YU7VD — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Serbia Most frequent locator attributed to this token: KN05

Receiver-side FT8 activity involving YU7VD, decoded by SO8OO in southeastern Poland. 17 FT8 messages attributed to this token as transmitter, on 40m, 20m, across 2 UTC dates in the available aggregate history. Observed between 2026-06-28 and 2026-08-10.

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 17 FT8 messages attributed to YU7VD as the transmitting token by decoded message structure across 2 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (53%), followed by 40 m (47%). In this small sample, the estimated median decoder S/N was -16 dB; no usual signal pattern is inferred.

Overview

17
Messages attributed
2
UTC dates decoded
3
Active 15-min windows
-16 dB
Estimated median S/N

Bands

40m · 8 20m · 9
First attributed message: 2026-06-28
Last attributed message: 2026-08-10 08:11 UTC

Observed FT8 message patterns

Attributed sample
17 messages
Active dates
2 UTC dates
Estimated median S/N
-16 dB
S/N percentile sample
Too small
Recurring-pattern threshold
Not met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 9, moderate (-15 to -9 dB) 0, 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. 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 YU7VD in decoded directed-looking exchanges:

Most frequent locator attributed to YU7VD

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
KN05 · 8 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
497 km (approx.)
Last such locator decoded
2026-08-10 08:08 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 UTCBandYU7VD S/NCounterpartCounterpart S/NMsgsCapture
08-20 13:07 20m - / -3 DL6KA 0 / - 2 ✓ Closing fragment
08-20 13:02 20m - / - DL1UDO -9 / - 3 Partial capture
08-20 12:54 20m - / -11 PD2WL -18 / - 3 ✓ Closing fragment
08-20 12:54 20m - / -4 IS0KNG -2 / - 4 ✓ Closing fragment
08-19 13:25 10m - / - DK5IR -21 / - 2 Partial capture
08-19 13:24 10m - / - DG2SAT -12 / - 2 Partial capture
08-19 13:13 10m - / -18 IU5RBX -20 / - 2 Partial capture
08-19 13:13 10m - / +3 IV3DSG -3 / - 3 ✓ Closing fragment
08-19 13:09 10m - / 0 9A6ZZ -15 / - 2 ✓ Closing fragment
08-10 08:11 20m -16 / - HA1ZW -7 / - 2 ✓ Closing observed
08-10 08:08 20m -18 / -5 HA1BF +3 / - 4 ✓ Closing observed
08-10 08:06 20m -21 / - DK3HV -18 / - 3 ✓ Closing observed
08-10 08:04 20m -17 / - IU2THY +4 / +5 3 Partial capture
08-10 08:02 20m -18 / - HA1BF - / - 2 Partial capture
07-15 07:48 20m - / -8 YO4GIY -12 / - 2 ✓ Closing fragment
07-15 07:41 20m - / - DL1R -6 / - 8 Partial capture
07-15 07:41 20m - / -8 F1PBZ +2 / - 2 Partial capture
07-15 05:57 20m - / -6 F1AFW -21 / - 3 ✓ Closing fragment
07-15 05:57 20m - / - F4LNM -14 / - 3 Partial capture
07-15 05:51 20m - / -3 R3KCW -9 / - 3 ✓ Closing fragment
07-09 14:57 20m - / -6 M0PPT -13 / - 2 ✓ Closing fragment
07-09 14:45 20m - / -8 R7MP -3 / - 3 ✓ Closing fragment
07-09 14:39 20m - / -6 3A2MW -15 / - 3 ✓ Closing fragment
07-09 14:33 20m - / - EA3FYO -2 / - 2 Partial capture
07-09 14:31 20m - / - F5LPL -18 / - 3 ✓ Closing fragment
07-09 14:12 20m - / -14 R4FDW -16 / - 3 Partial capture
07-09 14:11 20m - / - PD2ARI -22 / - 2 ✓ Closing fragment
07-09 14:06 20m - / -9 F1IQH -4 / - 3 ✓ Closing fragment
06-28 17:12 40m -3 / - 3D2USU - / +2 8 ✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

20m 
UTC    dB Audio  Message
125445 -20 1088  YU7VD PD2WL -11 (x2)
125515  -1 1695  YU7VD IS0KNG -04
125545 -19 1087  YU7VD PD2WL RR73
125545  +0 1695  YU7VD IS0KNG -04
125615 -12 2594  YU7VD PD0HLA -03
125645  -6 1696  YU7VD IS0KNG RR73
125845  +6 1373  YU7VD RU4SS LO36
130245 -11 1523  YU7VD DL1UDO JO31 (x3)
130715  -2 1272  YU7VD IK1MJK/P JN35
130715  -6  596  YU7VD DL6KA -03 (x2)
131115 -10 2594  YU7VD PD0HLA -10
10m 
UTC    dB Audio  Message
130945 -15 1979  YU7VD 9A6ZZ +00 (x2)
131315  -5 1614  YU7VD IV3DSG JN66 (x2)
131345 -21 2029  YU7VD IU5RBX JN53
131415  -2 1614  YU7VD IV3DSG 73
131515 -19 2028  YU7VD IU5RBX R-18
132415 -10 1319  YU7VD DG2SAT JN48 (x2)
132515 -19 1382  YU7VD DK5IR JN49 (x2)
40m 
UTC    dB Audio  Message
171215  -2  867  3D2USU YU7VD KN05 (x8)

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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