poland. 346 FT8 messages attributed to this token as transmitter, on 80m, 40m, across 8 UTC dates in the available aggregate history. Observed between 2026-09-03 and 2026-09-12.
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 346 FT8 messages attributed to J38DX as the transmitting token by decoded message structure across 8 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (98%), followed by 80 m (2%). Most decodes (97%) fell within the six-hour window 23:00-05:00 UTC. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (79%); the estimated median was -6 dB.
Overview
Bands
Last attributed message: 2026-09-12 04:41 UTC
Observed FT8 message patterns
- Attributed sample
- 346 messages
- Active dates
- 8 UTC dates
- Estimated median S/N
- -6 dB
- Estimated 10th-90th percentile
- -11 to -1 dB
- Recurring-pattern threshold
- Met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 7, moderate (-15 to -9 dB) 65, strong (≥ -8 dB) 274.
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 J38DX in decoded directed-looking exchanges:
Attributed messages by UTC hour
Rolling 90-day UTC chart window. Counts follow decoded message structure: the first token for CQ, or the second token in a directed-looking message.
Most frequent locator attributed to J38DX
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
- FK92 · 99 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 8,434 km (approx.)
- Last such locator decoded
- 2026-09-12 04:38 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 | J38DX S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 09-12 07:14 | 40m | - / -5 | IN3LHF | -6 / - | 3 | Partial capture |
| 09-12 05:52 | 40m | - / - | DL4KG | +1 / - | 4 | Partial capture |
| 09-12 05:48 | 40m | - / - | DL6UM | -6 / - | 5 | Partial capture |
| 09-12 05:46 | 40m | - / - | R2BT | +4 / - | 4 | Partial capture |
| 09-12 05:45 | 40m | - / -13 | PA3T | 0 / - | 3 | ✓ Closing fragment |
| 09-12 05:42 | 40m | - / -16 | SP2Y | +6 / - | 5 | ✓ Closing fragment |
| 09-12 05:41 | 40m | - / -22 | DA1MN | +1 / - | 3 | ✓ Closing fragment |
| 09-12 05:36 | 40m | - / -14 | YO7CFD | -2 / - | 4 | ✓ Closing fragment |
| 09-12 05:33 | 40m | - / -13 | IZ1KPU | -8 / - | 2 | Partial capture |
| 09-12 05:30 | 40m | - / -10 | DL8JDX | -2 / - | 5 | ✓ Closing fragment |
| 09-12 05:29 | 40m | - / - | OH7MEY | -12 / - | 3 | Partial capture |
| 09-12 05:27 | 40m | - / -17 | EA3CUU | -4 / - | 4 | ✓ Closing fragment |
| 09-12 05:24 | 40m | - / -24 | IK1SKC | -10 / - | 6 | ✓ Closing fragment |
| 09-12 05:21 | 40m | - / -9 | DG1ROL | +9 / - | 3 | ✓ Closing fragment |
| 09-12 05:05 | 40m | - / -20 | DH9OK | +4 / - | 13 | ✓ Closing fragment |
| 09-12 05:04 | 40m | - / -15 | DJ6OI | -2 / - | 9 | ✓ Closing fragment |
| 09-12 05:00 | 40m | - / -20 | OH7VV | -10 / - | 2 | Partial capture |
| 09-12 05:00 | 40m | - / - | 2E0BTX | -14 / - | 4 | Partial capture |
| 09-12 04:58 | 40m | - / -20 | DB1TH | +9 / - | 4 | ✓ Closing fragment |
| 09-12 04:57 | 40m | - / - | SP7NHS | -24 / - | 2 | ✓ Closing fragment |
