YO9FUL — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Romania Most frequent locator attributed to this token: KN34

Receiver-side FT8 activity involving YO9FUL, decoded by SO8OO in southeastern Poland. 122 FT8 messages attributed to this token as transmitter, on 40m, 20m, across 5 UTC dates in the available aggregate history. Observed between 2026-07-24 and 2026-09-13.

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 122 FT8 messages attributed to YO9FUL as the transmitting token by decoded message structure across 5 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (87%), followed by 20 m (13%). Most decodes (97%) fell within the six-hour window 07:00-13:00 UTC. Most successfully decoded messages attributed to this token fell in SO8OO's moderate S/N range (66%); the estimated median was -14 dB.

Overview

122
Messages attributed
5
UTC dates decoded
14
Active 15-min windows
-14 dB
Estimated median S/N

Bands

40m · 106 20m · 16
First attributed message: 2026-07-24
Last attributed message: 2026-09-13 12:34 UTC

Observed FT8 message patterns

Attributed sample
122 messages
Active dates
5 UTC dates
Estimated median S/N
-14 dB
Estimated 10th-90th percentile
-19 to -10 dB
Recurring-pattern threshold
Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 38, moderate (-15 to -9 dB) 80, strong (≥ -8 dB) 4.

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 YO9FUL 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 YO9FUL

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
KN34 · 98 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
721 km (approx.)
Last such locator decoded
2026-09-13 12:34 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 UTCBandYO9FUL S/NCounterpartCounterpart S/NMsgsCapture
09-13 12:33 40m -14 / - UB3ADO/P - / - 3 Partial capture
09-13 12:28 40m -14 / - YO2LC -16 / -2 4 ✓ Closing observed
09-13 12:17 40m -10 / - SQ7JHS -16 / -16 7 Partial capture
09-13 12:16 40m -11 / - R3UCC/P - / - 3 Partial capture
09-13 12:13 40m -18 / -9 UT1EF -19 / 0 5 ✓ Full exchange observed
09-11 17:25 40m - / - IK1MJK/P -9 / - 2 Partial capture
09-09 07:42 40m - / +6 LZ2INP -6 / - 4 ✓ Closing fragment
09-09 07:40 40m - / - SQ6S -4 / - 2 Partial capture
09-09 07:37 40m -12 / - Z68PX - / - 3 Partial capture
09-08 10:32 40m -11 / - HA7UL - / -15 4 Partial capture
09-08 10:29 40m - / - HA7UL -23 / - 2 Partial capture
09-08 07:30 40m -12 / -1 YO2UKG -8 / - 4 ✓ Full exchange observed
09-08 07:24 40m -20 / - DK8EW - / - 2 Partial capture
09-08 02:26 40m -13 / - SO100PKP - / -5 2 Partial capture
09-08 02:17 40m - / -2 F1PBZ -8 / - 4 ✓ Closing fragment
08-20 01:43 40m - / -19 UB4CJS -13 / - 7 Partial capture
08-20 01:42 40m - / - F1IQH -15 / - 3 Partial capture
07-30 02:22 40m - / -11 R2AL -6 / - 4 ✓ Closing fragment
07-30 02:19 40m - / - RZ2H -14 / - 2 Partial capture
07-28 11:07 20m - / -8 PD4FL -18 / - 5 ✓ Closing fragment
07-28 10:48 20m - / -7 GJ0KYZ -4 / - 4 Partial capture
07-28 10:41 20m - / -7 IW1PVB -14 / - 2 Partial capture
07-28 10:39 20m - / - RY7G -8 / - 2 ✓ Closing fragment
07-27 23:51 40m - / - DJ0MAB -11 / - 3 Partial capture
07-27 23:50 40m - / -5 RN6HK -3 / - 3 ✓ Closing fragment
07-27 16:02 20m - / - RA4L -12 / - 2 Partial capture
07-25 11:19 20m - / -21 PA3MVD -18 / - 5 Partial capture
07-25 11:13 20m - / -21 PA3MVD -13 / - 6 Partial capture
07-25 11:06 20m - / -10 PA8S -12 / - 4 ✓ Closing fragment
07-25 10:53 20m -14 / - PD4FL - / +2 2 Partial capture
07-25 10:49 20m - / - DL1R -3 / - 9 Partial capture
07-25 10:42 20m -19 / - 9A9TT - / - 2 Partial capture
07-24 08:36 20m - / - DK3HV -12 / - 4 Partial capture
07-24 08:31 20m -13 / -8 IQ4JO +4 / - 3 ✓ Closing observed
07-23 22:26 20m - / - HI3A -16 / - 2 ✓ Closing fragment
07-23 22:23 20m - / -11 HI3A -16 / - 2 Partial capture

Recent FT8 messages decoded at SO8OO

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

40m 
UTC    dB Audio  Message
122800 -15 1540  YO9FUL YO2LC KN15
122815 -15 1234  YO2LC YO9FUL -02 (x2)
122900 -16 1540  YO9FUL YO2LC 73
122915 -13 1236  CQ YO9FUL KN34 (x8)
123315 -13 1233  UB3ADO/P YO9FUL KN34 (x3)
20m 
UTC    dB Audio  Message
104030  -5 1831  YO9FUL RY7G 73
104100  -9 1831  YO9FUL IW1PVB JN44 (x2)
104430  +5 2780  YO9FUL F1PBZ -07
104800 -10  889  YO9FUL GJ0KYZ -07 (x4)
105130 -21 1493  YO9FUL DJ0MAB R-21
110130 -22 1396  YO9FUL PD4FL JO33 (x6)

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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