A41CK — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Oman Most frequent locator attributed to this token: LL93

Receiver-side FT8 activity involving A41CK, decoded by SO8OO in southeastern Poland. 18 FT8 messages attributed to this token as transmitter, on 80m, 20m, across 2 UTC dates in the available aggregate history. Observed between 2026-06-26 and 2026-08-30.

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 18 FT8 messages attributed to A41CK as the transmitting token by decoded message structure across 2 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (94%), followed by 80 m (6%). In this small sample, the estimated median decoder S/N was -1 dB; no usual signal pattern is inferred.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-1 dB

Estimated median S/N

Bands

80m · 1 20m · 17

First attributed message: 2026-06-26
Last attributed message: 2026-08-30 18:56 UTC

Observed FT8 message patterns

Attributed sample: 18 messages
Active dates: 2 UTC dates
Estimated median S/N: -1 dB
S/N percentile sample: Too small
Recurring-pattern threshold: Not met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 1, moderate (-15 to -9 dB) 0, strong (≥ -8 dB) 17.

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 A41CK in decoded directed-looking exchanges:

F4EZJ · France IS0IYV · Sardinia R6FFB · European Russia RA4FHO · European Russia SP5CJY · Poland SQ9OB · Poland UA4FKT · European Russia YO5PSE · Romania

Most frequent locator attributed to A41CK

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: LL93 · 14 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 4,356 km (approx.)
Last such locator decoded: 2026-06-26 17:12 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 UTC	Band	A41CK S/N	Counterpart	Counterpart S/N	Msgs	Capture
08-30 18:56	80m	- / -17	LA0FA	+8 / -	5	Partial capture
08-30 18:56	80m	- / -	M0RLC	+3 / -	7	Partial capture
08-30 18:56	80m	- / -13	RA4FHO	+8 / -	2	✓ Closing fragment
08-30 18:55	80m	- / -16	IS0IYV	-7 / -	5	✓ Closing fragment
08-30 18:55	80m	-23 / -	F4EZJ	+2 / -	3	✓ Closing observed
08-30 18:53	80m	- / -	SP3IOE	-2 / -	2	Partial capture
08-30 18:51	80m	- / -12	R6FFB	+5 / -	3	✓ Closing fragment
08-30 18:51	80m	- / -19	SP5CJY	+11 / -	6	✓ Closing fragment
08-30 18:49	80m	- / -	ON4ASG	-1 / -	2	Partial capture
08-30 18:47	80m	- / -20	UA4FKT	+1 / -	4	✓ Closing fragment
08-30 18:45	80m	- / -15	YO5PSE	-3 / -	3	✓ Closing fragment
08-30 18:44	80m	- / -	ON4ASG	0 / -	2	Partial capture
08-30 18:43	80m	- / -	SQ9OB	+17 / -	3	✓ Closing fragment
06-26 17:14	20m	- / -	EA3DBZ	-6 / -	2	Partial capture
06-26 17:09	20m	- / -	SQ7OBH	-4 / -	2	Partial capture
06-26 17:05	20m	0 / -	<...>	- / -	2	Partial capture
06-26 17:02	20m	- / -	R4CKL	-18 / -	2	Partial capture
06-26 16:59	20m	- / -	OK1JAZ	-8 / -	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
185645 +12 2948  A41CK RA4FHO RR73
185645  +2  688  A41CK M0RLC JO02
185645  -8 1339  A41CK IS0IYV JN40
185715  +1  687  A41CK M0RLC JO02
185715  +8 1788  A41CK LA0FA JO59
185715  -4 1872  A41CK IS0IYV JN40
185745  +3  687  A41CK M0RLC JO02
185745 +12 1788  A41CK LA0FA JO59
185745  -6 1872  A41CK IS0IYV R-16
185815  +6  687  A41CK M0RLC JO02
185815 +11 1789  A41CK LA0FA JO59
185815  -4 1872  A41CK IS0IYV 73
185845  +5  688  A41CK M0RLC JO02
185845  +7 1789  A41CK LA0FA R-17
185915  +7  688  A41CK M0RLC JO02

20m

UTC    dB Audio  Message
170545  -1  570  <...> A41CK (x2)
170645  +2  570  CQ A41CK LL93 (x4)
170830  +0  570  <...> A41CK R+00
170900  -5  885  A41CK SQ7OBH JO91 (x2)
171100  +0  570  CQ A41CK LL93 (x2)
171245  -9  409  A41CK IK4LZH JN54
171415  -9  570  A41CK IQ6SB JN62
171445  -7  570  A41CK EA3DBZ JN12 (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.

FT8DB and SO8OO WebSDR are a hobby project maintained solo. ☕ Buy me a coffee