SQ5CZJ — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving SQ5CZJ, decoded by SO8OO in southeastern Poland. 152 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, across 24 UTC dates in the available aggregate history. Observed between 2026-07-09 and 2026-09-06.
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 152 FT8 messages attributed to SQ5CZJ as the transmitting token by decoded message structure across 24 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (57%), followed by 80 m (37%) and 20 m (7%). Most decodes (63%) fell within the six-hour window 15:00-21:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -7 dB.
Overview
Bands
Last attributed message: 2026-09-06 08:56 UTC
Observed FT8 message patterns
- Attributed sample
- 152 messages
- Active dates
- 24 UTC dates
- Estimated median S/N
- -7 dB
- Estimated 10th-90th percentile
- -17 to +2 dB
- Recurring-pattern threshold
- Met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 26, moderate (-15 to -9 dB) 37, strong (≥ -8 dB) 89.
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 SQ5CZJ 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 SQ5CZJ
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
- JO92 · 93 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 345 km (approx.)
- Last such locator decoded
- 2026-09-03 13:19 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 | SQ5CZJ S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 09-06 08:53 | 40m | -15 / +4 | DL0MRR | -2 / +2 | 5 | Partial capture |
| 09-03 13:15 | 40m | -5 / - | OE8PIT | - / - | 7 | Partial capture |
| 08-29 19:13 | 80m | -2 / - | EC5M | - / - | 2 | Partial capture |
| 08-29 19:08 | 80m | -2 / -15 | LZ2VQ | -2 / -9 | 9 | ✓ Full exchange observed |
| 08-29 19:06 | 80m | +3 / +3 | SP9CXN | +15 / +10 | 11 | ✓ Full exchange observed |
| 08-28 16:17 | 40m | - / - | F5RRS | -3 / - | 4 | Partial capture |
| 08-28 16:12 | 40m | 0 / - | <...> | -2 / +6 | 7 | ✓ Closing fragment |
| 08-28 16:04 | 40m | 0 / - | <...> | - / - | 2 | Partial capture |
| 08-28 15:46 | 40m | - / - | F5RRS | -8 / - | 4 | Partial capture |
| 08-28 11:01 | 40m | -7 / -5 | SQ3WL | -6 / +9 | 7 | ✓ Full exchange observed |
| 08-28 06:06 | 20m | - / -16 | YO4NT | +4 / - | 2 | ✓ Closing fragment |
| 08-26 17:27 | 40m | -10 / +3 | SP9DOU | +2 / - | 4 | ✓ Closing observed |
| 08-26 17:25 | 40m | -14 / - | IK0CHU | - / - | 2 | Partial capture |
| 08-26 15:58 | 40m | - / -11 | SQ3WL | +4 / - | 3 | Partial capture |
| 08-22 11:54 | 40m | - / -13 | DM5JBN | -7 / - | 2 | ✓ Closing fragment |
| 08-20 09:14 | 40m | -11 / - | SQ5OMY | -3 / - | 6 | ✓ Full exchange observed |
| 08-20 08:47 | 40m | -14 / -16 | HA3GO | -16 / -5 | 4 | ✓ Full exchange observed |
| 08-20 08:39 | 40m | -7 / - | G4YAN | - / -4 | 5 | ✓ Closing fragment |
| 08-20 08:36 | 40m | -14 / -7 | HA0AA | -13 / - | 4 | ✓ Full exchange observed |
| 08-20 08:32 | 40m | -6 / - | F4NEY | - / -6 | 7 | ✓ Closing fragment |
| 08-20 07:27 | 40m | - / - | DM5KK | +8 / - | 3 | Partial capture |
| 08-20 07:14 | 40m | -18 / - | F4NGR | - / - | 3 | Partial capture |
