TK4RB — 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 TK4RB, decoded by SO8OO in southeastern Poland. 101 FT8 messages attributed to this token as transmitter, on 160m, 20m, 10m, across 6 UTC dates in the available aggregate history. Observed between 2026-06-22 and 2026-10-22.
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 101 FT8 messages attributed to TK4RB as the transmitting token by decoded message structure across 6 UTC dates in the available aggregate history. The largest monitored-band total was 160 m (77%), followed by 10 m (16%) and 20 m (7%). Several six-hour UTC windows tied for the largest share (98%), so no unique busiest interval is claimed. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -10 dB.
Overview
Bands
Last attributed message: 2026-10-22 18:29 UTC
Observed FT8 message patterns
- Attributed sample
- 101 messages
- Active dates
- 6 UTC dates
- Estimated median S/N
- -10 dB
- Estimated 10th-90th percentile
- -20 to -3 dB
- Recurring-pattern threshold
- Met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 22, moderate (-15 to -9 dB) 37, strong (≥ -8 dB) 42.
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 TK4RB 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 TK4RB
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
- JN42 · 70 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 1,282 km (approx.)
- Last such locator decoded
- 2026-10-22 18:29 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 | TK4RB S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 10-22 18:31 | 160m | - / - | EA7OC | -14 / - | 2 | Partial capture |
| 10-22 18:28 | 160m | - / - | DK2CC | +4 / - | 18 | Partial capture |
| 10-22 18:27 | 160m | - / - | DC5PPM | -2 / - | 5 | Partial capture |
| 10-22 18:27 | 160m | - / -19 | R2FC | +2 / - | 10 | Partial capture |
| 10-22 18:26 | 160m | - / - | UA4FKT | -8 / - | 5 | Partial capture |
| 10-22 18:22 | 160m | -6 / - | EX7DY | - / - | 9 | Partial capture |
| 10-22 18:15 | 160m | -10 / - | EX7DY | - / - | 2 | Partial capture |
| 10-22 18:10 | 160m | - / - | UA6MF | +1 / - | 7 | Partial capture |
| 10-22 18:08 | 160m | - / - | IU5HIU | -13 / - | 2 | Partial capture |
| 10-22 18:02 | 160m | -11 / - | EX7DY | - / - | 18 | Partial capture |
| 10-22 17:58 | 160m | - / - | SV1BLD | -2 / - | 2 | Partial capture |
| 10-22 17:55 | 160m | - / - | IZ3ATV | -2 / - | 3 | Partial capture |
| 10-22 17:55 | 160m | - / - | OZ2LIN | -2 / - | 5 | Partial capture |
| 10-22 17:53 | 160m | -15 / - | EX7DY | - / - | 11 | Partial capture |
| 10-22 17:48 | 160m | -21 / - | EX7DY | - / - | 3 | Partial capture |
| 10-22 17:46 | 160m | -12 / -10 | F5NBU | +15 / - | 6 | ✓ Full exchange observed |
| 10-22 17:43 | 160m | -7 / - | EX7DY | - / - | 6 | Partial capture |
| 10-22 17:39 | 160m | - / - | SP3PLD | +4 / - | 2 | Partial capture |
| 10-22 17:31 | 160m | - / - | SP3PLD | +6 / - | 6 | Partial capture |
| 10-22 17:30 | 160m | - / - | IK0PHY | -10 / - | 3 | Partial capture |
| 10-22 17:29 | 160m | -22 / - | BD8CS | - / -6 | 2 | Partial capture |
| 10-15 18:31 | 160m | - / - | E73S | -2 / - | 5 | Partial capture |
| 10-15 18:29 | 160m | - / - | DL3GA | -12 / - | 3 | Partial capture |
| 10-15 18:28 | 160m | - / - | RA6ABO | -20 / - | 7 | Partial capture |
| 10-15 18:28 | 160m | - / - | OE5RLP | +1 / - | 8 | Partial capture |
| 10-15 18:26 | 160m | -6 / - | 4L7T | - / -22 | 8 | ✓ Closing fragment |
| 10-11 17:33 | 160m | - / - | 9A5TW | +14 / - | 4 | Partial capture |
| 10-11 17:31 | 160m | - / - | SQ8GBG | -2 / - | 10 | Partial capture |
| 10-11 17:29 | 160m | -14 / - | DF6DBF | -18 / -16 | 22 | Partial capture |
| 10-11 17:26 | 160m | -10 / -3 | SV2JU | -14 / -15 | 11 | ✓ Full exchange observed |
| 10-11 17:26 | 160m | -16 / - | RV9CX | - / - | 4 | Partial capture |
| 08-26 17:18 | 20m | - / - | LA3SHA | +1 / - | 7 | Partial capture |
| 08-26 16:48 | 20m | - / -11 | IU8PML | +5 / - | 5 | Partial capture |
| 08-26 16:44 | 20m | +17 / - | RI1FJL | - / -7 | 7 | ✓ Closing fragment |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 183100 +3 555 TK4RB DK2CC JO63 183130 +8 2646 TK4RB R2FC KO14 183130 +7 555 TK4RB DK2CC JO63 183200 +10 2646 TK4RB R2FC R-19 183200 -14 2548 TK4RB EA7OC IM77 183200 +6 555 TK4RB DK2CC JO63 (x10)
UTC dB Audio Message 074130 -16 2409 CQ DX TK4RB JN42 074330 -13 2409 VK4XA TK4RB RR73 170230 -23 2190 WP4XN TK4RB JN42 170330 -21 2191 CT2ECS TK4RB +09 090600 -11 1413 TK4RB YB1UUN OI33
UTC dB Audio Message 164715 +16 2340 RI1FJL TK4RB R-07 (x2) 164830 +10 2678 TK4RB R2AFI KO94 164830 +5 674 TK4RB IU8PML -11 (x5) 171830 +1 764 TK4RB LA3SHA JP40 (x7)
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.
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