TF4M — reception at SO8OO
Signals decoded by SO8OO in southeastern Poland. FT8 and CW have separate histories; all times are UTC.
FT8 activity
Receiver-side FT8 activity involving TF4M, decoded by SO8OO in southeastern Poland. 7,953 FT8 messages attributed to this token as transmitter, on 160m, 80m, 40m, 20m, 10m, across 75 UTC dates in the available aggregate history. Observed between 2026-06-08 and 2026-10-20.
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 7,953 FT8 messages attributed to TF4M as the transmitting token by decoded message structure across 75 UTC dates in the available aggregate history. The largest monitored-band total was 80 m (67%), followed by 40 m (16%) and 20 m (15%). Most decodes (62%) fell within the six-hour window 19:00-01:00 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: 2026-10-20 14:38 UTC
Observed FT8 message patterns
- Attributed sample
- 7,953 messages
- Active dates
- 75 UTC dates
- Estimated median S/N
- -9 dB
- Estimated 10th-90th percentile
- -18 to +1 dB
- Recurring-pattern threshold
- Met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 1,525, moderate (-15 to -9 dB) 2,737, strong (≥ -8 dB) 3,691.
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 TF4M 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 TF4M
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
- HP85 · 3,909 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 3,074 km (approx.)
- Last such locator decoded
- 2026-10-20 14:37 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 | TF4M S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 10-21 20:32 | 80m | - / -25 | HB9AMO | +10 / - | 3 | ✓ Closing fragment |
| 10-20 22:46 | 160m | - / - | F4BPO | +4 / - | 3 | Partial capture |
| 10-20 22:42 | 160m | - / - | F4BPO | 0 / - | 2 | Partial capture |
| 10-20 22:38 | 160m | - / - | EA5RU | -10 / - | 2 | Partial capture |
| 10-20 14:37 | 10m | -12 / - | <...> | - / -15 | 2 | Partial capture |
| 10-20 14:14 | 10m | -13 / - | 7Z1IS | - / -12 | 2 | Partial capture |
| 10-20 13:27 | 10m | -12 / - | 3B8GL | - / - | 2 | Partial capture |
| 10-20 13:05 | 10m | -11 / - | 3B8GL | - / - | 7 | Partial capture |
| 10-20 13:01 | 10m | -8 / - | RZ2A | - / -23 | 2 | ✓ Closing fragment |
| 10-20 13:00 | 10m | -10 / - | OK1ND | - / -13 | 4 | ✓ Closing fragment |
| 10-20 12:55 | 10m | -9 / - | TF5B | - / -21 | 4 | Partial capture |
| 10-20 12:45 | 10m | -4 / - | RW3TJ | - / -11 | 2 | ✓ Closing fragment |
| 10-20 12:44 | 10m | -6 / - | RA1OW | - / -2 | 2 | ✓ Closing fragment |
| 10-20 12:43 | 10m | -4 / - | RC6OG | - / 0 | 2 | ✓ Closing fragment |
| 10-20 12:31 | 10m | -12 / - | OK1CL | - / - | 2 | ✓ Closing fragment |
| 10-20 12:28 | 10m | -11 / - | 7Z1FF | - / - | 6 | Partial capture |
| 10-20 12:09 | 10m | -14 / - | 7Z1BH | -6 / - | 2 | ✓ Closing observed |
| 10-20 01:33 | 40m | - / -19 | HK3Z | -17 / - | 5 | ✓ Closing fragment |
| 10-20 01:28 | 40m | - / -11 | K6RO | +5 / - | 3 | ✓ Closing fragment |
| 10-20 01:19 | 40m | -20 / - | AC9C | -13 / +1 | 2 | Partial capture |
| 10-20 01:11 | 40m | - / -14 | NN2D | -16 / - | 2 | ✓ Closing fragment |
| 10-20 01:06 | 40m | - / -2 | KW4BY | -6 / - | 4 | ✓ Closing fragment |
| 10-19 22:45 | 40m | -16 / - | BI4KYT | - / -7 | 2 | ✓ Closing fragment |
| 10-19 22:44 | 40m | -14 / - | JA6BDB | - / -15 | 2 | ✓ Closing fragment |
| 10-19 22:42 | 40m | -16 / - | 7Z1BQ | - / - | 3 | Partial capture |
| 10-19 22:30 | 40m | -16 / - | 7Z1BQ | - / - | 4 | Partial capture |
