RC4YA — 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 RC4YA, decoded by SO8OO in southeastern Poland. 18 FT8 messages attributed to this token as transmitter, on 80m, 20m, across 3 UTC dates in the available aggregate history. Observed between 2026-06-21 and 2026-09-22.
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 18 FT8 messages attributed to RC4YA as the transmitting token by decoded message structure across 3 UTC dates in the available aggregate history. The largest monitored-band total was 80 m (78%), followed by 20 m (22%). In this small sample, the estimated median decoder S/N was -9 dB; no usual signal pattern is inferred.
Overview
Bands
Last attributed message: 2026-09-22 18:19 UTC
Observed FT8 message patterns
- Attributed sample
- 18 messages
- Active dates
- 3 UTC dates
- Estimated median S/N
- -9 dB
- S/N percentile sample
- Too small
- Recurring-pattern threshold
- Not met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 1, moderate (-15 to -9 dB) 8, strong (≥ -8 dB) 9.
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. The sample does not meet the threshold for a recurring time or signal-pattern claim (20 attributed messages, three UTC dates and five distinct 15-minute windows).
Frequent counterpart tokens observed at SO8OO
Tokens most often paired with RC4YA in decoded directed-looking exchanges:
Most frequent locator attributed to RC4YA
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
- LO36 · 15 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 1,817 km (approx.)
- Last such locator decoded
- 2026-09-22 18:19 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 | RC4YA S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 11-01 17:36 | 160m | - / -12 | RU3FM | -5 / - | 5 | ✓ Closing fragment |
| 09-22 18:22 | 80m | - / 0 | RM9WN | -6 / - | 3 | Partial capture |
| 09-22 18:22 | 80m | - / - | OM2ZZ | +21 / - | 4 | Partial capture |
| 09-22 18:17 | 80m | - / -17 | RO7A | +14 / - | 4 | ✓ Closing fragment |
| 09-22 18:16 | 80m | -9 / - | RI1FJZ | - / - | 5 | Partial capture |
| 09-22 18:09 | 80m | - / - | RO7A | +11 / - | 5 | Partial capture |
| 09-22 18:05 | 80m | -7 / - | RI1FJZ | - / - | 5 | Partial capture |
| 09-21 16:13 | 80m | -10 / - | RI1FJZ | - / -16 | 4 | Partial capture |
| 08-20 04:16 | 20m | - / -14 | XQ1KK | -6 / - | 3 | ✓ Closing fragment |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 183745 -13 2525 RC4YA RK4FH -01 173630 -6 2306 RC4YA RU3FM KO94 173700 -20 1260 RC4YA UD8D RR73 173700 -8 2306 RC4YA RU3FM KO94 (x4)
UTC dB Audio Message 181645 -6 2047 RI1FJZ RC4YA LO36 181700 +18 2571 RC4YA RO7A KN95 181715 -5 2047 RI1FJZ RC4YA LO36 181730 +10 2571 RC4YA RO7A KN95 (x3) 181915 -9 2021 RI1FJZ RC4YA LO36 (x2) 182200 +22 2717 RC4YA OM2ZZ JN88 182230 -4 1046 RC4YA RM9WN +00 182230 +21 2717 RC4YA OM2ZZ JN88 182300 -5 1046 RC4YA RM9WN +00 182300 +20 2717 RC4YA OM2ZZ JN88 182330 -8 1046 RC4YA RM9WN +00 182330 +20 2717 RC4YA OM2ZZ JN88
UTC dB Audio Message 041645 -6 2345 RC4YA XQ1KK -14 (x3) 042915 -22 1526 RC4YA RA9HM NO26
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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