R5BU — 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: European Russia Most frequent locator attributed to this token: KO85

Receiver-side FT8 activity involving R5BU, decoded by SO8OO in southeastern Poland. 45 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, across 6 UTC dates in the available aggregate history. Observed between 2026-06-29 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 45 FT8 messages attributed to R5BU as the transmitting token by decoded message structure across 6 UTC dates in the available aggregate history. The largest monitored-band total was 80 m (53%), followed by 40 m (33%) and 20 m (13%). Several six-hour UTC windows tied for the largest share (100%), so no unique busiest interval is claimed. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -15 dB.

Overview

45
Messages attributed
6
UTC dates decoded
14
Active 15-min windows
-15 dB
Estimated median S/N

Bands

80m · 24 40m · 15 20m · 6
First attributed message: 2026-06-29
Last attributed message: 2026-11-04 20:04 UTC

Observed FT8 message patterns

Attributed sample
45 messages
Active dates
6 UTC dates
Estimated median S/N
-15 dB
Estimated 10th-90th percentile
-24 to -7 dB
Recurring-pattern threshold
Met

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

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 R5BU 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 R5BU

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
KO85 · 30 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
1,193 km (approx.)
Last such locator decoded
2026-11-04 20:04 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 UTCBandR5BU S/NCounterpartCounterpart S/NMsgsCapture
11-04 20:03 80m -8 / - DD0IPA - / - 3 Partial capture
11-04 20:02 80m -8 / - EW4VX - / -22 2 ✓ Closing fragment
11-04 19:54 80m -11 / - RN2F -9 / -8 2 Partial capture
11-04 19:52 80m - / -7 R7ZY -14 / - 3 ✓ Closing fragment
11-04 19:50 80m -10 / - UN0GY - / -15 2 ✓ Closing fragment
11-04 19:47 80m -14 / -5 UA1AEL -2 / - 4 ✓ Closing observed
11-04 17:51 80m -18 / - F4MUM - / - 4 Partial capture
11-04 17:47 80m -20 / - RU4CK/P - / - 2 Partial capture
11-04 17:39 80m -18 / - PA5DX - / - 2 Partial capture
11-04 17:26 80m - / - RL3QGD -15 / - 4 Partial capture
11-04 17:21 80m - / -7 RA3WY +2 / - 3 ✓ Closing fragment
11-04 16:39 40m -20 / -13 R8PG -11 / -4 7 ✓ Full exchange observed
10-31 18:19 40m -12 / - AP5ARS - / - 2 Partial capture
10-30 18:51 40m - / -14 DL3MIB -1 / - 3 ✓ Closing fragment
10-01 19:56 40m -6 / - UB3FBD - / -18 2 ✓ Closing fragment
09-19 20:03 60m - / - PI4TX -12 / - 4 Partial capture
08-09 10:40 20m - / - PE9JAN -13 / - 3 Partial capture

Recent FT8 messages decoded at SO8OO

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

80m 
UTC    dB Audio  Message
194815 -14 1503  UA1AEL R5BU 73
195045 -11 1503  UN0GY R5BU R-15 (x2)
195200 -12 1178  R5BU R7ZY KN98 (x3)
195430  -9 2420  R5BU RN2F KO04
195545 -11 1503  RN2F R5BU -08
195715 -16 1503  OK2ZAW R5BU KO85
200000 -12 1503  SV5BYP R5BU KO85
200215  -9 1502  EW4VX R5BU R-22 (x2)
200315  -7 1503  DD0IPA R5BU KO85 (x3)
40m 
UTC    dB Audio  Message
190115  -9 1540  CQ R5BU KO85
190145 -12 1540  BA4IE R5BU KO85
190445 -13 1540  OE1PHS R5BU KO85
181400  -7 1540  BG7BVI R5BU KO85
181500 -11 1540  VJ6X R5BU KO85
181930  -7 1541  AP5ARS R5BU KO85 (x2)
163900 -16 2231  R5BU R8PG -13 (x2)
164030  -9 1539  BG4UCZ R5BU KO85
164130 -12 2231  R5BU R8PG -13
164215 -17 1540  R8PG R5BU R-04 (x2)
164300  -7 2231  R5BU R8PG RR73
164315 -23 1540  R8PG R5BU 73
60m 
UTC    dB Audio  Message
200315  -9 2280  R5BU PI4TX JO22 (x4)
20m 
UTC    dB Audio  Message
104030 -12 2023  R5BU PE9JAN JO22 (x2)
104130 -19 1577  R5BU RN6MA +08
104130 -14 2023  R5BU PE9JAN JO22

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

FT8DB and SO8OO WebSDR are a hobby project maintained solo. ☕ Buy me a coffee