F4HJN — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving F4HJN, decoded by SO8OO in southeastern Poland. 175 FT8 messages attributed to this token as transmitter, on 20m, 10m, across 20 UTC dates in the available aggregate history. Observed between 2026-06-14 and 2026-08-22.
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 175 FT8 messages attributed to F4HJN as the transmitting token by decoded message structure across 20 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (87%), followed by 10 m (13%). Several six-hour UTC windows tied for the largest share (83%), so no unique busiest interval is claimed. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -9 dB.
Overview
Bands
Last attributed message: 2026-08-22 14:59 UTC
Observed FT8 message patterns
- Attributed sample
- 175 messages
- Active dates
- 20 UTC dates
- Estimated median S/N
- -9 dB
- Estimated 10th-90th percentile
- -18 to -2 dB
- Recurring-pattern threshold
- Met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 32, moderate (-15 to -9 dB) 65, strong (≥ -8 dB) 78.
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 F4HJN 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 F4HJN
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
- JN37 · 99 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 1,116 km (approx.)
- Last such locator decoded
- 2026-08-22 14:59 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 | F4HJN S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 08-22 14:59 | 20m | -10 / - | M1DBB | - / - | 2 | Partial capture |
| 08-20 18:42 | 20m | - / -15 | JA0LFV | -24 / - | 2 | Partial capture |
| 08-13 18:21 | 20m | -6 / -3 | TN8GD | -7 / -23 | 3 | Partial capture |
| 08-13 18:20 | 20m | -6 / - | MI0JZZ | - / -20 | 2 | ✓ Closing fragment |
| 08-13 18:17 | 20m | -7 / - | OZ9FF | - / -26 | 2 | Partial capture |
| 08-13 18:13 | 20m | -8 / -9 | CN8NS | -21 / -22 | 5 | ✓ Full exchange observed |
| 08-11 19:32 | 10m | - / -10 | SV2CLJ | -7 / - | 3 | ✓ Closing fragment |
| 08-10 20:40 | 20m | -9 / - | 3A2MW | - / - | 4 | Partial capture |
| 08-10 20:16 | 20m | -10 / - | JI4POR | - / 0 | 2 | Partial capture |
| 08-08 21:06 | 20m | -12 / - | XW4KV | - / -18 | 8 | ✓ Closing fragment |
| 08-08 21:03 | 20m | -8 / - | XW4KV | - / - | 2 | Partial capture |
| 08-08 20:56 | 20m | -14 / - | RY4D | - / -14 | 6 | Partial capture |
| 08-06 21:21 | 20m | -16 / - | HZ1OL | - / -1 | 3 | ✓ Closing fragment |
| 08-06 21:15 | 20m | -11 / - | SP6AXW | - / -5 | 4 | ✓ Closing fragment |
| 08-06 21:12 | 20m | -12 / -5 | R9AL | -10 / - | 4 | ✓ Closing observed |
| 07-26 20:33 | 20m | +1 / - | JH8SIT | - / -21 | 3 | ✓ Closing fragment |
| 07-26 20:28 | 20m | -6 / - | EX8ABR | - / - | 9 | Partial capture |
| 07-26 20:27 | 20m | +4 / - | UA9UFJ | - / - | 2 | Partial capture |
| 07-26 20:14 | 20m | -9 / - | RA9SJG | - / -6 | 3 | ✓ Closing fragment |
| 07-26 20:12 | 20m | -7 / - | RK0SC | - / - | 2 | ✓ Closing fragment |
