F4CZK — 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 F4CZK, decoded by SO8OO in southeastern Poland. 30 FT8 messages attributed to this token as transmitter, on 60m, 40m, 20m, 10m, across 7 UTC dates in the available aggregate history. Observed between 2026-06-07 and 2026-10-06.
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 30 FT8 messages attributed to F4CZK as the transmitting token by decoded message structure across 7 UTC dates in the available aggregate history. The largest monitored-band total was 10 m (57%), followed by 20 m (27%) and 60 m (13%). Several six-hour UTC windows tied for the largest share (83%), so no unique busiest interval is claimed. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -15 dB.
Overview
Bands
Last attributed message: 2026-10-06 20:30 UTC
Observed FT8 message patterns
- Attributed sample
- 30 messages
- Active dates
- 7 UTC dates
- Estimated median S/N
- -15 dB
- Estimated 10th-90th percentile
- -20 to -8 dB
- Recurring-pattern threshold
- Met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 12, moderate (-15 to -9 dB) 13, strong (≥ -8 dB) 5.
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 F4CZK in decoded directed-looking exchanges:
Most frequent locator attributed to F4CZK
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
- JN18 · 24 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 1,370 km (approx.)
- Last such locator decoded
- 2026-10-06 20:30 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 | F4CZK S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 10-27 22:27 | 60m | - / -15 | EA5FQ | -15 / - | 2 | ✓ Closing fragment |
| 10-06 20:32 | 60m | - / - | F5JAE | -9 / - | 2 | ✓ Closing fragment |
| 10-06 20:21 | 60m | -15 / - | PC5D | - / -6 | 2 | Partial capture |
| 10-06 20:19 | 60m | - / -13 | F6BBQ | -9 / - | 2 | ✓ Closing fragment |
| 08-29 09:47 | 20m | -20 / - | RZ1OA | - / - | 2 | Partial capture |
| 08-27 14:45 | 20m | -8 / - | A61FJ | - / - | 2 | Partial capture |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 201915 -8 634 F4CZK F6BBQ -13 (x2) 202100 -16 2473 PC5D F4CZK R-06 (x2) 202700 -19 2159 5P1KZX F4CZK 73 203015 -20 2060 PA3ANG F4CZK JN18 203230 -7 2364 F4CZK F5JAE RR73 (x2) 222730 -17 1014 F4CZK EA5FQ -15 (x2)
UTC dB Audio Message 212100 -13 525 F4CZK RR73; DL5AWR <...> -04 144515 -15 2318 A61FJ F4CZK JN18 (x2) 094300 -16 1430 R4AAR F4CZK JN18 094700 -20 1912 RZ1OA F4CZK JN18 (x2)
UTC dB Audio Message 213500 -5 2333 F4CZK CN8NS -17 213530 -1 2333 F4CZK RR73; OK1AWC <...> -14 213645 -16 1739 YU2MMT F4CZK JN18
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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