DF7CB — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving DF7CB, decoded by SO8OO in southeastern Poland. 44 FT8 messages attributed to this token as transmitter, on 80m, 20m, 10m, across 5 UTC dates in the available aggregate history. Observed between 2026-06-22 and 2026-08-31.
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 44 FT8 messages attributed to DF7CB as the transmitting token by decoded message structure across 5 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (61%), followed by 80 m (34%) and 10 m (5%). Several six-hour UTC windows tied for the largest share (61%), so no unique busiest interval is claimed. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -7 dB.
Overview
Bands
Last attributed message: 2026-08-31 19:44 UTC
Observed FT8 message patterns
- Attributed sample
- 44 messages
- Active dates
- 5 UTC dates
- Estimated median S/N
- -7 dB
- Estimated 10th-90th percentile
- -15 to +4 dB
- Recurring-pattern threshold
- Met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 3, moderate (-15 to -9 dB) 15, strong (≥ -8 dB) 26.
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 DF7CB 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 DF7CB
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
- JO31 · 33 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 1,054 km (approx.)
- Last such locator decoded
- 2026-08-31 19:43 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 | DF7CB S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 08-31 19:43 | 80m | 0 / - | SM6YRB | - / -7 | 4 | Partial capture |
| 08-31 19:42 | 80m | - / - | DL1DCT | -11 / - | 3 | Partial capture |
| 08-30 22:01 | 80m | +6 / - | DO5RRS | 0 / +7 | 7 | ✓ Closing observed |
| 08-30 21:57 | 80m | 0 / - | GH5DX | - / -7 | 8 | ✓ Closing fragment |
| 08-28 21:48 | 20m | -5 / - | RI1FJL | - / -5 | 12 | Partial capture |
| 07-13 12:01 | 20m | -13 / - | ZC4RH | - / - | 11 | Partial capture |
| 07-13 11:49 | 20m | -15 / - | T22TT | - / -22 | 3 | ✓ Closing fragment |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 220200 +3 1759 DF7CB DO5RRS JO50 (x3) 220315 +5 1760 DO5RRS DF7CB +07 (x2) 220400 -13 1760 DF7CB DO5RRS 73 193645 -12 781 9A3TGY DF7CB JO31 194130 +7 2089 DF7CB IZ7NLJ RR73 194200 -11 1900 DF7CB DL1DCT JO31 (x2) 194300 +4 540 SM6YRB DF7CB JO31 (x2) 194330 -8 1900 DF7CB DL1DCT JO31 194400 -2 540 SM6YRB DF7CB R-07 (x2)
UTC dB Audio Message 120645 -10 923 ZC4RH DF7CB JO31 (x3) 214815 +1 2226 RI1FJL DF7CB JO31 (x12)
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