YU1BD — FT8 activity observed at SO8OO

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

Receiver-side FT8 activity involving YU1BD, decoded by SO8OO in southeastern Poland. 40 FT8 messages attributed to this token as transmitter, on 10m, across 7 UTC dates in the available aggregate history. Observed between 2026-07-18 and 2026-08-21.

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 40 FT8 messages attributed to YU1BD as the transmitting token by decoded message structure across 7 UTC dates in the available aggregate history. The largest monitored-band total was 10 m (100%). Most decodes (88%) fell within the six-hour window 12:00-18:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -11 dB.

Overview

40
Messages attributed
7
UTC dates decoded
13
Active 15-min windows
-11 dB
Estimated median S/N

Bands

10m · 40
First attributed message: 2026-07-18
Last attributed message: 2026-08-21 12:10 UTC

Observed FT8 message patterns

Attributed sample
40 messages
Active dates
7 UTC dates
Estimated median S/N
-11 dB
Estimated 10th-90th percentile
-17 to -6 dB
Recurring-pattern threshold
Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 7, moderate (-15 to -9 dB) 19, strong (≥ -8 dB) 14.

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 YU1BD in decoded directed-looking exchanges:

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 YU1BD

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 · 22 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
608 km (approx.)
Last such locator decoded
2026-08-21 12:08 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 UTCBandYU1BD S/NCounterpartCounterpart S/NMsgsCapture
08-26 21:15 10m - / -11 DF7EF -8 / - 3 ✓ Closing fragment
08-21 14:48 10m - / -6 HB9EFK +11 / - 2 ✓ Closing fragment
08-21 14:27 10m - / - DO1FDK -1 / - 3 Partial capture
08-21 11:21 10m - / - DL1YKQ -4 / - 5 ✓ Closing fragment
08-21 11:18 10m - / -16 E75W -10 / - 4 ✓ Closing fragment
08-20 14:10 10m - / 0 LX1JX -7 / - 2 ✓ Closing fragment
08-17 17:09 10m -10 / - CX5ABM - / -5 2 Partial capture
08-17 17:06 10m -10 / - 7X3WPL - / - 3 Partial capture
08-17 17:03 10m -13 / - LY2J - / - 2 Partial capture
08-17 16:58 10m -16 / - OZ6G - / +1 2 ✓ Closing fragment
08-17 16:56 10m -15 / - UN2E - / -14 3 ✓ Closing fragment
08-15 11:09 10m - / - IT9VCE -6 / - 3 ✓ Closing fragment
08-14 11:59 10m -7 / - YD6CDA/R - / -17 2 Partial capture
08-14 11:58 10m -8 / - IZ3EAW -6 / -11 3 ✓ Closing observed
08-12 19:45 10m - / -7 PH2M -11 / - 3 ✓ Closing fragment
08-11 17:30 10m -7 / - M0TQR - / -15 3 Partial capture
08-11 17:28 10m -10 / - G8FCQ - / -4 2 Partial capture
08-11 17:27 10m -16 / - S52BT - / - 2 Partial capture
08-09 12:14 10m -13 / - LY7TI - / - 3 Partial capture
08-09 11:28 10m - / - OE9KFV +2 / - 2 ✓ Closing fragment
08-02 17:03 10m - / -1 9K2YM -10 / - 2 ✓ Closing fragment
08-02 11:13 10m - / -9 D2ACE -10 / - 2 ✓ Closing fragment
07-30 08:32 10m - / -10 IW8PQ -13 / - 3 ✓ Closing fragment
07-25 18:55 10m - / -16 GJ0KYZ -3 / - 3 ✓ Closing fragment
07-18 17:57 10m -6 / - 9A5AJR - / -21 4 Partial capture
07-18 17:56 10m - / - RL3K -7 / - 4 Partial capture
07-18 17:54 10m -10 / - IS0UWS - / - 2 ✓ Closing fragment
07-18 16:54 10m -8 / - IS0JHW - / - 2 Partial capture
07-18 12:15 10m - / -2 F4FSY -10 / - 2 Partial capture
07-18 12:10 10m - / -5 PD0HLA -2 / - 4 ✓ Closing fragment
07-18 10:07 10m - / - R6DVV -13 / - 3 Partial capture
07-17 10:48 10m - / -10 M0SSK -14 / - 2 Partial capture

Recent FT8 messages decoded at SO8OO

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

10m 
UTC    dB Audio  Message
112215  -3 2326  YU1BD DL1YKQ JN67 (x4)
114645 -22 1323  TK4TH YU1BD KN04 (x2)
121045  -2 2559  DG9XN YU1BD +05
142730  +0 2949  YU1BD DO1FDK JO41 (x3)
144815 +12 2495  YU1BD HB9EFK -06 (x2)
211530  -9  460  YU1BD DF7EF JO30 (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.

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