YO4RYU — reception at SO8OO
Signals decoded by SO8OO in southeastern Poland. FT8 and CW have separate histories; all times are UTC.
FT8 activity
Receiver-side FT8 activity involving YO4RYU, decoded by SO8OO in southeastern Poland. 115 FT8 messages attributed to this token as transmitter, on 60m, 40m, 20m, across 7 UTC dates in the available aggregate history. Observed between 2026-08-20 and 2026-11-04.
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 115 FT8 messages attributed to YO4RYU as the transmitting token by decoded message structure across 7 UTC dates in the available aggregate history. The largest monitored-band total was 60 m (90%), followed by 40 m (8%) and 20 m (2%). Several six-hour UTC windows tied for the largest share (97%), so no unique busiest interval is claimed. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -14 dB.
Overview
Bands
Last attributed message: 2026-11-04 19:36 UTC
Observed FT8 message patterns
- Attributed sample
- 115 messages
- Active dates
- 7 UTC dates
- Estimated median S/N
- -14 dB
- Estimated 10th-90th percentile
- -20 to -8 dB
- Recurring-pattern threshold
- Met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 39, moderate (-15 to -9 dB) 60, strong (≥ -8 dB) 16.
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 YO4RYU 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 YO4RYU
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
- KN45 · 110 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 730 km (approx.)
- Last such locator decoded
- 2026-11-04 19:34 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 | YO4RYU S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 11-04 19:36 | 40m | - / - | 9A4ZM | 0 / - | 2 | Partial capture |
| 11-04 19:34 | 40m | -13 / - | TC9TR | - / - | 2 | ✓ Closing fragment |
| 11-03 18:09 | 40m | - / -9 | UA4FEN | -8 / - | 3 | Partial capture |
| 11-03 17:08 | 60m | -14 / - | KH8A | - / - | 3 | Partial capture |
| 11-03 16:59 | 60m | -18 / - | KH8A | - / - | 3 | Partial capture |
| 10-12 16:33 | 60m | -12 / - | H49A | - / - | 46 | Partial capture |
| 10-12 16:04 | 60m | -16 / - | H49A | - / - | 18 | Partial capture |
| 10-12 15:57 | 60m | -14 / - | H49A | - / - | 4 | Partial capture |
| 10-12 15:54 | 60m | -13 / - | H49A | - / - | 2 | Partial capture |
| 10-12 15:41 | 60m | -13 / - | H49A | - / - | 9 | Partial capture |
| 10-11 19:11 | 60m | -9 / - | H49A | - / - | 5 | Partial capture |
| 10-11 19:03 | 60m | -18 / - | H49A | - / -23 | 2 | Partial capture |
| 10-11 18:41 | 60m | -18 / - | H49A | - / - | 4 | Partial capture |
| 10-11 16:09 | 60m | - / - | YO5QDI | -5 / - | 6 | Partial capture |
| 10-07 06:19 | 40m | -2 / -3 | HG8LXL | -1 / -12 | 6 | ✓ Full exchange observed |
| 10-07 06:17 | 40m | -7 / - | DJ6OI/P | - / +3 | 2 | Partial capture |
| 09-03 16:49 | 40m | -15 / - | RI1FJL | - / - | 3 | Partial capture |
| 08-20 15:51 | 20m | -11 / - | XU7O | - / - | 2 | Partial capture |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 061900 -6 822 DJ6OI/P YO4RYU R+03 061945 -1 1421 YO4RYU HG8LXL KN06 (x2) 062030 -1 822 HG8LXL YO4RYU -12 062045 -3 1421 YO4RYU HG8LXL R-03 062100 -3 822 HG8LXL YO4RYU RR73 062115 -1 1421 YO4RYU HG8LXL 73 185800 -8 1156 YO4RYU IU4PPL JN54 180930 -7 1237 YO4RYU UA4FEN -09 (x3) 193445 -12 238 TC9TR YO4RYU KN45 (x2) 193630 +0 914 YO4RYU 9A4ZM JN86 (x2)
UTC dB Audio Message 165345 -5 1487 H49A YO4RYU KN45 (x9) 165915 -14 1399 KH8A YO4RYU KN45 (x6)
UTC dB Audio Message 155145 -10 1176 XU7O YO4RYU KN45 (x2)
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.
CW
No CW receptions recorded for this callsign in the last 30 days.
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