F5NBU — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: France Most frequent locator attributed to this token: JN28

Receiver-side FT8 activity involving F5NBU, decoded by SO8OO in southeastern Poland. 4,658 FT8 messages attributed to this token as transmitter, on 160m, 80m, 60m, 40m, 20m, 10m, across 33 UTC dates in the available aggregate history. Observed between 2026-07-19 and 2026-10-11.

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 4,658 FT8 messages attributed to F5NBU as the transmitting token by decoded message structure across 33 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (87%), followed by 80 m (6%) and 20 m (4%). Most decodes (59%) fell within the six-hour window 00:00-06:00 UTC. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (86%); the estimated median was +3.3 dB.

Overview

4,658

Messages attributed

UTC dates decoded

371

Active 15-min windows

+3.3 dB

Estimated median S/N

Bands

160m · 38 80m · 296 60m · 67 40m · 4,042 20m · 202 10m · 13

First attributed message: 2026-07-19
Last attributed message: 2026-10-11 17:29 UTC

Observed FT8 message patterns

Attributed sample: 4,658 messages
Active dates: 33 UTC dates
Estimated median S/N: +3.3 dB
Estimated 10th-90th percentile: -10 to +14 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 127, moderate (-15 to -9 dB) 504, strong (≥ -8 dB) 4,027.

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 F5NBU in decoded directed-looking exchanges:

KK4RXE · United States ×2 LU2DWR · Argentina RU9UC · Asiatic Russia FK8HC · New Caledonia RI1FJZ · Franz Josef Land 9Y4DG · Trinidad & Tobago BU2FW · Taiwan HK3AB · Colombia HS0ZOY · Thailand JI4POR · Japan JT1PB · Mongolia K0BFG · 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 F5NBU

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: JN28 · 2,972 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,227 km (approx.)
Last such locator decoded: 2026-10-11 17:27 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	F5NBU S/N	Counterpart	Counterpart S/N	Msgs	Capture
10-11 17:26	60m	+6 / -	A92AE	- / -21	6	✓ Closing fragment
10-10 16:33	80m	+2 / -	RG8U	- / -	5	Partial capture
10-10 06:54	60m	- / -	IK4CBO	-14 / -	3	Partial capture
10-10 06:52	60m	+1 / -	HR1JB	- / -16	4	✓ Closing fragment
10-10 06:35	40m	+4 / -	N8DH	- / -	4	Partial capture
10-10 06:31	40m	+2 / -	ZL4SA	- / -	2	Partial capture
10-10 06:25	40m	+1 / -	ZL4SA	- / -	4	Partial capture
10-10 06:07	40m	+4 / -	N2PPP	- / -	4	Partial capture
10-10 05:54	40m	+2 / -	W9KXI	- / -	2	✓ Closing fragment
10-10 05:52	40m	- / -	UR9QQ	-14 / -	2	Partial capture
10-10 05:52	40m	+6 / -	N2PPP	- / -	4	Partial capture
10-10 05:50	40m	+11 / -	AA9TL	- / -23	3	✓ Closing fragment
10-10 05:46	40m	- / -	9A4ZM	-5 / -	2	Partial capture
10-10 05:45	40m	-2 / -	YS1MS	- / -7	3	✓ Closing fragment
10-10 05:37	40m	- / -5	DK7ZT	-9 / -	3	Partial capture
10-10 05:37	40m	- / -	UR9QQ	-14 / -	2	Partial capture
10-10 05:36	40m	+4 / -	WD4OIN	- / -20	3	✓ Closing fragment
10-10 05:31	40m	+8 / -	W9BLU	- / -	4	Partial capture
10-10 05:29	40m	+6 / -	WD4OIN	- / -	2	Partial capture
10-10 05:24	40m	- / -	F4BJN	-21 / -	2	Partial capture
10-10 05:23	40m	- / -	9A4ZM	-10 / -	2	Partial capture
10-10 05:23	40m	- / -7	DK7ZT	-10 / -	4	Partial capture
10-10 05:21	40m	+3 / -	W5PID	- / -18	5	✓ Closing fragment
10-10 05:15	40m	- / -2	DK7ZT	-5 / -	3	Partial capture
10-10 05:13	40m	+2 / -	WD4ETU	- / -15	4	✓ Closing fragment
10-10 05:05	40m	-2 / -	KC2V	- / -	2	✓ Closing fragment
10-10 05:05	40m	- / -	LY4Q	-3 / -	2	Partial capture
10-10 05:04	40m	- / -	UR9QQ	-11 / -	3	Partial capture
10-10 05:03	40m	+4 / -	KJ5NGR	- / -16	3	✓ Closing fragment
10-10 04:59	40m	+12 / -	KE0MAD	- / -	4	Partial capture
10-10 04:54	40m	+12 / -	W9BLU	- / -	4	Partial capture
10-10 04:48	40m	+7 / -	WE0D	- / -13	8	Partial capture
10-10 04:47	40m	+4 / -	N5RB	- / -10	3	✓ Closing fragment
10-10 04:43	40m	-6 / -	KC1MJP	- / -11	3	✓ Closing fragment
10-10 04:34	40m	- / -	LY4Q	+1 / -	3	Partial capture
10-10 04:32	40m	- / -	UR9QQ	-9 / -	2	Partial capture
10-10 04:27	40m	- / -	F4BJN	-13 / -	3	Partial capture
10-10 04:27	40m	- / -	UR9QQ	-15 / -	3	Partial capture
10-10 04:26	40m	-16 / -	W0RLM	- / -13	2	Partial capture
10-10 04:20	40m	- / -9	GJ0KYZ	0 / -	2	Partial capture
10-10 04:19	40m	- / -	UR9QQ	-11 / -	2	Partial capture
10-10 04:19	40m	-15 / -	WB4M	- / -11	4	✓ Closing fragment
10-10 04:17	40m	-2 / -	W8BJF	- / -7	3	✓ Closing fragment
10-10 04:10	40m	-12 / -	KF8GSO	- / -	3	Partial capture
10-10 04:07	40m	-10 / -	KB5FOQ	- / -	4	Partial capture
10-10 04:07	40m	- / -	UR9QQ	-8 / -	4	Partial capture
10-10 04:06	40m	- / -	F5OYA/P	-12 / -	16	Partial capture
10-10 03:58	40m	- / -	F5OYA/P	-9 / -	3	Partial capture
10-10 03:53	40m	-18 / -	KI5DXY	- / -	4	✓ Closing fragment
10-10 03:53	40m	- / -	F4BJN	-9 / -	4	Partial capture

