UB4CLH — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving UB4CLH, decoded by SO8OO in southeastern Poland. 884 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, across 54 UTC dates in the available aggregate history. Observed between 2026-06-21 and 2026-10-07.
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 884 FT8 messages attributed to UB4CLH as the transmitting token by decoded message structure across 54 UTC dates in the available aggregate history. The largest monitored-band total was 80 m (44%), followed by 40 m (33%) and 20 m (23%). Most decodes (96%) 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 -15 dB.
Overview
Bands
Last attributed message: 2026-10-07 16:59 UTC
Observed FT8 message patterns
- Attributed sample
- 884 messages
- Active dates
- 54 UTC dates
- Estimated median S/N
- -15 dB
- Estimated 10th-90th percentile
- -22 to -5.1 dB
- Recurring-pattern threshold
- Met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 430, moderate (-15 to -9 dB) 291, strong (≥ -8 dB) 163.
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 UB4CLH 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 UB4CLH
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
- LO22 · 214 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 1,634 km (approx.)
- Last such locator decoded
- 2026-10-07 15:38 UTC
Other locator fields attributed to this token: LO21 (2).
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 | UB4CLH S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 10-07 16:59 | 80m | -23 / -7 | UA1CKA | +5 / -10 | 3 | ✓ Full exchange observed |
| 10-07 16:57 | 80m | - / -6 | R2SN | -4 / - | 2 | ✓ Closing fragment |
| 10-07 16:56 | 80m | - / -6 | RU3OH | -13 / - | 2 | Partial capture |
| 10-07 16:56 | 80m | - / -8 | RA5AK | -2 / - | 2 | ✓ Closing fragment |
| 10-07 16:55 | 80m | - / +2 | R4DS | -9 / - | 2 | ✓ Closing fragment |
| 10-07 15:41 | 80m | - / -16 | RA1TR | +1 / - | 7 | ✓ Closing fragment |
| 10-07 14:53 | 80m | - / - | RA3UEV | -4 / - | 2 | ✓ Closing fragment |
| 10-06 17:06 | 80m | - / +6 | RY4C | -8 / - | 2 | ✓ Closing fragment |
| 10-06 16:36 | 40m | - / -2 | DB2OE | +10 / - | 5 | ✓ Closing fragment |
| 10-06 16:34 | 40m | - / -26 | RW1CW | -14 / - | 2 | Partial capture |
| 10-06 15:58 | 40m | - / -15 | 9A7BB | -4 / - | 2 | ✓ Closing fragment |
| 10-04 16:58 | 80m | - / -15 | RA3WY | 0 / - | 4 | ✓ Closing fragment |
| 10-04 16:54 | 80m | -15 / -2 | R3DPZ | +2 / -10 | 3 | Partial capture |
| 10-04 15:47 | 40m | - / -12 | R3DMX | -12 / - | 2 | ✓ Closing fragment |
| 10-04 15:42 | 40m | - / - | DG9FEH | -13 / - | 7 | Partial capture |
| 10-04 15:38 | 40m | - / - | DL1EFX | -18 / - | 2 | Partial capture |
| 10-04 15:37 | 40m | -19 / - | R8ACF | -15 / -12 | 2 | Partial capture |
| 10-04 13:57 | 40m | - / -4 | R6LI | -15 / - | 3 | ✓ Closing fragment |
| 10-04 13:55 | 40m | - / -5 | RK3YWS/P | -8 / - | 2 | ✓ Closing fragment |
| 10-04 13:54 | 40m | - / +5 | UA3IDQ | -4 / - | 2 | ✓ Closing fragment |
| 10-04 05:34 | 40m | - / -14 | DL2RPN | -5 / - | 3 | ✓ Closing fragment |
| 10-04 05:30 | 40m | - / - | RA3X | -4 / - | 2 | ✓ Closing fragment |
| 10-03 17:17 | 80m | -16 / - | LY8O | - / -15 | 2 | Partial capture |
| 10-03 17:14 | 80m | - / +2 | RW4F | -8 / - | 3 | ✓ Closing fragment |
