ON3SDV — reception at SO8OO
Signals decoded by SO8OO in southeastern Poland. FT8 and CW have separate histories; all times are UTC.
FT8 activity
Receiver-side FT8 activity involving ON3SDV, decoded by SO8OO in southeastern Poland. 103 FT8 messages attributed to this token as transmitter, on 40m, 20m, across 26 UTC dates in the available aggregate history. Observed between 2026-06-07 and 2026-10-15.
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 103 FT8 messages attributed to ON3SDV as the transmitting token by decoded message structure across 26 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (59%), followed by 40 m (41%). Several six-hour UTC windows tied for the largest share (66%), so no unique busiest interval is claimed. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -12 dB.
Overview
Bands
Last attributed message: 2026-10-15 04:38 UTC
Observed FT8 message patterns
- Attributed sample
- 103 messages
- Active dates
- 26 UTC dates
- Estimated median S/N
- -12 dB
- Estimated 10th-90th percentile
- -17 to +3 dB
- Recurring-pattern threshold
- Met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 24, moderate (-15 to -9 dB) 41, strong (≥ -8 dB) 38.
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 ON3SDV 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 ON3SDV
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 · 53 decoded messages
- SO8OO receiver locator
- KN09VW
- Locator-centre separation
- 1,335 km (approx.)
- Last such locator decoded
- 2026-10-15 04:31 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 | ON3SDV S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 11-05 20:16 | 40m | - / - | EA7GUM | -21 / - | 3 | Partial capture |
| 11-05 20:06 | 40m | - / +3 | G8KHF | -11 / - | 2 | ✓ Closing fragment |
| 10-20 13:17 | 40m | - / -1 | G0RVY | -9 / - | 2 | Partial capture |
| 10-15 04:38 | 40m | -16 / -11 | ON6PL | -2 / -10 | 3 | ✓ Full exchange observed |
| 10-15 04:31 | 40m | -15 / - | II5GG | - / +2 | 3 | ✓ Closing fragment |
| 10-15 04:30 | 40m | -8 / - | EC3A | -2 / +9 | 3 | ✓ Closing observed |
| 10-15 04:22 | 40m | - / -18 | RK9UE | -2 / - | 2 | ✓ Closing fragment |
| 10-12 07:14 | 40m | - / -15 | 9A5CW | +4 / - | 2 | ✓ Closing fragment |
| 10-05 07:38 | 40m | -14 / - | EI8HV | - / -10 | 2 | Partial capture |
| 10-05 07:36 | 40m | -12 / -16 | DL7UKM | -3 / -1 | 7 | ✓ Full exchange observed |
| 10-05 07:34 | 40m | -15 / -3 | OZ7DR | -8 / -3 | 5 | ✓ Full exchange observed |
| 10-05 07:31 | 40m | -12 / - | DL7UKM | - / - | 3 | Partial capture |
| 10-04 07:08 | 40m | -13 / - | IQ2AAH | -10 / +1 | 2 | ✓ Closing observed |
| 10-04 07:00 | 40m | -14 / - | EC5M | - / -3 | 4 | Partial capture |
| 10-04 06:59 | 40m | -14 / -13 | OK1ZJK | +11 / +4 | 4 | ✓ Full exchange observed |
| 09-16 13:31 | 40m | - / -9 | HB9ELE | -1 / - | 2 | Partial capture |
| 09-16 13:27 | 40m | - / -6 | DL6EL | +2 / - | 2 | ✓ Closing fragment |
