WA3SWJ — 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: United States Most frequent locator attributed to this token: FN41

Receiver-side FT8 activity involving WA3SWJ, decoded by SO8OO in southeastern Poland. 166 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, across 6 UTC dates in the available aggregate history. Observed between 2026-06-18 and 2026-10-16.

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 166 FT8 messages attributed to WA3SWJ as the transmitting token by decoded message structure across 6 UTC dates in the available aggregate history. The largest monitored-band total was 80 m (55%), followed by 20 m (31%) and 40 m (14%). Most decodes (90%) fell within the six-hour window 21:00-03:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -13 dB.

Overview

166

Messages attributed

UTC dates decoded

Active 15-min windows

-13 dB

Estimated median S/N

Bands

80m · 91 40m · 23 20m · 52

First attributed message: 2026-06-18
Last attributed message: 2026-10-16 01:51 UTC

Observed FT8 message patterns

Attributed sample: 166 messages
Active dates: 6 UTC dates
Estimated median S/N: -13 dB
Estimated 10th-90th percentile: -21 to -1 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 57, moderate (-15 to -9 dB) 74, strong (≥ -8 dB) 35.

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 WA3SWJ in decoded directed-looking exchanges:

EC3A · Spain ×2 IQ4JO · Italy ×2 4L7T · Georgia DM5WGL · Fed. Rep. of Germany EA5IHI · Spain F5HND · France F6BTP · France G0ULG · England G3RPF · England IU2LVV · Italy IZ1HJU · Italy M0ITJ · England

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.

Most frequent locator attributed to WA3SWJ

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: FN41 · 69 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 6,791 km (approx.)
Last such locator decoded: 2026-09-23 02:50 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	WA3SWJ S/N	Counterpart	Counterpart S/N	Msgs	Capture
11-01 01:54	40m	- / -	F4LSG	-8 / -	2	Partial capture
10-16 01:54	40m	- / +6	CT7AUT	-16 / -	2	Partial capture
10-16 01:38	40m	- / -10	IZ8PPI	-22 / -	2	Partial capture
10-16 01:36	40m	- / -11	IZ8EYN	-6 / -	2	✓ Closing fragment
09-28 21:23	40m	- / -15	IU4SQE	-18 / -	3	Partial capture
09-23 02:51	80m	- / -20	HF100PKP	+4 / -	2	Partial capture
09-23 02:50	80m	-14 / -	SP5UAF/P	- / -13	3	Partial capture
09-23 02:48	80m	- / -13	RT2O	-6 / -	2	Partial capture
09-23 02:47	80m	-10 / -	KB9TMT	- / -10	3	Partial capture
09-23 02:46	80m	- / -	EU7FBB	-3 / -	3	Partial capture
09-23 02:46	80m	- / -	RX6DA	-2 / -	8	Partial capture
09-23 02:46	80m	- / -18	YO8RAW	+9 / -	3	Partial capture
09-23 02:38	80m	- / -14	OK1UOZ	+5 / -	5	✓ Closing fragment
09-23 02:38	80m	- / -	RO2X	-4 / -	2	Partial capture
09-23 02:36	80m	-14 / -21	IQ4JO	+2 / -	4	✓ Closing observed
09-23 02:36	80m	- / -	OH3DJP	-10 / -	4	Partial capture
09-23 02:35	80m	- / -14	DO3BOX	-5 / -	2	Partial capture
09-23 02:31	80m	-11 / -	KU4UK	- / -6	2	✓ Closing fragment
09-23 02:30	80m	-10 / -	DO5PY	-11 / -17	3	✓ Closing observed
09-23 02:30	80m	- / -	EU7FBB	0 / -	2	Partial capture
09-23 02:29	80m	- / -	DC4THF	0 / -	2	Partial capture
09-23 02:28	80m	-14 / -	KG4JOK	-24 / 0	3	✓ Closing observed
09-23 02:26	80m	- / -14	SQ6ELK	+4 / -	2	✓ Closing fragment
09-23 02:21	80m	-12 / -	KA5WZZ	- / -12	2	Partial capture
09-23 02:21	80m	- / -20	EU7FBB	+1 / -	8	Partial capture
09-23 02:20	80m	-8 / -17	OZ1KEF	+8 / -12	5	✓ Full exchange observed
09-23 02:18	80m	-12 / -	N0SD	- / -11	2	✓ Closing fragment
09-23 02:16	80m	-12 / -25	LZ1ST	+13 / -6	6	✓ Full exchange observed
09-23 02:15	80m	-12 / -	KM7DAV	- / -9	2	✓ Closing fragment
09-23 02:12	80m	-15 / -	9A4ZM	+2 / -14	5	Partial capture
09-23 02:12	80m	- / -	UW5KW	+14 / -	4	Partial capture
09-23 02:11	80m	- / -	DG7NFX	-4 / -	3	Partial capture
09-23 02:11	80m	- / -	EU7FBB	0 / -	3	Partial capture
09-23 02:10	80m	-12 / -	KD2ZZA	- / +7	2	✓ Closing fragment
09-23 02:08	80m	-12 / -	SN40KZE	- / -13	2	Partial capture
09-23 02:05	80m	- / -	UW5KW	+10 / -	3	Partial capture
09-23 02:03	80m	-13 / -	SQ8T	+7 / -12	10	Partial capture
09-23 02:03	80m	- / -3	ON1JP	-18 / -	2	Partial capture
09-23 02:02	80m	-10 / -15	LA3DV	-7 / -16	4	✓ Full exchange observed
09-23 02:01	80m	-8 / -19	US7KC	+13 / -11	5	✓ Full exchange observed
09-23 02:00	80m	- / -	EU7FBB	-8 / -	3	Partial capture
09-23 01:58	80m	-14 / -	WB9TNF	- / -10	3	Partial capture
09-23 01:57	80m	- / -18	SP9WLC	+14 / -	2	Partial capture
09-23 01:56	80m	- / -	EU7FBB	-1 / -	5	Partial capture
09-23 01:54	80m	-7 / -9	F1PBZ	0 / -9	3	✓ Full exchange observed
09-23 01:45	40m	-14 / -	JY5IB	-22 / -16	3	✓ Closing observed
09-21 02:37	80m	-18 / -8	PE1MHY	-8 / -18	4	✓ Full exchange observed
09-21 02:35	80m	- / -	LB0TH	-8 / -	5	Partial capture
09-21 02:30	80m	- / -6	PE1MHY	-6 / -	2	Partial capture
09-21 02:28	80m	- / -	EA3DBZ	-22 / -	2	Partial capture

