W4MJH — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: United States Most frequent locator attributed to this token: EM63

Receiver-side FT8 activity involving W4MJH, decoded by SO8OO in southeastern Poland. 149 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, across 11 UTC dates in the available aggregate history. Observed between 2026-06-06 and 2026-08-28.

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 149 FT8 messages attributed to W4MJH as the transmitting token by decoded message structure across 11 UTC dates in the available aggregate history. The largest monitored-band total was 80 m (48%), followed by 20 m (48%) and 40 m (5%). Most decodes (98%) fell within the six-hour window 23:00-05:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -14 dB.

Overview

149

Messages attributed

UTC dates decoded

Active 15-min windows

-14 dB

Estimated median S/N

Bands

80m · 71 40m · 7 20m · 71

First attributed message: 2026-06-06
Last attributed message: 2026-08-28 04:02 UTC

Observed FT8 message patterns

Attributed sample: 149 messages
Active dates: 11 UTC dates
Estimated median S/N: -14 dB
Estimated 10th-90th percentile: -24 to -6 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 59, moderate (-15 to -9 dB) 69, strong (≥ -8 dB) 21.

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 W4MJH in decoded directed-looking exchanges:

PI4DX · Netherlands ×2 HB9EFK · Switzerland PA3T · Netherlands WA2HIP · United States 9A5E · Croatia AA4FX · United States AC8RJ · United States F4DIA · France F5RRS · France HB9CXZ · Switzerland HI8RMQ · Dominican Republic IW0FFK · Italy

