CR7BUJ — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Portugal Most frequent locator attributed to this token: IM58

Receiver-side FT8 activity involving CR7BUJ, decoded by SO8OO in southeastern Poland. 6,522 FT8 messages attributed to this token as transmitter, on 40m, 20m, 10m, across 69 UTC dates in the available aggregate history. Observed between 2026-06-06 and 2026-08-25.

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 6,522 FT8 messages attributed to CR7BUJ as the transmitting token by decoded message structure across 69 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (99%), followed by 40 m (1%) and 10 m (0%). Most decodes (55%) fell within the six-hour window 17:00-23:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -14 dB.

Overview

6,522

Messages attributed

UTC dates decoded

653

Active 15-min windows

-14 dB

Estimated median S/N

Bands

40m · 58 20m · 6,461 10m · 3

First attributed message: 2026-06-06
Last attributed message: 2026-08-25 18:00 UTC

Observed FT8 message patterns

Attributed sample: 6,522 messages
Active dates: 69 UTC dates
Estimated median S/N: -14 dB
Estimated 10th-90th percentile: -19 to -4 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 2,335, moderate (-15 to -9 dB) 2,735, strong (≥ -8 dB) 1,452.

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 CR7BUJ in decoded directed-looking exchanges:

IK4LZH · Italy ×9 M9VVE · England ×5 DG5PW · Fed. Rep. of Germany ×5 TA2ED · Asiatic Turkey ×4 IW5ALZ · Italy ×4 TM2WWA · France ×4 DL6ZOG · Fed. Rep. of Germany ×3 DK7SB · Fed. Rep. of Germany ×3 F1PBZ · France ×3 DF8RU · Fed. Rep. of Germany ×3 F4HSB · France ×3 DL1GLO · Fed. Rep. of Germany ×2

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 CR7BUJ

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: IM58 · 4,760 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 2,737 km (approx.)
Last such locator decoded: 2026-08-25 18:00 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	CR7BUJ S/N	Counterpart	Counterpart S/N	Msgs	Capture
08-26 18:44	10m	- / -15	CT3MD	-10 / -	4	✓ Closing fragment
08-25 17:56	20m	-10 / -	<...>	- / -12	2	Partial capture
08-25 17:53	20m	-6 / -	OE3VIA	- / -11	4	✓ Closing fragment
08-25 17:46	20m	- / -	R9FFZ	-6 / -	2	Partial capture
08-25 17:35	20m	- / -6	MW7RHR	-7 / -	2	Partial capture
08-25 17:30	20m	-5 / -	YO2LFP	- / -8	2	✓ Closing fragment
08-25 17:25	20m	-14 / -4	IK0QDM	-3 / -5	7	✓ Full exchange observed
08-25 17:25	20m	-6 / -15	M9VVE	+1 / -11	11	✓ Full exchange observed
08-25 17:07	20m	- / -	ON4AP	-6 / -	2	Partial capture
08-25 17:04	20m	-12 / -	R2BEX	-22 / -10	5	Partial capture
08-25 16:53	20m	-10 / -	HA7CH	- / -16	3	Partial capture
08-25 16:51	20m	-10 / -	IK1AQI	- / -12	3	✓ Closing fragment
08-25 16:38	20m	-11 / -	IN3GHP	- / -9	2	Partial capture
08-25 16:29	20m	- / +2	EB3EKZ	-10 / -	3	✓ Closing fragment
08-25 16:25	20m	- / -17	EI4HH	-10 / -	2	✓ Closing fragment
08-25 16:06	20m	-5 / -9	F5LPL	+1 / -10	4	✓ Full exchange observed
08-25 16:02	20m	-4 / -8	EI4HH	-5 / -14	5	✓ Full exchange observed
08-25 16:00	20m	-5 / -	ON2CB	- / -10	2	✓ Closing fragment
08-25 15:53	20m	-16 / -	F4AAS/P	- / -14	2	✓ Closing fragment
08-25 15:41	20m	-7 / -	DH1NGL	- / -7	5	✓ Closing fragment
08-25 15:38	20m	-5 / -	IU3RTD	- / -15	3	✓ Closing fragment
08-25 15:34	20m	-10 / +5	F1BHB	+8 / -11	10	✓ Full exchange observed
08-25 15:26	20m	-2 / -	HB9NBN	- / -14	2	✓ Closing fragment
08-25 15:24	20m	-6 / -	F6KIM	- / -6	2	✓ Closing fragment
08-25 15:21	20m	-5 / -	SP4DIS	- / -13	2	✓ Closing fragment
08-25 15:18	20m	-7 / -	SP5RFL	- / -21	2	✓ Closing fragment
08-25 15:15	20m	-7 / -	OH1TD	- / -11	3	✓ Closing fragment
08-25 14:56	20m	-10 / -	HB9HRR	- / -8	2	✓ Closing fragment
08-25 14:45	20m	- / -10	G4EBY	+3 / -	3	✓ Closing fragment
08-25 14:38	20m	- / +4	M0BOB	-10 / -	2	Partial capture
08-25 14:29	20m	-14 / -	MI0UFT	- / -12	2	✓ Closing fragment
08-25 14:19	20m	-13 / -	SP5SE	- / -16	2	✓ Closing fragment
08-25 14:17	20m	-16 / -	F4HTL	-1 / -11	3	✓ Closing observed
08-25 14:16	20m	- / -	MW7RHR	-13 / -	2	Partial capture
08-25 13:52	20m	-13 / -	ON2AJ	-8 / -18	5	✓ Closing observed
08-25 13:45	20m	-12 / -6	G7EVY	+5 / -	4	✓ Closing observed
08-25 13:40	20m	-3 / -	G4TGV	- / -7	2	✓ Closing fragment
08-25 13:40	20m	- / -11	M9VVE	+8 / -	8	Partial capture
08-25 13:33	20m	- / -	PA5TOM	-17 / -	3	Partial capture
08-25 13:31	20m	-9 / -	G4TGV	-12 / -8	3	✓ Closing observed
08-25 13:29	20m	-10 / -	G4WJJ	- / -16	2	✓ Closing fragment
08-25 13:26	20m	-11 / -11	M9VVE	+9 / -16	16	✓ Full exchange observed
08-25 13:00	20m	- / -	F8EFJ	0 / -	3	Partial capture
08-25 12:51	20m	- / +3	M7NJI	-21 / -	3	✓ Closing fragment
08-25 12:42	20m	- / -10	IK2JBY	0 / -	2	✓ Closing fragment
08-25 12:23	20m	- / -	PA0ABG	-12 / -	4	Partial capture
08-25 12:21	20m	- / -5	M8CMG	-15 / -	3	✓ Closing fragment
08-25 12:05	20m	-14 / -21	PA1FMR	-12 / -	4	✓ Closing observed
08-25 12:01	20m	-21 / -18	F5IRQ	-3 / -	6	✓ Closing observed
08-25 11:43	20m	-13 / -13	M0PFX	-6 / -16	7	✓ Full exchange observed

