YO8XFU — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Romania Most frequent locator attributed to this token: KN36

Receiver-side FT8 activity involving YO8XFU, decoded by SO8OO in southeastern Poland. 539 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, 10m, across 28 UTC dates in the available aggregate history. Observed between 2026-06-08 and 2026-09-04.

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 539 FT8 messages attributed to YO8XFU as the transmitting token by decoded message structure across 28 UTC dates in the available aggregate history. The largest monitored-band total was 80 m (65%), followed by 40 m (24%) and 20 m (10%). Most decodes (53%) fell within the six-hour window 16:00-22:00 UTC. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (78%); the estimated median was -1 dB.

Overview

539

Messages attributed

UTC dates decoded

Active 15-min windows

-1 dB

Estimated median S/N

Bands

80m · 351 40m · 131 20m · 54 10m · 3

First attributed message: 2026-06-08
Last attributed message: 2026-09-04 04:02 UTC

Observed FT8 message patterns

Attributed sample: 539 messages
Active dates: 28 UTC dates
Estimated median S/N: -1 dB
Estimated 10th-90th percentile: -13 to +9 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 34, moderate (-15 to -9 dB) 86, strong (≥ -8 dB) 419.

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 YO8XFU in decoded directed-looking exchanges:

RT4A · European Russia ×3 R7CD · European Russia ×2 UX7QV · Ukraine ×2 SP9YGD · Poland ×2 E75C · Bosnia-Herzegovina ×2 R2EN · European Russia ×2 YL3CW · Latvia ×2 SM7TZK · Sweden ×2 F4ACR · France LZ1EV · Bulgaria XQ1KK · Chile LY2EW · Lithuania

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 YO8XFU

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: KN36 · 264 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 543 km (approx.)
Last such locator decoded: 2026-09-04 04:02 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	YO8XFU S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-04 04:01	80m	+7 / -5	LX1TI	-3 / -	5	Partial capture
09-04 03:57	80m	-10 / -4	IU5LQC	-9 / -26	7	✓ Full exchange observed
09-04 03:52	80m	+8 / -	9A2AJ	+18 / -12	5	✓ Full exchange observed
09-04 03:47	80m	+2 / -2	S58MU	+14 / -10	5	✓ Full exchange observed
09-04 03:44	80m	+10 / -6	DO5HOK	+2 / -24	5	✓ Full exchange observed
09-04 03:42	80m	+10 / +3	IU5AWQ	+1 / -21	6	✓ Full exchange observed
09-04 03:40	80m	+5 / -7	OE9LWV	+7 / -20	5	✓ Full exchange observed
09-04 03:37	80m	-1 / -7	LA3BO	0 / -21	5	✓ Full exchange observed
09-04 03:35	80m	+2 / +1	SP9UH	+15 / -	5	Partial capture
09-04 03:34	80m	+6 / -3	YO9HP	-2 / -4	4	✓ Full exchange observed
09-04 03:32	80m	0 / -11	DL6RDE	+8 / -15	5	✓ Full exchange observed
09-04 03:31	80m	-1 / -11	DL8TV	+12 / -	3	✓ Closing observed
09-04 03:28	80m	0 / -10	OR7K	+4 / -23	4	✓ Full exchange observed
09-04 03:10	80m	+10 / -9	R2EA	-4 / -14	4	✓ Full exchange observed
09-04 03:09	80m	+4 / -10	DL5DQZ	+5 / -18	5	✓ Full exchange observed
09-04 03:06	80m	+4 / +3	IT9BYL	-8 / -24	7	✓ Full exchange observed
09-03 18:39	80m	+12 / +3	LY5W	+21 / -12	5	✓ Full exchange observed
09-03 18:38	80m	- / -	UR5RBP	+1 / -	3	Partial capture
09-03 18:37	80m	+11 / +1	YO7ZG	+9 / -	2	Partial capture
09-03 18:34	80m	+14 / +5	UT6HN	+6 / -	4	✓ Closing observed
09-03 18:30	80m	+4 / +4	YT2ZE	+2 / -18	3	✓ Full exchange observed
09-03 17:50	80m	+5 / -	UA6EU	- / -	3	Partial capture
09-03 17:46	80m	-8 / -9	RA6ATZ	+4 / -8	5	✓ Full exchange observed
09-03 17:37	80m	-6 / -2	TA1PB	-8 / -	4	✓ Closing observed
09-03 17:36	80m	+13 / +1	R2WAF	+2 / -19	5	✓ Full exchange observed
09-03 17:35	80m	- / -	OE3OOG	-4 / -	2	Partial capture
09-03 17:34	80m	+3 / -9	RA3ZOM	-4 / -21	5	✓ Full exchange observed
09-03 17:32	80m	-4 / -11	RZ6LY	-2 / -13	5	✓ Full exchange observed
09-03 17:30	80m	+2 / -3	YO4NT	+4 / -17	5	✓ Full exchange observed
08-31 12:49	20m	- / -3	PA1GUZ	+3 / -	2	✓ Closing fragment
08-31 02:10	40m	- / -13	R9CB	-18 / -	2	Partial capture
08-31 02:06	40m	- / -14	G8KHF	-7 / -	2	✓ Closing fragment
08-31 01:51	80m	- / -	PE1NPS	+2 / -	4	Partial capture
08-31 01:48	80m	0 / 0	RT4A	+7 / -14	10	✓ Full exchange observed
08-31 01:46	80m	+16 / -3	R6NA	+10 / -16	5	✓ Full exchange observed
08-31 01:17	80m	-4 / +6	YO3GNF	-6 / -15	4	✓ Full exchange observed
08-31 01:13	80m	0 / -7	DD7EE	+4 / -16	5	✓ Full exchange observed
08-31 01:11	80m	-3 / -	E75C	+9 / -15	4	✓ Closing observed
08-31 01:09	80m	-2 / -	SP1ZMO	- / -	2	Partial capture
08-31 01:07	80m	+14 / -17	LZ1EV	+20 / -18	4	✓ Full exchange observed
08-31 01:05	80m	0 / -	SP1ZMO	- / -	3	Partial capture
08-30 11:57	20m	- / -6	TC30AGU	+11 / -	5	✓ Closing fragment
08-30 10:15	40m	-5 / -10	YU4OCC	-14 / -8	5	✓ Full exchange observed
08-30 10:13	40m	-5 / +8	HG0NPJ	-2 / -2	5	✓ Full exchange observed
08-30 08:57	20m	-4 / -10	HB9DET	-10 / -	3	Partial capture
08-30 08:53	20m	- / -	IT9ECY	-7 / -	8	Partial capture
08-30 08:51	20m	- / -	F4BYA	+16 / -	3	Partial capture
08-30 05:38	20m	- / -6	UK8OM	0 / -	2	✓ Closing fragment
08-30 04:58	20m	- / +1	EK1KE	-8 / -	2	Partial capture
08-30 04:49	20m	- / -14	R4PHH	-9 / -	2	✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

