W5ZJ — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: United States Most frequent locator attributed to this token: EM45

Receiver-side FT8 activity involving W5ZJ, decoded by SO8OO in southeastern Poland. 11 FT8 messages attributed to this token as transmitter, on 80m, 20m, across 5 UTC dates in the available aggregate history. Observed between 2026-06-18 and 2026-09-05.

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 11 FT8 messages attributed to W5ZJ 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 (64%), followed by 80 m (36%). In this small sample, the estimated median decoder S/N was -8 dB; no usual signal pattern is inferred.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-8 dB

Estimated median S/N

Bands

80m · 4 20m · 7

First attributed message: 2026-06-18
Last attributed message: 2026-09-05 00:42 UTC

Observed FT8 message patterns

Attributed sample: 11 messages
Active dates: 5 UTC dates
Estimated median S/N: -8 dB
S/N percentile sample: Too small
Recurring-pattern threshold: Not met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 3, moderate (-15 to -9 dB) 2, strong (≥ -8 dB) 6.

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 W5ZJ in decoded directed-looking exchanges:

E77FN · Bosnia-Herzegovina EW4DX · Belarus IK4LZH · Italy OK1KM · Czech Republic PB2A · Netherlands R9FAI · European Russia SV5BYP · Dodecanese EA5PS · Spain EI2IXB · Ireland F5OHW · France F6DZU · France G5TV · England

Most frequent locator attributed to W5ZJ

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: EM45 · 7 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 8,454 km (approx.)
Last such locator decoded: 2026-09-05 00:42 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	W5ZJ S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-16 01:58	80m	- / -14	EC3A	-6 / -	2	Partial capture
09-16 01:58	80m	- / -	SM7OYP	+2 / -	3	Partial capture
09-14 02:01	40m	- / -	HB9TIH	-15 / -	2	Partial capture
09-14 01:58	40m	- / -18	EI2IXB	0 / -	2	✓ Closing fragment
09-09 05:30	40m	- / -17	EA5PS	-17 / -	4	✓ Closing fragment
09-09 05:24	40m	- / -	DL1YCL	-3 / -	3	Partial capture
09-09 05:24	40m	- / -13	F6DZU	+4 / -	3	✓ Closing fragment
09-09 05:21	40m	- / -16	DL3OCF	+2 / -	2	Partial capture
09-09 05:21	40m	- / -	G4ZAM	-13 / -	2	Partial capture
09-09 05:21	40m	- / -	HB9TIH	-9 / -	5	Partial capture
09-08 04:44	40m	- / -11	SV8LMQ	+2 / -	2	Partial capture
09-08 04:37	40m	- / -	IK2VFW	-23 / -	2	Partial capture
09-07 07:46	40m	- / -	OT8T	-13 / -	3	Partial capture
09-07 00:54	40m	- / -	MI7XHT	-10 / -	2	Partial capture
09-05 23:43	40m	- / -23	IN3LHF	+4 / -	3	Partial capture
09-05 04:31	40m	- / -	IK3SCB	0 / -	2	Partial capture
09-01 06:00	40m	- / -	G5TV	-12 / -	2	✓ Closing fragment
09-01 05:20	40m	- / -	M0PNN	-12 / -	3	Partial capture
09-01 05:12	40m	- / -	G5TV	-20 / -	2	Partial capture
08-23 04:20	40m	- / -8	DL3OCF	+8 / -	3	Partial capture
08-23 04:20	40m	- / -	IK4LZH	+4 / -	4	Partial capture
08-23 04:01	40m	- / -10	I1RJP	-4 / -	3	✓ Closing fragment
08-19 01:25	40m	- / -	I1RJP	-1 / -	3	Partial capture
08-19 01:24	40m	- / +6	V26K	-4 / -	2	✓ Closing fragment
08-19 01:19	40m	- / -	I1RJP	+2 / -	3	Partial capture
08-18 04:32	80m	- / -	G4ZFJ	+1 / -	6	Partial capture
08-18 04:30	80m	- / -7	F4GWG	-6 / -	3	✓ Closing fragment
08-18 04:16	80m	- / -	F5NLY	-7 / -	3	Partial capture
08-18 04:15	80m	- / -	OK1XV	+4 / -	5	Partial capture
08-18 01:57	80m	- / -	F4FPR	-4 / -	5	Partial capture
08-18 01:55	80m	- / -11	HB9CXZ	+3 / -	2	✓ Closing fragment
08-15 03:48	20m	- / -18	RK9S	+1 / -	5	Partial capture
08-15 03:43	20m	- / -17	RK9S	0 / -	3	Partial capture
08-11 01:01	80m	- / -8	MI7XHT	-19 / -	2	Partial capture
08-09 02:20	80m	- / -12	CR7BRV	0 / -	2	✓ Closing fragment
08-09 01:47	80m	- / -16	LZ2KTS	-1 / -	4	Partial capture
08-07 03:50	80m	- / -	LA9GX	+5 / -	9	Partial capture
07-19 02:06	80m	-8 / -17	DG1KPC	+14 / -17	3	✓ Full exchange observed
07-19 01:03	80m	- / -15	TN8GD	-24 / -	2	✓ Closing fragment
07-14 02:22	80m	- / -17	OM1II	+3 / -	6	✓ Closing fragment
07-14 02:20	80m	- / -18	SP6JIU	+20 / -	2	✓ Closing fragment
06-29 06:53	20m	- / -	F5GPE	+1 / -	3	Partial capture
06-29 06:52	20m	- / -	LZ5EO	+2 / -	2	Partial capture
06-29 06:51	20m	- / -	DL1UDO	-18 / -	3	Partial capture
06-29 06:50	20m	- / -5	EW4DX	+4 / -	4	Partial capture
06-29 06:47	20m	- / -	IK4LZH	-8 / -	2	✓ Closing fragment
06-29 06:41	20m	- / -	PB2A	-18 / -	2	Partial capture
06-29 06:40	20m	- / -14	DG1KPC	-3 / -	3	Partial capture
06-29 06:34	20m	- / -14	R9FAI	-8 / -	3	✓ Closing fragment
06-29 06:26	20m	- / -23	E77FN	-6 / -	4	✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

