W4CHA — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving W4CHA, decoded by SO8OO in southeastern Poland. 1,452 FT8 messages attributed to this token as transmitter, on 80m, 60m, 40m, 20m, across 39 UTC dates in the available aggregate history. Observed between 2026-06-07 and 2026-10-06.
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 1,452 FT8 messages attributed to W4CHA as the transmitting token by decoded message structure across 39 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (82%), followed by 60 m (16%) and 20 m (3%). Most decodes (99%) fell within the six-hour window 23:00-05:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -8 dB.
Overview
Bands
Last attributed message: 2026-10-06 04:25 UTC
Observed FT8 message patterns
- Attributed sample
- 1,452 messages
- Active dates
- 39 UTC dates
- Estimated median S/N
- -8 dB
- Estimated 10th-90th percentile
- -17 to -2 dB
- Recurring-pattern threshold
- Met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 215, moderate (-15 to -9 dB) 487, strong (≥ -8 dB) 750.
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 W4CHA 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 W4CHA
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
- EL88 · 707 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 8,589 km (approx.)
- Last such locator decoded
- 2026-10-06 04:25 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 | W4CHA S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 10-06 04:48 | 60m | - / -14 | IU4UFT | -4 / - | 2 | ✓ Closing fragment |
| 10-06 04:34 | 60m | - / -15 | EA4DS | -9 / - | 15 | Partial capture |
| 10-05 05:25 | 60m | - / -8 | S56KZ | -13 / - | 3 | ✓ Closing fragment |
| 10-05 04:11 | 60m | - / -7 | 4X4DK | 0 / - | 2 | ✓ Closing fragment |
| 10-04 05:33 | 60m | -18 / -13 | IZ8XQC | -5 / - | 2 | Partial capture |
| 10-04 04:53 | 60m | -15 / - | 9T0MD | - / -11 | 5 | ✓ Closing fragment |
| 10-04 04:44 | 60m | -16 / - | 9T0MD | - / - | 7 | Partial capture |
| 10-04 03:36 | 60m | -10 / - | 9T0MD | - / - | 2 | Partial capture |
| 10-04 03:20 | 60m | -12 / - | 9T0MD | - / - | 4 | Partial capture |
| 10-04 02:46 | 60m | -17 / - | 9T0MD | - / - | 6 | Partial capture |
| 10-04 02:30 | 60m | -13 / - | 9T0MD | - / - | 2 | Partial capture |
| 10-04 02:14 | 60m | -18 / - | 9T0MD | - / - | 4 | Partial capture |
| 10-04 02:03 | 60m | -18 / - | 9T0MD | - / - | 2 | Partial capture |
| 10-04 01:30 | 60m | -16 / - | 9T0MD | - / - | 3 | Partial capture |
| 10-04 01:17 | 60m | -12 / - | 9T0MD | - / - | 5 | Partial capture |
| 10-04 01:08 | 60m | -15 / - | 9T0MD | - / - | 7 | Partial capture |
| 10-04 00:53 | 60m | -14 / - | 9T0MD | - / - | 4 | Partial capture |
| 10-04 00:45 | 60m | - / - | EB2FBI | -14 / - | 2 | Partial capture |
| 10-04 00:38 | 60m | -20 / - | 9T0MD | - / -8 | 2 | Partial capture |
| 10-04 00:23 | 60m | -15 / - | 9T0MD | - / - | 5 | Partial capture |
| 10-04 00:03 | 60m | -13 / - | 9T0MD | - / - | 18 | Partial capture |
| 10-04 00:00 | 60m | -18 / - | 9T0MD | - / - | 2 | Partial capture |
| 10-03 23:48 | 60m | -10 / - | 9T0MD | - / - | 7 | Partial capture |
| 10-03 23:35 | 60m | -19 / - | 9T0MD | - / - | 3 | Partial capture |
| 10-03 23:33 | 60m | - / -15 | UX0FF | 0 / - | 3 | ✓ Closing fragment |
