8A81BL — 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 8A81BL, decoded by SO8OO in southeastern Poland. 59 FT8 messages attributed to this token as transmitter, on 20m, across 5 UTC dates in the available aggregate history. Observed between 2026-08-14 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 59 FT8 messages attributed to 8A81BL as the transmitting token by decoded message structure across 5 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (100%). Several six-hour UTC windows tied for the largest share (100%), so no unique busiest interval is claimed. Most successfully decoded messages attributed to this token fell in SO8OO's weak S/N range (71%); the estimated median was -17 dB.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-17 dB

Estimated median S/N

Bands

20m · 59

First attributed message: 2026-08-14
Last attributed message: 2026-08-20 16:42 UTC

Observed FT8 message patterns

Attributed sample: 59 messages
Active dates: 5 UTC dates
Estimated median S/N: -17 dB
Estimated 10th-90th percentile: -24 to -12 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 42, moderate (-15 to -9 dB) 16, 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 8A81BL in decoded directed-looking exchanges:

OZ/KD0NDU · Denmark DJ6OI/P · Fed. Rep. of Germany DL1CBS/P · Fed. Rep. of Germany EI0NDR/LH · Ireland F4JYI/P · France OY5T · Faroe Islands OZ/DO2TSG · Denmark R0SDM/P · Asiatic Russia R2UZ/P · European Russia R9FDE/P · European Russia

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 UTC	Band	8A81BL S/N	Counterpart	Counterpart S/N	Msgs	Capture
08-17 16:40	20m	-24 / -	<...>	-8 / -	2	✓ Closing fragment
08-17 15:46	20m	-22 / -	<...>	-17 / -	2	✓ Closing fragment
08-14 15:50	20m	- / -7	IK1JUS	-8 / -	2	Partial capture
08-14 15:50	20m	-24 / -	R2UZ/P	-15 / -	2	✓ Closing observed
08-14 14:12	20m	- / -	IZ2QDC	-9 / -	5	Partial capture
08-11 18:19	20m	- / -12	9A5WA	+10 / -	2	Partial capture
08-11 17:48	20m	- / -	<...>	-10 / -	2	✓ Closing fragment
08-11 17:48	20m	- / -12	UA4AGU	-6 / -	5	Partial capture
08-11 17:09	20m	- / -	<...>	-16 / -	2	✓ Closing fragment
08-11 17:06	20m	- / -	R2HH	-14 / -	3	Partial capture
08-11 16:53	20m	- / -	DG8NFB	-7 / -	3	Partial capture
08-11 16:53	20m	- / -5	PE9JAN	-8 / -	2	Partial capture
08-11 16:14	20m	- / -	<...>	-8 / -	2	✓ Closing fragment
08-11 14:56	20m	- / -	<...>	-15 / -	2	✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
155930 +11 2736  8A81BL <...> 73 (x3)

20m

UTC    dB Audio  Message
152630 -18 1464  CQ 8A81BL (x4)
160615  +0 1146  8A81BL F4JYI/P 73
161000 -24 1460  CQ 8A81BL (x10)

10m

UTC    dB Audio  Message
095300 -13 2132  8A81BL <...> 73 (x6)
160230 -21 1719  8A81BL OZ/KD0NDU RR73

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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