DC7JZB — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving DC7JZB, decoded by SO8OO in southeastern Poland. 23 FT8 messages attributed to this token as transmitter, on 40m, across 1 UTC dates in the available aggregate history. Last observed 2026-09-17.
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 23 FT8 messages attributed to DC7JZB as the transmitting token by decoded message structure across 1 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (100%). In this small sample, the estimated median decoder S/N was -5 dB; no usual signal pattern is inferred.
Overview
Observed FT8 message patterns
- Attributed sample
- 23 messages
- Active dates
- 1 UTC dates
- Estimated median S/N
- -5 dB
- Estimated 10th-90th percentile
- -7 to -2 dB
- Recurring-pattern threshold
- Not met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 0, moderate (-15 to -9 dB) 1, strong (≥ -8 dB) 22.
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 DC7JZB in decoded directed-looking exchanges:
Most frequent locator attributed to DC7JZB
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
- JO62 · 15 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 675 km (approx.)
- Last such locator decoded
- 2026-09-17 18:05 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 | DC7JZB S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 09-17 18:16 | 40m | -7 / -11 | R3YH | 0 / - | 3 | ✓ Closing observed |
| 09-17 18:08 | 40m | -5 / - | R1BDX | -17 / -13 | 4 | ✓ Closing observed |
| 09-17 18:02 | 40m | - / -13 | G0RVY | +4 / - | 2 | ✓ Closing fragment |
| 09-17 17:55 | 40m | -6 / -19 | HZ1TT | -4 / -8 | 12 | ✓ Full exchange observed |
| 09-17 17:49 | 40m | - / -15 | RC5F | -2 / - | 4 | ✓ Closing fragment |
| 09-17 17:48 | 40m | -4 / - | RV6HEG | - / - | 2 | Partial capture |
| 09-17 17:45 | 40m | -5 / -19 | 9A3MRN | +6 / - | 3 | ✓ Closing observed |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 180230 +5 626 DC7JZB G0RVY 73 180415 -2 1993 CQ DC7JZB JO62 180430 -16 2416 DC7JZB RA9SJG -15 180445 -4 1994 CQ DC7JZB JO62 (x2) 180545 -4 1994 SQ9BDB DC7JZB -11 180745 -2 1994 SP9JP DC7JZB -08 180815 -5 1994 R1BDX DC7JZB -13 (x3) 181030 -17 1993 DC7JZB R1BDX 73 181630 +2 2094 DC7JZB R3YH -11 (x2) 181715 -7 1993 R3YH DC7JZB 73 183230 -4 2682 DC7JZB M0KYB -05
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