| 07-26 20:07 | 20m | -10 / -15 | R3UAX | -4 / -8 | 5 | ✓ Full exchange observed |
| 07-26 20:02 | 20m | -2 / - | R0CBS | - / -11 | 5 | ✓ Closing fragment |
| 07-26 20:01 | 20m | +4 / - | BG5JGG | - / -14 | 2 | ✓ Closing fragment |
| 07-24 21:38 | 20m | -1 / - | XV9B | - / -9 | 9 | ✓ Closing fragment |
| 07-24 21:36 | 20m | -6 / - | BI8SCC | - / - | 2 | Partial capture |
| 07-24 21:33 | 20m | -7 / - | JA9FFS | - / -16 | 6 | ✓ Closing fragment |
| 07-24 21:29 | 20m | -5 / - | JA9FFS | - / - | 3 | Partial capture |
| 07-22 20:17 | 20m | -2 / - | JE1LFX | - / - | 2 | Partial capture |
| 07-22 20:15 | 20m | -13 / - | BI4AJO | - / -1 | 2 | ✓ Closing fragment |
| 07-22 20:03 | 20m | -17 / - | F5HMS | - / -9 | 5 | ✓ Closing fragment |
| 07-22 19:57 | 20m | -16 / - | 9K2MP | - / - | 2 | Partial capture |
| 07-18 19:57 | 10m | -11 / - | IS0UWS | - / - | 3 | Partial capture |
| 07-18 19:52 | 10m | -18 / - | RU6UR | - / 0 | 3 | ✓ Closing fragment |
| 07-18 19:51 | 10m | -12 / - | 2E0CVN | - / -17 | 2 | ✓ Closing fragment |
| 07-18 19:46 | 10m | -8 / - | <...> | - / -4 | 3 | Partial capture |
| 07-18 19:44 | 10m | -10 / - | R4CJA | - / - | 2 | ✓ Closing fragment |
| 07-18 19:43 | 10m | -8 / - | RU6UR | - / - | 2 | Partial capture |
| 07-13 11:55 | 20m | -15 / - | VU2KPH | - / - | 2 | Partial capture |
| 07-13 11:52 | 20m | -6 / - | JG3LGD | - / - | 2 | Partial capture |
| 07-13 11:51 | 20m | -12 / - | BG8HNC | - / - | 2 | Partial capture |
| 07-13 11:48 | 20m | -14 / - | JR5MJS | - / - | 2 | Partial capture |
| 07-13 11:47 | 20m | -11 / -8 | CN2DX | -13 / -1 | 4 | ✓ Full exchange observed |
| 07-12 21:27 | 20m | -19 / - | BH4THI | - / -14 | 3 | Partial capture |
| 07-02 19:59 | 20m | -16 / - | JH5AVM | -21 / - | 2 | Partial capture |
| 07-02 19:58 | 20m | -18 / - | RA4ADF | -9 / -3 | 3 | ✓ Closing observed |
| 06-28 15:25 | 10m | -9 / - | DO5HOK | -14 / - | 2 | ✓ Closing observed |
| 06-28 15:22 | 10m | -20 / - | OE1GAQ | - / -2 | 3 | ✓ Closing fragment |
| 06-27 22:38 | 20m | - / -1 | Z62NS | -12 / - | 2 | ✓ Closing fragment |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 182045 -6 2860 MI0JZZ F4HJN 73 182115 -6 2860 TN8GD F4HJN JN37 182130 -7 535 F4HJN TN8GD -03 182215 -5 2860 TN8GD F4HJN R-23 184230 -23 1951 F4HJN JA0LFV -15 (x2) 184545 -5 2863 R3DFE/M F4HJN JN37 191100 -15 1268 <...> F4HJN JN37 192115 -13 2102 F4HJN LA3BO -14 192600 -1 2863 OK2VND F4HJN JN37 193915 -11 2863 RD0L F4HJN R-12 211000 +0 2862 TF8KW F4HJN JN37 145015 -8 2865 M7JVT F4HJN R-14 145900 -9 2863 M1DBB F4HJN JN37 (x2)
UTC dB Audio Message 194745 -9 1040 <...> F4HJN R-04 195100 -8 1860 2E0CVN F4HJN R-17 (x2) 195215 -18 1671 RU6UR F4HJN JN37 (x3) 195545 -3 1393 RA3QQI F4HJN JN37 195715 -10 1537 IS0UWS F4HJN JN37 (x3) 191430 -21 2163 F4HJN F1VEO -02 190930 -24 1550 IT9ACJ F4HJN JN37 193230 -5 681 F4HJN SV2CLJ -10 (x3)
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.
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