R4FDK — 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 R4FDK, decoded by SO8OO in southeastern Poland. 8,662 FT8 messages attributed to this token as transmitter, on 160m, 80m, 40m, 20m, 10m, across 55 UTC dates in the available aggregate history. Observed between 2026-06-06 and 2026-10-23.
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 8,662 FT8 messages attributed to R4FDK as the transmitting token by decoded message structure across 55 UTC dates in the available aggregate history. The largest monitored-band total was 160 m (29%), followed by 20 m (25%) and 80 m (23%). Most decodes (55%) fell within the six-hour window 17:00-23:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -7 dB.
Overview
Bands
Last attributed message: 2026-10-23 04:17 UTC
Observed FT8 message patterns
- Attributed sample
- 8,662 messages
- Active dates
- 55 UTC dates
- Estimated median S/N
- -7 dB
- Estimated 10th-90th percentile
- -18.8 to +4 dB
- Recurring-pattern threshold
- Met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 1,494, moderate (-15 to -9 dB) 2,175, strong (≥ -8 dB) 4,993.
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 R4FDK 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 R4FDK
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 · 7,028 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 1,639 km (approx.)
- Last such locator decoded
- 2026-10-23 04:17 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 | R4FDK S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 10-23 03:54 | 80m | -5 / 0 | R2WAF | +2 / +1 | 5 | ✓ Full exchange observed |
| 10-23 03:53 | 80m | -5 / - | RU3DBT | - / +3 | 3 | ✓ Closing fragment |
| 10-23 03:44 | 80m | -4 / - | LA5WJA | - / -13 | 3 | Partial capture |
| 10-23 03:36 | 80m | - / -9 | S55DX | +8 / - | 2 | ✓ Closing fragment |
| 10-23 03:30 | 80m | -8 / - | UR5SG | - / - | 2 | Partial capture |
| 10-23 03:21 | 80m | -10 / -6 | SV1DKR | -12 / - | 3 | ✓ Closing observed |
| 10-23 03:12 | 80m | - / - | SV1ENG | -8 / - | 2 | Partial capture |
| 10-23 03:09 | 80m | - / - | SV1ENG | -12 / - | 3 | Partial capture |
| 10-23 03:07 | 80m | -5 / - | R7DX | - / - | 3 | Partial capture |
| 10-23 02:54 | 80m | +7 / - | 4L1FL | - / - | 5 | Partial capture |
| 10-23 02:36 | 80m | +3 / - | RW6HP | - / - | 6 | Partial capture |
| 10-23 02:04 | 80m | +1 / - | M7KEV | - / -16 | 11 | Partial capture |
| 10-23 01:58 | 80m | +4 / - | M7KEV | - / - | 2 | Partial capture |
| 10-23 01:49 | 80m | +4 / - | R2EA/P | - / - | 2 | Partial capture |
| 10-23 01:47 | 80m | +3 / - | P4/WE9V | - / - | 5 | Partial capture |
| 10-23 01:40 | 80m | -2 / -17 | UA9YK | -14 / -7 | 5 | ✓ Full exchange observed |
| 10-23 01:26 | 80m | +1 / - | R9JT | - / - | 7 | Partial capture |
| 10-23 01:24 | 80m | +4 / -15 | DL6ZFG | +12 / -16 | 5 | ✓ Full exchange observed |
| 10-23 01:16 | 80m | 0 / -18 | R2EA/P | 0 / - | 7 | ✓ Closing observed |
| 10-23 01:12 | 80m | -4 / +4 | RX7O | -15 / -14 | 5 | ✓ Full exchange observed |
| 10-23 00:56 | 80m | - / - | DL9ATW | +11 / - | 4 | Partial capture |
| 10-23 00:36 | 80m | +2 / - | RD7O | - / -5 | 3 | ✓ Closing fragment |
| 10-23 00:35 | 80m | +13 / -3 | DO4CNA | +16 / -7 | 5 | ✓ Full exchange observed |
