3Z4DX — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving 3Z4DX, decoded by SO8OO in southeastern Poland. 687 FT8 messages attributed to this token as transmitter, on 40m, across 2 UTC dates in the available aggregate history. Observed between 2026-10-02 and 2026-10-03.
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 687 FT8 messages attributed to 3Z4DX 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 (100%). In this small sample, the estimated median decoder S/N was -10 dB; no usual signal pattern is inferred.
Overview
Observed FT8 message patterns
- Attributed sample
- 687 messages
- Active dates
- 2 UTC dates
- Estimated median S/N
- -10 dB
- Estimated 10th-90th percentile
- -12 to -7 dB
- Recurring-pattern threshold
- Not met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 5, moderate (-15 to -9 dB) 507, strong (≥ -8 dB) 175.
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 3Z4DX 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 3Z4DX
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
- JO90 · 216 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 208 km (approx.)
- Last such locator decoded
- 2026-10-03 04:06 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 | 3Z4DX S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 10-03 04:08 | 40m | -8 / - | UB8LAR | - / -16 | 2 | Partial capture |
| 10-03 04:07 | 40m | -9 / - | KJ5PTH | - / -25 | 2 | Partial capture |
| 10-03 04:07 | 40m | -10 / 0 | R1BDX | -2 / +2 | 8 | ✓ Full exchange observed |
| 10-03 04:06 | 40m | -8 / +2 | US3EW | -8 / -7 | 4 | ✓ Full exchange observed |
| 10-03 04:04 | 40m | -9 / - | UB8LAR | - / -13 | 2 | Partial capture |
| 10-03 04:02 | 40m | -11 / +5 | YO9HP | +10 / - | 4 | ✓ Full exchange observed |
| 10-03 04:01 | 40m | -8 / - | DL9KM | - / +5 | 2 | ✓ Closing fragment |
| 10-03 04:00 | 40m | -10 / - | PY2DPM | - / -19 | 2 | Partial capture |
| 10-03 03:59 | 40m | -10 / - | HA5VQ | - / -25 | 2 | Partial capture |
| 10-03 03:57 | 40m | - / 0 | DL8TV | -11 / - | 4 | ✓ Closing fragment |
| 10-03 03:57 | 40m | -11 / - | EW4DX | - / -19 | 2 | ✓ Closing fragment |
| 10-03 03:53 | 40m | -11 / +1 | R4IK | -6 / - | 3 | ✓ Closing observed |
| 10-03 03:50 | 40m | - / +4 | RN1CW | -11 / - | 4 | ✓ Closing fragment |
| 10-03 03:50 | 40m | - / +5 | HF1Z | -16 / - | 2 | Partial capture |
| 10-03 03:43 | 40m | - / +3 | HF1Z | -24 / - | 2 | Partial capture |
| 10-03 03:38 | 40m | -8 / - | UA4WJ | -24 / +2 | 3 | ✓ Closing observed |
| 10-03 03:36 | 40m | -8 / - | UT2AU | +4 / - | 5 | ✓ Full exchange observed |
| 10-03 03:34 | 40m | -8 / - | RV3IO | -1 / +3 | 3 | ✓ Closing observed |
| 10-03 03:33 | 40m | -10 / - | YO4ATW | - / -18 | 2 | ✓ Closing fragment |
| 10-03 03:30 | 40m | -11 / - | R6DOP | -6 / 0 | 5 | ✓ Full exchange observed |
| 10-03 03:28 | 40m | -14 / - | RA3AJT | +5 / - | 2 | ✓ Closing observed |
