F4HMU — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: France Most frequent locator attributed to this token: IN88

Receiver-side FT8 activity involving F4HMU, decoded by SO8OO in southeastern Poland. 75 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, 10m, across 20 UTC dates in the available aggregate history. Observed between 2026-06-27 and 2026-09-18.

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 75 FT8 messages attributed to F4HMU as the transmitting token by decoded message structure across 20 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (60%), followed by 40 m (16%) and 10 m (16%). Most decodes (72%) fell within the six-hour window 15:00-21:00 UTC. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (71%); the estimated median was -5 dB.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-5 dB

Estimated median S/N

Bands

80m · 6 40m · 12 20m · 45 10m · 12

First attributed message: 2026-06-27
Last attributed message: 2026-09-18 18:53 UTC

Observed FT8 message patterns

Attributed sample: 75 messages
Active dates: 20 UTC dates
Estimated median S/N: -5 dB
Estimated 10th-90th percentile: -11 to +2 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 1, moderate (-15 to -9 dB) 21, strong (≥ -8 dB) 53.

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 F4HMU in decoded directed-looking exchanges:

DN9KK · Fed. Rep. of Germany SP6FME · Poland SV2CLJ · Greece KB3Z · United States OH1LA · Finland OH3EYR · Finland PD2ARI · Netherlands R1AV · European Russia RN6MA · European Russia BU2FW · Taiwan YO6LM · Romania DO9BAU · 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 F4HMU

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: IN88 · 52 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,799 km (approx.)
Last such locator decoded: 2026-09-18 18:53 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	F4HMU S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-18 18:48	40m	- / -	SV2AOB	-4 / -	2	Partial capture
08-25 20:29	40m	- / -	G6MTI	-9 / -	2	Partial capture
08-25 20:25	40m	- / -	ON4MAP	-10 / -	4	Partial capture
08-25 20:24	40m	- / -	F4BYA	-4 / -	4	Partial capture
08-25 20:23	80m	- / -	US5WDP	+14 / -	2	Partial capture
08-25 20:22	80m	- / -	DK8HC	-4 / -	5	Partial capture
08-21 16:36	10m	- / -	DF7EE	-9 / -	4	Partial capture
08-12 19:06	10m	- / -8	F1PBZ	+4 / -	4	Partial capture
08-12 13:00	10m	- / -	DL4FCH	-16 / -	2	Partial capture
08-10 19:54	40m	- / -	DL1EDR	-3 / -	2	Partial capture
08-10 19:42	80m	- / -	DO9BAU	+2 / -	2	✓ Closing fragment
08-10 19:42	80m	- / -1	OZ1LFI	-14 / -	3	✓ Closing fragment
08-06 19:46	40m	- / -	S51PV	-16 / -	2	Partial capture
08-03 20:16	40m	-9 / -	BU2FW	- / -	2	✓ Closing fragment
07-31 19:21	40m	- / -9	YO6LM	-2 / -	3	✓ Closing fragment
07-25 06:57	20m	- / -	DL1UDO	-15 / -	4	Partial capture
07-25 06:51	20m	-4 / -	KB3Z	- / -11	3	✓ Closing fragment
07-25 06:49	20m	- / -	PD0DEX	-19 / -	2	Partial capture
07-18 09:41	10m	- / -	DL0DM	-2 / -	2	Partial capture
07-18 09:37	10m	- / -	R6DVV	-13 / -	4	Partial capture
07-16 18:44	20m	- / -	IK4LZH	-6 / -	3	Partial capture
07-16 18:41	20m	- / -	RW6AP	-12 / -	2	Partial capture
07-16 16:47	20m	+2 / -	R1AV	- / +7	3	✓ Closing fragment
07-16 16:45	20m	+1 / -	OH1LA	- / -4	2	✓ Closing fragment
07-16 16:42	20m	+4 / -	PD2ARI	- / +1	2	✓ Closing fragment
07-16 16:42	20m	- / -	PD0IFI	-4 / -	2	Partial capture
07-16 16:31	20m	-2 / -	OH3EYR	- / -5	3	✓ Closing fragment
07-16 16:16	20m	- / -15	RN6MA	+14 / -	3	✓ Closing fragment
07-15 19:47	10m	- / 0	SV2CLJ	-9 / -	2	✓ Closing fragment
07-13 13:33	20m	- / -	PD3LKN	-11 / -	2	Partial capture
07-13 13:32	10m	- / -	DJ0MAB	-1 / -	4	Partial capture
07-13 13:30	10m	-10 / +5	DN9KK	-10 / -	3	✓ Closing observed
07-10 19:30	20m	- / -2	RN6MA	+13 / -	3	Partial capture
07-10 19:24	20m	- / -7	RN6MA	+8 / -	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
202530  -9  664  F4HMU ON4MAP JO20
202530  -5 2138  F4HMU F4BYA JN19
202600 -12  664  F4HMU ON4MAP JO20 (x2)
202900 -11  990  F4HMU G6MTI IO81 (x2)
184800 -10  535  CQ F4HMU IN88                         a1 (x2)
184845  -6 2387  F4HMU SV2AOB KN10 (x2)
184915  -3  526  F4HMU DH1JAD JO31
185000  -5  469  EB2EMZ F4HMU -11
185130  -2  469  CQ F4HMU IN88 (x3)

80m

UTC    dB Audio  Message
194300  +0 2302  F4HMU DO9BAU RR73
194400 -14 1609  F4HMU OZ1LFI 73
194800  -9  401  CQ F4HMU IN88 (x5)
202230  -4  566  F4HMU DK8HC JO42
202300 +13 1090  F4HMU US5WDP KN29
202300  -1  302  F4HMU DO5KHR JO30
202300  -8  565  F4HMU DK8HC JO42
202330 +16 1090  F4HMU US5WDP KN29
202330 -10  565  F4HMU DK8HC JO42 (x3)

10m

UTC    dB Audio  Message
130045 -20 2130  F4HMU DL4FCH JO40
130115  -7  476  F4HMU EA7Z IM67
130115 -18 2379  F4HMU DO9BAU JO62
130115 -12 2130  F4HMU DL4FCH JO40
130815 -17 1440  F4HMU DN9AD JO52
190545 -11  491  F4HMU IK4LZH JN54
190615  +2 2684  F4HMU F1PBZ -08 (x4)
163230 -10  473  CQ F4HMU IN88
163645  -8 1276  F4HMU DF7EE JO40 (x4)

20m

UTC    dB Audio  Message
065830 -14 1214  F4HMU DL1UDO JO31
065900 -12  520  F4HMU PC2J JO22
095130  -3  467  CQ F4HMU IN88 (x3)
200330  +2  556  JA1PSS F4HMU -15
200600  -6  557  CQ F4HMU IN88                         a1
200700  -9  556  UT8SQ F4HMU -04
200800  -8  557  JH5AVM F4HMU IN88
200930  -3  557  JA4MOK F4HMU R-10
201030  +1  557  CQ F4HMU IN88                         a1 (x2)
133830 -10  466  <...> F4HMU
064130  -2  468  CQ F4HMU IN88 (x2)

60m

UTC    dB Audio  Message
194545  -6  428  F4HMU EB3JT JN01

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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