F4UJU — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: France Most frequent locator attributed to this token: JN06

Receiver-side FT8 activity involving F4UJU, decoded by SO8OO in southeastern Poland. 2,654 FT8 messages attributed to this token as transmitter, on 160m, 80m, 60m, 40m, 20m, 10m, across 38 UTC dates in the available aggregate history. Observed between 2026-06-26 and 2026-10-06.

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 2,654 FT8 messages attributed to F4UJU as the transmitting token by decoded message structure across 38 UTC dates in the available aggregate history. The largest monitored-band total was 80 m (72%), followed by 160 m (21%) and 20 m (3%). Most decodes (73%) fell within the six-hour window 23:00-05:00 UTC. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (74%); the estimated median was -1 dB.

Overview

2,654

Messages attributed

UTC dates decoded

379

Active 15-min windows

-1 dB

Estimated median S/N

Bands

160m · 556 80m · 1,907 60m · 40 40m · 39 20m · 75 10m · 37

First attributed message: 2026-06-26
Last attributed message: 2026-10-06 06:41 UTC

Observed FT8 message patterns

Attributed sample: 2,654 messages
Active dates: 38 UTC dates
Estimated median S/N: -1 dB
Estimated 10th-90th percentile: -15 to +10 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 247, moderate (-15 to -9 dB) 455, strong (≥ -8 dB) 1,952.

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 F4UJU in decoded directed-looking exchanges:

4L7T · Georgia ×2 CT2GQA · Portugal ×2 G8OO · England ×2 DH3MFW · Fed. Rep. of Germany ×2 DO1ID · Fed. Rep. of Germany ×2 F4MID · France ×2 RU9MJ · Asiatic Russia ×2 FK8HA · New Caledonia 2E0FVN · England AC1NU · United States DD3KF · Fed. Rep. of Germany DH1KJ · 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 F4UJU

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: JN06 · 1,882 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,581 km (approx.)
Last such locator decoded: 2026-10-06 06:41 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	F4UJU S/N	Counterpart	Counterpart S/N	Msgs	Capture
10-06 06:40	80m	-9 / -	ZL2CA	- / -	3	Partial capture
10-06 06:37	80m	-6 / -	WB6WUW	- / -25	2	✓ Closing fragment
10-06 06:10	80m	-5 / -	N8F	- / -8	3	✓ Closing fragment
10-06 05:57	80m	-5 / -	N8F	- / -	2	Partial capture
10-06 05:52	80m	-2 / -	N8F	- / -	2	Partial capture
10-06 05:35	80m	+4 / -	EA8DO	- / +8	2	✓ Closing fragment
10-06 05:28	80m	-1 / -	NJ1Q	- / -	3	Partial capture
10-06 04:56	80m	+3 / 0	CN8NY	-17 / -5	5	✓ Full exchange observed
10-06 04:00	80m	+17 / -	KU4GZ	- / -	3	Partial capture
10-06 03:56	80m	+9 / -	NP3RK	- / -6	3	✓ Closing fragment
10-06 03:47	80m	+8 / -	K8OD	- / -19	4	✓ Closing fragment
10-06 03:42	80m	+7 / -	N2HJ	- / -	3	Partial capture
10-06 03:36	80m	+6 / -	YU65AEC	- / -	3	Partial capture
10-06 03:32	80m	+6 / -	N0YO	- / -	3	Partial capture
10-06 03:28	80m	+12 / -	N0YO	- / -	2	Partial capture
10-06 03:20	80m	+8 / -	KD2TDA	- / -26	4	✓ Closing fragment
10-06 03:16	80m	+1 / -	K8OD	- / -	3	Partial capture
10-06 02:41	80m	- / -	DL4DP	-4 / -	2	Partial capture
10-06 02:40	80m	+15 / -	R9CS/P	+1 / +1	4	✓ Full exchange observed
10-06 02:35	80m	+2 / -	K8ET	- / -	3	Partial capture
10-06 02:31	80m	+7 / -6	4X5MZ	-7 / +7	4	✓ Full exchange observed
10-06 02:30	80m	+10 / -	N4KEB	- / -4	2	✓ Closing fragment
10-06 02:19	80m	+10 / -13	4X5MZ	-4 / -	2	Partial capture
10-06 02:14	80m	+12 / -	N5HHS	- / -	3	Partial capture
10-06 01:58	80m	+21 / -	HI3R	- / -15	3	✓ Closing fragment
10-06 01:49	80m	+6 / -	AA2MF	- / -9	3	✓ Closing fragment
10-06 01:37	80m	+5 / -	AA2MF	- / -	3	Partial capture
10-06 01:33	80m	+8 / -	W4DCJ	- / -	2	✓ Closing fragment
10-06 01:29	80m	+11 / -	1T2DHS/R	- / -	3	Partial capture
10-06 01:27	80m	+7 / -	R9RA	-9 / -14	4	✓ Closing observed
10-06 01:23	80m	+10 / -	K1MFD	- / -25	4	✓ Closing fragment
10-06 01:21	80m	+16 / -	N3F	- / -9	3	✓ Closing fragment
10-06 01:17	80m	+14 / -	KZ4MW	- / -	3	Partial capture
10-06 01:13	80m	+6 / -	K8RKZ	- / -	3	Partial capture
10-06 01:08	80m	+5 / -	K8RKZ	- / -	3	Partial capture
10-06 01:07	80m	- / -	DK8HC	+6 / -	4	Partial capture
10-06 01:05	80m	+12 / -	N9PGG	- / -13	4	✓ Closing fragment
10-06 01:04	80m	+12 / -	N3F	- / -	3	Partial capture
10-06 00:59	80m	+11 / -	WB6WUW	- / -	2	Partial capture
10-06 00:57	80m	+15 / -	VA2JWZ	- / -17	3	✓ Closing fragment
10-06 00:51	80m	+2 / -12	K1BUK/1	-24 / -7	3	Partial capture
10-06 00:49	80m	- / -	DK8HC	+2 / -	5	Partial capture
10-06 00:48	80m	+5 / -3	W1EQ	-20 / -11	4	✓ Full exchange observed
10-06 00:44	80m	+5 / -	KP3V	- / -	3	Partial capture
10-06 00:38	80m	+3 / -	K8DV	- / -	2	Partial capture
10-06 00:36	80m	+1 / -	NP4PS	- / -17	4	✓ Closing fragment
10-06 00:29	80m	+10 / -10	K2CBI	0 / -	3	Partial capture
10-06 00:19	80m	+13 / -	RW9ULK	- / -	3	Partial capture
10-06 00:14	80m	+12 / -	RW9ULK	- / -	3	Partial capture
10-06 00:08	80m	+7 / -	AA8CC	- / -11	3	✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

