SP4XDC — FT8 activity observed at SO8OO
Receiver-side FT8 activity involving SP4XDC, decoded by SO8OO in southeastern Poland. 33 FT8 messages attributed to this token as transmitter, on 160m, 40m, across 1 UTC dates in the available aggregate history. Last observed 2026-09-12.
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 33 FT8 messages attributed to SP4XDC as the transmitting token by decoded message structure across 1 UTC dates in the available aggregate history. The largest monitored-band total was 160 m (55%), followed by 40 m (45%). In this small sample, the estimated median decoder S/N was -11 dB; no usual signal pattern is inferred.
Overview
Bands
Last attributed message: 2026-09-12 19:41 UTC
Observed FT8 message patterns
- Attributed sample
- 33 messages
- Active dates
- 1 UTC dates
- Estimated median S/N
- -11 dB
- Estimated 10th-90th percentile
- -17 to +2 dB
- Recurring-pattern threshold
- Not met
SO8OO display ranges among successful decodes: weak (≤ -16 dB) 6, moderate (-15 to -9 dB) 11, strong (≥ -8 dB) 16.
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 SP4XDC in decoded directed-looking exchanges:
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 | SP4XDC S/N | Counterpart | Counterpart S/N | Msgs | Capture |
|---|---|---|---|---|---|---|
| 09-12 19:43 | 160m | - / - | UA4FET | -13 / - | 2 | Partial capture |
| 09-12 19:39 | 160m | -12 / - | RT4A/P | - / - | 3 | Partial capture |
| 09-12 19:27 | 160m | -15 / - | UA4FKT | -9 / -8 | 6 | Partial capture |
| 09-12 19:26 | 160m | -14 / - | OH5KNL | -17 / +6 | 4 | ✓ Full exchange observed |
| 09-12 19:21 | 160m | -16 / - | G7RAU | - / -15 | 6 | ✓ Closing fragment |
| 09-12 19:06 | 160m | -12 / - | F5RMK | - / -24 | 4 | Partial capture |
| 09-12 18:50 | 40m | 0 / +7 | DJ0MAB | -5 / -7 | 5 | ✓ Full exchange observed |
| 09-12 18:49 | 40m | +4 / +8 | M3JCE | -17 / -14 | 3 | ✓ Full exchange observed |
| 09-12 18:40 | 40m | -8 / - | UA9LLE | - / -11 | 2 | Partial capture |
| 09-12 18:25 | 40m | -4 / - | 5Z4VJ | - / -14 | 4 | Partial capture |
| 09-12 18:20 | 40m | +1 / - | 5Z4VJ | - / 0 | 5 | Partial capture |
| 07-13 22:17 | 20m | - / -13 | EA1IOK | -2 / - | 3 | Partial capture |
Recent FT8 messages decoded at SO8OO
Frequency values are decoder audio offsets in hertz, not RF frequencies.
UTC dB Audio Message 192715 -14 1495 OH5KNL SP4XDC RR73 192730 -5 1495 SP4XDC UA4FKT LO23 192730 -16 2342 SP4XDC OH5KNL 73 192800 -12 1495 SP4XDC UA4FKT LO23 (x2) 192915 -17 1495 UA4FKT SP4XDC -08 (x3) 193945 -12 1495 RT4A/P SP4XDC +18 (x3) 194200 +11 1036 SP4XDC RR73; SP9MRP <...> +06 194330 -16 1946 SP4XDC UA4FET LO13 (x2) 194430 +15 1036 SP4XDC RR73; OM4KK <...> +02
UTC dB Audio Message 182530 -4 1533 5Z4VJ SP4XDC -14 (x4) 184045 -8 1533 UA9LLE SP4XDC -11 (x2) 184345 -7 1534 SQ9AQQ SP4XDC RR73 184945 +3 1533 M3JCE SP4XDC -14 185000 -17 2161 SP4XDC M3JCE R+08 185015 +5 1534 M3JCE SP4XDC RR73 185030 -6 1534 SP4XDC DJ0MAB JN49 (x2) 185115 +0 1533 DJ0MAB SP4XDC -07 185130 -6 1534 SP4XDC DJ0MAB R+07 (x2)
UTC dB Audio Message 221715 +1 571 SP4XDC EA1IOK IN62 (x3)
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