RK4FF — 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 RK4FF, decoded by SO8OO in southeastern Poland. 4,196 FT8 messages attributed to this token as transmitter, on 160m, 80m, 40m, 20m, 10m, across 79 UTC dates in the available aggregate history. Observed between 2026-06-07 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 4,196 FT8 messages attributed to RK4FF as the transmitting token by decoded message structure across 79 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (54%), followed by 40 m (35%) and 80 m (8%). Most decodes (51%) fell within the six-hour window 01:00-07:00 UTC. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (65%); the estimated median was -5 dB.
Overview
Bands
Last attributed message: 2026-10-22 16:35 UTC
Observed FT8 message patterns
- Attributed sample
- 4,196 messages
- Active dates
- 79 UTC dates
- Estimated median S/N
- -5 dB
- Estimated 10th-90th percentile
- -15.6 to +7 dB
- Recurring-pattern threshold
- Met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 421, moderate (-15 to -9 dB) 1,047, strong (≥ -8 dB) 2,728.
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 RK4FF 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 RK4FF
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
- LO23 · 211 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 1,639 km (approx.)
- Last such locator decoded
- 2026-10-21 03:48 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 | RK4FF S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 10-22 16:32 | 40m | -9 / - | BD3PPH | - / -5 | 2 | ✓ Closing fragment |
| 10-22 16:31 | 40m | -4 / - | BG3GP | - / 0 | 2 | ✓ Closing fragment |
| 10-22 16:27 | 40m | -2 / - | DH1BAS | - / -2 | 3 | Partial capture |
| 10-22 16:24 | 40m | -1 / -2 | DL3JAC | +1 / -7 | 10 | ✓ Full exchange observed |
| 10-21 18:16 | 80m | 0 / - | DL1JEL | - / - | 4 | Partial capture |
| 10-21 18:14 | 80m | -5 / -8 | DD0IPA | -3 / +7 | 7 | ✓ Full exchange observed |
| 10-21 18:13 | 80m | +2 / - | MM0HVU | - / +6 | 2 | ✓ Closing fragment |
| 10-21 18:12 | 80m | -2 / - | ON7KRI | -8 / - | 3 | ✓ Closing observed |
| 10-21 18:10 | 80m | -5 / - | R3DRA | - / +2 | 3 | Partial capture |
| 10-21 18:08 | 80m | -5 / -9 | SP2ADI | +10 / +9 | 4 | ✓ Full exchange observed |
| 10-21 18:07 | 80m | +4 / - | DO5SMH | - / +4 | 2 | Partial capture |
| 10-21 18:04 | 80m | - / -9 | MW7GQB | +4 / - | 2 | ✓ Closing fragment |
| 10-21 18:03 | 80m | -6 / +9 | EU7DW | -4 / - | 3 | ✓ Closing observed |
| 10-21 18:01 | 80m | - / -5 | SP3LPT | -8 / - | 2 | ✓ Closing fragment |
| 10-21 17:59 | 80m | +11 / +4 | R3HH | -2 / -9 | 5 | ✓ Full exchange observed |
| 10-21 17:59 | 80m | -2 / -12 | SQ2JYJ | -8 / - | 3 | ✓ Closing observed |
| 10-21 17:57 | 80m | 0 / - | M7FSE | - / -18 | 2 | ✓ Closing fragment |
| 10-21 17:56 | 80m | +6 / -4 | DO9NMH | -8 / -3 | 4 | ✓ Full exchange observed |
| 10-21 17:52 | 80m | +5 / -5 | RZ6ALZ | -4 / -4 | 3 | Partial capture |
| 10-21 17:51 | 80m | -3 / -8 | ON4NYO | -12 / +7 | 5 | Partial capture |
| 10-21 17:50 | 80m | +2 / -6 | SO5WI | +6 / 0 | 4 | ✓ Full exchange observed |
| 10-21 17:48 | 80m | -1 / -1 | DK1HSI | -9 / -1 | 4 | ✓ Full exchange observed |
| 10-21 17:46 | 80m | -2 / -12 | DO8JB | -2 / -3 | 4 | ✓ Full exchange observed |
| 10-21 17:43 | 80m | 0 / - | M7NQB | - / +2 | 4 | Partial capture |
| 10-21 17:41 | 80m | +1 / -8 | DL0UEP | -20 / -11 | 3 | ✓ Full exchange observed |
| 10-21 17:39 | 80m | -2 / -8 | UA4POO | -6 / -14 | 4 | ✓ Full exchange observed |
| 10-21 17:37 | 80m | +1 / +5 | OE3DXA | +10 / -19 | 4 | ✓ Full exchange observed |
