OH4JFN — 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 OH4JFN, decoded by SO8OO in southeastern Poland. 1,303 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, across 64 UTC dates in the available aggregate history. Observed between 2026-06-29 and 2026-10-21.
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 1,303 FT8 messages attributed to OH4JFN as the transmitting token by decoded message structure across 64 UTC dates in the available aggregate history. The largest monitored-band total was 80 m (45%), followed by 40 m (43%) and 20 m (13%). The busiest six-hour window was 19:00-01:00 UTC, containing 49% of decodes. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -8.7 dB.
Overview
Bands
Last attributed message: 2026-10-21 08:04 UTC
Observed FT8 message patterns
- Attributed sample
- 1,303 messages
- Active dates
- 64 UTC dates
- Estimated median S/N
- -8.7 dB
- Estimated 10th-90th percentile
- -19 to +1.9 dB
- Recurring-pattern threshold
- Met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 249, moderate (-15 to -9 dB) 405, strong (≥ -8 dB) 649.
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 OH4JFN 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 OH4JFN
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
- KP32 · 935 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 1,432 km (approx.)
- Last such locator decoded
- 2026-10-21 08:04 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 | OH4JFN S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 10-21 08:04 | 40m | -18 / - | 6A1ST | - / - | 2 | Partial capture |
| 10-21 05:35 | 40m | -20 / - | YV6BXN | - / - | 3 | Partial capture |
| 10-21 05:00 | 40m | -12 / - | YV6BXN | - / - | 2 | Partial capture |
| 10-20 15:33 | 10m | - / -25 | CN8NS | -16 / - | 2 | Partial capture |
| 10-17 05:13 | 40m | -10 / - | M1EAG | -8 / -7 | 5 | ✓ Full exchange observed |
| 10-17 05:12 | 40m | -11 / - | CX6TU | - / - | 3 | Partial capture |
| 10-16 22:18 | 80m | -6 / - | 4X1YA | - / - | 2 | Partial capture |
| 10-16 19:14 | 40m | -3 / - | SP3AT | - / -12 | 5 | Partial capture |
| 10-16 18:15 | 40m | +4 / - | VK3AMP | - / - | 2 | Partial capture |
| 10-16 16:55 | 80m | -24 / - | OD5YA | - / - | 2 | Partial capture |
| 10-16 16:50 | 80m | -18 / - | YO8AAZ | -6 / -16 | 9 | Partial capture |
| 10-16 16:22 | 40m | +2 / +6 | DB6FA | -6 / -9 | 7 | ✓ Full exchange observed |
| 10-16 06:58 | 40m | -16 / - | VK7AC | - / - | 3 | Partial capture |
| 10-16 06:53 | 40m | -7 / - | VK7AC | - / - | 3 | Partial capture |
| 10-15 22:52 | 80m | - / -11 | F4IVG | -1 / - | 5 | Partial capture |
| 10-15 22:50 | 80m | -5 / -17 | EK/RX3DPK | -2 / - | 3 | Partial capture |
| 10-15 22:04 | 80m | - / -21 | EK/RX3DPK | -8 / - | 2 | Partial capture |
| 10-15 21:05 | 80m | -15 / - | R9CS/P | - / - | 7 | Partial capture |
| 10-15 20:12 | 80m | -10 / - | R9CS/P | - / - | 3 | Partial capture |
| 10-15 13:06 | 10m | - / - | EA7GB | -3 / - | 6 | Partial capture |
| 10-15 02:31 | 80m | +1 / - | 4L1FL | - / - | 3 | Partial capture |
| 10-14 23:23 | 80m | - / -22 | UK8FCM | -18 / - | 3 | ✓ Closing fragment |
| 10-14 23:20 | 80m | - / - | DL9KM | -9 / - | 7 | Partial capture |
| 10-14 23:19 | 80m | 0 / - | RA3ZDU | - / -8 | 2 | ✓ Closing fragment |
