YU4FQN — 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 YU4FQN, decoded by SO8OO in southeastern Poland. 645 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, 10m, across 52 UTC dates in the available aggregate history. Observed between 2026-06-17 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 645 FT8 messages attributed to YU4FQN as the transmitting token by decoded message structure across 52 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (67%), followed by 10 m (18%) and 20 m (9%). The busiest six-hour window was 13:00-19:00 UTC, containing 45% of decodes. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -16 dB.

Overview

645

Messages attributed

UTC dates decoded

174

Active 15-min windows

-16 dB

Estimated median S/N

Bands

80m · 37 40m · 432 20m · 59 10m · 117

First attributed message: 2026-06-17
Last attributed message: 2026-11-04 08:10 UTC

Observed FT8 message patterns

Attributed sample: 645 messages
Active dates: 52 UTC dates
Estimated median S/N: -16 dB
Estimated 10th-90th percentile: -23 to -7 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 349, moderate (-15 to -9 dB) 202, strong (≥ -8 dB) 94.

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 YU4FQN in decoded directed-looking exchanges:

OK1HEH · Czech Republic ×3 CT7AUT · Portugal ×2 ON1DGN · Belgium ×2 9A3AUH · Croatia ×2 E75C · Bosnia-Herzegovina ×2 F1PBZ · France ×2 F6FHZ · France ×2 HA7TM · Hungary ×2 IK4RVY · Italy ×2 IU3UMB · Italy ×2 RX9WM · Asiatic Russia ×2 S53AK · Slovenia ×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 YU4FQN

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 · 407 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 608 km (approx.)
Last such locator decoded: 2026-11-04 08:10 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	YU4FQN S/N	Counterpart	Counterpart S/N	Msgs	Capture
11-04 08:08	40m	-20 / -	OK1LZI	- / -	2	Partial capture
11-04 07:46	40m	-19 / -	OK1ACE	- / -	7	Partial capture
11-02 19:21	40m	- / -19	EA1EYL	-13 / -	3	Partial capture
11-02 16:40	40m	- / -8	DL1HBG	-6 / -	3	✓ Closing fragment
10-30 21:09	40m	- / -	M0IEP	-10 / -	5	Partial capture
10-30 19:17	40m	- / -26	EA5AXO	-20 / -	3	Partial capture
10-30 18:26	40m	- / -	DL5RDP	+2 / -	4	✓ Closing fragment
10-30 18:22	40m	- / -10	DL5RDP	0 / -	3	Partial capture
10-29 11:16	40m	-23 / -	UR5WEO	- / -15	5	Partial capture
10-29 10:55	40m	- / -	UR5WEO	-9 / -	3	Partial capture
10-29 09:42	40m	-24 / -9	OK1HEH	-10 / -	5	✓ Closing observed
10-29 09:23	40m	-20 / -18	SP7ENZ	-13 / -21	5	✓ Full exchange observed
10-29 09:20	40m	- / -11	UR5TOC	-9 / -	3	✓ Closing fragment
10-29 09:16	40m	- / -21	SP7ENZ	-14 / -	2	Partial capture
10-29 09:15	40m	- / -	UR5TOC	-6 / -	3	Partial capture
10-29 09:09	40m	-18 / -3	HG5OGI	-12 / -12	9	✓ Full exchange observed
10-28 23:44	40m	- / -24	EA5EE	-4 / -	2	Partial capture
10-28 16:12	40m	- / -9	F1UNR	-13 / -	3	Partial capture
10-28 14:35	40m	-12 / -6	UR5TL	+7 / -3	8	✓ Full exchange observed
10-24 21:11	40m	- / -19	2E0ROJ	-14 / -	6	✓ Closing fragment
10-24 20:24	40m	-24 / -22	UB4CLH	-14 / -16	2	Partial capture
10-24 20:22	40m	- / -1	DK7QJ	-14 / -	2	✓ Closing fragment
10-24 18:46	40m	-8 / -	OK1UVJ	-13 / -8	3	Partial capture
10-24 18:40	40m	-12 / -	EB2EMZ	- / -	5	Partial capture
10-24 18:28	40m	-6 / -	SQ4INW	- / -6	3	✓ Closing fragment
10-24 16:35	10m	-16 / -	PY5QR	- / -	3	Partial capture
10-24 15:28	10m	- / -3	EB1LA	-7 / -	4	✓ Closing fragment
10-24 13:39	10m	- / +2	K1CA	-18 / -	2	✓ Closing fragment
10-24 12:43	40m	- / -	DG7NAO	-7 / -	2	Partial capture
10-23 22:31	40m	- / -	UB4HVA	-14 / -	3	Partial capture
10-23 14:59	10m	- / -5	EA5JKM	-18 / -	2	✓ Closing fragment
10-23 09:17	40m	- / -	SV2AOB	-16 / -	4	✓ Closing fragment
10-23 08:24	40m	-16 / -12	HA4UC	-1 / -	4	✓ Closing observed
10-23 07:03	40m	-16 / -	YO5QDN	- / -10	5	Partial capture
10-23 06:42	40m	- / -	YO5QDN	-2 / -	4	Partial capture
10-22 23:46	40m	- / -	UA9SY	-12 / -	4	Partial capture
10-22 23:15	40m	- / -15	EI4LE	-4 / -	2	Partial capture
10-22 14:05	40m	- / -	DA1ST	-4 / -	18	Partial capture
10-22 13:19	40m	-17 / -14	SP6AMI	-8 / -	3	✓ Closing observed
10-22 13:17	40m	-16 / -	R3KJF	- / -12	2	Partial capture
10-22 07:28	40m	- / -	IU5WQH	-17 / -	3	✓ Closing fragment
10-21 16:37	40m	-10 / -14	OH3OJ	+7 / -	4	✓ Closing observed
10-21 00:35	40m	- / -7	UA9YFL	-16 / -	2	Partial capture
10-20 23:09	40m	- / -	PD9JPV	-22 / -	2	Partial capture
10-20 23:00	40m	- / -4	UI7N	+2 / -	2	✓ Closing fragment
10-20 22:50	40m	- / -7	F1PAR	-18 / -	3	Partial capture
10-20 22:37	40m	- / 0	G1UZL	-7 / -	3	Partial capture
10-20 22:29	40m	- / +5	UD6AWH	-11 / -	4	✓ Closing fragment
10-20 22:20	40m	- / -12	EA1CF	-17 / -	2	✓ Closing fragment
10-20 22:18	40m	- / -9	F4MVU	-8 / -	3	✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
165345 -24 1678  CQ YU4FQN KN04
191715 -15 2474  YU4FQN F4NJZ RR73
192115 -13 1282  YU4FQN EA1EYL IN81 (x3)
073345 -18 1279  CQ YU4FQN KN04
074645 -22 1541  OK1ACE YU4FQN KN04 (x7)
080830 -18 1489  OK1LZI YU4FQN KN04 (x2)

