SP4TXI — reception at SO8OO

Signals decoded by SO8OO in southeastern Poland. FT8 and CW have separate histories; all times are UTC.

FT8 activity

DXCC entity inferred from callsign: Poland Most frequent locator attributed to this token: KO03

Receiver-side FT8 activity involving SP4TXI, decoded by SO8OO in southeastern Poland. 108 FT8 messages attributed to this token as transmitter, on 80m, 40m, across 9 UTC dates in the available aggregate history. Observed between 2026-06-10 and 2026-10-18.

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 108 FT8 messages attributed to SP4TXI as the transmitting token by decoded message structure across 9 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (69%), followed by 80 m (31%). Several six-hour UTC windows tied for the largest share (82%), so no unique busiest interval is claimed. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (73%); the estimated median was +2 dB.

Overview

108
Messages attributed
9
UTC dates decoded
15
Active 15-min windows
+2 dB
Estimated median S/N

Bands

80m · 33 40m · 75
First attributed message: 2026-06-10
Last attributed message: 2026-10-18 22:23 UTC

Observed FT8 message patterns

Attributed sample
108 messages
Active dates
9 UTC dates
Estimated median S/N
+2 dB
Estimated 10th-90th percentile
-12 to +14 dB
Recurring-pattern threshold
Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 5, moderate (-15 to -9 dB) 24, strong (≥ -8 dB) 79.

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 SP4TXI 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 SP4TXI

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
KO03 · 42 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
400 km (approx.)
Last such locator decoded
2026-10-18 22:22 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 UTCBandSP4TXI S/NCounterpartCounterpart S/NMsgsCapture
10-18 22:22 80m +11 / +1 R4FDK -9 / -1 5 ✓ Full exchange observed
10-18 22:21 80m +12 / - SP4WJ - / -5 2 ✓ Closing fragment
10-18 22:18 80m +11 / - DL4KSD -3 / -5 3 ✓ Closing observed
10-18 22:17 80m +14 / - IU8FUI - / -10 2 ✓ Closing fragment
10-18 22:17 80m +12 / -2 EA2EWL -21 / -17 5 ✓ Full exchange observed
10-18 22:15 80m +16 / +3 DO5HB -7 / -3 5 ✓ Full exchange observed
10-18 22:15 80m - / +1 F1PBZ -1 / - 3 Partial capture
10-18 22:14 80m +14 / -3 RA9FUE -9 / -6 5 ✓ Full exchange observed
10-18 22:12 80m +16 / - SQ9RIM +19 / - 6 ✓ Full exchange observed
10-18 22:12 80m +15 / -8 F1IQH -6 / -6 5 ✓ Full exchange observed
10-18 22:11 80m +16 / - RA0SCA - / -10 2 ✓ Closing fragment
10-18 22:08 80m +12 / - DK2LG - / - 2 ✓ Closing fragment
10-18 22:07 80m +10 / +6 R2BIU -8 / -7 4 ✓ Full exchange observed
10-18 22:04 80m +7 / - SB7W - / - 2 Partial capture
10-11 18:55 40m -11 / - Z62NS - / +1 3 ✓ Closing fragment
10-11 18:53 40m -14 / - EY7BM - / - 3 ✓ Closing fragment
09-25 08:11 10m - / +1 RA9ACA -8 / - 2 ✓ Closing fragment
09-23 11:11 40m -1 / 0 9A9TT -6 / +4 5 ✓ Full exchange observed
09-23 11:10 40m +1 / - HB10GBT - / -2 2 Partial capture
09-21 22:48 40m - / - RZ4FWA -12 / - 2 Partial capture
09-21 22:47 40m -9 / - RI1FJZ - / - 4 ✓ Closing fragment
09-21 22:43 40m - / +4 CT2HEX -4 / - 2 Partial capture
09-21 22:39 40m -11 / - HI3RRR -12 / -6 3 ✓ Full exchange observed
09-21 22:37 40m - / - M9STN -16 / - 2 Partial capture
09-21 22:32 40m -16 / - G0ABI -4 / - 4 ✓ Closing observed
09-21 22:29 40m -10 / - M1WLK -6 / -8 3 Partial capture
09-21 22:29 40m -12 / +8 M0LAD +9 / - 6 ✓ Full exchange observed
09-21 22:27 40m -24 / - BG3NQT - / -24 2 ✓ Closing fragment
09-21 22:24 40m - / -14 NP4PR -18 / - 2 ✓ Closing fragment
09-11 00:18 40m - / +6 SV9QWC -6 / - 2 ✓ Closing fragment
09-11 00:15 40m - / -19 EU1KI -22 / - 2 Partial capture
09-11 00:11 40m - / -11 CR7BRV -8 / - 2 ✓ Closing fragment
09-11 00:08 40m - / - UR9QQ -14 / - 2 Partial capture
08-26 04:46 40m -11 / - UA4FKT -5 / - 3 ✓ Closing observed
08-26 04:44 40m -11 / -12 UA3POG -14 / +8 4 ✓ Full exchange observed
08-26 04:41 40m -8 / -6 IR7MGGC -7 / +4 5 Partial capture
07-27 14:43 10m - / +6 F4ILK -11 / - 2 Partial capture

Recent FT8 messages decoded at SO8OO

Frequency values are decoder audio offsets in hertz, not RF frequencies.

80m 
UTC    dB Audio  Message
221845 -23 1784  SP4TXI EA2EWL R-02
221845  -3  851  SP4TXI DL4KSD JO71
221900 +11  851  EA2EWL SP4TXI RR73
221930 +13  851  DL4KSD SP4TXI -05 (x2)
222030  +5  851  CQ SP4TXI KO03 (x2)
222130 +11  910  SP4WJ SP4TXI -05 (x2)
222230 +13  911  CQ SP4TXI KO03
222245  -9  912  SP4TXI R4FDK LO23
222300 +11  911  R4FDK SP4TXI -01
222315  -8  912  SP4TXI R4FDK R+01
222330 +11  911  R4FDK SP4TXI RR73
222345 -11  912  SP4TXI R4FDK 73
40m 
UTC    dB Audio  Message
111015  +1 1303  HB10GBT SP4TXI KO03 (x2)
111145  -4 1238  9A9TT SP4TXI KO03
111200  -7 1238  SP4TXI 9A9TT +00
111215  +3 1239  9A9TT SP4TXI R+04
111230  -4 1238  SP4TXI 9A9TT RR73
111245  -3 1239  9A9TT SP4TXI 73
111315  +9  701  DM8MH SP4TXI KO03
185330 -19  719  EY7BM SP4TXI KO03 (x3)
185530 -12  720  Z62NS SP4TXI KO03 (x3)
185745 -23 1772  SP4TXI RZ4FWA LO23
10m 
UTC    dB Audio  Message
144300 -11 2522  SP4TXI F4ILK R+06 (x2)
081145  -7 1255  SP4TXI RA9ACA +01 (x2)

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.

Explore CW reception at SO8OO

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