F4MXU — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: France Most frequent locator attributed to this token: JN25

Receiver-side FT8 activity involving F4MXU, decoded by SO8OO in southeastern Poland. 736 FT8 messages attributed to this token as transmitter, on 80m, 60m, 40m, 20m, 10m, across 45 UTC dates in the available aggregate history. Observed between 2026-06-07 and 2026-10-08.

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 736 FT8 messages attributed to F4MXU as the transmitting token by decoded message structure across 45 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (79%), followed by 10 m (11%) and 40 m (6%). Several six-hour UTC windows tied for the largest share (54%), so no unique busiest interval is claimed. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -8.1 dB.

Overview

736

Messages attributed

UTC dates decoded

155

Active 15-min windows

-8.1 dB

Estimated median S/N

Bands

80m · 23 60m · 11 40m · 41 20m · 582 10m · 79

First attributed message: 2026-06-07
Last attributed message: 2026-10-08 21:52 UTC

Observed FT8 message patterns

Attributed sample: 736 messages
Active dates: 45 UTC dates
Estimated median S/N: -8.1 dB
Estimated 10th-90th percentile: -17 to +3.2 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 108, moderate (-15 to -9 dB) 255, strong (≥ -8 dB) 373.

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 F4MXU in decoded directed-looking exchanges:

SV1CQN · Greece F5MYK · France 8Z1IT · Saudi Arabia AI7RZ · United States C31KC · Andorra DL1BBO · Fed. Rep. of Germany F4ACR · France F4GYM/P · France HC5RF · Ecuador K1SM · United States K5DCW · United States KB1EFS · United States

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 F4MXU

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: JN25 · 559 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,346 km (approx.)
Last such locator decoded: 2026-10-08 21:48 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	F4MXU S/N	Counterpart	Counterpart S/N	Msgs	Capture
10-12 22:26	160m	- / -17	F5MYK	-9 / -	2	✓ Closing fragment
10-12 20:21	40m	- / -16	CT7AXN	-11 / -	4	Partial capture
10-10 22:05	80m	- / -	EA3HMM	+3 / -	3	Partial capture
10-10 22:04	80m	- / -4	IZ2ODN	-2 / -	2	✓ Closing fragment
10-08 21:48	80m	-8 / -21	RN2F	+11 / -10	17	✓ Full exchange observed
10-08 21:39	60m	-23 / -	EA5FD	-18 / -6	3	Partial capture
10-08 21:37	60m	-20 / -	VE1YX	- / -	4	Partial capture
10-08 21:26	60m	- / -18	G3WGC	-7 / -	4	✓ Closing fragment
10-08 21:24	60m	- / -17	G0AZH	-7 / -	5	✓ Closing fragment
10-08 21:23	60m	- / -	OH1LA	-13 / -	3	Partial capture
10-08 06:55	40m	-13 / -	C5R	- / -	2	Partial capture
10-06 06:32	60m	- / -12	DL5DQZ	-2 / -	7	✓ Closing fragment
10-06 06:30	60m	- / -8	DL9KM	-18 / -	7	✓ Closing fragment
10-06 06:30	60m	- / -15	G0JEI	-12 / -	2	Partial capture
10-06 06:01	40m	-17 / -	CO2MX	- / -	3	Partial capture
10-06 05:58	40m	-13 / -	KA1MXL	- / -12	2	✓ Closing fragment
09-16 21:59	40m	- / -24	G4YAN	+1 / -	3	Partial capture
09-14 23:33	60m	- / -10	PI4TX	-10 / -	3	✓ Closing fragment
09-14 23:31	60m	- / -14	EA1IOK	-1 / -	4	✓ Closing fragment
09-13 21:07	40m	-4 / -	IW0RLC	- / -	2	Partial capture
09-13 21:05	40m	-14 / -	II9IAGM	- / +1	2	Partial capture
09-11 07:00	40m	- / -9	PA3BMB	-7 / -	3	Partial capture
09-11 06:41	40m	- / -	IK2ZJR	0 / -	4	Partial capture
09-11 06:34	40m	- / -16	DL3MIB	+7 / -	11	Partial capture
09-11 06:31	40m	- / -7	DL3IAK	-11 / -	3	Partial capture
09-11 06:31	40m	- / -	F4BYA	0 / -	3	Partial capture
09-11 06:03	40m	-14 / -5	OZ1KZX	-12 / -5	4	✓ Full exchange observed
09-11 06:00	40m	-8 / -	KT4ZG	- / -	2	Partial capture
09-11 05:46	40m	-17 / -1	IK4TVP	-8 / +10	5	✓ Full exchange observed
09-11 05:43	40m	-8 / -	N8HRZ	- / -	2	Partial capture
09-08 05:32	40m	-18 / -	SM7WNM	- / -	2	Partial capture
08-31 06:59	20m	+1 / -	5N0YEN	- / -	12	Partial capture
08-31 06:57	20m	-1 / -	KS4OT	- / -	4	Partial capture
08-30 22:58	80m	- / -5	F5RMK	-8 / -	4	Partial capture
08-30 22:50	80m	- / -	GM6URC	-8 / -	3	Partial capture
08-30 22:49	80m	-19 / -5	F5RMK	-11 / -	15	Partial capture
08-30 22:48	80m	- / -14	DH1PS	+3 / -	4	✓ Closing fragment
08-30 22:47	80m	- / -15	EI4JFB	-16 / -	3	✓ Closing fragment
08-30 22:44	80m	-9 / -	R9OAE	- / -	2	Partial capture
08-30 22:37	40m	- / -8	TC30AGU	0 / -	2	Partial capture
08-30 22:00	20m	- / -24	VE3NVK	-22 / -	4	✓ Closing fragment
08-30 21:35	20m	-14 / -	KB1EFS	-5 / -4	2	✓ Closing observed
08-30 21:22	20m	-8 / -	KF9UG	-5 / -5	3	✓ Closing observed
08-30 20:48	20m	+11 / -	A41RX	- / -	5	Partial capture
08-30 20:45	20m	+10 / -	A41RX	- / -	2	Partial capture
08-30 20:43	20m	+9 / -	II7MGMU	- / -8	2	Partial capture
08-30 20:41	20m	+9 / -	KS4OT	- / -	4	Partial capture
08-30 20:33	20m	+7 / -	KS4OT	- / -	8	Partial capture
08-28 09:19	10m	-12 / -	VK8MA	- / -	11	Partial capture
08-28 09:07	20m	-18 / -16	HB10GBT	-17 / -9	3	Partial capture

