9Y4C — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving 9Y4C, decoded by SO8OO in southeastern Poland. 795 FT8 messages attributed to this token as transmitter, on 40m, 20m, across 15 UTC dates in the available aggregate history. Observed between 2026-06-16 and 2026-09-08.
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 795 FT8 messages attributed to 9Y4C as the transmitting token by decoded message structure across 15 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (95%), followed by 40 m (5%). Most decodes (96%) fell within the six-hour window 21:00-03:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -11 dB.
Overview
Bands
Last attributed message: 2026-09-08 03:40 UTC
Observed FT8 message patterns
- Attributed sample
- 795 messages
- Active dates
- 15 UTC dates
- Estimated median S/N
- -11 dB
- Estimated 10th-90th percentile
- -20 to -3 dB
- Recurring-pattern threshold
- Met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 208, moderate (-15 to -9 dB) 342, strong (≥ -8 dB) 245.
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 9Y4C 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 9Y4C
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
- FK90 · 568 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 8,602 km (approx.)
- Last such locator decoded
- 2026-09-08 03:40 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 | 9Y4C S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 09-08 03:32 | 40m | - / -12 | US1VM | -2 / - | 6 | Partial capture |
| 09-08 03:22 | 40m | - / -10 | R6LE | -21 / - | 3 | ✓ Closing fragment |
| 09-08 03:16 | 40m | -23 / -21 | UR5LAK | -9 / - | 6 | ✓ Closing observed |
| 09-08 03:03 | 40m | -18 / - | YO8RSL | - / -25 | 2 | ✓ Closing fragment |
| 09-08 02:52 | 40m | - / - | RZ6L | 0 / - | 4 | Partial capture |
| 09-08 02:22 | 40m | - / - | RZ6CO | -21 / - | 2 | Partial capture |
| 09-08 01:32 | 40m | - / -1 | AA2S | -6 / - | 3 | ✓ Closing fragment |
| 09-08 01:28 | 40m | - / -17 | R9MJ | -14 / - | 6 | Partial capture |
| 09-08 01:22 | 40m | -15 / - | IZ4AIF | - / -4 | 3 | ✓ Closing fragment |
| 09-08 01:15 | 40m | - / -19 | SV1MOZ | -12 / - | 7 | ✓ Closing fragment |
| 09-08 01:10 | 40m | - / -16 | RU6FK | +1 / - | 2 | Partial capture |
| 09-08 01:01 | 40m | -22 / - | NK5G | - / -9 | 2 | Partial capture |
| 09-08 00:59 | 40m | -21 / -20 | CT7ARQ | -20 / - | 4 | ✓ Closing observed |
| 08-29 01:13 | 40m | - / - | SV1TRJ | -20 / - | 7 | Partial capture |
| 08-29 01:03 | 40m | - / - | SV1TRJ | -18 / - | 7 | Partial capture |
| 08-29 01:00 | 40m | -22 / - | N5VR | - / -16 | 2 | ✓ Closing fragment |
| 08-29 00:57 | 40m | -21 / - | UA3UCV | - / -15 | 2 | Partial capture |
| 08-29 00:56 | 40m | -20 / -8 | DL1SRS | -7 / -12 | 5 | ✓ Full exchange observed |
| 08-29 00:50 | 40m | - / -7 | UR1CCT | -6 / - | 3 | ✓ Closing fragment |
| 08-29 00:48 | 40m | - / - | EA3AAY | -10 / - | 2 | ✓ Closing fragment |
