F4MUM — 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: France Most frequent locator attributed to this token: JO10

Receiver-side FT8 activity involving F4MUM, decoded by SO8OO in southeastern Poland. 507 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, across 8 UTC dates in the available aggregate history. Observed between 2026-08-30 and 2026-11-04.

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 507 FT8 messages attributed to F4MUM as the transmitting token by decoded message structure across 8 UTC dates in the available aggregate history. The largest monitored-band total was 80 m (74%), followed by 40 m (26%) and 20 m (0%). Several six-hour UTC windows tied for the largest share (97%), so no unique busiest interval is claimed. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (94%); the estimated median was +1 dB.

Overview

507

Messages attributed

UTC dates decoded

Active 15-min windows

+1 dB

Estimated median S/N

Bands

80m · 374 40m · 132 20m · 1

First attributed message: 2026-08-30
Last attributed message: 2026-11-04 18:49 UTC

Observed FT8 message patterns

Attributed sample: 507 messages
Active dates: 8 UTC dates
Estimated median S/N: +1 dB
Estimated 10th-90th percentile: -6 to +6 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 11, moderate (-15 to -9 dB) 18, strong (≥ -8 dB) 478.

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 F4MUM in decoded directed-looking exchanges:

DM3ER · Fed. Rep. of Germany ×2 DL3MIB · Fed. Rep. of Germany F1IQH · France HG8LXL · Hungary IZ0ZIP · Italy LB5WB · Norway OE3UKW · Austria OH3OJ · Finland OK1WCF · Czech Republic SP9W · Poland 4X6ZK · Israel DA6DN · Fed. Rep. of Germany

