IS0JHV — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving IS0JHV, decoded by SO8OO in southeastern Poland. 7 FT8 messages attributed to this token as transmitter, on 40m, across 2 UTC dates in the available aggregate history. Observed between 2026-09-06 and 2026-09-20.
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 7 FT8 messages attributed to IS0JHV as the transmitting token by decoded message structure across 2 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (100%). In this small sample, the estimated median decoder S/N was -16 dB; no usual signal pattern is inferred.
Overview
Observed FT8 message patterns
- Attributed sample
- 7 messages
- Active dates
- 2 UTC dates
- Estimated median S/N
- -16 dB
- S/N percentile sample
- Too small
- Recurring-pattern threshold
- Not met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 4, moderate (-15 to -9 dB) 3, strong (≥ -8 dB) 0.
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 IS0JHV in decoded directed-looking exchanges:
Most frequent locator attributed to IS0JHV
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
- JN40 · 2 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 1,447 km (approx.)
- Last such locator decoded
- 2026-09-06 07:36 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 | IS0JHV S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 09-06 08:49 | 40m | - / -11 | DL8NW | -1 / - | 8 | Partial capture |
| 09-06 08:47 | 40m | - / - | HA3HZ | -10 / - | 2 | Partial capture |
| 09-06 08:44 | 40m | - / - | IN3ZWF | -12 / - | 3 | Partial capture |
| 09-06 07:46 | 40m | -17 / - | 4O7CC | -19 / -6 | 2 | ✓ Closing observed |
| 09-06 07:41 | 40m | - / -16 | PA2RO | -7 / - | 6 | ✓ Closing fragment |
| 09-06 07:40 | 40m | -14 / -1 | SQ100PKP | +10 / -12 | 4 | ✓ Full exchange observed |
| 09-06 07:39 | 40m | - / -7 | OM2APF | +1 / - | 6 | Partial capture |
| 09-06 07:36 | 40m | -16 / -1 | IK4IDY | -12 / 0 | 5 | ✓ Full exchange observed |
| 09-06 07:30 | 40m | - / +6 | DL9KMH | -13 / - | 4 | Partial capture |
| 09-05 08:15 | 40m | - / -3 | S51PV | -15 / - | 3 | ✓ Closing fragment |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 084530 -14 725 IS0JHV IN3ZWF JN56 (x2) 084730 -11 2684 IS0JHV HA3HZ JN96 (x2) 084900 +0 1870 IS0JHV DL8NW JO30 (x8) 071615 -14 1135 II9IAGM IS0JHV RR73 071830 -11 2091 IS0JHV SN100PKP R-13 072100 -14 2157 IS0JHV II6IALU R-11
UTC dB Audio Message 082230 -8 1468 IS0JHV SP2CG JO94
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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