YU4BPC — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Serbia Most frequent locator attributed to this token: KN03

Receiver-side FT8 activity involving YU4BPC, decoded by SO8OO in southeastern Poland. 143 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, 10m, across 11 UTC dates in the available aggregate history. Observed between 2026-06-07 and 2026-09-08.

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 143 FT8 messages attributed to YU4BPC as the transmitting token by decoded message structure across 11 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (57%), followed by 40 m (29%) and 10 m (13%). Several six-hour UTC windows tied for the largest share (64%), so no unique busiest interval is claimed. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (74%); the estimated median was +2 dB.

Overview

143

Messages attributed

UTC dates decoded

Active 15-min windows

+2 dB

Estimated median S/N

Bands

80m · 2 40m · 41 20m · 82 10m · 18

First attributed message: 2026-06-07
Last attributed message: 2026-09-08 05:39 UTC

Observed FT8 message patterns

Attributed sample: 143 messages
Active dates: 11 UTC dates
Estimated median S/N: +2 dB
Estimated 10th-90th percentile: -11 to +10 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 6, moderate (-15 to -9 dB) 31, strong (≥ -8 dB) 106.

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 YU4BPC in decoded directed-looking exchanges:

DN9AD · Fed. Rep. of Germany DN9ESA · Fed. Rep. of Germany RV6HE · European Russia TN8GD · Republic of the Congo R4ADD · European Russia TM8WWA · France V31DL · Belize PV8AJ · Brazil VJ6X · Australia

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 YU4BPC

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: KN03 · 105 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 718 km (approx.)
Last such locator decoded: 2026-09-08 05:39 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	YU4BPC S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-08 05:37	40m	+1 / -	KS4OT	- / -	5	Partial capture
09-08 05:32	40m	-4 / -	PV8AJ	- / -15	7	✓ Closing fragment
09-08 05:29	40m	0 / -	HK3TY	- / -	3	Partial capture
07-30 06:02	20m	- / -12	V31DL	-13 / -	2	✓ Closing fragment
07-30 06:01	20m	- / -7	R4ADD	-7 / -	2	✓ Closing fragment
07-29 17:06	10m	-10 / -	DN9ESA	- / -15	4	✓ Closing fragment
07-29 16:56	10m	-11 / -	TN8GD	- / -	3	✓ Closing fragment
07-29 16:52	10m	-10 / -	CE2SV	- / -4	3	Partial capture
07-24 21:01	40m	-10 / -	YU5DR	- / -	4	Partial capture
07-23 19:46	40m	-8 / -	VJ6X	- / -	4	✓ Closing fragment
07-23 19:43	40m	-10 / -	YD2VMF	- / -	4	Partial capture
07-21 14:06	10m	-8 / -	EW8GT	- / -	4	Partial capture
07-21 14:02	10m	-7 / -	TK5K	-11 / -	2	Partial capture
07-05 11:01	10m	- / -8	II5WWA	-10 / -	3	Partial capture
06-30 19:43	20m	-18 / 0	CR2WWA	-16 / -	2	Partial capture
06-30 19:40	20m	-16 / -	TM8WWA	-22 / -16	4	✓ Closing observed

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
052915  -2 2336  HK3TY YU4BPC KN03 (x3)
053230 -11  847  PV8AJ YU4BPC KN03 (x7)
053715  -6  847  KS4OT YU4BPC KN03 (x5)

20m

UTC    dB Audio  Message
193900  -8 2275  LU5EW YU4BPC KN03
194030 -15 1403  TM8WWA YU4BPC KN03 (x2)
194115 -22 1403  YU4BPC TM8WWA RR73
194130 -17 1404  TM8WWA YU4BPC 73
194215 -18 2046  YU4BPC EC3A -14
194315 -18 1880  CR2WWA YU4BPC KN03
194400 -16 1880  YU4BPC CR2WWA +00 (x2)
060100  -6  861  YU4BPC R4ADD -07 (x2)
060200 -11  920  YU4BPC V31DL -12 (x2)
161445 -16  882  9W2DX YU4BPC KN03
074445  -3  883  WA4FU YU4BPC KN03

10m

UTC    dB Audio  Message
165230  -9 2598  CE2SV YU4BPC KN03 (x3)
165615 -11  908  TN8GD YU4BPC KN03 (x3)
170245 -11  703  LW2EDM YU4BPC R-13
170315 -16 2433  DN9AD YU4BPC RR73
170615 -11  705  DN9ESA YU4BPC -15 (x4)
171615 -18 1196  EU1CZ YU4BPC KN03
070100 -20 2154  YU4BPC RV6HE RR73
074115 -17 2213  YU4BPC F4IDN IN97

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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