DF7JC — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving DF7JC, decoded by SO8OO in southeastern Poland. 24 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, 10m, across 5 UTC dates in the available aggregate history. Observed between 2026-06-27 and 2026-07-16.
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 24 FT8 messages attributed to DF7JC as the transmitting token by decoded message structure across 5 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (42%), followed by 20 m (25%) and 80 m (17%). Most decodes (58%) fell within the six-hour window 14:00-20:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -11 dB.
Overview
Bands
Last attributed message: 2026-07-16 05:50 UTC
Observed FT8 message patterns
- Attributed sample
- 24 messages
- Active dates
- 5 UTC dates
- Estimated median S/N
- -11 dB
- Estimated 10th-90th percentile
- -17 to -3 dB
- Recurring-pattern threshold
- Met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 5, moderate (-15 to -9 dB) 11, strong (≥ -8 dB) 8.
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 DF7JC 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 DF7JC
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 · 16 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 1,054 km (approx.)
- Last such locator decoded
- 2026-07-16 05:50 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 | DF7JC S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 07-16 05:42 | 40m | -5 / - | CR7BRV | - / -8 | 3 | ✓ Closing fragment |
| 07-16 05:38 | 40m | - / -12 | F5RRS | -20 / - | 4 | ✓ Closing fragment |
| 07-13 14:46 | 10m | -6 / - | YL2GJX | - / -7 | 4 | ✓ Closing fragment |
| 07-13 05:55 | 20m | -14 / - | N8A | - / - | 2 | Partial capture |
| 07-09 17:52 | 40m | -13 / - | <...> | - / - | 4 | Partial capture |
| 07-08 19:02 | 80m | -11 / - | <...> | - / - | 4 | Partial capture |
| 07-08 19:02 | 80m | - / -20 | YR50NADIA | +6 / - | 2 | Partial capture |
| 07-08 17:37 | 20m | -3 / -16 | D2UY | -7 / - | 3 | ✓ Closing observed |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 175245 -15 2529 <...> DF7JC JO31 (x4) 053700 -18 2309 AC4WW DF7JC R-12 053815 -20 1953 DF7JC F5RRS JN36 (x4) 054230 -6 689 CR7BRV DF7JC JO31 (x3) 054900 -17 1974 OA4ENG DF7JC JO31 055045 -12 2294 <...> DF7JC JO31
UTC dB Audio Message 144645 -1 2514 YL2GJX DF7JC JO31 (x4)
UTC dB Audio Message 104845 -16 1963 <...> DF7JC R-16 105130 -7 2314 DF7JC <...> +09 173745 -3 2929 D2UY DF7JC JO31 173800 -7 2670 DF7JC D2UY -16 173845 -3 2929 D2UY DF7JC 73 173900 +7 2929 DF7JC YO4NF -15 131830 -24 1510 <...> DF7JC R-02 131915 -7 2729 DF7JC S57BTI JN75 055545 -17 855 N8A DF7JC JO31 (x2)
UTC dB Audio Message 190230 +3 2156 DF7JC YR50NADIA -20 190245 -10 1437 <...> DF7JC JO31 190300 +8 2156 DF7JC YR50NADIA -20 190345 -13 1437 <...> DF7JC JO31 (x3) 190600 +2 2156 DF7JC RR73; R4CHN <...> -10
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.
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