F4MUD — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: France Most frequent locator attributed to this token: JN09

Receiver-side FT8 activity involving F4MUD, decoded by SO8OO in southeastern Poland. 2,474 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, 10m, across 47 UTC dates in the available aggregate history. Observed between 2026-06-21 and 2026-09-12.

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 2,474 FT8 messages attributed to F4MUD as the transmitting token by decoded message structure across 47 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (97%), followed by 10 m (2%) and 80 m (1%). Most decodes (64%) fell within the six-hour window 16:00-22:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -9 dB.

Overview

2,474

Messages attributed

UTC dates decoded

299

Active 15-min windows

-9 dB

Estimated median S/N

Bands

80m · 34 40m · 7 20m · 2,391 10m · 42

First attributed message: 2026-06-21
Last attributed message: 2026-09-12 21:28 UTC

Observed FT8 message patterns

Attributed sample: 2,474 messages
Active dates: 47 UTC dates
Estimated median S/N: -9 dB
Estimated 10th-90th percentile: -19 to -0.9 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 541, moderate (-15 to -9 dB) 774, strong (≥ -8 dB) 1,159.

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 F4MUD in decoded directed-looking exchanges:

D2UY · Angola ×2 A41ZZ · Oman ×2 MW7RHR · Wales ×2 DL3MIB · Fed. Rep. of Germany F4LZZ · France GI5CEO · Northern Ireland I8EJC · Italy SV2ROC · Greece TN8GD · Republic of the Congo 2E0BRU · England 3A2MW · Monaco 3V8HP · Tunisia