| 10-19 22:26 | 40m | -14 / - | JA3HBF | - / -2 | 2 | ✓ Closing fragment |
| 10-19 22:25 | 40m | -15 / - | 7Z1BQ | - / - | 2 | Partial capture |
| 10-19 22:22 | 40m | -17 / - | BV2NF | - / -6 | 2 | ✓ Closing fragment |
| 10-19 22:20 | 40m | -14 / - | JG8FWH | - / -16 | 2 | ✓ Closing fragment |
| 10-19 22:19 | 40m | -17 / - | TJ1GD | - / -9 | 3 | ✓ Closing fragment |
| 10-19 22:18 | 40m | -18 / - | PD4PDH | - / -6 | 2 | ✓ Closing fragment |
| 10-19 22:17 | 40m | -18 / - | JA4IZL | - / -20 | 2 | ✓ Closing fragment |
| 10-19 22:16 | 40m | -16 / - | JH0INP | - / 0 | 2 | ✓ Closing fragment |
| 10-19 22:13 | 40m | -15 / - | WB5MTV | - / -19 | 2 | ✓ Closing fragment |
| 10-19 22:12 | 40m | -19 / - | JH3CUL | - / 0 | 2 | ✓ Closing fragment |
| 10-19 22:11 | 40m | -16 / -9 | 9K2ES | -15 / -5 | 10 | ✓ Full exchange observed |
| 10-19 22:10 | 40m | -16 / - | K0DG | - / -7 | 2 | Partial capture |
| 10-19 22:09 | 40m | -16 / - | JA1DCK | - / -11 | 2 | ✓ Closing fragment |
| 10-19 22:08 | 40m | - / - | F4MXU | -10 / - | 3 | Partial capture |
| 10-19 22:05 | 40m | -16 / -15 | YO3GNF | -18 / -10 | 3 | Partial capture |
| 10-19 22:03 | 40m | -17 / -6 | F5CUN | +3 / -2 | 5 | ✓ Full exchange observed |
| 10-19 22:02 | 40m | -17 / -9 | IK4TVP | -8 / -7 | 8 | ✓ Full exchange observed |
| 10-19 22:01 | 40m | -18 / - | W9TEF | - / -11 | 2 | ✓ Closing fragment |
| 10-19 22:00 | 40m | -20 / - | JA8DNV | - / +6 | 2 | ✓ Closing fragment |
| 10-19 21:58 | 40m | -16 / - | G4NSO | -18 / -12 | 4 | Partial capture |
| 10-19 21:56 | 40m | -16 / - | EA8AR | - / -2 | 3 | ✓ Closing fragment |
| 10-19 21:53 | 40m | -16 / - | JH4MGU | - / +4 | 2 | ✓ Closing fragment |
| 10-19 21:52 | 40m | -14 / - | BV2NF | - / - | 2 | Partial capture |
| 10-19 21:50 | 40m | -14 / - | SP7FSA | - / -1 | 2 | ✓ Closing fragment |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 221500 -11 1710 RY6O TF4M RR73 221515 +0 1992 TF4M DK3WN JN49 221530 -9 1709 DK3WN TF4M +09 221545 -1 1992 TF4M DK3WN R-02 221600 -7 1709 DK3WN TF4M RR73 221615 +0 1992 TF4M DK3WN 73 221630 -8 1709 CQ TF4M HP85 (x3) 222115 -8 1406 TF4M OZ9AU JO65 (x3) 203245 +10 2377 TF4M HB9AMO JN36 (x3)
UTC dB Audio Message 212700 -8 1869 TF4M SP7ENW JO91 (x5) 185330 +0 1734 TF4M DC6UW JO44 223830 -9 1833 TF4M EA5RU IM99 224000 +8 1116 TF4M F4BPO JN36 224000 -12 1833 TF4M EA5RU IM99 224230 +1 1116 TF4M F4BPO JN36 (x6)
UTC dB Audio Message 130600 -9 2559 3B8GL TF4M HP85 (x8) 140330 -13 2559 7Z1IS TF4M HP85 140730 -13 2559 RA3LD TF4M RR73 140800 -11 2559 LY3CY TF4M RR73 141430 -14 2560 7Z1IS TF4M HP85 (x2) 143745 -13 2559 <...> TF4M HP85 (x2)
UTC dB Audio Message 011115 -18 2351 TF4M NN2D R-14 (x2) 011800 -17 2283 N1CPL TF4M -16 011915 -13 365 TF4M AC9C EM74 011930 -20 2284 AC9C TF4M +01 012200 -18 2284 W9DCT TF4M -23 012445 -13 2519 TF4M W0PV R-15 012815 +5 719 TF4M K6RO FN43 (x3) 013345 -16 1523 TF4M HK3Z -19 (x5)
UTC dB Audio Message 231645 -6 1063 TF4M EA1IOK IN62 (x3) 193000 -16 2218 TF4M CT7BIZ IN60 (x2)
UTC dB Audio Message 152645 -23 2091 TF4M IZ3ZQT JN55 (x2) 152815 -13 2480 TF4M F4NMY JN08 (x2) 154415 -9 2456 TF4M F4MSA -07 155600 -14 1209 TF4M EB1DJ IN52 (x2) 160445 -14 2386 TF4M LZ2TWY KN33 (x5) 160815 -17 2479 7Z1FF TF4M HP85 (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.
CW
No CW receptions recorded for this callsign in the last 30 days.
Explore CW reception at SO8OOFT8DB and SO8OO WebSDR are a hobby project maintained solo. ☕ Buy me a coffee