YU/S55OO — 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: Serbia

Receiver-side FT8 activity involving YU/S55OO, decoded by SO8OO in southeastern Poland. 26 FT8 messages attributed to this token as transmitter, on 80m, 60m, across 1 UTC dates in the available aggregate history. Last observed 2026-09-21.

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 26 FT8 messages attributed to YU/S55OO as the transmitting token by decoded message structure across 1 UTC dates in the available aggregate history. The largest monitored-band total was 60 m (54%), followed by 80 m (46%). In this small sample, the estimated median decoder S/N was -9 dB; no usual signal pattern is inferred.

Overview

26
Messages attributed
1
UTC dates decoded
3
Active 15-min windows
-9 dB
Estimated median S/N

Bands

80m · 12 60m · 14
First attributed message: 2026-09-21
Last attributed message: 2026-09-21 21:28 UTC

Observed FT8 message patterns

Attributed sample
26 messages
Active dates
1 UTC dates
Estimated median S/N
-9 dB
Estimated 10th-90th percentile
-13 to -6 dB
Recurring-pattern threshold
Not met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 1, moderate (-15 to -9 dB) 16, strong (≥ -8 dB) 9.

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 YU/S55OO in decoded directed-looking exchanges:

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 UTCBandYU/S55OO S/NCounterpartCounterpart S/NMsgsCapture
09-22 08:01 40m - / -1 DK7ZT -11 / - 3 Partial capture
09-22 05:57 40m - / -7 DK7ZT -3 / - 4 Partial capture
09-22 04:19 40m - / -2 DK7ZT +1 / - 4 Partial capture
09-22 03:48 40m - / - F5RRS -15 / - 4 Partial capture
09-22 02:56 80m - / 0 UX5UO +13 / - 2 Partial capture
09-21 23:51 40m - / - F5RRS +6 / - 4 Partial capture
09-21 23:27 40m - / - TA3NK -7 / - 3 Partial capture
09-21 23:07 40m - / - GM4HYG -13 / - 2 Partial capture
09-21 21:28 60m - / - EA1DFP -8 / - 2 Partial capture
09-21 21:28 60m - / - EA1MX -3 / - 5 Partial capture
09-21 21:26 60m -11 / -2 IK8IUM -3 / - 4 ✓ Full exchange observed
09-21 21:23 60m -7 / -6 S50SD +8 / +7 5 Partial capture
09-21 21:23 60m -8 / - IK2BUF - / +10 2 ✓ Closing fragment
09-21 21:22 60m -9 / - <...> +6 / - 8 ✓ Closing fragment
09-21 20:55 40m - / - <...> +2 / - 2 ✓ Closing fragment
09-21 20:42 80m -9 / - <...> +5 / - 13 ✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

80m 
UTC    dB Audio  Message
204445  +5 2854  YU/S55OO <...> 73
204630  -9 1039  <...> YU/S55OO (x9)
220615  -4 1042  YU/S55OO ON4MAP JO20
025630 +13  947  YU/S55OO UX5UO KO50 (x2)
054415 +17  942  YU/S55OO SP9EYX JO90
142515 +10 1043  YU/S55OO SP5WZW +03
40m 
UTC    dB Audio  Message
035115 -20 1905  YU/S55OO F5RRS JN36
041915  +2 1906  YU/S55OO DK7ZT -02 (x4)
043900 -24  503  YU/S55OO 4O7CC -11
051715  -8 1906  YU/S55OO DK7ZT -13 (x8)
090800 -18 1908  YU/S55OO PD0MNO JO22
60m 
UTC    dB Audio  Message
212730 -10 1850  CQ YU/S55OO
212745  -2 1850  YU/S55OO DD6ZV JO62
212800  -8 1850  HA5UK YU/S55OO R+15
212815  -7 2691  <YU/S55OO> EA1MX IN73
212815  -9 1067  <YU/S55OO> EA1DFP IN53
212815  +6 1953  YU/S55OO <...> RR73
212830  -9 1850  <...> YU/S55OO 73
212845  -2 2690  YU/S55OO EA1MX IN73
212845  -6 1068  YU/S55OO EA1DFP IN53
212915  -3 2691  YU/S55OO EA1MX IN73 (x3)
010430 -19 1194  YU/S55OO KZ8C EM88
051845 -21 1950  YU/S55OO IZ4JMA JN54
054315  +7 1187  YU/S55OO DL1HRN JO61

CW

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

Explore CW reception at SO8OO

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