YU1JF — reception at SO8OO

Signals decoded by SO8OO in southeastern Poland. FT8 and CW have separate histories; all times are UTC.

FT8 activity

DXCC entity inferred from callsign: Serbia Most frequent locator attributed to this token: KN04

Receiver-side FT8 activity involving YU1JF, decoded by SO8OO in southeastern Poland. 54 FT8 messages attributed to this token as transmitter, on 80m, 40m, 10m, across 4 UTC dates in the available aggregate history. Observed between 2026-06-25 and 2026-11-04.

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 54 FT8 messages attributed to YU1JF as the transmitting token by decoded message structure across 4 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (74%), followed by 80 m (22%) and 10 m (4%). Several six-hour UTC windows tied for the largest share (61%), so no unique busiest interval is claimed. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -10 dB.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-10 dB

Estimated median S/N

Bands

80m · 12 40m · 40 10m · 2

First attributed message: 2026-06-25
Last attributed message: 2026-11-04 05:42 UTC

Observed FT8 message patterns

Attributed sample: 54 messages
Active dates: 4 UTC dates
Estimated median S/N: -10 dB
Estimated 10th-90th percentile: -18 to -5 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 6, moderate (-15 to -9 dB) 26, strong (≥ -8 dB) 22.

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 YU1JF in decoded directed-looking exchanges:

YO6LM · Romania ×2 DN9DSP · Fed. Rep. of Germany M0BEW · England SV1PLR · Greece DL3RAJ · Fed. Rep. of Germany F4HSB · France OK2FKU · Czech Republic PA0WDN · Netherlands R6ZEJ · European Russia RN6MA · European Russia SP5MIG · Poland SQ6FHD · Poland

Most frequent locator attributed to YU1JF

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: KN04 · 15 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 608 km (approx.)
Last such locator decoded: 2026-11-04 05:42 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	YU1JF S/N	Counterpart	Counterpart S/N	Msgs	Capture
11-04 05:38	40m	-11 / -12	R6ZEJ	-13 / -8	7	✓ Full exchange observed
11-04 05:36	40m	-13 / -	SP5MIG	- / -7	2	✓ Closing fragment
11-04 05:35	40m	- / -	IU2THY	+11 / -	3	Partial capture
11-04 05:32	40m	-10 / -13	UA3ADE	+2 / -4	4	✓ Full exchange observed
11-04 05:14	40m	- / -7	TC8TR	-10 / -	2	Partial capture
11-03 05:50	40m	-11 / -	UA4FKT	+4 / 0	2	✓ Closing observed
11-03 05:48	40m	-10 / -8	DL3RAJ	-2 / -3	5	✓ Full exchange observed
11-03 05:47	40m	- / -10	GJ0KYZ	+6 / -	2	Partial capture
11-03 05:45	40m	-7 / -	UR5CD	-1 / -	4	✓ Closing observed
11-03 05:42	40m	-10 / -	HB9EKJ	- / -19	2	Partial capture
11-03 05:39	40m	-7 / -12	YO6LM	+17 / -	4	✓ Closing observed
11-03 05:37	40m	- / -	F4BYA	+4 / -	3	Partial capture
11-03 05:37	40m	- / -	IU8RFW	-5 / -	2	Partial capture
11-03 05:34	40m	-2 / -	DA0M	-18 / -20	3	Partial capture
11-03 05:33	40m	- / -12	UR3LM	+4 / -	2	✓ Closing fragment
11-03 05:30	40m	-8 / -	OK2FKU	- / -	2	✓ Closing fragment
11-03 05:29	40m	- / -	IN3WZS	+2 / -	7	Partial capture
11-03 05:28	40m	-10 / -	US3EW	- / -14	2	✓ Closing fragment
11-03 05:25	40m	- / -9	OH6IH	-9 / -	2	Partial capture
11-03 05:25	40m	- / -	UA4FKT	-4 / -	2	Partial capture
11-03 05:25	40m	-8 / -	US3EW	-13 / -4	3	✓ Closing observed
11-03 05:24	40m	-12 / -	TC5ATA	-15 / -3	3	✓ Closing observed
11-03 05:23	40m	-8 / -	F4HSB	- / -7	2	✓ Closing fragment
11-03 05:20	40m	- / -16	OH6IH	-11 / -	3	Partial capture
11-03 05:03	40m	- / -	RA5AD	-4 / -	2	Partial capture
11-03 04:54	40m	- / +1	SV5BYP	-5 / -	2	✓ Closing fragment
10-26 19:36	40m	- / -17	RN6MA	-6 / -	2	✓ Closing fragment
10-26 19:16	40m	- / -	F4BYA	+12 / -	3	Partial capture
10-26 19:10	40m	- / -	RZ4FWA	-12 / -	2	Partial capture
10-26 19:09	40m	- / -	F4BYA	+11 / -	6	Partial capture
10-26 19:04	40m	- / -4	PA0WDN	-13 / -	2	✓ Closing fragment
10-21 17:35	80m	-9 / -	TA4SSK	- / -17	2	Partial capture
10-21 17:29	80m	-5 / -	RN6LBT	- / -	2	Partial capture
10-21 17:27	80m	- / -	HF5A	-1 / -	2	Partial capture
10-21 17:27	80m	-5 / -7	IQ4JO	+2 / +2	4	✓ Full exchange observed
10-21 17:24	80m	-8 / +8	OK2UPG	+20 / -4	5	✓ Full exchange observed
10-21 17:21	80m	- / -7	DK7ZT	+7 / -	3	✓ Closing fragment
10-21 17:20	80m	- / -6	9A4ZM	+7 / -	3	✓ Closing fragment
10-21 17:19	80m	-14 / -11	SV9MBH	-22 / -	2	✓ Closing observed
10-21 17:17	80m	-20 / -4	E70SZ	+4 / -	4	✓ Full exchange observed
10-21 17:12	80m	- / -6	LZ9DX	-20 / -	2	Partial capture
10-21 17:07	80m	- / -17	DK7ZT	+5 / -	5	Partial capture
10-21 17:05	80m	- / -4	IK8YFU	-13 / -	2	Partial capture
10-21 16:27	40m	-13 / -12	RX6LMA	-13 / +3	4	Partial capture
10-21 16:25	40m	-14 / -	DL9KM	-9 / +3	8	Partial capture
10-17 11:27	10m	- / +9	F1PBZ	-8 / -	2	Partial capture
08-22 10:15	10m	- / -1	M0BEW	-10 / -	2	✓ Closing fragment
08-12 15:56	10m	- / -15	DD7MK	-9 / -	2	Partial capture

