F4MTU — FT8 activity observed at SO8OO

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

Receiver-side FT8 activity involving F4MTU, decoded by SO8OO in southeastern Poland. 1,118 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, 10m, across 42 UTC dates in the available aggregate history. Observed between 2026-06-06 and 2026-09-17.

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 1,118 FT8 messages attributed to F4MTU as the transmitting token by decoded message structure across 42 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (38%), followed by 40 m (33%) and 80 m (24%). Most decodes (75%) fell within the six-hour window 03:00-09:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -6.1 dB.

Overview

1,118

Messages attributed

UTC dates decoded

148

Active 15-min windows

-6.1 dB

Estimated median S/N

Bands

80m · 269 40m · 371 20m · 420 10m · 58

First attributed message: 2026-06-06
Last attributed message: 2026-09-17 07:01 UTC

Observed FT8 message patterns

Attributed sample: 1,118 messages
Active dates: 42 UTC dates
Estimated median S/N: -6.1 dB
Estimated 10th-90th percentile: -16 to +7 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 134, moderate (-15 to -9 dB) 315, strong (≥ -8 dB) 669.

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 F4MTU in decoded directed-looking exchanges:

F1PBZ · France ×3 PD0HLA · Netherlands ×2 DL6UM · Fed. Rep. of Germany ×2 PE1NPS · Netherlands ×2 R5AV · European Russia ×2 UT0CK · Ukraine ×2 DL8WEM · Fed. Rep. of Germany ×2 ON5HE · Belgium ×2 SV1DKR · Greece ×2 DG6MAH/R · Fed. Rep. of Germany ×2 DO1OAS · Fed. Rep. of Germany ×2 DL1WKA · 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 F4MTU

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 · 529 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,799 km (approx.)
Last such locator decoded: 2026-09-17 06:45 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	F4MTU S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-17 06:52	40m	-16 / -	DA1TE	-10 / -17	6	✓ Full exchange observed
09-17 06:51	40m	- / -4	DL6EL	0 / -	3	✓ Closing fragment
09-17 06:45	40m	-16 / -	F1LPT/P	- / -	3	Partial capture
09-17 06:42	40m	-13 / -4	M8FQT	-17 / -	6	✓ Full exchange observed
09-17 06:36	40m	-3 / -	DJ7XY	- / +5	2	✓ Closing fragment
09-17 06:33	40m	-3 / -	N8PS	- / -13	3	Partial capture
09-17 06:25	40m	-17 / -6	SP1JQJ	-1 / -5	5	✓ Full exchange observed
09-17 06:23	40m	-12 / -	ON5HE	+3 / -	5	✓ Full exchange observed
09-17 06:19	40m	-13 / -16	SV1DKR	-21 / -12	4	✓ Full exchange observed
09-17 06:18	40m	-12 / -11	F1TXI	-12 / -17	12	✓ Full exchange observed
09-17 06:17	40m	- / -	F5LPL	-18 / -	4	Partial capture
09-17 06:16	40m	-15 / -	EA7TB	- / +6	2	✓ Closing fragment
09-17 06:11	40m	-15 / -13	US2UM	+5 / -10	7	✓ Full exchange observed
09-17 06:11	40m	-14 / -21	LY2EW	-8 / -	5	✓ Closing observed
09-17 05:56	40m	0 / -	WB9YXA	- / -20	4	✓ Closing fragment
09-17 05:42	40m	-8 / -	HJ4AAM	- / -	3	Partial capture
09-17 05:35	40m	-13 / +1	DL8WEM	+11 / -	4	✓ Full exchange observed
09-17 05:25	80m	-10 / -	EA8SG	- / -	2	Partial capture
09-17 05:15	80m	-3 / -	DO1ID	+5 / +7	6	✓ Full exchange observed
09-17 05:13	80m	-13 / -	W8CO	- / -16	3	✓ Closing fragment
09-17 05:00	80m	-6 / -	PA3KUS	- / -	3	Partial capture
09-17 04:58	80m	+2 / -	F4FQY	-5 / -	4	✓ Closing observed
09-17 04:51	80m	- / +4	ON7HM	-15 / -	3	Partial capture
09-17 04:50	80m	- / -	EA3HMM	-11 / -	3	Partial capture
09-17 04:48	80m	-2 / -	F5NBU	- / -	3	Partial capture
09-17 04:44	80m	-22 / -	2E0PMS	-7 / +7	3	✓ Closing observed
09-17 04:43	80m	-6 / 0	OZ1KZX	+4 / -	13	✓ Closing observed
09-17 04:42	80m	-12 / -	ON8DM	+4 / -	3	✓ Closing observed
09-17 04:30	80m	0 / +4	DO1OAS	-7 / -10	5	✓ Full exchange observed
09-17 04:29	80m	-5 / -	EA5JHD	- / -12	2	✓ Closing fragment
09-17 04:28	80m	-6 / -	ON5HE	-2 / -	4	✓ Closing observed
09-17 04:26	80m	-6 / -	DO1FZL	-4 / -2	3	✓ Closing observed
09-17 04:24	80m	-8 / -1	SN1A	+1 / +9	5	✓ Full exchange observed
09-17 04:13	80m	- / -	UX7QV	+2 / -	7	Partial capture
09-16 05:39	80m	-15 / -	EA4EER	- / -	2	✓ Closing fragment
09-16 05:37	80m	-17 / -3	G0OYQ	-13 / -	3	Partial capture
09-16 05:27	80m	-15 / -	XE2V	- / -	3	Partial capture
09-16 05:23	80m	-18 / -	F5RMK	- / -	2	Partial capture
09-16 05:21	80m	-14 / -	VE3DZ	- / -9	2	Partial capture
09-16 05:18	80m	0 / -	EA6A	- / -	5	✓ Closing fragment
09-16 05:14	80m	-8 / -11	SQ6WA	+11 / -13	7	✓ Full exchange observed
09-16 05:13	80m	-6 / -	F4FQY	- / -	4	Partial capture
09-16 05:09	80m	-6 / -	F5LMJ	- / +5	6	Partial capture
09-16 05:05	80m	-8 / -13	DO5PAP	-10 / -24	7	✓ Full exchange observed
09-16 05:03	80m	-7 / +1	DL3TC	+2 / -6	5	✓ Full exchange observed
09-16 05:01	80m	-4 / -	DO2KTE	-4 / -4	4	✓ Closing observed
09-16 04:54	80m	-7 / -2	9A3AUH	-1 / -14	8	✓ Full exchange observed
09-16 04:53	80m	-8 / -	DG6MAH/R	- / -10	2	✓ Closing fragment
09-16 04:49	80m	-10 / -	AC9HP	- / -20	7	✓ Closing fragment
09-16 04:46	80m	-6 / -3	PA4PA	+8 / +7	5	✓ Full exchange observed

