PC4D — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving PC4D, decoded by SO8OO in southeastern Poland. 27 FT8 messages attributed to this token as transmitter, on 40m, 20m, 10m, across 2 UTC dates in the available aggregate history. Observed between 2026-06-13 and 2026-08-18.
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 27 FT8 messages attributed to PC4D as the transmitting token by decoded message structure across 2 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (70%), followed by 20 m (22%) and 10 m (7%). In this small sample, the estimated median decoder S/N was -17 dB; no usual signal pattern is inferred.
Overview
Bands
Last attributed message: 2026-08-18 19:46 UTC
Observed FT8 message patterns
- Attributed sample
- 27 messages
- Active dates
- 2 UTC dates
- Estimated median S/N
- -17 dB
- Estimated 10th-90th percentile
- -21 to -9 dB
- Recurring-pattern threshold
- Not met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 16, moderate (-15 to -9 dB) 10, strong (≥ -8 dB) 1.
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 PC4D in decoded directed-looking exchanges:
Most frequent locator attributed to PC4D
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
- JO21 · 17 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 1,192 km (approx.)
- Last such locator decoded
- 2026-08-18 19:46 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 | PC4D S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 08-18 19:49 | 40m | - / -15 | YO4NF | -15 / - | 3 | Partial capture |
| 08-18 19:47 | 40m | - / -16 | R4HEA | -18 / - | 3 | Partial capture |
| 08-18 19:45 | 40m | - / -16 | RZ6AKF | -14 / - | 2 | Partial capture |
| 08-18 19:42 | 40m | - / - | DM2BM | -12 / - | 3 | ✓ Closing fragment |
| 08-18 19:31 | 40m | - / - | US2YW | -9 / - | 5 | Partial capture |
| 08-18 19:29 | 40m | -17 / -15 | 9A1CCB | -12 / -11 | 4 | ✓ Full exchange observed |
| 08-18 19:08 | 40m | - / -4 | F1PBZ | -9 / - | 3 | Partial capture |
| 08-18 19:08 | 40m | - / - | US2YW | -8 / - | 3 | Partial capture |
| 08-18 19:02 | 40m | - / -11 | RN6MA | -12 / - | 3 | Partial capture |
| 08-18 19:01 | 40m | - / -15 | YO4NF | -5 / - | 2 | Partial capture |
| 08-18 18:46 | 40m | - / +8 | DL6CHF | -12 / - | 3 | ✓ Closing fragment |
| 08-18 18:41 | 40m | - / - | SN1A | -15 / - | 3 | ✓ Closing fragment |
| 08-18 18:40 | 40m | -19 / -13 | RN2F | -13 / - | 4 | ✓ Closing observed |
| 08-18 18:39 | 40m | - / - | DL6ZOG | -12 / - | 2 | Partial capture |
| 08-18 18:32 | 40m | -14 / - | F5PMF | -14 / - | 2 | ✓ Closing observed |
| 08-18 18:25 | 40m | - / - | DL5DQZ | -3 / - | 5 | Partial capture |
| 08-18 18:17 | 40m | - / -17 | SP6EFY | -2 / - | 3 | ✓ Closing fragment |
| 08-18 18:12 | 40m | - / - | PE1NPS | -12 / - | 2 | ✓ Closing fragment |
| 08-18 18:08 | 40m | - / - | DL6UM | -12 / - | 4 | Partial capture |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 193645 -21 1981 PC4D YO4NF -12 194130 -22 1978 CQ PC4D JO21 194215 -14 1978 PC4D DM2BM JO54 (x3) 194345 -14 1977 PC4D YO4NF -11 194545 -12 1977 PC4D RZ6AKF -16 194600 -18 1978 CQ PC4D JO21 a1 194615 -16 1977 PC4D RZ6AKF -16 194745 -19 1977 PC4D R4HEA LO53 (x3) 194945 -16 1976 PC4D YO4NF -15 (x3)
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