9H4JX — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving 9H4JX, decoded by SO8OO in southeastern Poland. 1,081 FT8 messages attributed to this token as transmitter, on 80m, 60m, 40m, 20m, 10m, across 29 UTC dates in the available aggregate history. Observed between 2026-06-09 and 2026-10-05.
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 1,081 FT8 messages attributed to 9H4JX as the transmitting token by decoded message structure across 29 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (36%), followed by 20 m (26%) and 10 m (23%). The busiest six-hour window was 14:00-20:00 UTC, containing 46% of decodes. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -14 dB.
Overview
Bands
Last attributed message: 2026-10-05 04:04 UTC
Observed FT8 message patterns
- Attributed sample
- 1,081 messages
- Active dates
- 29 UTC dates
- Estimated median S/N
- -14 dB
- Estimated 10th-90th percentile
- -21 to -6 dB
- Recurring-pattern threshold
- Met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 441, moderate (-15 to -9 dB) 442, strong (≥ -8 dB) 198.
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 9H4JX 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 9H4JX
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
- JM76 · 368 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 1,591 km (approx.)
- Last such locator decoded
- 2026-10-05 04:04 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 | 9H4JX S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 10-05 04:09 | 40m | - / -15 | R8CKV | -9 / - | 9 | Partial capture |
| 10-05 04:04 | 40m | - / -11 | SP1550SK | -20 / - | 2 | Partial capture |
| 10-05 03:31 | 40m | - / +8 | DG4CG | -7 / - | 3 | Partial capture |
| 10-05 03:04 | 40m | - / -14 | RV6ANA | -17 / - | 6 | Partial capture |
| 10-05 03:03 | 40m | - / -4 | F4JUQ | -6 / - | 4 | ✓ Closing fragment |
| 10-03 14:59 | 10m | - / -23 | LZ1EV | -7 / - | 6 | Partial capture |
| 10-03 04:46 | 60m | - / - | SP4NKJ | -2 / - | 4 | Partial capture |
| 10-03 04:45 | 60m | - / - | LA6YEA | -7 / - | 5 | Partial capture |
| 10-03 04:45 | 60m | 0 / - | 9T0MD | - / -20 | 3 | Partial capture |
| 10-03 04:44 | 60m | - / -5 | VE3FF | -18 / - | 2 | Partial capture |
| 10-03 04:42 | 60m | - / - | LA6YEA | -6 / - | 2 | Partial capture |
| 10-03 04:38 | 60m | - / - | SP4NKJ | -14 / - | 3 | Partial capture |
| 10-03 04:38 | 60m | -9 / - | 9T0MD | - / -25 | 6 | Partial capture |
| 10-03 04:38 | 60m | - / - | IK4CBO | -7 / - | 2 | Partial capture |
| 10-03 04:37 | 60m | - / - | LY8O | -4 / - | 2 | Partial capture |
| 10-03 04:36 | 60m | - / - | PA4PA | -2 / - | 5 | Partial capture |
| 10-03 04:36 | 60m | -12 / +7 | ER2OZ | 0 / -7 | 6 | ✓ Full exchange observed |
| 10-02 19:03 | 40m | - / - | DL2EMU | -4 / - | 2 | Partial capture |
| 10-02 18:59 | 40m | - / -2 | DK1SF | -5 / - | 10 | Partial capture |
| 10-02 18:57 | 40m | - / - | DF3AS | -16 / - | 2 | Partial capture |
| 10-02 18:56 | 40m | - / - | R2OB | -14 / - | 2 | Partial capture |
| 10-02 18:55 | 40m | - / -8 | ON6DL | -7 / - | 3 | Partial capture |
| 10-02 18:53 | 40m | - / - | IU2SKD | -10 / - | 2 | Partial capture |
| 10-02 18:49 | 40m | - / -9 | HB9ECS | +10 / - | 3 | ✓ Closing fragment |
| 10-02 18:49 | 40m | - / -12 | LA6NNA | -18 / - | 9 | Partial capture |
| 10-02 18:48 | 40m | - / -7 | M7HNI | -16 / - | 2 | ✓ Closing fragment |
| 09-30 18:40 | 80m | - / - | OZ1HPS | -5 / - | 5 | Partial capture |
| 09-30 18:36 | 80m | - / - | HB9DKG | +4 / - | 3 | Partial capture |
| 09-30 18:34 | 80m | - / - | OM5CX | +1 / - | 8 | Partial capture |