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
013615  -4  671  WA3SWJ IZ8EYN -11 (x2)
013815 -21 1531  WA3SWJ IZ8PPI -10 (x2)
015130 -24 1698  E75C WA3SWJ R-15
015445 -15 1465  WA3SWJ CT7AUT +06 (x2)
020115 -24 1531  WA3SWJ IZ8PPI -09
021215 -13 1847  WA3SWJ TA2VUZ RR73
021615 -11 1910  WA3SWJ ON1JP -07
022645 -24 1387  WA3SWJ 4X5CG KM71
015415  -7  271  WA3SWJ F4LSG IN87 (x3)
020215 -15  876  WA3SWJ EA4HTI R-08

80m

UTC    dB Audio  Message
024815  -9 1103  KB9TMT WA3SWJ -10
024830  +0 1743  WA3SWJ RX6DA KN85
024830  -7 2383  WA3SWJ RT2O -13
024845  -9 1103  KB9TMT WA3SWJ -10
024900  -1 1743  WA3SWJ RX6DA KN85
024900  -4 2383  WA3SWJ RT2O -13
024915  -4 1103  CQ WA3SWJ FN41
024930  +4 1743  WA3SWJ RX6DA KN85 (x2)
025015 -15 1102  SP5UAF/P WA3SWJ FN41 (x2)
025100  -2 1399  WA3SWJ HF100PKP -20
025115 -12 1103  SP5UAF/P WA3SWJ R-13
025130 +10 1399  WA3SWJ HF100PKP -20
025300 -24 1103  WA3SWJ F6FHZ JN18

20m

UTC    dB Audio  Message
224315  -1 2838  G3RPF WA3SWJ RR73
224345  +1 2838  CQ WA3SWJ FN41
224415  +3 2838  TA3F WA3SWJ -16 (x2)
224500  -2  816  WA3SWJ LZ2EW KN13
224515  +3 2838  TA3F WA3SWJ -16 (x2)
224615  +2 2838  PD2V WA3SWJ -07 (x2)
224715  +5 2838  CQ WA3SWJ FN41 (x2)
150300  -7 1104  WA3SWJ DF1WR JN39
152800 -16 1422  WA3SWJ PD4RJ JO33 (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.

CW

No CW receptions recorded for this callsign in the last 30 days.

Explore CW reception at SO8OO

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