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 F4MUM

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: JO10 · 236 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,335 km (approx.)
Last such locator decoded: 2026-11-04 18:49 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	F4MUM S/N	Counterpart	Counterpart S/N	Msgs	Capture
11-04 18:43	80m	- / -	EW4TT	+21 / -	2	Partial capture
11-04 18:43	80m	+5 / -1	SP4WJ	0 / -12	8	Partial capture
11-04 18:39	80m	0 / -	ON3SWS	-12 / -	2	Partial capture
11-04 18:35	80m	+8 / -	OK6AB	+8 / -	4	✓ Closing observed
11-04 18:34	80m	- / -	RD7LO	-12 / -	4	Partial capture
11-04 18:29	80m	- / -	UR4QGV	-15 / -	3	Partial capture
11-04 18:29	80m	- / -15	RJ3DC	-4 / -	2	Partial capture
11-04 18:29	80m	+3 / -15	UR4QWW	-10 / -14	7	Partial capture
11-04 18:27	80m	+6 / -1	DL2MEL	+1 / -2	5	✓ Full exchange observed
11-04 18:24	80m	+4 / -1	SQ4INW	+8 / +1	5	✓ Full exchange observed
11-04 18:21	80m	-3 / -	DB2QM	- / -9	2	Partial capture
11-04 18:20	80m	- / -	9A2WA	-16 / -	2	Partial capture
11-04 18:17	80m	+4 / -16	UR4LG	-8 / -23	7	✓ Full exchange observed
11-04 18:15	80m	- / -	DA6NEL	+9 / -	2	Partial capture
11-04 18:15	80m	+7 / -	EA1BUK	- / -5	3	Partial capture
11-04 18:08	80m	-2 / -	PA0EBG	- / 0	2	Partial capture
11-04 18:05	80m	+4 / -	F8ATS	- / +10	2	Partial capture
11-04 18:04	80m	0 / +3	EI6JMB	-16 / -3	4	Partial capture
11-04 17:58	80m	- / -6	DO1SPK	-22 / -	3	✓ Closing fragment
11-04 17:54	80m	+3 / -	4X6ZK	-18 / -24	3	✓ Closing observed
11-04 17:53	80m	- / -	RJ3DC	-14 / -	2	Partial capture
11-04 17:52	80m	+5 / -	EA3FR	- / -20	2	✓ Closing fragment
11-04 17:51	80m	- / -	R5BU	-18 / -	4	Partial capture
11-04 17:49	80m	+4 / -	DO4FOX	- / -6	4	Partial capture
11-04 17:43	80m	-4 / -	F4GCB/P	- / -5	2	Partial capture
11-04 17:41	80m	-2 / +4	DO5HOK	-9 / -	5	✓ Full exchange observed
11-04 17:39	80m	-2 / +8	DL9GCR	-16 / -5	4	✓ Full exchange observed
11-04 17:37	80m	0 / -7	IZ4EFV	-11 / -13	4	Partial capture
11-04 17:36	80m	0 / -	DL1DEU	-1 / -1	5	✓ Full exchange observed
11-04 17:35	80m	0 / +4	DH9DR	-2 / -	4	✓ Full exchange observed
11-04 17:33	80m	-2 / -	DO7MEW	-21 / +6	3	✓ Closing observed
11-04 17:31	80m	-4 / -11	OG1C	+2 / +2	5	✓ Full exchange observed
11-04 17:30	80m	- / -	RJ3DC	-16 / -	2	Partial capture
11-04 17:29	80m	0 / -	DO9YU	- / 0	2	Partial capture
11-04 17:28	80m	- / -	RW3DC	+3 / -	3	Partial capture
11-04 17:27	80m	0 / -	G0UUS	- / -15	3	Partial capture
11-04 17:23	80m	+2 / -10	UX7UU	-2 / -9	10	Partial capture
11-04 17:23	80m	- / -	RJ3DC	-24 / -	2	Partial capture
11-04 17:22	80m	+2 / -	IZ5FSO	- / -10	2	Partial capture
11-04 17:21	80m	- / -	HF5A	-10 / -	2	Partial capture
11-04 17:19	80m	- / -	RJ3DC	-18 / -	2	Partial capture
11-04 17:18	80m	+6 / -	DK0BO	- / -7	2	Partial capture
11-04 17:16	80m	- / -13	R5AV	-4 / -	8	Partial capture
11-04 17:16	80m	- / -	R7CD	-18 / -	2	Partial capture
11-04 17:14	80m	- / -	SQ9LOJ	+4 / -	2	Partial capture
11-04 17:13	80m	+7 / -	OM1TT	- / -21	3	Partial capture
11-04 17:11	80m	+5 / -	M3FGR	- / -6	3	Partial capture
11-04 17:09	80m	- / -	OM1TT	-12 / -	3	Partial capture
11-04 17:08	80m	+4 / -	DA1ST	-6 / -1	4	Partial capture
11-04 17:07	80m	- / -	HF5A	-8 / -	5	Partial capture

Recent FT8 messages decoded at SO8OO

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

80m

UTC    dB Audio  Message
184400  +5  557  CQ F4MUM JO10
184415 +20  558  F4MUM EW4TT KO23
184430  +7  557  CQ F4MUM JO10 (x2)
184515  +4  557  F4MUM SP4WJ KO03
184530  +3  557  SP4WJ F4MUM -12
184545  -3  557  F4MUM SP4WJ R-01
184600  +6  557  SP4WJ F4MUM RRR (x4)
184800  +6  557  CQ F4MUM JO10 (x4)

40m

UTC    dB Audio  Message
181000  -4  595  YO2MKE F4MUM RRR
181230  -4  594  OM3CUP F4MUM R-05
181430  -1  595  9A3AUH F4MUM +04 (x2)
181530  +1  595  CQ F4MUM JO10 (x2)
181615  +0  645  F4MUM UA6YW LN04
181630  +2  595  CQ F4MUM JO10
181645  -2  645  F4MUM UA6YW LN04
181645  +0  594  F4MUM RY7G LN14
181715  -6  645  F4MUM UA6YW LN04
181715  -3  594  F4MUM RY7G LN14
181745  -5  645  F4MUM UA6YW LN04 (x3)

20m

UTC    dB Audio  Message
203900  +5 1289  CQ F4MUM JO10

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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