| 08-20 06:51 | 40m | - / -19 | RY2B | -20 / - | 2 | Partial capture |
| 08-19 19:19 | 40m | - / -9 | UX7QG | -9 / - | 4 | ✓ Closing fragment |
| 08-19 06:49 | 40m | -23 / - | DK7ZT | -20 / -18 | 3 | ✓ Closing observed |
| 08-19 06:39 | 40m | - / -13 | HA1ZW | -16 / - | 3 | ✓ Closing fragment |
| 08-19 06:21 | 40m | -20 / - | 9A4BP/P | - / +2 | 2 | Partial capture |
| 08-18 19:14 | 40m | - / -3 | SQ5OMY | -5 / - | 2 | ✓ Closing fragment |
| 08-18 19:10 | 40m | - / -10 | SP5ROM | -16 / - | 3 | Partial capture |
| 08-18 17:12 | 40m | -10 / - | DL9OE | 0 / - | 4 | ✓ Closing observed |
| 08-18 17:09 | 40m | -16 / - | SP5ROM | - / - | 2 | Partial capture |
| 08-18 17:06 | 40m | - / -11 | HA1DUQ | -15 / - | 6 | ✓ Closing fragment |
| 08-18 15:17 | 20m | - / -10 | F5SFT | -14 / - | 3 | ✓ Closing fragment |
| 08-16 19:13 | 40m | -10 / - | I8OHQ | - / - | 2 | Partial capture |
| 08-16 18:35 | 40m | -17 / -8 | SP6VXO | -10 / -15 | 5 | ✓ Full exchange observed |
| 08-15 16:26 | 20m | - / -11 | CR5VP | -13 / - | 2 | ✓ Closing fragment |
| 08-15 07:04 | 20m | - / -3 | RK4FF | -2 / - | 4 | Partial capture |
| 08-15 06:51 | 20m | - / -3 | F6DZU | -3 / - | 3 | ✓ Closing fragment |
| 08-13 20:19 | 40m | - / -13 | ER1CW | -10 / - | 4 | ✓ Closing fragment |
| 08-13 19:35 | 80m | - / -18 | SQ5NO | -9 / - | 3 | ✓ Closing fragment |
| 08-13 19:27 | 80m | -13 / -22 | OL900CO | +5 / +3 | 4 | Partial capture |
| 08-12 08:55 | 40m | - / -4 | SP8RPA | -10 / - | 2 | ✓ Closing fragment |
| 08-11 20:22 | 80m | -7 / -7 | SP7VCL | +8 / - | 5 | ✓ Full exchange observed |
| 08-11 19:56 | 20m | - / -24 | HA1BF | -12 / - | 12 | ✓ Closing fragment |
| 08-11 07:36 | 20m | - / -22 | R6OP | -4 / - | 2 | ✓ Closing fragment |
| 08-09 11:02 | 20m | - / -11 | YO6LM | -10 / - | 2 | Partial capture |
| 08-04 19:34 | 80m | -1 / - | DO2PY | - / -12 | 9 | Partial capture |
| 08-04 19:33 | 80m | - / - | 9A4ZM | +12 / - | 3 | Partial capture |
| 08-04 19:32 | 80m | 0 / -11 | SP2LMG | -1 / +6 | 5 | ✓ Full exchange observed |
| 08-04 17:49 | 80m | +3 / -2 | SP9TEX | +9 / - | 2 | ✓ Closing observed |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 161815 -2 1990 SQ5CZJ F5RRS JN36 (x3) 131545 -2 342 OE8PIT SQ5CZJ JO92 (x7) 085300 -4 1494 SQ5CZJ DL0MRR +04 (x2) 085345 -16 1496 DL0MRR SQ5CZJ R+02 (x3)
UTC dB Audio Message 190745 +15 839 SQ5CZJ SP9CXN +02 190800 +2 840 SP9CXN SQ5CZJ R+10 190815 +19 839 SQ5CZJ SP9CXN RR73 190830 +2 839 SP9CXN SQ5CZJ 73 190845 -2 839 SQ5CZJ LZ2VQ KN23 (x3) 191000 -2 839 LZ2VQ SQ5CZJ -09 191015 +1 840 SQ5CZJ LZ2VQ R-15 191030 +0 840 LZ2VQ SQ5CZJ -09 191045 -2 840 SQ5CZJ LZ2VQ R-15 191100 -4 839 LZ2VQ SQ5CZJ RR73 191115 -6 840 SQ5CZJ LZ2VQ 73 191315 -6 1081 EC5M SQ5CZJ JO92 (x2)
UTC dB Audio Message 065100 -6 958 SQ5CZJ F6DZU -03 (x3) 070400 -6 1268 SQ5CZJ RK4FF -03 (x4) 162645 -12 1276 SQ5CZJ CR5VP -11 (x2) 151345 -13 699 SQ5CZJ GM3DRA RR73 151715 -12 1280 SQ5CZJ F5SFT -10 (x3) 060630 +3 1741 SQ5CZJ YO4NT -16 (x2)
UTC dB Audio Message 200830 -5 617 SQ5CZJ SV2CLJ -16 (x2)
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