YL3CW — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving YL3CW, decoded by SO8OO in southeastern Poland. 4,072 FT8 messages attributed to this token as transmitter, on 160m, 80m, 60m, 40m, 20m, 10m, across 76 UTC dates in the available aggregate history. Observed between 2026-06-07 and 2026-10-08.
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 4,072 FT8 messages attributed to YL3CW as the transmitting token by decoded message structure across 76 UTC dates in the available aggregate history. The largest monitored-band total was 160 m (36%), followed by 80 m (30%) and 40 m (29%). Most decodes (85%) fell within the six-hour window 15:00-21:00 UTC. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (80%); the estimated median was -1.3 dB.
Overview
Bands
Last attributed message: 2026-10-08 17:04 UTC
Observed FT8 message patterns
- Attributed sample
- 4,072 messages
- Active dates
- 76 UTC dates
- Estimated median S/N
- -1.3 dB
- Estimated 10th-90th percentile
- -12 to +9 dB
- Recurring-pattern threshold
- Met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 169, moderate (-15 to -9 dB) 657, strong (≥ -8 dB) 3,246.
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 YL3CW 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 YL3CW
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
- KO36 · 2,717 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 807 km (approx.)
- Last such locator decoded
- 2026-10-08 17:04 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 | YL3CW S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 10-08 17:00 | 160m | +6 / 0 | UA1CKA | +1 / +2 | 6 | ✓ Full exchange observed |
| 10-08 16:57 | 160m | - / - | UB3IBG | -7 / - | 2 | Partial capture |
| 10-08 16:54 | 160m | - / - | YO6FNF | -10 / - | 2 | Partial capture |
| 10-08 16:53 | 160m | +8 / - | RX6DA | - / -11 | 2 | Partial capture |
| 10-08 16:42 | 160m | - / - | OM3SX | +14 / - | 2 | Partial capture |
| 10-08 16:41 | 160m | - / - | RX6DA | -16 / - | 6 | Partial capture |
| 10-08 16:41 | 160m | - / - | YO6FNF | -11 / - | 3 | Partial capture |
| 10-08 16:23 | 160m | +13 / - | RA6FCU/P | - / -7 | 3 | ✓ Closing fragment |
| 10-08 14:16 | 80m | +4 / - | <...> | - / - | 19 | Partial capture |
| 10-08 13:43 | 40m | -4 / - | HB9IJU | - / -10 | 2 | Partial capture |
| 10-07 20:01 | 160m | - / - | 9H1ES | -12 / - | 2 | Partial capture |
| 10-07 19:59 | 160m | - / - | UT1EI | -3 / - | 3 | Partial capture |
| 10-07 19:56 | 160m | +2 / - | R3ND | - / -9 | 2 | ✓ Closing fragment |
| 10-07 19:54 | 160m | -4 / - | DL3HRZ | -11 / -4 | 5 | ✓ Full exchange observed |
| 10-07 19:54 | 160m | - / - | IK0XBX | 0 / - | 7 | Partial capture |
| 10-07 19:53 | 160m | +6 / +3 | PA3GCU | -17 / -18 | 3 | ✓ Full exchange observed |
| 10-07 19:47 | 160m | +5 / -10 | SV3GKU | +4 / +1 | 10 | ✓ Full exchange observed |
| 10-07 19:45 | 160m | -2 / - | UA3IDQ | -11 / - | 5 | Partial capture |
| 10-07 19:11 | 80m | - / - | R2BPS | -14 / - | 2 | Partial capture |
| 10-07 16:31 | 160m | +10 / - | RA9HO | - / -14 | 4 | ✓ Closing fragment |
| 10-07 16:28 | 160m | - / - | SP9ENV | +4 / - | 2 | Partial capture |
| 10-07 16:25 | 160m | +15 / - | UA6XY | - / -18 | 4 | ✓ Closing fragment |
| 10-07 16:21 | 160m | - / - | SP9ENV | 0 / - | 2 | Partial capture |
| 10-07 16:14 | 160m | +10 / - | R8KAW/P | - / -13 | 12 | ✓ Closing fragment |
| 10-07 14:35 | 160m | -2 / - | R9CS/P | - / +5 | 3 | ✓ Closing fragment |
| 10-07 13:50 | 40m | -7 / - | R9CS/P | - / -8 | 6 | ✓ Closing fragment |