| 10-03 05:36 | 60m | - / -10 | I0TPU | -9 / - | 4 | ✓ Closing fragment |
| 10-03 04:57 | 60m | - / -16 | IK4ADE | +2 / - | 4 | ✓ Closing fragment |
| 10-03 04:46 | 60m | - / -18 | IU5HWS | -8 / - | 2 | ✓ Closing fragment |
| 10-03 04:34 | 60m | - / -12 | ER2OZ | +2 / - | 2 | ✓ Closing fragment |
| 10-03 04:22 | 60m | - / -18 | LZ1NI | -21 / - | 2 | ✓ Closing fragment |
| 10-03 04:21 | 60m | - / -16 | YO4BEW | -18 / - | 2 | ✓ Closing fragment |
| 10-03 04:15 | 60m | - / -16 | YO3CUS | +5 / - | 2 | ✓ Closing fragment |
| 10-03 04:13 | 60m | - / +2 | F4LVE | -11 / - | 2 | ✓ Closing fragment |
| 09-30 03:32 | 60m | -20 / - | SV9AUP | -14 / -8 | 4 | ✓ Closing observed |
| 09-30 02:57 | 60m | - / -11 | YO2MAX | -14 / - | 2 | ✓ Closing fragment |
| 09-29 05:29 | 60m | - / -6 | OH3NAQ | -14 / - | 3 | ✓ Closing fragment |
| 09-29 05:28 | 60m | - / 0 | M0PNN | -13 / - | 2 | ✓ Closing fragment |
| 09-29 05:23 | 60m | - / - | HA5LB | -15 / - | 3 | Partial capture |
| 09-29 05:03 | 60m | -12 / -15 | SP9BGL | +4 / - | 6 | ✓ Closing observed |
| 09-29 04:13 | 60m | -14 / - | KJ7WKX | - / -16 | 2 | ✓ Closing fragment |
| 09-29 04:12 | 60m | -14 / - | KF7UGV | - / +6 | 2 | Partial capture |
| 09-29 04:09 | 60m | -16 / - | AF7S | - / -16 | 3 | Partial capture |
| 09-29 03:57 | 60m | -18 / - | VA2GLC | - / -10 | 3 | ✓ Closing fragment |
| 09-28 06:14 | 60m | - / -15 | F1LPT/P | -21 / - | 2 | ✓ Closing fragment |
| 09-28 04:58 | 60m | - / -15 | SV2BWY | -3 / - | 4 | ✓ Closing fragment |
| 09-27 01:55 | 60m | - / -10 | S57TW | -7 / - | 2 | ✓ Closing fragment |
| 09-27 01:52 | 60m | - / -10 | LA9GX | +8 / - | 2 | ✓ Closing fragment |
| 09-26 02:55 | 60m | - / -15 | LZ936BA | -22 / - | 2 | Partial capture |
| 09-26 02:36 | 60m | - / -11 | LZ936BA | -8 / - | 2 | Partial capture |
| 09-25 01:02 | 40m | -12 / - | UR8EP | - / - | 2 | Partial capture |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 043700 -9 1078 W4CHA EA4DS IN80 (x10) 044845 -3 1135 W4CHA IU4UFT -14 (x2) 045630 -7 2710 W4CHA EA4EER RR73 054345 -24 2006 W4CHA DG4BH -16 (x2)
UTC dB Audio Message 005215 -10 270 LW3EXJ W4CHA R-22 (x2) 005400 +10 552 W4CHA IU5RPJ -11 005415 -11 270 IU5RPJ W4CHA R-24 005430 +11 552 W4CHA IU5RPJ RR73 005445 -10 270 IU5RPJ W4CHA 73 005545 -9 270 PF7DKW W4CHA R-19 (x2) 005645 -10 270 PY2MER W4CHA EL88 (x3) 005900 -11 270 YO2LEA W4CHA EL88 (x2) 010215 -11 258 UR8EP W4CHA EL88 (x2)
UTC dB Audio Message 235015 -6 1279 W4CHA SM2LIY KP04 (x5) 003030 +6 2341 W4CHA OH2CLX KP10 (x3) 002300 -9 1653 W4CHA LA9JKA -19 (x5) 013445 -17 1729 W4CHA PY6HD -23 (x2)
UTC dB Audio Message 223430 -16 2091 W4CHA IZ1MKK -13 141800 -13 2321 W4CHA R6FMK -13 (x2) 134445 -9 2050 W4CHA G4CUS -14 (x2)
UTC dB Audio Message 035400 -12 1379 W4CHA R3UAX LO17 035430 -12 830 W4CHA UB4CJS -18 035430 -5 1379 W4CHA R3UAX R-03 035530 -6 829 W4CHA UB4CJS -18 035700 -10 1020 W4CHA R4ML -11 035730 -14 829 W4CHA UB4CJS -18 035730 -12 1020 W4CHA R4ML -11 035800 -6 830 W4CHA UB4CJS -18 035800 -13 1020 W4CHA R4ML RR73 040145 -10 3079 OK1XOX W4CHA RR73 041045 -12 3080 KF0WWR W4CHA RR73 041800 -9 3079 CQ W4CHA EL88 041815 +6 2883 W4CHA RA6BL KN95 (x3)
UTC dB Audio Message 020930 -19 2109 HI3RMJ W4CHA EL88 (x2) 021145 -19 2006 W4CHA K4BQP/4 R+03
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