10m

UTC    dB Audio  Message
145945 -18 1891  YU4FQN EA5JKM -05 (x2)
151745 -13 1512  YU4FQN CR7BXU IN51
133930 -21 1735  YU4FQN K1CA +02 (x2)
152815  -1 1413  YU4FQN EB1LA IN73 (x4)
153715 -10 1533  YU4FQN CT7AUT 73
163130 -16 1068  PY5QR YU4FQN KN04
163300 -10 2336  W1ATV YU4FQN KN04
163530 -18 1068  PY5QR YU4FQN KN04 (x3)

80m

UTC    dB Audio  Message
234630  +4 1238  YU4FQN SP9MRP R-16 (x2)
235030  +7 2076  YU4FQN 9A3AUH R-03 (x2)
221000  +2 1476  YU4FQN YO4NF -15 (x3)
221315 -20 1504  S55X YU4FQN KN04
224530  +4 2134  YU4FQN 9A5E -21 (x3)
221330  +1 1801  YU4FQN YO3FRI -25 (x4)

20m

UTC    dB Audio  Message
132245  +4 1932  YU4FQN F5IXN 73
132345 -12 2083  YU4FQN PD9FLX JO22
132415  +7 1528  YU4FQN R6DRW KN93
132415  -7 2083  YU4FQN PD9FLX R-16
132445  +0 1528  YU4FQN R6DRW KN93
101945  +1 2030  YU4FQN GJ0KYZ IN89 (x4)
123245  -4 1778  YU4FQN PD0PWH R-04
123615 -16 2460  YU4FQN UT4QM KN77
130045  -6 1804  YU4FQN F4NPW JN26 (x4)

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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