| 10-03 17:08 | 80m | -23 / +2 | R2APC | -7 / - | 4 | ✓ Closing observed |
| 10-03 17:05 | 80m | -22 / - | RA4AHN | - / -13 | 2 | ✓ Closing fragment |
| 10-03 17:03 | 80m | -23 / -3 | R3ZBY | -17 / -2 | 3 | ✓ Full exchange observed |
| 10-03 17:02 | 80m | -17 / -10 | UA6BGM | -2 / - | 3 | ✓ Closing observed |
| 10-03 16:57 | 40m | - / -11 | R6OK | -6 / - | 2 | ✓ Closing fragment |
| 10-03 16:52 | 40m | -23 / -3 | EW1ACG | -4 / - | 3 | ✓ Closing observed |
| 10-03 13:53 | 40m | - / -14 | R3YAX | -16 / - | 2 | ✓ Closing fragment |
| 10-03 13:39 | 40m | - / -25 | SQ4DX | -13 / - | 4 | Partial capture |
| 10-02 16:41 | 80m | - / -3 | R6LI | +3 / - | 3 | Partial capture |
| 10-02 16:08 | 80m | -19 / -19 | SP7VCL | +9 / -15 | 7 | ✓ Full exchange observed |
| 10-01 16:36 | 80m | -23 / - | EU2ABM | -5 / -12 | 2 | ✓ Closing observed |
| 10-01 16:30 | 80m | - / -14 | R1TET | -18 / - | 6 | Partial capture |
| 10-01 16:15 | 80m | -23 / - | UA4HBR | -24 / -1 | 2 | ✓ Closing observed |
| 09-30 16:56 | 80m | -24 / - | RG6OR | -17 / -7 | 2 | ✓ Closing observed |
| 09-30 16:45 | 80m | - / -2 | RC9WC | -10 / - | 2 | ✓ Closing fragment |
| 09-30 16:43 | 80m | - / -14 | EW6BZ | +5 / - | 2 | ✓ Closing fragment |
| 09-28 16:29 | 40m | -15 / - | RU3DOK | - / -3 | 2 | Partial capture |
| 09-28 16:16 | 40m | -20 / -15 | HA3HZ | +4 / -18 | 3 | ✓ Full exchange observed |
| 09-28 15:13 | 40m | - / +2 | RD6OX | +3 / - | 2 | ✓ Closing fragment |
| 09-28 15:12 | 40m | - / - | DL6EL | +2 / - | 3 | Partial capture |
| 09-28 15:11 | 40m | -24 / -2 | R3DIH | -4 / +1 | 3 | ✓ Full exchange observed |
| 09-27 14:31 | 40m | - / -4 | RN3QTA | -6 / - | 2 | Partial capture |
| 09-27 06:59 | 40m | - / -17 | DF0PDF | -6 / - | 3 | ✓ Closing fragment |
| 09-27 06:56 | 40m | - / -11 | SP9ODY | -7 / - | 2 | ✓ Closing fragment |
| 09-27 06:18 | 40m | - / -9 | UF2F | +4 / - | 3 | ✓ Closing fragment |
| 09-26 20:44 | 80m | -23 / - | SN100PKP | - / - | 2 | Partial capture |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 154230 -4 1380 UB4CLH RA1TR -16 (x4) 165500 -6 1223 UB4CLH R4DS R+02 (x2) 165600 -2 2208 UB4CLH RA5AK R-08 165630 -11 1813 UB4CLH RU3OH KO90 165630 -2 2208 UB4CLH RA5AK 73 165700 -15 1813 UB4CLH RU3OH R-06 165730 -5 1256 UB4CLH R2SN -06 (x2) 165915 +8 2313 UB4CLH UA1CKA -07 165930 -23 1872 UA1CKA UB4CLH R-10 165945 +2 2313 UB4CLH UA1CKA RR73
UTC dB Audio Message 182515 -18 1794 UB4CLH M0CQL IO93 155845 -5 594 UB4CLH 9A7BB R-15 (x2) 160030 -19 936 UB4CLH R5VCR R+00 160145 -18 2064 RA9MI UB4CLH RR73 160215 -20 2063 CQ UB4CLH LO22 (x2) 160415 -17 2065 R3PCB UB4CLH -14 163415 -13 1899 UB4CLH RW1CW R-26 (x2) 163615 +9 676 UB4CLH DB2OE R-02 (x5)
UTC dB Audio Message 165245 -10 2285 BG7BMG UB4CLH -18 (x2) 165345 -9 2285 CQ UB4CLH LO22 (x4) 165615 -7 1915 EP2AES UB4CLH -17 165645 -9 1915 YO7VNS UB4CLH -13 (x2) 165745 -9 1915 EP2AES UB4CLH -12 (x2) 165845 -11 1915 SQ5PTZ UB4CLH -06 (x2) 170145 -11 1915 EP2AES UB4CLH -11 170215 -7 1915 CQ UB4CLH LO22
UTC dB Audio Message 184400 -1 2760 UB4CLH RA1TI 73 184600 -7 1073 UB4CLH RV3LO KO64 (x9) 073615 -20 2091 UB4CLH UA4FKT LO23 (x2) 081730 +2 2641 UB4CLH F1PBZ -18 (x3)
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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