ON5SV — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving ON5SV, decoded by SO8OO in southeastern Poland. 29 FT8 messages attributed to this token as transmitter, on 40m, 20m, 10m, across 6 UTC dates in the available aggregate history. Observed between 2026-06-06 and 2026-06-20.
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 29 FT8 messages attributed to ON5SV as the transmitting token by decoded message structure across 6 UTC dates in the available aggregate history. The largest monitored-band total was 10 m (41%), followed by 40 m (34%) and 20 m (24%). Most decodes (66%) fell within the six-hour window 08:00-14:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -11 dB.
Overview
Bands
Last attributed message: 2026-06-20 02:53 UTC
Observed FT8 message patterns
- Attributed sample
- 29 messages
- Active dates
- 6 UTC dates
- Estimated median S/N
- -11 dB
- Estimated 10th-90th percentile
- -20 to -2 dB
- Recurring-pattern threshold
- Met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 7, moderate (-15 to -9 dB) 15, strong (≥ -8 dB) 7.
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 ON5SV in decoded directed-looking exchanges:
Most frequent locator attributed to ON5SV
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
- JO10 · 15 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 1,335 km (approx.)
- Last such locator decoded
- 2026-06-20 02:52 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 | ON5SV S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 07-22 05:57 | 20m | - / -11 | LZ2KV | -2 / - | 3 | ✓ Closing fragment |
| 07-20 06:34 | 10m | - / -11 | RC5F | -11 / - | 2 | ✓ Closing fragment |
| 07-20 06:08 | 10m | - / -9 | RK3AW | -21 / - | 2 | Partial capture |
| 07-08 07:08 | 10m | - / - | US3LX | -9 / - | 3 | Partial capture |
| 07-08 07:01 | 10m | - / -20 | RV6HE | -22 / - | 3 | Partial capture |
| 07-07 08:29 | 20m | - / +2 | F4HSB | -18 / - | 2 | Partial capture |
| 07-07 08:28 | 20m | - / -22 | DH1HF | -22 / - | 2 | ✓ Closing fragment |
| 07-07 08:24 | 20m | - / -14 | DL3MIB | -12 / - | 4 | ✓ Closing fragment |
| 07-07 07:58 | 20m | - / -10 | OE5CCN | -11 / - | 2 | ✓ Closing fragment |
| 07-06 08:52 | 10m | - / -2 | DO1ID | -15 / - | 3 | Partial capture |
| 07-06 08:51 | 10m | - / -1 | 2E0TFC | -20 / - | 3 | Partial capture |
| 06-26 06:04 | 40m | - / -15 | OE6TNO | -11 / - | 3 | Partial capture |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 082445 -8 1110 ON5SV DL3MIB JN57 (x4) 082745 -12 615 ON5SV R5AV RR73 082845 -24 1290 ON5SV DH1HF R-22 082915 -19 1858 ON5SV F4HSB JN37 082915 -20 1290 ON5SV DH1HF 73 082945 -16 1858 ON5SV F4HSB R+02 083115 -15 2559 ON5SV IQ4JO JN63 (x2) 090315 -24 1540 ON5SV PD1HBL JO21 055730 +2 819 ON5SV LZ2KV -11 (x3)
UTC dB Audio Message 065445 -7 981 ON5SV DK4FH JO64 065845 -11 654 ON5SV HG8IT -17 060430 -11 627 ON5SV OE6TNO JN77 (x3) 060715 -5 878 ON5SV SP7TF -17 073100 -6 2735 ON5SV IQ4JO JN63 (x2)
UTC dB Audio Message 085445 -17 1476 ON5SV DO1ID R-02 065715 -4 2954 ON5SV DO1FDK JO41 074100 -16 915 ON5SV LB2WD -12 102300 -21 1186 ON5SV PE9JAN JO22 070115 -21 1949 ON5SV RV6HE -20 (x3) 070800 -16 1172 ON5SV US3LX KN89 (x3) 060845 -17 1080 ON5SV RU3GF -17 060845 -20 1389 ON5SV RK3AW -09 (x2) 063400 -9 1688 ON5SV RC5F -11 (x2)
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