160m

UTC    dB Audio  Message
015300 -13 1497  W5ZJ G8MIA IO92

80m

UTC    dB Audio  Message
043100  -7 1366  W5ZJ F4GWG -07 (x2)
043230  +0  508  W5ZJ G4ZFJ JO01 (x4)
043515  -2 1207  W5ZJ ON8DM R-06
043545  +2  508  W5ZJ G4ZFJ JO01 (x2)
004230 -17 2730  TF3VS W5ZJ EM45
015830  +2 2520  W5ZJ SM7OYP JO66
015845  -4 1663  W5ZJ EC3A -14 (x2)
015930  +6 2520  W5ZJ SM7OYP JO66 (x2)

40m

UTC    dB Audio  Message
052400  -2 1142  W5ZJ DL1YCL JO31
052430 -13 1810  W5ZJ HB9TIH JN36
052430  -3 1142  W5ZJ DL1YCL JO31
052500  +1  482  W5ZJ F6DZU R-13
052500  -4 1142  W5ZJ DL1YCL JO31
052530  +5  482  W5ZJ F6DZU 73
053000 -15 2129  W5ZJ EA5PS IM99 (x4)
022615 -11 2629  W5ZJ VP5/K5UR -07
015845  -2  237  W5ZJ EI2IXB -18 (x2)
020145 -14 2366  W5ZJ HB9TIH JN36 (x2)

20m

UTC    dB Audio  Message
065415  +0  619  W5ZJ F5GPE JN25 (x2)
070115 -13  563  W5ZJ EW4DX 73
070415  -9 1243  W5ZJ R9CX -16
074230  -9  980  W5ZJ R5AK KO85
074300 -11 1015  W5ZJ DK4FH -13
045945 -10 1871  W5ZJ UR4QWW KN77
034330  +1  725  W5ZJ RK9S -17 (x8)

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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