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
220045  +7  714  F4MXU G4YAN -24 (x2)
055830 -12  649  KA1MXL F4MXU R-12 (x2)
060100 -15  595  ZL3TUX F4MXU 73
060130 -17  743  CO2MX F4MXU JN25 (x3)
065545 -13  711  C5R F4MXU JN25 (x2)
202130 -11 1541  F4MXU CT7AXN IM59 (x4)
190900  -6 1532  F4MXU F3CJ JO10

160m

UTC    dB Audio  Message
222645  -8 2200  F4MXU F5MYK -17 (x2)

80m

UTC    dB Audio  Message
215000 +14 2268  F4MXU RN2F -21
215015  -5 2269  RN2F F4MXU R-10
215030  +8 2268  F4MXU RN2F -21
215045 -10 2269  RN2F F4MXU R-16
215100 +10 2268  F4MXU RN2F -21
215115  -6 2269  RN2F F4MXU R-10
215130  +4 2268  F4MXU RN2F -21
215145  -5 2269  RN2F F4MXU R-15
215200  +9 2268  F4MXU RN2F RR73
215215  -2 2269  RN2F F4MXU 73
220445  -3 2161  F4MXU IZ2ODN -04 (x2)
220545  +5  359  F4MXU EA3HMM JN00 (x3)

60m

UTC    dB Audio  Message
212530  -5  637  F4MXU G0AZH R-17
212600  -4  579  F4MXU G3WGC JO02
212600  -8  637  F4MXU G0AZH 73
212630 -12  579  F4MXU G3WGC JO02 (x3)
213545 -24 1688  OK1TRJ F4MXU 73
213745 -16 1281  VE1YX F4MXU JN25 (x4)
213930 -18 1782  F4MXU EA5FD IM99
213945 -23 1608  SP3JHZ F4MXU JN25
214045 -24 1608  EA5FD F4MXU -06 (x2)

20m

UTC    dB Audio  Message
065745  -2 1775  KS4OT F4MXU JN25 (x3)
065945  +0 1251  5N0YEN F4MXU JN25 (x12)

10m

UTC    dB Audio  Message
152100 -10 1967  F4MXU SV1CQN RR73
124700 -24 2131  OH0ERF F4MXU JN25 (x2)
091900 -13 2479  VK8MA F4MXU JN25 (x11)

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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