| 10-03 03:27 | 40m | -14 / - | LA3RLA | - / -13 | 2 | ✓ Closing fragment |
| 10-03 03:23 | 40m | -12 / - | YO4ATW | - / -17 | 2 | Partial capture |
| 10-03 03:22 | 40m | -10 / - | DM1EE | - / -15 | 2 | ✓ Closing fragment |
| 10-03 03:19 | 40m | -13 / - | OH6IH | -8 / - | 2 | ✓ Closing observed |
| 10-03 03:14 | 40m | -9 / -3 | DJ0BS | -12 / -8 | 8 | ✓ Full exchange observed |
| 10-03 03:13 | 40m | -11 / - | DJ4WM | -2 / -6 | 2 | Partial capture |
| 10-03 03:10 | 40m | -12 / - | K8SMS | - / -14 | 2 | ✓ Closing fragment |
| 10-03 03:07 | 40m | -10 / - | YO4ATW | - / -18 | 3 | Partial capture |
| 10-03 03:06 | 40m | -6 / - | RN6HGI | -9 / +3 | 3 | ✓ Closing observed |
| 10-03 03:05 | 40m | -6 / - | OH8KFN | +1 / +1 | 5 | ✓ Full exchange observed |
| 10-03 03:01 | 40m | -9 / +3 | YO6GLT | +10 / -2 | 4 | ✓ Full exchange observed |
| 10-03 02:58 | 40m | -9 / - | PY2DMX | - / -18 | 2 | ✓ Closing fragment |
| 10-03 02:54 | 40m | -8 / - | F4MXT/P | +5 / +8 | 5 | ✓ Full exchange observed |
| 10-03 02:51 | 40m | -10 / - | US5EAA | - / +9 | 2 | ✓ Closing fragment |
| 10-03 02:48 | 40m | -10 / - | KC2IXN | - / -15 | 2 | ✓ Closing fragment |
| 10-03 02:47 | 40m | -10 / - | WA8EQP | - / -20 | 2 | Partial capture |
| 10-03 02:46 | 40m | -11 / - | KC2NJ | - / -9 | 2 | ✓ Closing fragment |
| 10-03 02:45 | 40m | - / - | DJ0BS | -15 / - | 4 | Partial capture |
| 10-03 02:44 | 40m | -12 / - | KR4FOH | - / -20 | 2 | ✓ Closing fragment |
| 10-03 02:43 | 40m | -11 / - | CX6TU | - / -21 | 2 | ✓ Closing fragment |
| 10-03 02:40 | 40m | -10 / - | W8NIN | - / -19 | 2 | ✓ Closing fragment |
| 10-03 02:38 | 40m | -10 / - | RK4CH | -9 / +6 | 3 | Partial capture |
| 10-03 02:34 | 40m | - / -6 | WB8BPU | -6 / - | 3 | ✓ Closing fragment |
| 10-03 02:33 | 40m | -10 / - | R7MP | -21 / -9 | 3 | ✓ Closing observed |
| 10-03 02:27 | 40m | -9 / - | EA2BUW | - / -17 | 2 | Partial capture |
| 10-03 02:25 | 40m | -10 / 0 | IK4TVP | -15 / -16 | 10 | ✓ Full exchange observed |
| 10-03 02:25 | 40m | -8 / +5 | UB6OFG | +14 / +8 | 6 | ✓ Full exchange observed |
| 10-03 02:20 | 40m | -8 / +6 | R6OK | +2 / +6 | 5 | ✓ Full exchange observed |
| 10-03 02:19 | 40m | - / +10 | KZ4NS | -8 / - | 2 | ✓ Closing fragment |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 040645 -8 635 3Z4DX US3EW R+02 040700 -9 635 US3EW 3Z4DX RR73 040715 +3 635 3Z4DX R1BDX +00 040730 -10 635 KJ5PTH 3Z4DX -25 040745 -2 635 3Z4DX R1BDX +00 040800 -8 635 KJ5PTH 3Z4DX -25 040815 +3 635 3Z4DX R1BDX +00 040830 -10 635 UB8LAR 3Z4DX -16 040845 -6 635 3Z4DX R1BDX +00 040900 -7 635 UB8LAR 3Z4DX -16 040915 -9 635 3Z4DX R1BDX +00 040930 -11 635 R1BDX 3Z4DX R+02 040945 +0 635 3Z4DX R1BDX RR73 041000 -9 635 R1BDX 3Z4DX RR73 041030 -9 635 EA5D 3Z4DX -07
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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