| 09-16 13:16 | 40m | - / - | DL6EL | +5 / - | 3 | Partial capture |
| 09-10 06:54 | 40m | - / -18 | DF1IH | +3 / - | 2 | ✓ Closing fragment |
| 09-10 06:50 | 40m | - / -1 | 9A7BB | +8 / - | 2 | ✓ Closing fragment |
| 09-06 06:41 | 40m | - / -14 | GJ0KYZ | -6 / - | 2 | ✓ Closing fragment |
| 08-30 06:53 | 40m | - / -15 | DF9HT/P | -7 / - | 11 | Partial capture |
| 08-30 06:49 | 40m | - / - | UT2PC | +14 / - | 3 | Partial capture |
| 08-30 06:47 | 40m | - / 0 | DK2M | +8 / - | 2 | ✓ Closing fragment |
| 08-30 06:37 | 20m | - / +1 | Z62NS | +3 / - | 3 | ✓ Closing fragment |
| 08-26 06:50 | 20m | +3 / - | UT5ZC | - / - | 2 | Partial capture |
| 08-26 06:47 | 20m | +3 / - | CO8LY | - / -4 | 3 | ✓ Closing fragment |
| 08-26 06:45 | 20m | +2 / - | EU2Q | - / -1 | 4 | ✓ Closing fragment |
| 08-24 07:11 | 20m | - / -13 | EC3A | -4 / - | 2 | ✓ Closing fragment |
| 08-24 07:08 | 20m | - / -12 | S56EPX | 0 / - | 4 | ✓ Closing fragment |
| 08-24 06:57 | 20m | - / -8 | IK4LZH | +10 / - | 2 | ✓ Closing fragment |
| 08-22 15:13 | 20m | - / 0 | M7JVT | -4 / - | 2 | ✓ Closing fragment |
| 08-21 18:46 | 20m | -14 / - | BA3NZ | - / -17 | 2 | Partial capture |
| 08-21 18:42 | 20m | - / -14 | JR7RHO | -8 / - | 2 | ✓ Closing fragment |
| 08-21 13:35 | 20m | - / -9 | HA1BF | +13 / - | 4 | ✓ Closing fragment |
| 08-21 13:32 | 20m | -8 / -1 | DL3EBJ | -4 / - | 3 | ✓ Closing observed |
| 08-18 18:58 | 40m | -12 / -14 | ON4AOI | +7 / -1 | 3 | ✓ Full exchange observed |
| 08-18 18:57 | 40m | -12 / - | 9A5E | 0 / -6 | 4 | ✓ Closing observed |
| 08-18 18:40 | 40m | - / -18 | PG4T | -8 / - | 2 | ✓ Closing fragment |
| 08-17 06:30 | 20m | -15 / - | SP2SGZ | - / - | 2 | Partial capture |
| 08-17 06:26 | 20m | - / -12 | YO4GIY | +2 / - | 2 | ✓ Closing fragment |
| 08-15 06:21 | 20m | -17 / - | EA5OL | -13 / -4 | 2 | ✓ Closing observed |
| 08-15 06:19 | 20m | - / -13 | SV2HTW | -8 / - | 2 | ✓ Closing fragment |
| 08-12 06:48 | 20m | - / -13 | LZ1ZF | -11 / - | 2 | ✓ Closing fragment |
| 08-10 06:53 | 20m | - / -2 | LZ1ZF | -10 / - | 2 | ✓ Closing fragment |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 043215 -12 841 II5GG ON3SDV R+02 (x2) 043800 -1 896 ON3SDV ON6PL -11 043815 -16 841 ON6PL ON3SDV R-10 043830 -3 600 ON3SDV ON6PL RR73 071330 -9 611 ON3SDV G8KHF RR73 131730 -8 978 ON3SDV G0RVY -01 (x2) 200600 -10 847 ON3SDV G8KHF +03 (x2) 200800 -10 532 ON3SDV PC40EUDXF +15 201645 -24 1196 ON3SDV EA7GUM RRR (x3) 202400 -17 1170 ON3SDV ON6OM RR73
UTC dB Audio Message 071230 -14 1025 ON3SDV DM2DXA +14 064515 +5 882 EU2Q ON3SDV JO10 (x4) 064715 +7 882 CO8LY ON3SDV JO10 (x3) 065015 +3 882 UT5ZC ON3SDV JO10 (x2) 190915 +6 644 ON3SDV EA5OL RR73 194430 +7 585 ON3SDV EC3A RR73 063700 +7 781 ON3SDV Z62NS +01 (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.
CW
No CW receptions recorded for this callsign in the last 30 days.
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