80m

UTC    dB Audio  Message
035300 +19 2631  YO8XFU 9A2AJ RR73
035315  +8 2633  9A2AJ YO8XFU 73
035400  +9  991  LX1TI YO8XFU KN36
035745  -7 1878  IU5LQC YO8XFU KN36
035800 -14 1878  YO8XFU IU5LQC -04
035815  -6 1877  IU5LQC YO8XFU R-26
035830  -6 1878  YO8XFU IU5LQC RR73
035845 -15 1877  IU5LQC YO8XFU R-26
035900  -8 1878  YO8XFU IU5LQC RR73
035915 -12 1879  IU5LQC YO8XFU 73
040100  +5  991  LX1TI YO8XFU KN36 (x3)
040345  -4  990  YO8XFU LX1TI -05 (x2)

20m

UTC    dB Audio  Message
085500  -7 2150  YO8XFU IT9ECY JM78 (x4)
085645  +3 2414  SP7FID YO8XFU KN36
085745  -4 1450  HB9DET YO8XFU KN36
085800 -10 1449  YO8XFU HB9DET -10 (x2)
115700 +10  378  YO8XFU TC30AGU -06 (x5)
124945  +7 2225  YO8XFU PA1GUZ -03 (x2)

40m

UTC    dB Audio  Message
101330  -7 2441  HG0NPJ YO8XFU KN36
101345  -2 2440  YO8XFU HG0NPJ +08
101400  -5 2441  HG0NPJ YO8XFU R-02
101415  -2 2440  YO8XFU HG0NPJ RR73
101430  -4 2441  HG0NPJ YO8XFU 73
101500  -5 2375  YU4OCC YO8XFU KN36
101515 -14 2375  YO8XFU YU4OCC -10
101530  -5 2375  YU4OCC YO8XFU R-08
101545 -15 2375  YO8XFU YU4OCC RR73
101600  -6 2375  YU4OCC YO8XFU 73
020645 -11 1446  YO8XFU G8KHF -14 (x2)
021030 -17 1404  YO8XFU R9CB -13 (x2)
021315 -17 1300  YO8XFU EA5GVJ RR73

10m

UTC    dB Audio  Message
122400  -4 2177  YO8XFU IK4IDY +00
122415  -9 2178  IK4IDY YO8XFU R-04
122430  -1 2178  YO8XFU IK4IDY RR73
122445 -11 2178  IK4IDY YO8XFU 73
163100  +8  682  YO8XFU HB9GWX -21 (x2)
163300  -7 1018  YO8XFU SV2CLJ -11 (x4)
072545 -22 1438  YO8XFU R7TO 73
105100  -8 1675  YO8XFU SV2AEL RR73
113615 -11  927  YO8XFU EW7DDR -15
115200 -12 1678  YO8XFU RV6HE -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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