| 09-30 18:34 | 80m | -15 / - | SP7SZJ | +3 / -7 | 6 | Partial capture |
| 09-30 18:33 | 80m | - / - | R3XBV | -20 / - | 2 | Partial capture |
| 09-30 18:31 | 80m | - / -9 | 9A60CBM | -2 / - | 3 | ✓ Closing fragment |
| 09-30 18:31 | 80m | - / - | DL8NW | -4 / - | 3 | Partial capture |
| 09-30 18:30 | 80m | - / - | SP6ZJB | 0 / - | 2 | Partial capture |
| 09-30 18:29 | 80m | -16 / -8 | DK8CX | -1 / -12 | 4 | ✓ Full exchange observed |
| 09-30 18:28 | 80m | -13 / -22 | SQ6PM | +11 / -15 | 10 | ✓ Full exchange observed |
| 09-30 18:28 | 80m | -12 / -7 | IW3QTG | -14 / -13 | 4 | ✓ Full exchange observed |
| 09-30 18:26 | 80m | -13 / -11 | UT5ECZ | +5 / 0 | 4 | ✓ Full exchange observed |
| 09-30 18:25 | 80m | - / - | DK9WI | +2 / - | 2 | Partial capture |
| 09-30 18:24 | 80m | -10 / -10 | SP2BZ | -15 / -19 | 6 | ✓ Full exchange observed |
| 09-30 18:22 | 80m | -14 / -17 | R3HH | +4 / -9 | 6 | ✓ Full exchange observed |
| 09-30 18:21 | 80m | -15 / -7 | 9A7KWS | -14 / - | 6 | ✓ Closing observed |
| 09-30 18:20 | 80m | - / -12 | R7DX | +3 / - | 4 | ✓ Closing fragment |
| 09-30 18:20 | 80m | -16 / - | IK1MJL | -3 / +1 | 3 | ✓ Closing observed |
| 09-30 18:19 | 80m | -14 / -10 | DL6TK | +2 / +6 | 4 | ✓ Full exchange observed |
| 09-30 18:18 | 80m | - / - | DL8NW | -12 / - | 2 | Partial capture |
| 09-30 18:18 | 80m | -16 / -7 | LA1AAA | -6 / -8 | 4 | ✓ Full exchange observed |
| 09-30 18:18 | 80m | - / - | US2YW | +3 / - | 3 | Partial capture |
| 09-30 18:17 | 80m | - / - | R3BDQ | -9 / - | 5 | ✓ Closing fragment |
| 09-30 18:17 | 80m | - / - | R3HH | -6 / - | 5 | Partial capture |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 035000 -21 1998 CQ 9H4JX JM76 (x2) 040115 -9 2718 9H4JX RK4UZ R-14 040415 -18 1999 9H4JX SP1550SK -11 040430 -22 1998 CQ 9H4JX JM76 040445 -22 1999 9H4JX SP1550SK -13 040915 -4 3053 9H4JX R8CKV -15 (x9)
UTC dB Audio Message 134045 -8 458 9H4JX DL1FUG JO40 134115 -9 1840 9H4JX DO1FZL JO50 134115 -4 458 9H4JX DL1FUG JO40 134145 -9 1840 9H4JX DO1FZL JO50 134145 -3 458 9H4JX DL1FUG JO40 134215 -7 1840 9H4JX DO1FZL JO50 134245 -3 458 9H4JX DL1FUG JO40 100430 -12 2246 9H4JX <...> -14 145930 -9 1795 9H4JX LZ1EV -23 (x2) 150000 -17 2294 9H4JX D2ACE +07 150030 -8 1795 9H4JX LZ1EV -23 (x4)
UTC dB Audio Message 044300 -6 1899 9H4JX LA6YEA JO48 044415 -19 1363 9H4JX VE3FF -05 044515 -3 1296 9T0MD 9H4JX JM76 044530 -4 1899 9H4JX LA6YEA JO48 044545 +2 540 9T0MD 9H4JX R-20 044600 -5 1336 9H4JX SP4NKJ KO13 044600 -7 1899 9H4JX LA6YEA JO48 044615 -18 2319 9H4JX VE3FF -05 044615 +0 540 9T0MD 9H4JX R-23 044630 +1 1335 9H4JX SP4NKJ KO13 044630 -8 1899 9H4JX LA6YEA JO48 044700 +3 1344 9H4JX SP4NKJ KO13 044700 -7 1899 9H4JX LA6YEA JO48 044730 -7 1345 9H4JX SP4NKJ KO13 044730 -8 1899 9H4JX LA6YEA JO48
UTC dB Audio Message 183615 +1 1771 9H4JX OM5CX JN98 183615 +9 2827 9H4JX HB9DKG JN47 183630 -15 1943 SP7SZJ 9H4JX -07 183645 +7 1887 9H4JX SP7SZJ JO91 183645 -6 1771 9H4JX OM5CX JN98 183645 +1 2827 9H4JX HB9DKG JN47 183715 +5 1771 9H4JX OM5CX JN98 183715 +2 2511 9H4JX HB9DKG JN47 183745 +7 1771 9H4JX OM5CX JN98 (x2) 184045 -7 1943 9H4JX OZ1HPS JO45 (x5)
UTC dB Audio Message 055315 +3 1018 9H4JX RN3TT -05 055345 +1 1829 9H4JX YO3RU KN34 055400 -4 1988 RN3TT 9H4JX R-13 (x2) 055500 -2 1988 M9NEV 9H4JX -05 055600 -3 1988 HB9NBN 9H4JX -07 055630 -14 1988 OH4JFN 9H4JX -11 (x2) 055800 -8 1988 G4VMG 9H4JX R-23 (x2) 055900 -8 1989 HB9NBN 9H4JX RR73 055915 -6 1695 9H4JX RA5CW MO85 (x2) 060030 -18 1988 RA5CW 9H4JX RR73 060045 -11 1691 9H4JX RA5CW 73
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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