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 W4MJH

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: EM63 · 68 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 8,401 km (approx.)
Last such locator decoded: 2026-08-28 02:59 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	W4MJH S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-06 05:51	40m	- / -	G0OYQ	-9 / -	3	Partial capture
09-06 05:51	40m	- / -13	PA3T	+8 / -	3	✓ Closing fragment
09-06 05:50	40m	- / -15	F1PBZ	-7 / -	4	Partial capture
08-28 04:02	40m	0 / -	WA2HIP	-15 / -3	2	✓ Closing observed
08-28 02:57	40m	-13 / -	RI1FJL	- / -	6	Partial capture
08-28 02:51	40m	- / -13	R7FG	-9 / -	2	Partial capture
08-28 02:48	40m	- / -17	F1PBZ	-9 / -	3	Partial capture
08-28 02:48	40m	- / -	OH1MRE	+5 / -	3	Partial capture
08-24 21:00	20m	- / -	DK1MCS	-14 / -	2	Partial capture
08-09 03:04	80m	- / -	F5OYA/P	-16 / -	6	Partial capture
08-09 03:00	80m	- / -14	IW0FFK	+5 / -	7	✓ Closing fragment
08-09 02:57	80m	- / -	IK6QRE	0 / -	2	Partial capture
08-09 02:57	80m	- / -	SP1ZMO	-5 / -	2	Partial capture
08-09 02:57	80m	- / -	UR5SG	+8 / -	2	Partial capture
08-09 02:56	80m	- / -	F5OYA/P	-20 / -	2	Partial capture
08-09 02:53	80m	- / -	IK6QRE	+11 / -	2	Partial capture
08-09 02:48	80m	- / -	F5OYA/P	-16 / -	7	Partial capture
08-09 02:42	80m	- / -	SP9UPH	+12 / -	2	Partial capture
08-09 02:42	80m	- / -	SV8JE	+16 / -	2	Partial capture
08-09 02:40	80m	-24 / -	KZ8C	-24 / -	3	✓ Closing observed
08-09 02:36	80m	- / -	DD6WF	0 / -	2	Partial capture
08-09 02:36	80m	- / -	KF9UG	-24 / -	2	Partial capture
08-09 02:35	80m	- / -	SV8JE	+17 / -	4	Partial capture
08-09 02:34	80m	- / -	KZ8C	-20 / -	2	Partial capture
08-09 02:22	80m	- / -6	DH1KJ	+1 / -	4	Partial capture
08-09 02:22	80m	- / -3	F4DIA	-5 / -	4	✓ Closing fragment
08-09 02:21	80m	- / -	DD6WF	+1 / -	2	Partial capture
08-09 02:21	80m	- / -	DK5IR	+1 / -	2	Partial capture
08-09 02:19	80m	-22 / -	VE3LWY	- / +6	2	Partial capture
08-09 02:16	80m	-23 / -	K4JJL	- / -9	2	✓ Closing fragment
08-09 02:16	80m	- / -	US6EX	0 / -	2	Partial capture
08-09 02:14	80m	- / -	9A4ZM	-1 / -	2	Partial capture
08-09 02:14	80m	- / -10	DH1KJ	-8 / -	7	Partial capture
08-09 02:14	80m	- / -	DO5PY	-16 / -	2	Partial capture
08-09 02:13	80m	- / -	IK2DZN	-9 / -	2	Partial capture
07-27 02:28	80m	-12 / -	AA4FX	- / -	2	✓ Closing fragment
07-27 02:26	80m	- / -3	AC8RJ	-16 / -	2	✓ Closing fragment
07-26 19:41	10m	- / -11	F1PBZ	0 / -	4	Partial capture
07-23 02:42	80m	- / -	EA3HMM	-11 / -	4	Partial capture
07-23 02:40	80m	- / -	DO7BE	-10 / -	5	Partial capture
07-23 02:39	80m	-12 / +1	PI4DX	+2 / -	3	✓ Closing observed
07-23 02:38	80m	-16 / -	KF9UG	- / +1	2	✓ Closing fragment
07-23 02:36	80m	- / -	HG8LXL	+9 / -	10	Partial capture
07-23 02:36	80m	-16 / -	K4DV	- / +8	2	✓ Closing fragment
07-23 02:35	80m	-18 / -	WA2SI	-17 / -9	4	✓ Closing observed
07-23 02:34	80m	-24 / -18	F5RRS	+8 / -	3	✓ Closing observed
07-23 02:28	80m	- / -	DK5WL	-4 / -	2	Partial capture
07-23 02:28	80m	- / -	HB9CXZ	+6 / -	4	✓ Closing fragment
07-23 02:28	80m	- / -	HG8LXL	+8 / -	3	Partial capture
07-23 02:27	80m	- / -	EA1AAA	-9 / -	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
040200  +0 2286  WA2HIP W4MJH R-03
040215 -15 2287  W4MJH WA2HIP RR73
054545  -7 1006  W4MJH SP8AJC -17
055015  -9 2641  W4MJH F1PBZ -15 (x3)
055145  +9 2734  W4MJH PA3T JO31
055145 -11 1212  W4MJH PA2RO JO22
055145 -10  448  W4MJH G0OYQ IO93
055145  -5 2641  W4MJH F1PBZ -15
055215  +5 2734  W4MJH PA3T R-13 (x2)
055315  -9  447  W4MJH G0OYQ IO93 (x2)
055415  -4 1212  W4MJH PA2RO JO22

20m

UTC    dB Audio  Message
030145 -13 2425  <...> W4MJH EM63 (x2)
222330 -11 1070  W4MJH GB13COL -05 (x3)
223600  -1 1070  W4MJH <...> -05 (x6)
210000  +0 2448  W4MJH EA1AJT IN72
210000 -10 1322  W4MJH DK1MCS JN57
210100 -18 1959  W4MJH WQ1D FN42
210200 -17 1323  W4MJH DK1MCS JN57

80m

UTC    dB Audio  Message
030045 +12  836  W4MJH IW0FFK JN61
030045 -20 2108  W4MJH F5OYA/P JN13
030115 +11  836  W4MJH IW0FFK JN61 (x6)
030415 -21 2108  W4MJH F5OYA/P JN13 (x6)
031200 -24 2108  N5LL W4MJH -17

10m

UTC    dB Audio  Message
194115  +1 2825  W4MJH F1PBZ -11 (x4)

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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