F4HSL — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving F4HSL, decoded by SO8OO in southeastern Poland. 9 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, across 2 UTC dates in the available aggregate history. Observed between 2026-08-31 and 2026-09-04.
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 9 FT8 messages attributed to F4HSL as the transmitting token by decoded message structure across 2 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (44%), followed by 80 m (33%) and 40 m (22%). In this small sample, the estimated median decoder S/N was -10 dB; no usual signal pattern is inferred.
Overview
Bands
Last attributed message: 2026-09-04 20:32 UTC
Observed FT8 message patterns
- Attributed sample
- 9 messages
- Active dates
- 2 UTC dates
- Estimated median S/N
- -10 dB
- S/N percentile sample
- Too small
- Recurring-pattern threshold
- Not met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 0, moderate (-15 to -9 dB) 6, strong (≥ -8 dB) 3.
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. The sample does not meet the threshold for a recurring time or signal-pattern claim (20 attributed messages, three UTC dates and five distinct 15-minute windows).
Frequent counterpart tokens observed at SO8OO
Tokens most often paired with F4HSL in decoded directed-looking exchanges:
Most frequent locator attributed to F4HSL
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
- IN99 · 7 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 1,633 km (approx.)
- Last such locator decoded
- 2026-09-04 20:32 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 | F4HSL S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 09-04 20:31 | 80m | -12 / - | JH2FXK | - / - | 3 | Partial capture |
| 09-04 20:20 | 40m | -4 / -10 | HB9XBY | -5 / -10 | 6 | ✓ Full exchange observed |
| 08-31 11:25 | 20m | -7 / - | R9UBE | - / - | 2 | Partial capture |
| 08-31 11:23 | 20m | -11 / -1 | EB3JT | +2 / - | 4 | ✓ Closing observed |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 202930 -12 1434 F4HSL OV6ZM RR73 203130 -12 833 JH2FXK F4HSL IN99 (x3)
UTC dB Audio Message 202045 -5 643 F4HSL HB9XBY -10 202100 -5 940 HB9XBY F4HSL IN99 202115 -6 643 F4HSL HB9XBY -10 (x2) 202200 -4 940 HB9XBY F4HSL R-10 202245 -5 643 F4HSL HB9XBY RR73 202315 -8 2962 F4HSL JH0AHI PM97
UTC dB Audio Message 112200 -11 978 OM7AMA F4HSL IN99 112315 +6 978 F4HSL EB3JT JN01 (x2) 112430 -11 978 EB3JT F4HSL RR73 112445 +0 978 F4HSL EB3JT 73 112500 -5 978 R9UBE F4HSL IN99 (x2) 112815 -3 2531 F4HSL EA3CFV -05
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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