8C81KS — 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: Indonesia

Receiver-side FT8 activity involving 8C81KS, decoded by SO8OO in southeastern Poland. 170 FT8 messages attributed to this token as transmitter, on 80m, 60m, 20m, 10m, across 7 UTC dates in the available aggregate history. Observed between 2026-08-13 and 2026-08-20.

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 170 FT8 messages attributed to 8C81KS as the transmitting token by decoded message structure across 7 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (81%), followed by 60 m (11%) and 80 m (6%). Most decodes (68%) fell within the six-hour window 14:00-20:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -13 dB.

Overview

170
Messages attributed
7
UTC dates decoded
37
Active 15-min windows
-13 dB
Estimated median S/N

Bands

80m · 11 60m · 19 20m · 138 10m · 2
First attributed message: 2026-08-13
Last attributed message: 2026-08-20 23:29 UTC

Observed FT8 message patterns

Attributed sample
170 messages
Active dates
7 UTC dates
Estimated median S/N
-13 dB
Estimated 10th-90th percentile
-21 to -3 dB
Recurring-pattern threshold
Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 64, moderate (-15 to -9 dB) 53, strong (≥ -8 dB) 53.

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 8C81KS 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.

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 UTCBand8C81KS S/NCounterpartCounterpart S/NMsgsCapture
08-20 23:24 20m -16 / - <...> - / - 2 Partial capture
08-20 23:12 20m -8 / - LB8DE/M -4 / - 3 ✓ Closing observed
08-20 23:11 20m -6 / - <...> - / - 2 ✓ Closing fragment
08-20 23:05 20m -8 / - <...> - / - 4 ✓ Closing fragment
08-20 23:04 20m -13 / - II7MGFG - / - 2 Partial capture
08-20 23:00 20m -11 / - <...> +5 / - 4 ✓ Closing fragment
08-20 22:56 20m -10 / - <...> +5 / - 3 ✓ Closing fragment
08-20 22:55 20m -7 / - LB8DE/M - / - 2 Partial capture
08-20 22:47 20m - / - <...> -4 / - 3 ✓ Closing fragment
08-20 22:35 40m - / -14 YO6LM -4 / - 2 Partial capture
08-20 22:29 40m - / - <...> +2 / - 2 ✓ Closing fragment
08-20 17:06 20m -10 / - PA3FRX -12 / -14 3 Partial capture
08-20 17:05 20m -8 / - <...> -4 / - 4 ✓ Closing fragment
08-20 17:01 10m - / - <...> -9 / - 2 ✓ Closing fragment
08-20 16:49 20m - / - OE9DAI -7 / - 2 Partial capture
08-20 16:49 20m -14 / - <...> +8 / - 2 ✓ Closing fragment
08-20 16:19 10m -23 / - <...> -17 / - 2 ✓ Closing fragment
08-20 16:08 10m -22 / - <...> -15 / - 4 ✓ Closing fragment
08-20 16:05 20m -6 / - <...> +11 / - 2 ✓ Closing fragment
08-20 15:55 20m +1 / - <...> -9 / - 7 ✓ Closing fragment
08-20 15:49 20m -2 / - <...> -9 / - 6 ✓ Closing fragment
08-20 15:43 10m - / - DL1AAH -8 / - 3 Partial capture
08-20 15:35 10m - / - DL1AAH -6 / - 7 Partial capture
08-20 15:33 10m - / - DO1ANB -17 / - 5 Partial capture
08-20 15:15 20m -6 / - <...> - / - 5 ✓ Closing fragment
08-20 15:10 20m -5 / - CT1END/P +16 / - 2 ✓ Closing observed
08-20 14:55 20m -8 / - <...> +1 / - 13 ✓ Closing fragment
08-20 13:47 20m -7 / - <...> - / - 3 Partial capture
08-19 23:15 20m -14 / - <...> -10 / - 3 ✓ Closing fragment
08-19 23:04 20m -8 / - ZA5G -12 / - 2 ✓ Closing observed
08-19 23:00 20m -4 / - <...> - / - 3 ✓ Closing fragment
08-19 22:55 20m -1 / - <...> -14 / - 2 ✓ Closing fragment
08-19 22:47 20m - / - KC2SWC -20 / - 3 Partial capture
08-19 22:41 20m -6 / - <...> - / - 7 ✓ Closing fragment
08-19 17:47 60m - / - DL80NRW -2 / - 2 Partial capture
08-19 17:28 60m - / - SP2TQI 0 / - 4 Partial capture
08-19 17:28 60m - / -9 SV2HTI +2 / - 2 Partial capture
08-19 17:22 60m - / - <...> -4 / - 6 ✓ Closing fragment
08-19 17:22 60m - / - DL6TK -6 / - 5 Partial capture
08-19 17:19 60m - / - <...> 0 / - 2 ✓ Closing fragment
08-19 17:19 60m - / - DB5AE -16 / - 2 Partial capture
08-19 17:19 60m - / -2 DL6ZXG +5 / - 2 Partial capture
08-19 17:19 60m - / - SV1QEW -12 / - 10 Partial capture
08-19 17:19 60m - / - YO8AAZ -3 / - 27 Partial capture
08-19 17:01 20m - / - EA1EMI -10 / - 3 Partial capture
08-19 13:58 20m - / - <...> -8 / - 2 ✓ Closing fragment
08-18 19:38 60m - / - HA7XL +9 / - 3 Partial capture
08-18 19:36 60m - / - <...> -6 / - 4 ✓ Closing fragment
08-18 19:30 60m - / - IK1YFE -20 / - 3 Partial capture
08-18 19:26 60m - / - F8FTY -16 / - 2 Partial capture