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 F4MUD

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: JN09 · 151 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,491 km (approx.)
Last such locator decoded: 2026-07-13 17:21 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	F4MUD S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-16 12:31	40m	- / -8	DL6EL	-8 / -	2	✓ Closing fragment
09-12 21:25	40m	-15 / -	F4NFM	- / -15	6	Partial capture
09-12 12:55	40m	- / -11	PE1MHY	-13 / -	2	Partial capture
09-12 12:47	40m	- / -5	PE1MHY	-11 / -	9	Partial capture
09-12 12:41	40m	- / -3	PE1MHY	-12 / -	6	Partial capture
09-12 12:34	40m	- / -16	PE1MHY	-8 / -	2	Partial capture
09-12 12:31	40m	- / -8	ON1DGN	-21 / -	3	Partial capture
09-12 07:39	40m	- / -8	PA7ZZ	-14 / -	2	Partial capture
09-10 12:12	40m	- / -	DL3MIB	+4 / -	7	Partial capture
09-09 15:43	40m	- / -16	SP6LHT	+3 / -	3	Partial capture
09-09 14:54	40m	- / -18	F4HMP	-19 / -	2	✓ Closing fragment
09-09 11:43	40m	- / -	DL9KM	-9 / -	7	Partial capture
09-09 10:53	40m	- / -	PA2RO	-16 / -	2	Partial capture
09-09 10:42	40m	- / -	PA2RO	-18 / -	2	Partial capture
09-08 21:00	40m	- / -15	OZ1NIB	-9 / -	2	Partial capture
08-31 20:31	20m	-3 / -	G0HEU	- / -19	9	Partial capture
08-31 20:27	20m	0 / -14	M7JVT	0 / -8	9	✓ Full exchange observed
08-31 19:06	20m	-2 / -	G0LJU	- / -22	17	Partial capture
08-31 18:51	20m	-4 / -	G0LJU	- / -22	8	Partial capture
08-31 18:44	20m	-1 / -	G0LJU	- / -22	7	Partial capture
08-31 18:39	20m	-2 / -	G0LJU	- / -22	3	Partial capture
08-31 18:29	20m	-5 / -	F4JZW	- / -16	4	Partial capture
08-31 18:23	20m	-3 / -	TA2ED	- / -2	3	Partial capture
08-31 18:13	20m	-5 / -	SA0WAE	- / 0	3	Partial capture
08-31 18:10	20m	-3 / -	EA5W	-1 / -	4	✓ Closing observed
08-31 18:03	20m	0 / -	I0WBX	- / -	6	Partial capture
08-31 18:02	20m	-1 / -	R6LMH	- / -3	3	Partial capture
08-31 17:56	20m	-3 / -	PD0RDD	- / -17	6	Partial capture
08-31 11:39	20m	-9 / -	W1AW/2	- / +5	4	Partial capture
08-31 11:34	20m	- / -	EB3JT	-3 / -	3	Partial capture
08-31 07:52	20m	-7 / -	ON3BEN	- / -12	5	Partial capture
08-31 07:49	20m	-9 / -	KS4OT	- / -11	3	Partial capture
08-31 07:48	20m	0 / -	SQ5PTZ	- / +6	2	✓ Closing fragment
08-21 20:55	20m	-15 / -	IU4BJC	0 / +6	2	✓ Closing observed
08-20 20:16	20m	-2 / -9	SV8GXC	0 / -4	10	Partial capture
08-20 19:56	20m	-10 / -	TJ1GD	- / -14	4	Partial capture
08-20 18:18	20m	-10 / -	LZ4VR	- / -2	2	Partial capture
08-20 18:16	20m	-10 / -	F5RMK	- / -18	2	Partial capture
08-20 07:25	20m	-7 / 0	UA3AIU	-8 / +10	13	Partial capture
08-20 07:21	20m	- / -	F4LZZ	-16 / -	2	Partial capture
08-19 10:23	20m	-18 / -	OZ9WRH	- / -4	4	Partial capture
08-19 10:21	20m	-14 / -11	F4EXC	-10 / +3	5	✓ Full exchange observed
08-19 10:20	20m	- / -	EB3JT	-14 / -	2	Partial capture
08-19 10:19	20m	-15 / -	OH5C/P	- / +3	2	Partial capture
08-19 10:15	20m	-10 / -	SA6LIH	- / +5	5	✓ Closing fragment
08-19 10:10	20m	-14 / -	YO4BKM	- / -5	9	Partial capture
08-19 10:07	20m	-16 / -	5P5Z	- / +8	6	Partial capture
08-19 10:02	20m	-11 / -	F1PSX	- / 0	10	Partial capture
08-17 08:43	20m	-14 / -	F5OYA/P	- / +9	5	Partial capture
08-17 07:51	20m	-17 / -	YV5JLO	- / -10	5	✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
125200 -15  895  F4MUD PE1MHY -02 (x5)
170900 -10  303  F4MUD EA3HLM R-13
212545 -14  304  F4NFM F4MUD -15 (x6)
194900  -7 2189  F4MUD OZ/DG4BRT R-10
123115  -7  594  F4MUD DL6EL R-08 (x2)

20m

UTC    dB Audio  Message
202830  -5 1565  M7JVT F4MUD -08 (x3)
202945  +0 1230  F4MUD M7JVT R-14
203000  +6 1565  M7JVT F4MUD RR73
203015  -1 1230  F4MUD M7JVT 73
203130  +1 1565  G0HEU F4MUD -19 (x9)

10m

UTC    dB Audio  Message
190845 -21 1399  PP5HR F4MUD -18 (x4)
191315 -13 1168  GI5CEO F4MUD RR73
191545 -20 1262  LY1SR F4MUD -09 (x5)
191915 -20 1268  PD1HBL F4MUD -12 (x5)

80m

UTC    dB Audio  Message
203930  -9  923  IK4OLQ F4MUD -03
204030  -9  933  DO2PY F4MUD +01
204045  -5  829  F4MUD DO2PY R-07
204100 -10  829  DO2PY F4MUD RR73
204300  -6  922  F5JAE F4MUD -09 (x3)
204430 -10  923  IK4OLQ F4MUD -03 (x5)
204800  -8  924  DH5BO F4MUD +02 (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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