RU4F — 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 RU4F, decoded by SO8OO in southeastern Poland. 968 FT8 messages attributed to this token as transmitter, on 160m, 80m, 40m, 20m, across 45 UTC dates in the available aggregate history. Observed between 2026-06-17 and 2026-11-05.
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 968 FT8 messages attributed to RU4F as the transmitting token by decoded message structure across 45 UTC dates in the available aggregate history. The largest monitored-band total was 80 m (61%), followed by 40 m (27%) and 20 m (11%). Most decodes (79%) 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 (71%); the estimated median was -4 dB.
Overview
Bands
Last attributed message: 2026-11-05 04:58 UTC
Observed FT8 message patterns
- Attributed sample
- 968 messages
- Active dates
- 45 UTC dates
- Estimated median S/N
- -4 dB
- Estimated 10th-90th percentile
- -14 to +5 dB
- Recurring-pattern threshold
- Met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 47, moderate (-15 to -9 dB) 233, strong (≥ -8 dB) 688.
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 RU4F 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 RU4F
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 · 336 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 1,639 km (approx.)
- Last such locator decoded
- 2026-11-05 04:54 UTC
Other locator fields attributed to this token: LO33 (3).
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 | RU4F S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 11-05 04:57 | 40m | -1 / - | HA7TM | - / -7 | 2 | ✓ Closing fragment |
| 11-05 04:56 | 40m | -2 / - | UB3ZKO | - / -9 | 2 | ✓ Closing fragment |
| 11-05 04:54 | 40m | -1 / -2 | EU4U | 0 / -11 | 5 | ✓ Full exchange observed |
| 11-05 04:51 | 40m | 0 / - | TC2TR | - / -11 | 2 | ✓ Closing fragment |
| 11-05 04:47 | 40m | -2 / - | CU2DX | - / - | 2 | Partial capture |
| 11-05 04:44 | 40m | -2 / -9 | CT7AUT | -17 / -12 | 5 | ✓ Full exchange observed |
| 11-05 04:43 | 40m | +2 / - | XE2V | - / - | 2 | Partial capture |
| 11-05 04:37 | 40m | -1 / +2 | IU8RFW | +5 / -14 | 7 | ✓ Full exchange observed |
| 11-05 04:36 | 40m | +3 / - | D44PX | - / - | 2 | ✓ Closing fragment |
| 11-05 04:29 | 40m | 0 / - | D44PX | - / -8 | 3 | Partial capture |
| 11-05 04:18 | 40m | -13 / - | 3A2LF | - / - | 2 | ✓ Closing fragment |
| 11-02 04:22 | 80m | -7 / - | C5R | - / - | 2 | Partial capture |
| 11-01 14:49 | 80m | +6 / - | KH8A | - / - | 2 | Partial capture |
| 10-28 17:54 | 40m | -10 / -6 | RA6OD | -2 / -12 | 5 | ✓ Full exchange observed |
| 10-28 17:49 | 40m | - / -12 | RD3FY | -1 / - | 6 | ✓ Closing fragment |
| 10-28 17:43 | 40m | -12 / -5 | SV1ENG | -9 / -10 | 5 | ✓ Full exchange observed |
| 10-28 17:42 | 40m | -12 / - | ZL1VAH | - / -18 | 2 | ✓ Closing fragment |
| 10-28 17:39 | 40m | - / -7 | UB3ZKO | -4 / - | 2 | Partial capture |
| 10-28 17:39 | 40m | -11 / - | EP2AES | - / -8 | 3 | ✓ Closing fragment |
| 10-28 17:33 | 40m | -3 / - | 7P8GE | - / -3 | 3 | ✓ Closing fragment |
| 10-28 04:53 | 80m | -11 / - | R9CS/P | - / -4 | 5 | Partial capture |
| 10-28 04:47 | 40m | 0 / - | F4MXT/P | - / -5 | 2 | Partial capture |
| 10-28 04:43 | 40m | 0 / - | TJ1GD | - / -18 | 3 | ✓ Closing fragment |
| 10-27 17:56 | 80m | - / -7 | RT3K | -8 / - | 2 | ✓ Closing fragment |
