3Z4DX — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving 3Z4DX, decoded by SO8OO in southeastern Poland. 1,443 FT8 messages attributed to this token as transmitter, on 160m, 40m, across 4 UTC dates in the available aggregate history. Observed between 2026-10-02 and 2026-10-05.
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 1,443 FT8 messages attributed to 3Z4DX as the transmitting token by decoded message structure across 4 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (97%), followed by 160 m (3%). Most decodes (64%) fell within the six-hour window 00:00-06:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -9 dB.
Overview
Bands
Last attributed message: 2026-10-05 06:12 UTC
Observed FT8 message patterns
- Attributed sample
- 1,443 messages
- Active dates
- 4 UTC dates
- Estimated median S/N
- -9 dB
- Estimated 10th-90th percentile
- -12 to -3 dB
- Recurring-pattern threshold
- Met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 8, moderate (-15 to -9 dB) 826, strong (≥ -8 dB) 609.
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 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 · 583 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 208 km (approx.)
- Last such locator decoded
- 2026-10-05 06:08 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 |
|---|---|---|---|---|---|---|
| 10-05 06:10 | 40m | +20 / - | G0BLB | -13 / 0 | 5 | ✓ Full exchange observed |
| 10-05 06:09 | 40m | +20 / - | DK7UY | - / - | 2 | ✓ Closing fragment |
| 10-05 06:09 | 40m | +21 / - | IK4RVY | -6 / +3 | 9 | ✓ Full exchange observed |
| 10-05 06:08 | 40m | +20 / - | SQ8V | - / - | 2 | ✓ Closing fragment |
| 10-05 06:07 | 40m | +20 / - | R6LKG | - / -21 | 2 | ✓ Closing fragment |
| 10-05 06:05 | 40m | +20 / - | DH1HF | -18 / -9 | 5 | ✓ Closing observed |
| 10-05 06:04 | 40m | +20 / - | SA7BYQ | - / -5 | 2 | ✓ Closing fragment |
| 10-05 06:03 | 40m | +20 / - | UR0GK | - / -2 | 2 | Partial capture |
| 10-05 06:00 | 40m | +21 / +1 | SM7HZK | -9 / -9 | 6 | ✓ Full exchange observed |
| 10-05 05:56 | 40m | +21 / - | EA3FNM | - / -15 | 4 | ✓ Closing fragment |
| 10-05 05:55 | 40m | +18 / - | SQ3PMX | - / -22 | 2 | ✓ Closing fragment |
| 10-05 05:53 | 40m | +15 / - | SP1MGM | - / -15 | 3 | Partial capture |
| 10-05 05:52 | 40m | +19 / - | PD1WS | -14 / -1 | 4 | ✓ Full exchange observed |
| 10-05 05:50 | 40m | +20 / - | PE1NCF | - / -8 | 2 | ✓ Closing fragment |
| 10-05 05:47 | 40m | +14 / - | PA3CPS | +2 / - | 5 | ✓ Full exchange observed |
| 10-05 05:46 | 40m | -1 / - | SP4MPH | - / -19 | 2 | ✓ Closing fragment |
| 10-05 05:45 | 40m | -8 / - | UT4PA | - / -15 | 2 | ✓ Closing fragment |
| 10-05 05:43 | 40m | -7 / - | PA0LDE | -10 / 0 | 5 | ✓ Full exchange observed |
| 10-05 05:42 | 40m | -6 / - | M9PAS | - / -4 | 2 | ✓ Closing fragment |
| 10-05 05:40 | 40m | -8 / -3 | F1MXE | -7 / - | 4 | ✓ Closing observed |
| 10-05 05:38 | 40m | -7 / - | G0BLS | - / -10 | 3 | ✓ Closing fragment |
| 10-05 05:36 | 40m | - / - | DL6UM | -7 / - | 7 | Partial capture |
| 10-05 05:35 | 40m | -4 / +3 | DG1ROL | +2 / +1 | 5 | ✓ Full exchange observed |
| 10-05 05:34 | 40m | -8 / - | M0KSE | - / -11 | 3 | ✓ Closing fragment |