| 10-23 00:23 | 80m | +6 / - | DO6SHB | +10 / - | 4 | ✓ Closing observed |
| 10-23 00:21 | 80m | 0 / -17 | UK8FF | -15 / - | 2 | Partial capture |
| 10-23 00:17 | 80m | -2 / -6 | R3SN | -4 / - | 4 | ✓ Closing observed |
| 10-23 00:14 | 80m | -1 / - | RA5AD | - / - | 3 | Partial capture |
| 10-23 00:10 | 80m | +1 / -5 | M0ODP | +3 / - | 8 | Partial capture |
| 10-22 23:56 | 80m | -2 / - | SP5UAF | - / - | 2 | ✓ Closing fragment |
| 10-22 23:52 | 80m | 0 / -19 | F1FPM | -8 / -18 | 6 | ✓ Full exchange observed |
| 10-22 23:47 | 80m | +5 / - | B21OBZ/P | - / - | 5 | Partial capture |
| 10-22 23:32 | 80m | -8 / -2 | HA7UL | +3 / - | 4 | ✓ Closing observed |
| 10-22 23:18 | 80m | +7 / - | 4L7T | - / - | 7 | Partial capture |
| 10-22 23:17 | 80m | +2 / - | 4X1UF | -7 / -13 | 4 | ✓ Closing observed |
| 10-22 23:15 | 80m | 0 / - | DO5HOK | +3 / -15 | 5 | ✓ Closing observed |
| 10-22 23:04 | 160m | +3 / -14 | SV8OVJ | -4 / -10 | 7 | ✓ Full exchange observed |
| 10-22 22:33 | 160m | -9 / - | EA8BS | - / - | 6 | Partial capture |
| 10-22 22:29 | 160m | -5 / -13 | DO3HJW | -4 / -9 | 4 | ✓ Full exchange observed |
| 10-22 22:26 | 160m | +6 / -1 | HA7TM | +12 / -3 | 4 | ✓ Full exchange observed |
| 10-22 22:17 | 160m | -7 / - | G4RGK | - / -21 | 6 | ✓ Closing fragment |
| 10-22 22:06 | 160m | -2 / - | G6PWS | - / - | 2 | Partial capture |
| 10-22 22:01 | 160m | -4 / - | M7CWF | -16 / -23 | 5 | ✓ Closing observed |
| 10-22 21:59 | 160m | -4 / +8 | HA8EV | +12 / -1 | 6 | ✓ Full exchange observed |
| 10-22 21:56 | 160m | +3 / -10 | DL1HDL | +3 / -7 | 6 | ✓ Full exchange observed |
| 10-22 21:44 | 160m | -5 / +6 | SQ7BFC | +8 / - | 3 | ✓ Closing observed |
| 10-22 21:38 | 160m | - / -3 | SQ7BFC | +6 / - | 2 | Partial capture |
| 10-22 21:37 | 160m | -5 / - | RW0UM | - / - | 7 | Partial capture |
| 10-22 21:34 | 160m | -8 / - | RA0AF | - / -4 | 3 | ✓ Closing fragment |
| 10-22 21:26 | 160m | -2 / -4 | DG1ABE | -3 / -12 | 5 | ✓ Full exchange observed |
| 10-22 21:21 | 160m | -6 / -15 | UA3ALY | +4 / +1 | 7 | ✓ Full exchange observed |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 035515 +0 1164 R2WAF R4FDK R+01 035530 +2 1163 R4FDK R2WAF RR73 035545 -7 1164 R2WAF R4FDK 73 040245 -4 1163 CQ R4FDK LO23 040315 -10 1163 R4ML R4FDK R-03 040915 -7 1165 CQ R4FDK LO23 (x3) 041030 -10 1756 R4FDK HA5UK -12 041045 -4 1164 CQ R4FDK LO23 (x6)
UTC dB Audio Message 222945 -6 1319 DO3HJW R4FDK 73 223330 -5 1359 EA8BS R4FDK LO23 (x6) 225230 +6 557 OE3UKW R4FDK LO23 230415 +2 551 R4FDK SV8OVJ R-14 (x2) 230630 +4 551 SV8OVJ R4FDK LO23 230645 -9 551 R4FDK SV8OVJ -06 230700 +4 552 SV8OVJ R4FDK R-10 230715 -8 551 R4FDK SV8OVJ RR73 230730 +2 551 SV8OVJ R4FDK 73
UTC dB Audio Message 211730 -4 1020 R4FDK G4FHL -17 (x2) 215000 -5 1120 R4FDK 9K2YM -09 (x2) 215230 +8 728 R4FDK G0RVY -15 (x2) 225630 -12 1209 R4FDK EA3DY -15 (x4) 232315 -15 1163 R4FDK EA5FD -12 (x2) 234330 +3 698 R4FDK P4/WE9V -08 003115 -14 1395 R4FDK M7MFS -10 (x2)
UTC dB Audio Message 185430 -2 2613 R4FDK DK2MAX JN58 (x2)
UTC dB Audio Message 173245 +13 816 CQ R4FDK LO23 (x4) 173445 +10 815 8Z1IT R4FDK LO23 (x6) 173815 +13 815 OH1OCA R4FDK LO23 (x4) 174145 +9 816 F4MZO R4FDK LO23
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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