8B81JT — 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 8B81JT, decoded by SO8OO in southeastern Poland. 36 FT8 messages attributed to this token as transmitter, on 20m, 10m, across 4 UTC dates in the available aggregate history. Observed between 2026-08-10 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 36 FT8 messages attributed to 8B81JT as the transmitting token by decoded message structure across 4 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (94%), followed by 10 m (6%). Several six-hour UTC windows tied for the largest share (92%), so no unique busiest interval is claimed. Most successfully decoded messages attributed to this token fell in SO8OO's weak S/N range (61%); the estimated median was -19 dB.

Overview

36
Messages attributed
4
UTC dates decoded
14
Active 15-min windows
-19 dB
Estimated median S/N

Bands

20m · 34 10m · 2
First attributed message: 2026-08-10
Last attributed message: 2026-08-20 23:01 UTC

Observed FT8 message patterns

Attributed sample
36 messages
Active dates
4 UTC dates
Estimated median S/N
-19 dB
Estimated 10th-90th percentile
-23 to -9 dB
Recurring-pattern threshold
Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 22, moderate (-15 to -9 dB) 13, strong (≥ -8 dB) 1.

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 8B81JT 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 UTCBand8B81JT S/NCounterpartCounterpart S/NMsgsCapture
08-20 19:24 20m - / - <...> -2 / - 2 ✓ Closing fragment
08-20 15:55 20m -21 / - R9FDE/P -2 / - 2 ✓ Closing observed
08-20 15:20 20m -9 / - <...> +4 / - 2 ✓ Closing fragment
08-20 15:17 20m -10 / - <...> -8 / - 3 ✓ Closing fragment
08-20 15:10 20m -8 / - <...> - / - 2 ✓ Closing fragment
08-20 14:26 20m - / - <...> 0 / - 2 ✓ Closing fragment
08-17 17:32 20m - / - <...> -3 / - 2 ✓ Closing fragment
08-17 17:22 20m - / - <...> -10 / - 2 ✓ Closing fragment
08-17 16:16 20m -21 / - <...> -9 / - 7 ✓ Closing fragment
08-16 18:59 20m - / - <...> +2 / - 2 ✓ Closing fragment
08-16 16:24 20m - / - <...> -8 / - 2 ✓ Closing fragment
08-16 16:15 20m - / - EN35UKR -11 / - 5 Partial capture
08-16 16:00 20m - / - <...> -2 / - 2 ✓ Closing fragment
08-16 15:18 20m - / - <...> 0 / - 2 ✓ Closing fragment
08-15 17:41 20m - / - IU1SCB/IN3 0 / - 2 ✓ Closing fragment
08-15 17:38 20m - / - IU1SCB/IN3 +4 / - 2 ✓ Closing fragment
08-15 16:54 40m - / - ON4CHK/P -2 / - 2 ✓ Closing fragment
08-15 16:41 40m - / - <...> -11 / - 3 ✓ Closing fragment
08-15 13:15 20m - / - IW4DV -10 / - 2 Partial capture
08-15 13:14 20m - / - F5OYA/P -2 / - 3 ✓ Closing fragment
08-14 15:30 20m -22 / - <...> -13 / - 2 ✓ Closing fragment
08-14 15:24 20m -21 / - <...> - / - 2 ✓ Closing fragment
08-14 14:04 20m - / - R0SDM/P -2 / - 2 ✓ Closing fragment
08-13 19:07 20m - / - <...> -8 / - 2 ✓ Closing fragment
08-13 18:21 20m - / -10 DL1RI -3 / - 4 Partial capture
08-13 18:00 20m - / - IT9VCE -6 / - 5 Partial capture
08-13 17:58 20m - / - <...> -10 / - 2 ✓ Closing fragment
08-11 16:21 20m - / - <...> 0 / - 2 ✓ Closing fragment
08-10 13:22 10m - / - <...> -6 / - 2 ✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

20m 
UTC    dB Audio  Message
154115  -9 1873  8B81JT CT1END/P 73
154430 -20 1908  CQ 8B81JT
154615 -11 2705  8B81JT R9FDE/P 73
155530 -21 1260  R9FDE/P 8B81JT RR73
155645  -2 1304  8B81JT R9FDE/P 73
190830  +2 1656  8B81JT <...> 73 (x4)
201915 -21 1347  CQ 8B81JT
213000 -17 1353  8B81JT <...> 73
225815 -23 1351  CQ 8B81JT (x2)
230500  -7 1405  8B81JT <...> 73 (x2)
40m 
UTC    dB Audio  Message
164115  -4  852  8B81JT <...> RR73 (x6)
165430  -3 1949  8B81JT ON4CHK/P RR73 (x2)
171500  +2  832  8B81JT <...> RR73
181300 -12 1791  8B81JT EI3KYB/LH RR73
181330 -12 1557  8B81JT RA4CQW/P RR73
225315  +5  919  8B81JT <...> 73 (x4)
10m 
UTC    dB Audio  Message
132430 -11 1195  8B81JT <...> RR73 (x3)
092630 -19 1156  8B81JT TNX 73
054100 -24 1777  8B81JT <...> RR73 (x4)
084330 -13 1506  8B81JT CT1END/P 73
135145 -14  752  8B81JT <...> 73
145045 -23 1840  <8B81JT> ON5RZ JO21
145045 -10  990  8B81JT <...> RR73 (x4)

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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