YO5BAK — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Romania Most frequent locator attributed to this token: KN07

Receiver-side FT8 activity involving YO5BAK, decoded by SO8OO in southeastern Poland. 19 FT8 messages attributed to this token as transmitter, on 80m, 40m, across 3 UTC dates in the available aggregate history. Observed between 2026-07-13 and 2026-08-02.

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 19 FT8 messages attributed to YO5BAK as the transmitting token by decoded message structure across 3 UTC dates in the available aggregate history. The largest monitored-band total was 80 m (89%), followed by 40 m (11%). In this small sample, the estimated median decoder S/N was +14 dB; no usual signal pattern is inferred.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

+14 dB

Estimated median S/N

Bands

80m · 17 40m · 2

First attributed message: 2026-07-13
Last attributed message: 2026-08-02 22:44 UTC

Observed FT8 message patterns

Attributed sample: 19 messages
Active dates: 3 UTC dates
Estimated median S/N: +14 dB
S/N percentile sample: Too small
Recurring-pattern threshold: Not met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 0, moderate (-15 to -9 dB) 2, strong (≥ -8 dB) 17.

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 YO5BAK in decoded directed-looking exchanges:

UA4FKT · European Russia ×2 DL1JAT · Fed. Rep. of Germany G0JEI · England RD7LC · European Russia YL3NU · Latvia M1DBW · England LA1AAA · Norway PD0IFI · Netherlands G8OO · England OH5KNL · Finland

Most frequent locator attributed to YO5BAK

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: KN07 · 10 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 277 km (approx.)
Last such locator decoded: 2026-08-02 22:40 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	YO5BAK S/N	Counterpart	Counterpart S/N	Msgs	Capture
08-02 22:42	80m	+12 / -10	G8OO	-8 / 0	6	✓ Full exchange observed
08-02 22:42	80m	+12 / +1	UA4FKT	+8 / -	7	✓ Full exchange observed
08-02 22:40	80m	+8 / +8	YO1BRANCUSI	+1 / +10	3	Partial capture
07-21 22:32	40m	- / -	UA4FKT	-6 / -	3	✓ Closing fragment
07-21 22:24	80m	+20 / +7	DD0AM	0 / -2	3	Partial capture
07-21 22:22	80m	+20 / -	SD9W	- / -	3	Partial capture
07-21 22:20	80m	+17 / +10	OH5KNL	+2 / -	5	✓ Full exchange observed
07-21 22:19	80m	+14 / -4	EA8UP	-12 / -6	3	Partial capture
07-20 06:58	10m	- / -7	RD7LC	-12 / -	2	✓ Closing fragment
07-20 06:57	10m	- / -4	G0JEI	-10 / -	2	✓ Closing fragment
07-13 21:52	40m	-12 / -	9M2RSI	- / -	2	Partial capture
07-12 09:17	10m	- / -10	DL1JAT	-15 / -	2	✓ Closing fragment
07-02 08:49	10m	- / -7	R7DX	-20 / -	2	Partial capture

Recent FT8 messages decoded at SO8OO

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

20m

UTC    dB Audio  Message
142915 -14 1869  YO5BAK M1DBW RR73

80m

UTC    dB Audio  Message
224100  +1 1780  YO5BAK YO1BRANCUSI +08
224115 +10 1780  YO1BRANCUSI YO5BAK R+10
224200  +5 1780  YO5BAK UA4FKT LO23
224200  -7  225  YO5BAK G8OO JO02
224230  +7 1780  YO5BAK UA4FKT LO23
224230  -6  225  YO5BAK G8OO JO02
224245 +10 1780  G8OO YO5BAK +00
224300  -9  225  YO5BAK G8OO R-10
224315 +14 1780  G8OO YO5BAK RR73
224330  +8 1781  YO5BAK UA4FKT LO23
224330 -11  225  YO5BAK G8OO 73
224345 +14 1780  UA4FKT YO5BAK +16
224400 +10 1781  YO5BAK UA4FKT R+01
224415 +11 1780  UA4FKT YO5BAK RR73
224430  +8 1781  YO5BAK UA4FKT 73

40m

UTC    dB Audio  Message
215215 -12  945  9M2RSI YO5BAK KN07 (x2)
223245 -13 2126  YO5BAK UA4FKT LO23 (x2)
223315  -9  950  YO5BAK PD0IFI JO32
223345  +0 2126  YO5BAK UA4FKT 73
223615  -6  950  YO5BAK PD0IFI 73
224030  -4 2469  YO5BAK LA1AAA RR73
224100 -10  597  YO5BAK DK8HC JO42

10m

UTC    dB Audio  Message
084800 -22 1983  YO5BAK YL3NU RR73
084900 -22 1816  YO5BAK R7DX KN84 (x2)
091700 -15 1193  YO5BAK DL1JAT R-10 (x2)
065730 -11  833  YO5BAK G0JEI -04 (x2)
065830 -12  834  YO5BAK RD7LC -07 (x2)

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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