80m

UTC    dB Audio  Message
055230  +1 1306  N8F F4UJU JN06 (x8)
063230  -9 2304  WB6WUW F4UJU JN06 (x3)
063845 -15  868  F4UJU DK2MAX JN58
064030  -6 1004  ZL2CA F4UJU JN06 (x3)

60m

UTC    dB Audio  Message
224245  -6 2399  9T0MD F4UJU JN06 (x15)

160m

UTC    dB Audio  Message
233945  +0  842  K3VZ F4UJU JN06 (x2)
234415 -22 1517  RA9YTI F4UJU JN06 (x3)
235015 -17  842  K3VZ F4UJU JN06 (x3)
001015 -22 2057  VP8A F4UJU JN06 (x5)
001330 -10 2058  IS0BQE F4UJU JN06 (x2)

40m

UTC    dB Audio  Message
213515  -1 2602  PZ5RA F4UJU JN06 (x5)
230415 -10 1780  EA8CDG F4UJU JN06 (x3)
230615  +2 2565  VP2MAA F4UJU JN06 (x4)
230800  -9  857  F4UJU RR73; IS0CAK <...> -18
231000  +8 2565  OA4ENG F4UJU 73
000445 +20 2639  W8CJL F4UJU 73

10m

UTC    dB Audio  Message
140515  -1 2781  RI1FJL F4UJU JN06 (x6)
074915 -11 2667  FK8HA F4UJU JN06 (x6)
121030  +2  777  F4UJU 9K2HS -02

20m

UTC    dB Audio  Message
074330 +13 1942  TA7TC F4UJU JN06 (x4)
074600 +16 2935  R9HEB F4UJU JN06 (x3)
074900  +2 2043  TA2ZLM F4UJU JN06 (x3)
075030 +13  695  R2AL F4UJU -06 (x2)
075145 -12 2141  F4UJU US3LX KN89
075200  +1 2141  US3LX F4UJU -09 (x2)

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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