YO8CYN — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving YO8CYN, decoded by SO8OO in southeastern Poland. 65 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, across 4 UTC dates in the available aggregate history. Observed between 2026-06-07 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 65 FT8 messages attributed to YO8CYN as the transmitting token by decoded message structure across 4 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (71%), followed by 80 m (25%) and 40 m (5%). Several six-hour UTC windows tied for the largest share (71%), so no unique busiest interval is claimed. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (97%); the estimated median was +5 dB.
Overview
Bands
Last attributed message: 2026-09-08 17:29 UTC
Observed FT8 message patterns
- Attributed sample
- 65 messages
- Active dates
- 4 UTC dates
- Estimated median S/N
- +5 dB
- Estimated 10th-90th percentile
- -6 to +11 dB
- Recurring-pattern threshold
- Met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 0, moderate (-15 to -9 dB) 2, strong (≥ -8 dB) 63.
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 YO8CYN in decoded directed-looking exchanges:
Most frequent locator attributed to YO8CYN
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
- KN36 · 17 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 543 km (approx.)
- Last such locator decoded
- 2026-09-08 17:28 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 | YO8CYN S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 09-08 17:28 | 40m | +10 / - | EG1SDC | - / -16 | 3 | ✓ Closing fragment |
| 09-02 19:24 | 80m | -4 / - | RI1FJL | - / -17 | 3 | ✓ Closing fragment |
| 09-02 18:53 | 80m | -4 / - | RI1FJL | - / -17 | 6 | Partial capture |
| 09-02 18:48 | 80m | +2 / - | ZS1J | - / - | 2 | Partial capture |
| 09-02 18:46 | 80m | -2 / -14 | V51WH | -10 / -15 | 7 | ✓ Full exchange observed |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 172815 +10 1842 EG1SDC YO8CYN KN36 (x3) 000230 -14 2248 YO8CYN EG42SDC -08
UTC dB Audio Message 184700 -11 2539 YO8CYN V51WH -14 184715 -5 1555 V51WH YO8CYN R-19 184730 -9 2539 YO8CYN V51WH RR73 184745 +2 1555 V51WH YO8CYN 73 184845 +5 1555 ZS1J YO8CYN KN36 (x2) 185345 -6 2361 RI1FJL YO8CYN KN36 (x9)
UTC dB Audio Message 054245 -9 729 TN8GD YO8CYN RR73 050945 -13 906 YO8CYN TI5RR R-10
UTC dB Audio Message 094930 -5 2952 YO8CYN DO1FDK JO41
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.
FT8DB and SO8OO WebSDR are a hobby project maintained solo. ☕ Buy me a coffee