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
053430 -12 1355  UA3ADE YU1JF 73
053530 -12 1355  CQ YU1JF KN04
053545 +15 2752  YU1JF IU2THY JN45 (x2)
053630 -14 1355  SP5MIG YU1JF -07
053645  +9 2751  YU1JF IU2THY JN45
053730 -12 1355  SP5MIG YU1JF RR73
053815 -16  885  YU1JF R6ZEJ KN98 (x2)
053900 -12 1355  R6ZEJ YU1JF -08
053915 -10  885  YU1JF R6ZEJ R-12 (x2)
054000 -10 1355  R6ZEJ YU1JF RR73
054015 -11  885  YU1JF R6ZEJ 73
054200 -12 1355  CQ YU1JF KN04

80m

UTC    dB Audio  Message
172430 -11 1700  OK2UPG YU1JF -04
172445 +24  737  YU1JF OK2UPG R+08
172500  -4 1700  OK2UPG YU1JF RR73
172515 +16  737  YU1JF OK2UPG 73
172700  -8 1700  CQ YU1JF KN04
172715  -1 2092  YU1JF IQ4JO JN63
172715  -5 2493  YU1JF HF5A JO92
172730  -5 1700  IQ4JO YU1JF +02
172745  +3 2092  YU1JF IQ4JO R-07
172745  +3 2493  YU1JF HF5A JO92
172815  +5 2092  YU1JF IQ4JO 73
172915  -6 1700  RN6LBT YU1JF KN04 (x2)
173515  -7 1700  TA4SSK YU1JF R-17 (x2)

10m

UTC    dB Audio  Message
155630  -7  644  YU1JF DD7MK -15 (x2)
161115 -18 2127  YU1JF SV1PLR RR73
101400 -16 1284  YU1JF DN9DSP RR73
101500 -11 1345  YU1JF M0BEW -01 (x2)
101600 -16 1322  YU1JF DO5PY JN49
112700  -5 2737  YU1JF F1PBZ +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.

CW

No CW receptions recorded for this callsign in the last 30 days.

Explore CW reception at SO8OO

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