| 10-26 13:58 | 40m | -12 / - | 3W9A | - / -5 | 3 | ✓ Closing fragment |
| 10-24 20:18 | 80m | -3 / - | JA1KNB | - / -10 | 2 | ✓ Closing fragment |
| 10-24 20:11 | 80m | 0 / - | 7M2NZN | - / -12 | 3 | ✓ Closing fragment |
| 10-24 20:10 | 80m | 0 / - | JH7VTE | - / -11 | 2 | Partial capture |
| 10-24 20:05 | 80m | -5 / - | JM1EMX | - / -12 | 2 | ✓ Closing fragment |
| 10-24 20:04 | 80m | +1 / - | JA2KRE | - / -8 | 2 | Partial capture |
| 10-24 19:46 | 80m | -6 / - | JE2ADB | - / -14 | 3 | ✓ Closing fragment |
| 10-24 19:32 | 40m | - / - | RD3FY | -10 / - | 2 | Partial capture |
| 10-24 19:29 | 40m | -3 / - | R2FDU | - / -19 | 3 | ✓ Closing fragment |
| 10-24 19:28 | 40m | -1 / - | BD8FWI | - / -17 | 2 | ✓ Closing fragment |
| 10-24 19:27 | 40m | -4 / - | UC6W | - / -5 | 2 | ✓ Closing fragment |
| 10-24 19:24 | 40m | -4 / - | RD0L/P | - / -11 | 3 | ✓ Closing fragment |
| 10-24 19:21 | 40m | -8 / -6 | ON6WDL | +10 / - | 3 | ✓ Closing observed |
| 10-24 19:19 | 40m | - / - | RA7Z | -16 / - | 2 | Partial capture |
| 10-24 19:17 | 40m | -3 / +1 | ON7GB | +8 / - | 5 | ✓ Closing observed |
| 10-24 19:14 | 40m | +3 / - | GW5NIC | - / -5 | 3 | ✓ Closing fragment |
| 10-24 19:11 | 40m | +1 / - | TJ1GD | - / -1 | 3 | Partial capture |
| 10-24 17:20 | 80m | -12 / - | RW0LZ/P | - / -13 | 3 | ✓ Closing fragment |
| 10-24 17:17 | 80m | +5 / - | UN8DSW | - / -1 | 2 | ✓ Closing fragment |
| 10-24 17:04 | 80m | -6 / - | HS0ZEE | - / -9 | 2 | Partial capture |
| 10-24 16:46 | 80m | -3 / - | RK9DO | - / +1 | 2 | ✓ Closing fragment |
| 10-24 16:45 | 80m | -5 / -3 | RA3VX | -8 / +1 | 7 | ✓ Full exchange observed |
| 10-24 16:45 | 80m | -4 / - | R1BED | - / -1 | 2 | ✓ Closing fragment |
| 10-24 16:43 | 80m | -4 / - | R2BPS | -12 / -10 | 4 | ✓ Closing observed |
| 10-24 16:42 | 80m | -4 / -15 | SM7WNM | -11 / -15 | 4 | ✓ Full exchange observed |
| 10-24 16:41 | 80m | -1 / - | JA8GWA | - / -5 | 3 | ✓ Closing fragment |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 044530 +2 2769 CT7AUT RU4F 73 044715 -2 2709 CU2DX RU4F LO23 (x2) 045130 +3 2709 TC2TR RU4F R-11 (x2) 045315 +0 2709 II1FAIR RU4F LO23 045430 -4 2709 EU4U RU4F LO23 045445 +2 2638 RU4F EU4U -02 045500 +0 2709 EU4U RU4F R-11 045515 -1 2637 RU4F EU4U RR73 045530 +0 2709 EU4U RU4F 73 045600 -3 2709 UB3ZKO RU4F -09 (x2) 045730 -3 2709 HA7TM RU4F -07 (x2)
UTC dB Audio Message 045515 -10 2703 R9CS/P RU4F LO23 (x2) 045600 +9 2481 RU4F UT/WE9G -01 045615 -10 2704 R9CS/P RU4F R-04 204615 -3 2172 OD5ZZ RU4F 73 204815 +1 2172 GM6DX RU4F -13 144915 +6 672 KH8A RU4F LO23 (x2) 041845 -1 2733 <TK/DH7SB> RU4F LO23 041945 -1 2733 <6W/IK2HKT> RU4F LO23 042045 -4 1033 RA6FCU/P RU4F LO23 042245 -9 1033 C5R RU4F LO23 (x2) 042700 -7 1933 UA6MF/P RU4F -12 042845 -12 1733 C5R RU4F LO23
UTC dB Audio Message 025830 -14 825 RU4F UA4FKT LO23 181045 -1 1113 RI1FJZ RU4F -24 (x2) 182815 -11 1782 BD4UJ RU4F -18 182915 -4 753 FK8HC RU4F -15 (x10)
UTC dB Audio Message 192345 -11 2443 DL70ESSEN RU4F -07 192445 -12 2443 TM0BSM RU4F -16 192515 -10 2443 BG7BMG RU4F -11 (x4) 192915 -10 2443 BG7BVI RU4F 73 193100 -9 2443 JI4POR RU4F RR73 165045 -6 2544 RA3RFT/1 RU4F -14 165115 -5 2544 C91RU RU4F LO23 (x6)
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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