W1SBW — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: United States Most frequent locator attributed to this token: FN33

Receiver-side FT8 activity involving W1SBW, decoded by SO8OO in southeastern Poland. 33 FT8 messages attributed to this token as transmitter, on 40m, 20m, across 6 UTC dates in the available aggregate history. Observed between 2026-06-10 and 2026-09-20.

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 33 FT8 messages attributed to W1SBW as the transmitting token by decoded message structure across 6 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (97%), followed by 40 m (3%). Several six-hour UTC windows tied for the largest share (100%), so no unique busiest interval is claimed. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -16 dB.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-16 dB

Estimated median S/N

Bands

40m · 1 20m · 32

First attributed message: 2026-06-10
Last attributed message: 2026-09-20 00:48 UTC

Observed FT8 message patterns

Attributed sample: 33 messages
Active dates: 6 UTC dates
Estimated median S/N: -16 dB
Estimated 10th-90th percentile: -21 to -11 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 19, moderate (-15 to -9 dB) 12, strong (≥ -8 dB) 2.

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 W1SBW in decoded directed-looking exchanges:

DH2RL · Fed. Rep. of Germany G3ROY · England SV5BYP · Dodecanese VC3F · Canada G4SRT · England HB9TIH · Switzerland DL1LCK · Fed. Rep. of Germany EA2ASB · Spain EC5M · Spain G0AZH · England GM4KHE · Scotland HA7TM · Hungary

Most frequent locator attributed to W1SBW

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: FN33 · 26 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 6,761 km (approx.)
Last such locator decoded: 2026-09-20 00:48 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	W1SBW S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-14 00:47	40m	- / -1	AD8FD	-11 / -	2	Partial capture
09-14 00:37	40m	- / -3	HB9TIH	-16 / -	3	✓ Closing fragment
09-14 00:31	40m	- / -13	GM6URC	-9 / -	3	Partial capture
09-14 00:28	40m	- / -	HB9TIH	-12 / -	2	Partial capture
09-14 00:09	40m	- / -4	G4SRT	0 / -	3	✓ Closing fragment
08-14 22:59	20m	- / -3	DH2RL	+3 / -	2	✓ Closing fragment
07-03 01:03	60m	- / -	ER3UA	0 / -	2	Partial capture
07-03 01:02	60m	- / -11	OZ7FOC	-4 / -	2	✓ Closing fragment
07-03 00:57	60m	- / -16	HA7TM	+4 / -	2	✓ Closing fragment
07-03 00:56	60m	- / -10	IW9FRA	-13 / -	14	✓ Closing fragment
07-03 00:54	60m	- / -21	GM4KHE	-6 / -	4	✓ Closing fragment
07-03 00:50	60m	- / -9	DL1LCK	-6 / -	6	✓ Closing fragment
07-03 00:50	60m	- / -	DL9KM	-12 / -	7	Partial capture
07-03 00:50	60m	- / -12	G0AZH	-2 / -	4	✓ Closing fragment
06-26 00:25	20m	- / -5	SV5BYP	-15 / -	4	✓ Closing fragment
06-22 21:25	20m	- / -21	G3ROY	-20 / -	3	✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
001045  +2  640  W1SBW G4SRT RR73
002830  -8 2366  W1SBW HB9TIH JN36 (x2)
003130 -12 1812  W1SBW GM6URC -13 (x2)
003230 -20 2271  W1SBW N1NRL R-01
003230  -6 1812  W1SBW GM6URC -13
003700 -16 2366  W1SBW HB9TIH JN36 (x3)
004300 -20 2010  W1SBW IZ4EFV JN64
004730 -12  777  W1SBW AD8FD -01 (x2)
004930 -12  778  W1SBW RR73; KQ4LTA <...> +06
004845 -16 2287  TN8GD W1SBW FN33

20m

UTC    dB Audio  Message
212545 -22 2020  W1SBW G3ROY -21 (x3)
000645 -23 1740  TN8GD W1SBW FN33
002315 -21 1740  YO6OGW W1SBW R-11
002530 -16 1740  W1SBW SV5BYP KM46 (x4)
012430 -23 1740  VC3F W1SBW 73
013645 -22 1740  A71UN W1SBW FN33
225930  +7  467  W1SBW DH2RL -03 (x2)

60m

UTC    dB Audio  Message
005930 -12 1697  W1SBW IW9FRA R-10 (x4)
010230  -2 1270  W1SBW OZ7FOC -11 (x2)
010330 -13 1696  W1SBW IW9FRA JM68
010330  -1 2135  W1SBW ER3UA KN37
010430 -15 1697  W1SBW IW9FRA JM68
010430  +0 2135  W1SBW ER3UA KN37
010530 -11 1697  W1SBW IW9FRA JM68
010545 -17 1771  W1SBW EC5M RR73
010600 -12 1697  W1SBW IW9FRA JM68 (x3)

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.

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