Recent FT8 messages decoded at SO8OO

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

10m

UTC    dB Audio  Message
213900 -13 1358  CR7BUJ DN9CHV JO31 (x6)
214630 -13 1295  CR7BUJ HB3YQY -08 (x2)
154300 -17 2387  CR7BUJ SV1PLR KM17 (x3)
184400 -10  997  CR7BUJ CT3MD IM13 (x4)

20m

UTC    dB Audio  Message
175115  -5 1207  CQ CR7BUJ IM58 (x4)
175315  -8 1207  OE3VIA CR7BUJ -11 (x3)
175445  -9 1207  CQ CR7BUJ IM58 (x2)
175545  -5 1207  OE3VIA CR7BUJ IM58
175615 -14 1207  <...> CR7BUJ IM58
175630  -1 1756  CR7BUJ IR7MGGC +00
175645  -5 1207  <...> CR7BUJ R-12
175845  -6 1208  PD1PSR CR7BUJ -17
180045  -7 1207  CQ CR7BUJ IM58

40m

UTC    dB Audio  Message
211815  +4 2725  CR7BUJ DK5UR RR73
203400 -14 1181  CR7BUJ SE2P KP04 (x2)
224545 -17 1754  CR7BUJ UT7IA KN88 (x8)
225245  -9  439  CR7BUJ IK4LZH R-08
225345 -16 1145  CR7BUJ DM2BM JO54
182845 -10 1096  CR7BUJ DL5ASK -09
231515 -15 1185  UN7LEW CR7BUJ IM58

80m

UTC    dB Audio  Message
214615  -3 1007  CR7BUJ TM2WWA -10 (x2)
215945 +13  311  CR7BUJ HB9EFK -19 (x3)
220700 -24 1551  CR7BUJ MW0BYS -16 (x2)
221030  -4 2156  CR7BUJ TF4M -11 (x2)
221130 -11 2156  CR7BUJ RR73; DK4CN <...> +00
213330 -13 1732  CR7BUJ CR5VP -08 (x3)
201945 -10 1027  CR7BUJ CT3MD -12
203045 -14 1495  CR7BUJ CT2JMP 73

160m

UTC    dB Audio  Message
190430  +2 2556  CR7BUJ SQ9DJQ -06 (x8)

60m

UTC    dB Audio  Message
211845  -6 1442  CR7BUJ ON7GB JO21 (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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