Recent FT8 messages decoded at SO8OO

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

20m 
UTC    dB Audio  Message
230715  -9  867  <...> 8C81KS 73 (x4)
231230  -7  677  LB8DE/M 8C81KS
231315  -4  675  8C81KS LB8DE/M RR73
231330 -10  677  LB8DE/M 8C81KS 73
231545 -12  964  W7/UR5YH 8C81KS
231830 -12  732  CQ 8C81KS (x3)
232315 -13 1128  <KD9ZHF> 8C81KS
232445 -13  964  <...> 8C81KS (x3)
40m 
UTC    dB Audio  Message
192230  +2  680  8C81KS <...> 73 (x3)
164730  -4 1139  8C81KS SQ5WBW/P RR73
171600  -2 1496  8C81KS <...> 73
173030  -1 1552  8C81KS UA3MRS/QRP 73
222930 -11 1137  <8C81KS> DL7JLC JO62
222930  +5 1551  <8C81KS> DK9MLA JO40
222930  +3 1905  <8C81KS> DK7ZT -19
222930  -4 1377  8C81KS <...> 73
223030  -9 1600  <8C81KS> F5PBG IN78
223030  +8 1684  8C81KS <...> 73
223500  -1 2866  <8C81KS> YO6LM -14
223500  +3 1263  8C81KS <...> 73
223530  -7 2866  8C81KS YO6LM -14
10m 
UTC    dB Audio  Message
154345 -11  439  8C81KS DL1AAH (x3)
155745  -9 1877  8C81KS <...> 73 (x4)
161100 -22 1586  <...> 8C81KS RR73
161115 -24 1585  8C81KS <...> 73 (x3)
162130 -23 1584  <...> 8C81KS RR73
163145  -9 1872  8C81KS <...> 73 (x3)
80m 
UTC    dB Audio  Message
180445  -1 1690  <8C81KS> DO1ARD JN49
180445  -5 1597  8C81KS <...> RR73
180515  +0  808  8C81KS DO5HOK JO41
180515  +3 1690  8C81KS DO1ARD JN49
180615  +0 2896  <8C81KS> G6CUT IO90
180615  +0 2408  <8C81KS> DK4SDR JN49
180615  +1 2243  8C81KS <...> 73
180645  -4 2897  8C81KS G6CUT IO90 (x2)
180715 -17 1803  8C81KS <...> 73
180745 -17 1703  8C81KS G6CUT IO90 (x3)
181030 -24 1597  CQ 8C81KS
194115 +14  746  8C81KS <...> 73
60m 
UTC    dB Audio  Message
172945  -5 1617  8C81KS YO8AAZ KN36
172945  +1 1037  8C81KS SP2TQI JO94
173015  -6 1616  8C81KS YO8AAZ KN36 (x3)
173115  -6 1444  8C81KS <...> 73
173145  -2 1617  8C81KS YO8AAZ KN36 (x4)
173945  +5 1342  8C81KS <...> 73
174745  -4 2243  <8C81KS> DL80NRW
174745  +4 1331  8C81KS <...> 73
174815  +0 2243  8C81KS DL80NRW
192515  -5 1039  8C81KS <...> 73

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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