OH3BU — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Finland Most frequent locator attributed to this token: KP20

Receiver-side FT8 activity involving OH3BU, decoded by SO8OO in southeastern Poland. 30 FT8 messages attributed to this token as transmitter, on 80m, across 2 UTC dates in the available aggregate history. Observed between 2026-09-01 and 2026-09-16.

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 30 FT8 messages attributed to OH3BU as the transmitting token by decoded message structure across 2 UTC dates in the available aggregate history. The largest monitored-band total was 80 m (100%). In this small sample, the estimated median decoder S/N was -3 dB; no usual signal pattern is inferred.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-3 dB

Estimated median S/N

Bands

80m · 30

First attributed message: 2026-09-01
Last attributed message: 2026-09-16 16:14 UTC

Observed FT8 message patterns

Attributed sample: 30 messages
Active dates: 2 UTC dates
Estimated median S/N: -3 dB
Estimated 10th-90th percentile: -18 to +4 dB
Recurring-pattern threshold: Not met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 6, moderate (-15 to -9 dB) 5, strong (≥ -8 dB) 19.

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 OH3BU in decoded directed-looking exchanges:

DL6CM · Fed. Rep. of Germany M6XZD · England OH1LWZ · Finland PI4DX · Netherlands R3BDQ · European Russia RA2FU · Kaliningrad RC2Y · European Russia RN6HK · European Russia SP6FME · Poland YO4NT · Romania

Most frequent locator attributed to OH3BU

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: KP20 · 12 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,192 km (approx.)
Last such locator decoded: 2026-09-16 16:14 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	OH3BU S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-16 16:08	80m	-18 / -19	DL6CM	+4 / 0	5	✓ Full exchange observed
09-16 16:06	80m	-19 / -	EU6KA	- / -8	2	Partial capture
09-01 18:57	80m	-3 / -	OM2WW	- / -	2	Partial capture
09-01 18:49	80m	-12 / -	YT1T	- / -	2	Partial capture
09-01 18:47	80m	-14 / -	M6XZD	- / -15	3	✓ Closing fragment
09-01 18:45	80m	+4 / +10	PI4DX	+6 / -	3	✓ Closing observed
09-01 18:43	80m	-11 / -	OH1LWZ	+2 / -	2	✓ Closing observed
09-01 18:42	80m	-16 / -	R3BDQ	+9 / -5	2	✓ Closing observed
09-01 18:40	80m	- / -23	LZ2VQ	+2 / -	2	Partial capture
09-01 18:36	80m	-2 / -4	SP6FME	+6 / -8	5	✓ Full exchange observed
09-01 18:36	80m	-4 / -9	RN6HK	-16 / -9	3	✓ Full exchange observed
09-01 18:33	80m	+3 / -	RC2Y	- / -7	5	✓ Closing fragment
09-01 18:32	80m	+1 / -4	YO4NT	+2 / -5	4	✓ Full exchange observed
09-01 18:31	80m	+2 / +8	RA2FU	-7 / -13	6	✓ Full exchange observed

Recent FT8 messages decoded at SO8OO

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

80m

UTC    dB Audio  Message
184745 -14 1781  M6XZD OH3BU R-15 (x2)
184915 -15 1781  YT1T OH3BU KP20 (x2)
185730  -4 1790  OM2WW OH3BU KP20 (x2)
160600 -18 1401  EU6KA OH3BU KP20 (x2)
160845  +4 1052  OH3BU DL6CM JO61
160900 -19 1401  DL6CM OH3BU +00
160915  +1 1052  OH3BU DL6CM R-19
160930 -18 1400  DL6CM OH3BU RR73
160945  +6 1052  OH3BU DL6CM 73
161415  -3 1400  RI1FJZ OH3BU KP20
161445  -3 1400  EX7DY OH3BU KP20

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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