Recent FT8 messages decoded at SO8OO

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

60m

UTC    dB Audio  Message
205045 +18  580  9T0MD F5NBU R-17 (x2)
065200  -6 1618  HR1JB F5NBU JN28 (x4)
065415 -14 2048  F5NBU IK4CBO JN54 (x3)
172645  +5 2530  A92AE F5NBU JN28 (x6)

80m

UTC    dB Audio  Message
181130 +23 2751  CQ DX F5NBU JN28
181145 +14 2751  F5NBU SP9PLK JO90 (x9)
163315  +2 1858  RG8U F5NBU JN28 (x5)

40m

UTC    dB Audio  Message
060745  +1 1031  N2PPP F5NBU JN28 (x3)
061245 +11  587  N4CRB F5NBU JN28
062230  +1 2214  ZL4SA F5NBU JN28 (x7)
063530  +5 2282  N8DH F5NBU JN28 (x4)

160m

UTC    dB Audio  Message
220745  -6  763  RI1FJL F5NBU JN28 (x3)
203915  -3 1791  RI1FJZ F5NBU JN28 (x5)
182245 +14 2489  FK8HC F5NBU JN28 (x7)

20m

UTC    dB Audio  Message
070300  +7 2702  CQ DX F5NBU JN28
070330  +9 2702  W6IWW F5NBU RR73
070345  +3 2703  F5NBU YO4NF -11
070400 -11 1457  KP4PUA F5NBU R-12
070415  +4 2703  F5NBU YO4NF -11
070430  +1 1457  KP4PUA F5NBU R-12
070530  +2 2703  CQ DX F5NBU JN28 (x2)
070700  +4 2703  VK3HU F5NBU JN28 (x5)
070915 +10 2704  F5NBU YO4NF -03 (x2)

10m

UTC    dB Audio  Message
155915  -5 2879  CN2DX F5NBU JN28
160200  +4 2879  LU2DWR F5NBU R-12 (x2)
160345  -3 2879  LU7WDM F5NBU JN28
210030 -20 1762  MM7DAH F5NBU JN28
103915  -5 1264  YD7OHC F5NBU JN28
103945  -3  793  RU9UC F5NBU JN28 (x3)
104130 -22 1975  YC2OEI F5NBU JN28 (x3)
113815 -18 1291  JQ3ICB F5NBU JN28

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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