YU5BT — 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: JN94

Receiver-side FT8 activity involving YU5BT, decoded by SO8OO in southeastern Poland. 15 FT8 messages attributed to this token as transmitter, on 80m, 40m, across 4 UTC dates in the available aggregate history. Observed between 2026-08-23 and 2026-09-01.

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 15 FT8 messages attributed to YU5BT as the transmitting token by decoded message structure across 4 UTC dates in the available aggregate history. The largest monitored-band total was 80 m (53%), followed by 40 m (47%). In this small sample, the estimated median decoder S/N was -18 dB; no usual signal pattern is inferred.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-18 dB

Estimated median S/N

Bands

80m · 8 40m · 7

First attributed message: 2026-08-23
Last attributed message: 2026-09-01 00:21 UTC

Observed FT8 message patterns

Attributed sample: 15 messages
Active dates: 4 UTC dates
Estimated median S/N: -18 dB
S/N percentile sample: Too small
Recurring-pattern threshold: Not met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 14, moderate (-15 to -9 dB) 1, strong (≥ -8 dB) 0.

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. The sample does not meet the threshold for a recurring time or signal-pattern claim (20 attributed messages, three UTC dates and five distinct 15-minute windows).

Frequent counterpart tokens observed at SO8OO

Tokens most often paired with YU5BT in decoded directed-looking exchanges:

DL7MAW · Fed. Rep. of Germany HA7TM · Hungary OK1DXR · Czech Republic OM5CM · Slovak Republic SQ9PBV · Poland DF3IS · Fed. Rep. of Germany F4VTR · France F5PBG · France HA3TBL · Hungary HF5A · Poland OO0O · Belgium PC2J · Netherlands

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 YU5BT

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: JN94 · 5 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 640 km (approx.)
Last such locator decoded: 2026-08-28 03:54 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	YU5BT S/N	Counterpart	Counterpart S/N	Msgs	Capture
10-31 04:04	160m	- / -	DL1FLW	-4 / -	4	Partial capture
10-31 04:02	160m	- / -20	DL7MAW	-3 / -	3	✓ Closing fragment
10-31 03:58	160m	- / -24	OK1DXR	0 / -	3	✓ Closing fragment
10-31 03:57	160m	- / -24	SQ9PBV	+4 / -	2	✓ Closing fragment
10-31 03:54	160m	- / -12	HA7TM	+12 / -	2	✓ Closing fragment
10-25 02:04	80m	- / -24	UA4FKT	+3 / -	3	✓ Closing fragment
10-25 01:35	160m	- / -10	OM5CM	+13 / -	2	✓ Closing fragment
09-01 00:48	40m	- / -10	F5PBG	-2 / -	3	✓ Closing fragment
09-01 00:45	40m	- / -15	RZ6AKF	+2 / -	3	✓ Closing fragment
09-01 00:42	40m	- / -	DF3IS	-9 / -	2	✓ Closing fragment
09-01 00:39	40m	- / -11	OO0O	-2 / -	2	✓ Closing fragment
09-01 00:21	80m	-19 / -10	SP9YGD	+9 / -7	4	✓ Full exchange observed
09-01 00:18	80m	- / -	IK6GTF	-2 / -	3	Partial capture
09-01 00:17	80m	-21 / -23	IQ4JO	0 / -	4	✓ Closing observed
08-31 23:44	40m	- / -	R3PJV	-17 / -	3	✓ Closing fragment
08-31 23:42	40m	- / -7	PC2J	-2 / -	6	✓ Closing fragment
08-31 23:25	80m	- / -16	IR7MGGC	-1 / -	3	Partial capture
08-28 03:48	80m	-18 / -	HI8DX	- / -13	2	Partial capture
08-28 03:29	80m	- / -22	IQ4JO	+2 / -	6	Partial capture
08-27 15:50	40m	-18 / -2	HA3TBL	-4 / -2	4	✓ Full exchange observed
08-23 01:24	80m	-24 / -	IQ4JO	+10 / -9	2	Partial capture
08-23 00:57	40m	-18 / -18	F4VTR	-8 / -4	5	Partial capture

Recent FT8 messages decoded at SO8OO

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

160m

UTC    dB Audio  Message
013615  +9 1463  YU5BT OM5CM 73
035430 +11 2111  YU5BT HA7TM R-12 (x2)
035730  +4 2198  YU5BT SQ9PBV R-24 (x2)
035830  +0 1301  YU5BT OK1DXR JO60 (x3)
040230  +0  732  YU5BT DL7MAW JO62 (x3)
040400  -6 1503  YU5BT DL1FLW JO61 (x4)

80m

UTC    dB Audio  Message
232600  -3 1702  YU5BT IR7MGGC R-16
001715  +2 2187  YU5BT IQ4JO JN63 (x2)
001800 -21 1504  IQ4JO YU5BT RR73
001815  -2 2187  YU5BT IQ4JO 73
001845  +1 1084  YU5BT IK6GTF JN72 (x3)
002115 +10 1504  YU5BT SP9YGD JO90
002130 -19 1504  SP9YGD YU5BT -07
002145  +9 1504  YU5BT SP9YGD R-10 (x2)
020415  +6 1504  YU5BT UA4FKT LO23 (x3)

40m

UTC    dB Audio  Message
234430 -23 1904  YU5BT R3PJV KO94
234430  +1 1540  YU5BT PC2J R-07
234500 -13 1904  YU5BT R3PJV KO94
234500  -4 1539  YU5BT PC2J 73
234600 -15 1904  YU5BT R3PJV 73
003945  -2  340  YU5BT OO0O R-11 (x2)
004245  -9 1540  YU5BT DF3IS JN49 (x2)
004545  +0 1540  YU5BT RZ6AKF -15 (x3)
004815  -3 2844  YU5BT F5PBG IN78 (x3)

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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