| 09-12 04:57 | 40m | - / - | 9A5WA | +2 / - | 13 | Partial capture |
| 09-12 04:53 | 40m | - / -10 | IU1TLG | -9 / - | 7 | ✓ Closing fragment |
| 09-12 04:53 | 40m | - / -11 | OG8A | -13 / - | 5 | ✓ Closing fragment |
| 09-12 04:53 | 40m | - / -17 | PD8HUB | -4 / - | 3 | ✓ Closing fragment |
| 09-12 04:48 | 40m | - / -26 | R2BT | 0 / - | 6 | Partial capture |
| 09-12 04:45 | 40m | - / - | PA5MB | -9 / - | 11 | Partial capture |
| 09-12 04:45 | 40m | - / - | PD8HUB | +2 / - | 10 | Partial capture |
| 09-12 04:44 | 40m | - / - | DJ6OI | -9 / - | 2 | Partial capture |
| 09-12 04:41 | 40m | -13 / -18 | SP9ODY | -15 / -3 | 2 | Partial capture |
| 09-12 04:40 | 40m | - / - | PE1OBL | -4 / - | 2 | Partial capture |
| 09-12 04:38 | 40m | - / -8 | IZ1KPU | -9 / - | 5 | Partial capture |
| 09-12 04:38 | 40m | - / -15 | OE8DDX | +1 / - | 3 | Partial capture |
| 09-12 04:36 | 40m | - / - | DC2HO | +8 / - | 2 | ✓ Closing fragment |
| 09-12 04:35 | 40m | - / -9 | S53F | +4 / - | 7 | ✓ Closing fragment |
| 09-12 04:30 | 40m | - / - | YO3OBB | -4 / - | 6 | ✓ Closing fragment |
| 09-12 04:27 | 40m | - / - | 4X5MZ | +1 / - | 6 | Partial capture |
| 09-12 04:26 | 40m | -7 / -19 | PD1AIQ | -4 / -15 | 6 | ✓ Full exchange observed |
| 09-12 04:21 | 40m | - / - | 4X5MZ | +4 / - | 2 | Partial capture |
| 09-12 04:18 | 40m | - / - | EW6X | +7 / - | 3 | Partial capture |
| 09-12 04:15 | 40m | - / - | 2E0BTX | -14 / - | 2 | Partial capture |
| 09-12 04:07 | 40m | - / - | R7OF | +1 / - | 2 | Partial capture |
| 09-12 04:07 | 40m | - / -21 | UR5ZHJ | +4 / - | 2 | Partial capture |
| 09-12 04:06 | 40m | - / -14 | R3SV | -7 / - | 5 | ✓ Closing fragment |
| 09-12 03:59 | 40m | -6 / - | HA3KZ | - / -7 | 2 | ✓ Closing fragment |
| 09-12 03:57 | 40m | -5 / -3 | OH4EBD | -5 / - | 8 | ✓ Closing observed |
| 09-12 03:21 | 40m | - / -14 | EH3ST | -1 / - | 2 | Partial capture |
| 09-12 03:07 | 40m | - / -18 | EA2DYB | +3 / - | 3 | ✓ Closing fragment |
| 09-12 02:53 | 40m | - / -18 | OM1DMT | -5 / - | 3 | ✓ Closing fragment |
| 09-12 02:32 | 60m | - / - | F6ICX | +16 / - | 2 | Partial capture |
| 09-12 02:31 | 60m | - / -15 | PA4PA | +3 / - | 3 | ✓ Closing fragment |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 054830 +6 3032 J38DX R2BT KO85 054830 -5 1377 J38DX DL6UM JO60 (x2) 054930 +5 3032 J38DX R2BT KO85 054930 -7 1377 J38DX DL6UM JO60 (x3) 055200 -5 2996 J38DX F4HXJ IN87 055200 +4 2199 J38DX DL4KG JN48 (x4) 071430 -6 2914 J38DX IN3LHF -05 (x3)
UTC dB Audio Message 023100 +5 1777 J38DX PA4PA JO22 (x3) 023230 +15 432 J38DX F6ICX JN18 (x2)
UTC dB Audio Message 055445 -22 1952 J38DX F5UTN JN08 055445 -2 2105 J38DX DM5KM -14 (x3) 055645 -22 1952 J38DX F5UTN JN08 055645 +0 2158 J38DX DM5KM -14 (x2) 055945 -12 906 J38DX F5UKW JN12 (x3) 060145 -24 1951 J38DX F5UTN JN08 (x5)
Decoder S/N history by band
Count-weighted daily averages across messages attributed to this profiled token and successfully decoded at SO8OO, limited to the rolling 90-day UTC chart window.
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