F4JYI — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving F4JYI, decoded by SO8OO in southeastern Poland. 49 FT8 messages attributed to this token as transmitter, on 20m, across 8 UTC dates in the available aggregate history. Observed between 2026-06-21 and 2026-08-26.
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 49 FT8 messages attributed to F4JYI as the transmitting token by decoded message structure across 8 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (100%). Several six-hour UTC windows tied for the largest share (69%), so no unique busiest interval is claimed. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -13 dB.
Overview
Observed FT8 message patterns
- Attributed sample
- 49 messages
- Active dates
- 8 UTC dates
- Estimated median S/N
- -13 dB
- Estimated 10th-90th percentile
- -20 to -6 dB
- Recurring-pattern threshold
- Met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 16, moderate (-15 to -9 dB) 21, strong (≥ -8 dB) 12.
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 F4JYI 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 F4JYI
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
- JN03 · 42 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 1,732 km (approx.)
- Last such locator decoded
- 2026-07-23 19:35 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 | F4JYI S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 08-26 11:44 | 20m | -16 / -18 | PD3LKN | -6 / -7 | 6 | ✓ Full exchange observed |
| 08-01 09:24 | 20m | - / -18 | SV9MBL | -14 / - | 2 | Partial capture |
| 07-23 19:32 | 20m | -12 / - | PY1CDE | - / - | 6 | Partial capture |
| 07-23 17:47 | 20m | -14 / - | K9LZJ | - / - | 6 | Partial capture |
| 06-30 05:41 | 20m | -9 / - | K0C | - / - | 5 | Partial capture |
| 06-30 05:31 | 20m | -11 / - | W7KZ | - / - | 3 | Partial capture |
| 06-30 05:13 | 20m | -9 / - | K6JBT | - / -18 | 2 | ✓ Closing fragment |
| 06-29 05:51 | 20m | -18 / - | KZ7K | - / - | 5 | Partial capture |
| 06-24 05:17 | 20m | -12 / - | KD2YCK | - / - | 5 | Partial capture |
| 06-23 04:28 | 20m | -16 / - | WI4USA | - / - | 4 | Partial capture |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 193315 -10 1222 PY1CDE F4JYI JN03 (x5) 071845 -16 1223 SP9DAT F4JYI RR73 (x2) 092445 -12 2396 F4JYI SV9MBL -18 (x2) 114430 -4 1203 F4JYI PD3LKN JO22 (x2) 114545 -17 1203 PD3LKN F4JYI -07 114600 -8 1202 F4JYI PD3LKN R-18 114615 -12 1203 PD3LKN F4JYI RR73 (x2)
UTC dB Audio Message 045730 -19 2289 F4JYI 4O7CC -21 052130 -22 1607 F4JYI YR50NADIA -13
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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