| 10-07 13:36 | 40m | -5 / - | R9CS/P | - / - | 17 | Partial capture |
| 10-06 19:44 | 160m | - / - | IU1VJP | -18 / - | 2 | Partial capture |
| 10-06 19:42 | 160m | +4 / - | GM4JYB | - / -11 | 2 | ✓ Closing fragment |
| 10-06 19:37 | 160m | +15 / - | HA1DAE | +8 / -1 | 4 | ✓ Closing observed |
| 10-06 16:51 | 40m | - / - | F3CJ | -11 / - | 2 | Partial capture |
| 10-06 16:48 | 40m | -4 / - | US7UV | - / -17 | 2 | ✓ Closing fragment |
| 10-06 16:41 | 40m | -4 / - | RA9HL | - / -6 | 6 | Partial capture |
| 10-06 16:39 | 40m | -7 / - | LA1HW | - / -12 | 2 | ✓ Closing fragment |
| 10-06 16:36 | 40m | -8 / - | R9OOH | - / -6 | 2 | ✓ Closing fragment |
| 10-06 16:12 | 160m | +5 / - | R9CS/P | - / +2 | 18 | Partial capture |
| 10-06 15:35 | 160m | - / - | UX5UO | -11 / - | 2 | Partial capture |
| 10-06 15:31 | 160m | +1 / - | R9CS/P | - / - | 13 | Partial capture |
| 10-06 15:01 | 40m | -4 / - | G0BAZ | - / -13 | 2 | ✓ Closing fragment |
| 10-06 14:59 | 40m | -4 / - | PC7W | - / -4 | 2 | ✓ Closing fragment |
| 10-06 14:57 | 40m | -5 / -9 | RD3TOK | -17 / - | 3 | ✓ Closing observed |
| 10-06 14:44 | 40m | -6 / +9 | DG1KFR | -10 / -7 | 4 | ✓ Full exchange observed |
| 10-06 14:37 | 40m | -6 / - | HB9CVT | +3 / 0 | 6 | ✓ Full exchange observed |
| 10-06 14:37 | 40m | -3 / - | R0AU | - / -9 | 2 | ✓ Closing fragment |
| 10-06 14:28 | 40m | -9 / +3 | SP2KW | -3 / +3 | 5 | ✓ Full exchange observed |
| 10-06 14:25 | 40m | 0 / -17 | G0HSP | -18 / -7 | 7 | Partial capture |
| 10-05 17:58 | 160m | - / - | DL9SFE | -20 / - | 2 | Partial capture |
| 10-05 17:58 | 160m | - / -16 | SV3GKU | -12 / - | 2 | Partial capture |
| 10-05 17:49 | 160m | +6 / - | IK2JUA | - / -16 | 5 | ✓ Closing fragment |
| 10-05 17:44 | 160m | +6 / +5 | SQ3RX | +1 / -4 | 5 | ✓ Full exchange observed |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 165815 +6 2252 CQ YL3CW KO36 (x4) 170030 +0 2333 YL3CW UA1CKA KO49 (x2) 170115 +10 2252 UA1CKA YL3CW +02 170130 +2 2333 YL3CW UA1CKA R+00 170145 +3 2252 UA1CKA YL3CW RR73 170200 +2 2333 YL3CW UA1CKA 73 170215 +1 2252 CQ YL3CW KO36 (x5)
UTC dB Audio Message 141845 +3 2253 <...> YL3CW KO36 (x15)
UTC dB Audio Message 134445 -7 1216 R9CS/P YL3CW KO36 (x7) 133945 -4 2288 CQ YL3CW KO36 134015 -1 2288 YC0BYR YL3CW R-16 134115 +0 2288 CQ YL3CW KO36 (x2) 134315 -5 2288 R9OON YL3CW RR73 134345 -3 2288 HB9IJU YL3CW -10 (x2) 134445 -4 2288 CQ YL3CW KO36
UTC dB Audio Message 173430 -15 2163 YL3CW DL4YDR JO32 173445 -5 2164 DL4YDR YL3CW -12 173500 -12 2163 YL3CW DL4YDR R+00 173515 -13 2164 DL4YDR YL3CW RR73 173530 -12 2163 YL3CW DL4YDR 73 174245 -12 2164 CQ YL3CW KO36 (x7) 174600 -3 1359 YL3CW LY2HM KO15 (x3)
UTC dB Audio Message 065830 -16 2437 YL3CW DN9OPA JN38 062245 -18 1757 YL3CW RX6LG -05 (x2) 065100 -16 2285 YL3CW R3DMS -19 (x3) 084630 -13 1458 YL3CW UA3VVA +02 (x2) 084930 -18 1099 YL3CW IK5EEA 73 081545 -12 2540 YL3CW F4IDN RR73 113700 -19 1623 YL3CW UR5EEW KN68 (x3) 074730 -9 579 YL3CW IK4JPP JN54 (x2)
UTC dB Audio Message 061745 -11 2382 CQ YL3CW KO36 (x2) 061830 +9 1862 YL3CW OS4K +10 061845 -10 2382 W0RTA YL3CW -20 061900 +7 1862 YL3CW OS4K +10 (x2) 062000 -17 2381 YL3CW VK3DIY QF22 062030 -8 3032 YL3CW K0IS EN41 062100 +3 1674 YL3CW ON1DGN -07 062115 -10 2382 ON1DGN YL3CW R-04 062130 +0 1674 YL3CW ON1DGN RR73 062345 -11 2382 CQ YL3CW KO36 (x3) 062615 -7 2382 RI1FJL YL3CW 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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