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
064330 -13 1275  M8FQT F4MTU R+12 (x2)
064545 -18 1898  F1LPT/P F4MTU IN88 (x3)
065130  -1  611  F4MTU DL6EL JN57 (x2)
065200  -9 1709  F4MTU DA1TE JO50
065230  +0  611  F4MTU DL6EL 73
065230 -13 1709  F4MTU DA1TE JO50
065245 -15 1497  DA1TE F4MTU -17
065300  -9 1709  F4MTU DA1TE R+11
065315 -18 1497  DA1TE F4MTU RR73
065330  -8 1709  F4MTU DA1TE 73
070115  -9 2442  EA1AEC F4MTU RR73

80m

UTC    dB Audio  Message
045930  +3  457  F4FQY F4MTU 73
050000  -3  875  PA3KUS F4MTU IN88 (x3)
051345 -16 1395  W8CO F4MTU IN88 (x3)
051530  +6  382  F4MTU DO1ID +13 (x3)
051830  -3  384  DO1ID F4MTU R+07
051845  +0  382  F4MTU DO1ID RR73
051900  -3  384  DO1ID F4MTU 73
052515 -10 2427  EA8SG F4MTU IN88 (x2)

20m

UTC    dB Audio  Message
082115  -2 2735  CQ F4MTU IN88
082130 -14 1960  F4MTU IV3KON JN65
082145  -2 2735  EA3CY F4MTU -19 (x5)
082700  +2 2027  VK3BMA F4MTU IN88 (x4)
083230  +2 2625  VK6YNE F4MTU IN88 (x3)
083415  -9 2404  VK3DHI F4MTU IN88

10m

UTC    dB Audio  Message
095645  -7 2635  F4MTU F1PBZ +01
094615 -20 1016  EB3FRN F4MTU R+10
095100 -13 2639  F4MTU DL1WKA 73
082245  +5  499  F4MTU TK5K -06 (x2)
201215  +5 2796  F4MTU F1PBZ -10 (x2)
064615 -16 2480  HF5A F4MTU -17 (x2)
064830  -7 2480  F4MTU DN9AST JO32 (x2)
065315 -15 2478  CQ F4MTU IN88                         a1
065345 -12 2479  HA1WQ F4MTU +01
140500 -10 1783  F4MTU PE9JAN JO22 (x2)

60m

UTC    dB Audio  Message
044545  -6 2531  F4MTU PE1NPS JO22
044545 -22 1528  F4MTU PC2F JO22
044545 -15 1359  F4MTU ON7KEI JO21
044615  -5 2531  F4MTU PE1NPS R-10
044615 -22 1360  F4MTU ON7KEI JO21
044645  -3 2531  F4MTU PE1NPS 73
044645 -15 1359  F4MTU ON7KEI JO21
044715 -17 1528  F4MTU PC2F JO22 (x4)
045315  -3  578  F4MTU G0BLB IO81 (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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