| 10-21 17:36 | 80m | -2 / 0 | SP9HPI | +8 / -12 | 4 | ✓ Full exchange observed |
| 10-21 17:33 | 80m | -2 / -9 | EW4DX | -12 / -18 | 4 | ✓ Full exchange observed |
| 10-21 17:30 | 80m | -2 / - | R8PG | -8 / -2 | 2 | ✓ Closing observed |
| 10-21 17:27 | 80m | +2 / - | R6ZE | - / -3 | 2 | ✓ Closing fragment |
| 10-21 17:25 | 80m | +8 / - | EV1R | +12 / -2 | 5 | ✓ Full exchange observed |
| 10-21 12:34 | 10m | - / -5 | F4HBV | -14 / - | 2 | ✓ Closing fragment |
| 10-21 12:23 | 10m | - / +4 | CS7BMX | -18 / - | 3 | ✓ Closing fragment |
| 10-21 03:58 | 40m | -8 / - | DG0NE | - / -10 | 2 | Partial capture |
| 10-21 03:56 | 40m | -11 / - | F4FHW | - / -6 | 2 | Partial capture |
| 10-21 03:53 | 40m | -11 / - | IT9CUE | - / -20 | 3 | ✓ Closing fragment |
| 10-21 03:52 | 40m | -8 / - | IK3GBG | - / +3 | 2 | ✓ Closing fragment |
| 10-21 03:49 | 40m | -6 / - | OZ1AKN | - / -15 | 4 | Partial capture |
| 10-21 03:48 | 40m | +8 / -3 | CT7BRV | -12 / -2 | 5 | ✓ Full exchange observed |
| 10-20 04:05 | 40m | -1 / +2 | FM/VE3DZ | +4 / +1 | 7 | Partial capture |
| 10-20 03:57 | 40m | 0 / - | FM/VE3DZ | - / - | 2 | Partial capture |
| 10-20 03:55 | 40m | +4 / - | <...> | - / +1 | 3 | Partial capture |
| 10-20 03:53 | 40m | -5 / +6 | R9LY/P | -17 / +10 | 3 | ✓ Full exchange observed |
| 10-20 03:32 | 40m | - / +9 | KE4EB | +7 / - | 4 | Partial capture |
| 10-20 03:28 | 40m | +8 / - | N0MGB | - / -16 | 2 | Partial capture |
| 10-20 03:27 | 40m | +18 / - | KE4EB | - / +1 | 2 | Partial capture |
| 10-20 03:26 | 40m | +16 / - | W9SX | - / -7 | 3 | ✓ Closing fragment |
| 10-20 03:24 | 40m | +14 / -9 | F4HQB | -9 / -2 | 5 | Partial capture |
| 10-20 03:22 | 40m | +10 / -3 | M9DNC | -13 / -9 | 4 | ✓ Full exchange observed |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 162545 +1 2400 RK4FF DL3JAC R-02 162600 -2 2400 DL3JAC RK4FF RR73 162615 +0 2400 RK4FF DL3JAC R-02 162630 +1 2400 DL3JAC RK4FF RR73 162645 -4 2400 RK4FF DL3JAC R-02 (x2) 162730 +0 681 DH1BAS RK4FF -02 (x3) 163130 -2 735 BG3GP RK4FF +00 163200 -9 1539 BD3PPH RK4FF -05 (x2) 163300 -5 1540 BG3GP RK4FF RR73 163400 -7 1633 RL6ZK RK4FF -18 163515 -8 1485 SP7TJ RK4FF +03
UTC dB Audio Message 181230 -1 1501 ON7KRI RK4FF RR73 181245 -8 1505 RK4FF ON7KRI 73 181300 +0 1501 MM0HVU RK4FF R+06 (x2) 181400 -5 1882 DD0IPA RK4FF +07 (x2) 181445 -4 1887 RK4FF DD0IPA R-08 181500 -9 1882 DD0IPA RK4FF RR73 181515 -3 1887 RK4FF DD0IPA R-08 181530 -2 1882 DD0IPA RK4FF RR73 181545 -3 1887 RK4FF DD0IPA 73 181600 +2 1143 DL1JEL RK4FF +11 (x4)
UTC dB Audio Message 113200 +3 2892 RK4FF DN9BLN 73 113600 -17 846 SQ5NAN RK4FF RR73 113630 -20 1304 <...> RK4FF -01 113715 -11 2575 OH1ZE RK4FF -04 114015 -22 1508 YU4EA RK4FF -10 132130 -22 1612 RK4FF IU8QTW R-06 (x3) 064030 +0 506 RK4FF R8DV MO08 121415 -9 857 RK4FF CR7CDR 73 122330 -15 1647 RK4FF CS7BMX R+04 (x3) 123415 -13 1003 RK4FF F4HBV R-05 (x2)
UTC dB Audio Message 162215 -18 326 H49A RK4FF LO23 (x4) 170400 -24 1873 RK4FF RA6ANN KN95 183645 -16 1500 UA9KBC RK4FF LO23 (x2) 183745 -15 2164 IS0JHQ RK4FF LO23 (x3) 183900 +1 2163 RK4FF IS0JHQ R-18 183915 -17 2002 UA9KBC RK4FF R+01 183930 +4 2163 RK4FF IS0JHQ R-18 183945 -19 1502 UA9KBC RK4FF 73 184145 -23 1934 RA6ATZ RK4FF RR73
UTC dB Audio Message 174815 +14 950 M9ORB RK4FF -18 (x3) 175145 +2 2103 DL7KI RK4FF -03 (x3) 180830 -6 682 EA4GA/P RK4FF -11 (x2) 180930 -8 1841 PD0PDI RK4FF -14 (x3) 041915 +6 2076 <...> RK4FF -19 (x4)
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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