| 10-14 23:18 | 80m | -2 / -3 | F5PBG | -13 / -17 | 5 | ✓ Full exchange observed |
| 10-14 23:16 | 80m | -3 / -13 | Z61DX | -5 / - | 4 | ✓ Closing observed |
| 10-14 22:32 | 80m | -1 / 0 | 5B4AMM | +4 / - | 4 | ✓ Closing observed |
| 10-14 18:26 | 40m | -8 / -15 | IU4SQE | -11 / - | 5 | Partial capture |
| 10-14 04:14 | 80m | +1 / - | LX1TI | +8 / -12 | 6 | ✓ Closing observed |
| 10-13 21:09 | 80m | -2 / - | TA7ARH | - / -8 | 3 | ✓ Closing fragment |
| 10-13 19:24 | 40m | +6 / - | HL1AEY | - / - | 2 | Partial capture |
| 10-13 19:24 | 40m | -6 / - | 6M0MM | - / - | 2 | Partial capture |
| 10-12 22:52 | 80m | - / - | EB3JT | -12 / - | 2 | Partial capture |
| 10-12 22:49 | 80m | -6 / -14 | HG8LXL | +1 / -20 | 8 | ✓ Full exchange observed |
| 10-12 22:49 | 80m | +1 / -12 | YO4NF | +12 / -6 | 4 | ✓ Full exchange observed |
| 10-12 22:47 | 80m | 0 / -7 | 5B4AMX | +4 / -21 | 4 | ✓ Full exchange observed |
| 10-12 21:44 | 80m | -11 / - | OY1HJ | - / - | 2 | Partial capture |
| 10-12 17:56 | 40m | -11 / - | HL2ZN | - / - | 2 | Partial capture |
| 10-12 17:06 | 40m | -3 / -13 | RA0LQ | -14 / - | 5 | Partial capture |
| 10-11 05:26 | 40m | -15 / - | YY5EHT | - / - | 2 | Partial capture |
| 10-09 18:10 | 40m | -12 / -16 | 5B4AAB | -13 / - | 2 | Partial capture |
| 10-09 16:53 | 40m | -13 / - | SQ9SZ | - / - | 2 | Partial capture |
| 10-08 04:12 | 40m | - / -19 | OD5KU | 0 / - | 3 | ✓ Closing fragment |
| 10-07 19:07 | 80m | -12 / - | R8XF/M | - / - | 4 | Partial capture |
| 10-06 05:12 | 40m | -14 / - | YY5EHT | - / - | 4 | Partial capture |
| 10-05 13:37 | 40m | -20 / - | RA0LQ | - / - | 2 | Partial capture |
| 10-05 07:07 | 40m | -4 / - | GU0SUP | - / - | 3 | Partial capture |
| 10-05 04:58 | 40m | -6 / - | DL/PA2RO | - / - | 4 | Partial capture |
| 10-04 04:53 | 80m | - / -10 | DO3VE | +6 / - | 4 | ✓ Closing fragment |
| 10-04 04:51 | 80m | -13 / -17 | GU4WRP | -14 / -19 | 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 051330 -6 2344 OH4JFN M1EAG IO92 051345 -8 2344 M1EAG OH4JFN -07 051400 -12 2343 OH4JFN M1EAG R+15 051415 -11 2344 M1EAG OH4JFN RR73 051430 -6 2344 OH4JFN M1EAG 73 052200 -11 1987 N7JB OH4JFN KP32 041600 +9 832 OH4JFN P4/WE9V -13 041630 +9 832 OH4JFN RR73; YO4BXX <...> -22 050030 -6 1314 YV6BXN OH4JFN KP32 (x5) 080415 -16 1632 6A1ST OH4JFN KP32 (x2)
UTC dB Audio Message 105900 -10 2632 OH4JFN SV2AEL RR73 100000 -5 2113 OH4JFN F5OHS RR73 123845 -21 2099 OH4JFN UR5LY -05 (x4) 083745 -24 1714 OH4JFN A61FJ RR73 130600 -7 2520 OH4JFN EA7GB IM77 (x6) 153315 -17 2265 OH4JFN CN8NS -25 (x2)
UTC dB Audio Message 051500 -15 2005 EA8DO OH4JFN KP32 165045 -2 1871 OH4JFN YO8AAZ KN36 (x6) 165330 -15 1872 YO8AAZ OH4JFN -16 165345 -6 1871 OH4JFN YO8AAZ KN36 165400 -20 1872 YO8AAZ OH4JFN -16 165500 -24 1288 OD5YA OH4JFN KP32 (x2) 205115 -6 2044 OH4JFN 4Z5AV RR73 221815 -10 1704 4X1YA OH4JFN KP32 (x2)
UTC dB Audio Message 181445 -12 2934 OH4JFN YC9GBQ -11 181500 +2 2933 YC9GBQ OH4JFN R-05 181515 -11 2933 OH4JFN YC9GBQ -11 181530 +0 2933 YC9GBQ OH4JFN R-07 181545 -13 2933 OH4JFN YC9GBQ -11 181600 +4 2932 YC9GBQ OH4JFN R-09 (x5) 182015 -6 2882 9A3TGY OH4JFN KP32 (x3) 192430 -9 635 OH4JFN 7X2KF -21 (x2)
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