| 08-29 00:45 | 40m | - / -18 | EA1KCN | -10 / - | 4 | ✓ Closing fragment |
| 08-27 23:12 | 20m | - / - | DL3HN | -8 / - | 6 | Partial capture |
| 08-26 03:08 | 20m | -17 / -2 | SP8MO | -4 / -12 | 11 | ✓ Full exchange observed |
| 08-26 03:03 | 20m | -18 / - | KB8BSN | - / +4 | 4 | ✓ Closing fragment |
| 08-25 22:53 | 40m | - / - | DL1ESZ | +3 / - | 3 | Partial capture |
| 08-25 22:49 | 40m | - / -15 | R2BQM | +2 / - | 2 | ✓ Closing fragment |
| 08-25 02:05 | 40m | - / -18 | UA3PY | +8 / - | 6 | Partial capture |
| 08-25 02:02 | 40m | - / - | RV3IO | -10 / - | 2 | Partial capture |
| 08-25 01:50 | 40m | - / -13 | UG4L | -4 / - | 5 | ✓ Closing fragment |
| 08-25 01:45 | 20m | - / -19 | ZZ2DX | -19 / - | 4 | ✓ Closing fragment |
| 08-25 01:35 | 40m | - / - | K1MMK | -20 / - | 2 | ✓ Closing fragment |
| 08-25 01:26 | 40m | - / -15 | SV1DKR | -10 / - | 9 | ✓ Closing fragment |
| 08-25 01:23 | 20m | -18 / - | VA3TBW | - / +9 | 3 | ✓ Closing fragment |
| 08-25 01:22 | 40m | - / -13 | RA3TKS | +4 / - | 4 | Partial capture |
| 08-25 01:14 | 40m | - / -14 | RA3TKS | -3 / - | 2 | Partial capture |
| 08-25 01:12 | 20m | -16 / -24 | KR4EBE | -1 / +10 | 6 | ✓ Full exchange observed |
| 08-25 01:05 | 20m | -14 / - | PY2MTG | - / -14 | 2 | ✓ Closing fragment |
| 08-25 01:01 | 20m | -17 / - | W4MG | - / 0 | 3 | ✓ Closing fragment |
| 08-25 00:52 | 20m | -12 / - | K5ARH | - / -4 | 5 | ✓ Closing fragment |
| 08-25 00:46 | 20m | -10 / - | K5RSB | - / -5 | 3 | ✓ Closing fragment |
| 08-25 00:46 | 40m | - / -14 | UA3DIB | +17 / - | 3 | ✓ Closing fragment |
| 08-25 00:44 | 20m | -11 / -20 | 5Z4VJ | -6 / +3 | 7 | ✓ Full exchange observed |
| 08-24 01:14 | 20m | -11 / - | AD1DA | - / -19 | 2 | Partial capture |
| 08-24 01:09 | 20m | -12 / - | KF1G | - / -4 | 2 | Partial capture |
| 08-24 01:08 | 20m | - / -7 | IK8TLZ | -24 / - | 2 | ✓ Closing fragment |
| 08-24 00:58 | 20m | - / - | LZ1SAD | -10 / - | 2 | Partial capture |
| 08-24 00:56 | 20m | - / - | IK2ZJR | +5 / - | 11 | Partial capture |
| 08-24 00:30 | 20m | -13 / -10 | XQ1KK | -5 / - | 4 | ✓ Closing observed |
| 08-24 00:28 | 20m | -13 / - | KE2HSZ | - / -9 | 2 | ✓ Closing fragment |
| 08-24 00:16 | 20m | - / - | WA2SQQ | -8 / - | 3 | Partial capture |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 032315 -16 1966 9Y4C R6LE R-10 (x2) 032500 -23 1870 CQ 9Y4C FK90 a1 (x3) 033215 +1 2878 9Y4C US1VM -12 (x6) 033830 -22 1870 CQ 9Y4C FK90 (x4)
UTC dB Audio Message 030915 -13 2251 SP8MO 9Y4C -12 030930 -3 1533 9Y4C SP8MO R-02 030945 -20 2251 SP8MO 9Y4C -12 031000 -5 1533 9Y4C SP8MO R-05 (x2) 031045 -16 2251 CQ 9Y4C FK90 031115 -20 2251 SP8MO 9Y4C RR73 031130 -6 1532 9Y4C SP8MO 73 031145 -15 2251 SP8MO 9Y4C 73 231200 -6 728 9Y4C DL3HN JN49 (x6)
UTC dB Audio Message 220115 +6 2501 9Y4C SQ9DJQ -11
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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