YO9SW — 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: Romania Most frequent locator attributed to this token: KN23

Receiver-side FT8 activity involving YO9SW, decoded by SO8OO in southeastern Poland. 40 FT8 messages attributed to this token as transmitter, on 40m, 20m, across 2 UTC dates in the available aggregate history. Observed between 2026-07-05 and 2026-11-01.

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 YO9SW as the transmitting token by decoded message structure across 2 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (75%), followed by 20 m (25%). In this small sample, the estimated median decoder S/N was -1 dB; no usual signal pattern is inferred.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-1 dB

Estimated median S/N

Bands

40m · 30 20m · 10

First attributed message: 2026-07-05
Last attributed message: 2026-11-01 06:11 UTC

Observed FT8 message patterns

Attributed sample: 40 messages
Active dates: 2 UTC dates
Estimated median S/N: -1 dB
Estimated 10th-90th percentile: -10 to +3 dB
Recurring-pattern threshold: Not met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 0, moderate (-15 to -9 dB) 5, strong (≥ -8 dB) 35.

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 YO9SW in decoded directed-looking exchanges:

EU4U · Belarus F5PBG · France IK4JPP · Italy IQ0AK · Sardinia R5AV · European Russia TA1MB · European Turkey UR9QQ · Ukraine UT8SQ · Ukraine YO2MKE · Romania

Most frequent locator attributed to YO9SW

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: KN23 · 17 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 756 km (approx.)
Last such locator decoded: 2026-11-01 06:11 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	YO9SW S/N	Counterpart	Counterpart S/N	Msgs	Capture
11-01 06:15	40m	- / -4	YO2CK	+9 / -	6	Partial capture
11-01 06:11	40m	0 / +5	IZ5WTV	-2 / -	5	Partial capture
11-01 06:08	40m	+3 / -	EU4U	- / -17	3	✓ Closing fragment
11-01 06:03	40m	-1 / +2	IK4JPP	-3 / -12	3	✓ Full exchange observed
11-01 06:02	40m	-4 / -	YO2MKE	- / 0	2	✓ Closing fragment
11-01 06:02	40m	- / -	IK2TCV	0 / -	3	Partial capture
11-01 06:01	40m	-2 / -	UT8SQ	- / -9	2	✓ Closing fragment
11-01 06:00	40m	-1 / -	UR9QQ	-11 / -	2	✓ Closing observed
11-01 05:59	40m	+3 / -	TA1MB	- / -13	2	✓ Closing fragment
11-01 05:59	40m	- / -	PE1NPS	-2 / -	4	Partial capture
11-01 05:57	40m	+2 / -	F5PBG	- / -17	2	✓ Closing fragment
11-01 05:56	40m	+2 / +2	R5AV	-4 / -8	3	✓ Full exchange observed
11-01 05:43	40m	-3 / -	V31DL	- / -	8	Partial capture
11-01 05:37	40m	- / -	IU8RFW	+7 / -	5	Partial capture
11-01 05:36	40m	-3 / -	IQ0AK	- / -10	3	✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
060830  +1 2049  EU4U YO9SW KN23 (x3)
060945 -12 2049  YO9SW LZ2VQ KN23
061115  +0 2049  IZ5WTV YO9SW KN23
061130  +2 2300  YO9SW IZ5WTV +05 (x4)
061515  +9 1131  YO9SW YO2CK -04 (x6)

CW

No CW receptions recorded for this callsign in the last 30 days.

Explore CW reception at SO8OO

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