| 10-05 05:33 | 40m | -8 / - | IU1TKT | -7 / -14 | 3 | ✓ Closing observed |
| 10-05 05:30 | 40m | -5 / - | EU6KA | - / -10 | 2 | ✓ Closing fragment |
| 10-05 05:28 | 40m | -6 / -1 | EA4KZ | -14 / -16 | 6 | ✓ Full exchange observed |
| 10-05 05:23 | 40m | -8 / - | F5ILV | - / -20 | 3 | ✓ Closing fragment |
| 10-05 05:21 | 40m | -4 / - | F4LSG | - / -12 | 2 | Partial capture |
| 10-05 05:20 | 40m | -6 / - | R4SF | - / -13 | 2 | ✓ Closing fragment |
| 10-05 05:19 | 40m | -6 / - | R2DAR | - / -11 | 2 | ✓ Closing fragment |
| 10-05 05:18 | 40m | -8 / - | UA9CK | - / -7 | 2 | ✓ Closing fragment |
| 10-05 05:16 | 40m | -8 / - | R6AC | - / -19 | 2 | ✓ Closing fragment |
| 10-05 05:13 | 40m | -10 / 0 | EA3IZF | -20 / -16 | 4 | Partial capture |
| 10-05 05:11 | 40m | -8 / - | R3WF | -8 / - | 5 | ✓ Closing observed |
| 10-05 05:10 | 40m | -10 / -3 | RW9AW | -13 / +2 | 5 | ✓ Full exchange observed |
| 10-05 05:10 | 40m | -13 / -5 | EA5PS | -14 / - | 3 | ✓ Closing observed |
| 10-05 05:07 | 40m | - / - | UA3WG | -8 / - | 2 | ✓ Closing fragment |
| 10-05 05:06 | 40m | - / +9 | R6KX | 0 / - | 4 | ✓ Closing fragment |
| 10-05 05:03 | 40m | -10 / -4 | F4FSY | -18 / -7 | 3 | ✓ Full exchange observed |
| 10-05 04:51 | 40m | -10 / - | G3TKT | - / -18 | 3 | ✓ Closing fragment |
| 10-05 04:47 | 40m | -11 / - | UA9FLI | - / 0 | 2 | ✓ Closing fragment |
| 10-05 04:24 | 40m | -9 / - | RL3T | -18 / -1 | 4 | ✓ Closing observed |
| 10-05 04:23 | 40m | -8 / -3 | RU7C | -15 / -3 | 3 | ✓ Full exchange observed |
| 10-05 04:16 | 40m | -9 / -3 | F4PCM | -12 / -13 | 5 | ✓ Full exchange observed |
| 10-05 04:16 | 40m | -7 / +9 | YO3BMI | 0 / 0 | 6 | Partial capture |
| 10-05 04:13 | 40m | -9 / -5 | RW9AD | -11 / - | 2 | ✓ Closing observed |
| 10-05 04:11 | 40m | -10 / - | US1EA | -15 / +2 | 4 | ✓ Closing observed |
| 10-05 04:08 | 40m | - / - | IW0RLC | -6 / - | 3 | ✓ Closing fragment |
| 10-05 04:06 | 40m | - / -8 | HA5VQ | +4 / - | 3 | ✓ Closing fragment |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 060930 +20 796 DK7UY 3Z4DX +12 060945 -2 1896 3Z4DX IK4RVY JN64 061000 +21 796 DK7UY 3Z4DX RR73 061015 -2 1896 3Z4DX IK4RVY JN64 061030 +20 796 G0BLB 3Z4DX +00 061045 -7 1896 3Z4DX IK4RVY JN64 061100 +20 796 G0BLB 3Z4DX +00 061115 -14 1896 3Z4DX IK4RVY JN64 061130 +21 796 IK4RVY 3Z4DX +03 061145 -6 1896 3Z4DX IK4RVY R+22 061145 -16 2219 3Z4DX G0BLB R+11 061200 +21 796 IK4RVY 3Z4DX RR73 061215 -9 1896 3Z4DX IK4RVY 73 061215 -14 2220 3Z4DX G0BLB IO81 (x2)
UTC dB Audio Message 032400 +19 761 CQ 3Z4DX JO90 (x2) 032445 -1 1783 3Z4DX UA3ZUX KO90 032500 +19 761 UA3ZUX 3Z4DX +01 032515 +2 1783 3Z4DX UA3ZUX R-03 032530 +20 761 UA3ZUX 3Z4DX RR73 032545 +2 1783 3Z4DX UA3ZUX 73 032600 +21 761 CQ 3Z4DX JO90 (x3) 032715 -20 202 3Z4DX SQ2BXI JO94 032730 +19 761 CQ 3Z4DX JO90 032745 -22 203 3Z4DX SQ2BXI JO94 032800 +23 761 SQ2BXI 3Z4DX -07 (x2)
UTC dB Audio Message 215145 -12 1274 3Z4DX IK6BSN JN62 (x12) 021545 -13 1792 3Z4DX IU6STP JN63
UTC dB Audio Message 170015 -8 1413 3Z4DX EB1LA IN73 (x2) 170215 -4 532 3Z4DX EA4EOG IN70 (x3) 171145 -2 753 3Z4DX EB5DQ R+01
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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