KD4UO — 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: United States Most frequent locator attributed to this token: EM84

Receiver-side FT8 activity involving KD4UO, decoded by SO8OO in southeastern Poland. 14 FT8 messages attributed to this token as transmitter, on 20m, across 3 UTC dates in the available aggregate history. Observed between 2026-08-24 and 2026-08-26.

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 14 FT8 messages attributed to KD4UO as the transmitting token by decoded message structure across 3 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (100%). In this small sample, the estimated median decoder S/N was -21 dB; no usual signal pattern is inferred.

Overview

14
Messages attributed
3
UTC dates decoded
4
Active 15-min windows
-21 dB
Estimated median S/N

Bands

20m · 14
First attributed message: 2026-08-24
Last attributed message: 2026-08-26 22:47 UTC

Observed FT8 message patterns

Attributed sample
14 messages
Active dates
3 UTC dates
Estimated median S/N
-21 dB
S/N percentile sample
Too small
Recurring-pattern threshold
Not met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 14, moderate (-15 to -9 dB) 0, strong (≥ -8 dB) 0.

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 KD4UO in decoded directed-looking exchanges:

Most frequent locator attributed to KD4UO

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
EM84 · 10 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
8,079 km (approx.)
Last such locator decoded
2026-08-26 22:47 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 UTCBandKD4UO S/NCounterpartCounterpart S/NMsgsCapture
11-02 01:50 80m - / - UX5UO +8 / - 6 Partial capture
11-02 01:33 80m - / -15 VE9HEM -17 / - 3 ✓ Closing fragment
11-02 01:21 40m - / -13 F5SJC -5 / - 3 ✓ Closing fragment
10-28 07:03 80m - / -15 G0BLB -8 / - 2 ✓ Closing fragment
10-26 01:46 40m - / - F5OYA/P -15 / - 3 ✓ Closing fragment
10-26 01:43 40m - / -6 RU3GF +18 / - 3 ✓ Closing fragment
10-26 01:01 40m - / - R7DX -7 / - 3 Partial capture
10-26 00:45 40m - / -23 CT9/DF7EE -8 / - 5 Partial capture
10-26 00:26 40m - / - IW9FRA -20 / - 2 ✓ Closing fragment
10-26 00:24 40m - / - EA3ACA -8 / - 2 ✓ Closing fragment
09-30 23:20 40m - / - F4EGM -8 / - 2 ✓ Closing fragment
09-30 23:18 40m - / -6 CT1BWU -8 / - 3 ✓ Closing fragment
09-30 22:55 40m - / -9 EA4GA -17 / - 4 ✓ Closing fragment
09-30 22:33 40m - / -17 SV9QWC -12 / - 2 ✓ Closing fragment
09-30 22:19 40m - / - K4NV -20 / - 2 Partial capture
09-25 06:30 80m - / -6 G0TSM -4 / - 2 ✓ Closing fragment
09-25 06:07 80m - / -19 ON1JP -20 / - 4 Partial capture
08-28 14:40 20m - / -21 M7VME -3 / - 3 Partial capture
08-27 22:54 40m - / -11 PT7YV -8 / - 2 ✓ Closing fragment
08-26 22:46 20m -24 / - G3MTL - / - 2 Partial capture
08-26 22:32 20m - / -15 M0YMJ -6 / - 2 ✓ Closing fragment
08-25 22:44 20m -20 / - OY1HJ - / - 2 Partial capture
08-24 23:20 20m - / -4 KJ4HI -20 / - 2 ✓ Closing fragment
08-24 23:16 20m - / -5 N4DMV -11 / - 2 ✓ Closing fragment
08-24 23:08 20m - / -1 HC7AE -17 / - 2 ✓ Closing fragment
08-24 23:02 20m - / -10 ON5UE -11 / - 8 ✓ Closing fragment
08-24 22:50 20m -22 / - VE5UFO - / -9 4 Partial capture
08-24 22:47 20m -22 / - K1XHX - / -18 4 ✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

80m 
UTC    dB Audio  Message
060945 -23 1435  KD4UO ON1JP -19
063015  -2  735  KD4UO G0TSM -06 (x2)
070330  -9 1737  KD4UO G0BLB -15 (x2)
013330 -17  907  KD4UO VE9HEM -15 (x3)
015045  +9  686  KD4UO UX5UO KO50
015045  -2 1078  KD4UO F4EGM JN29
015115  +5  686  KD4UO UX5UO KO50 (x5)
40m 
UTC    dB Audio  Message
004745  -4 1150  KD4UO CT9/DF7EE -23
010130  -7 2135  KD4UO R7DX KN84 (x3)
010400  -7  841  KD4UO P4/WE9V -07
014300 +21 3011  KD4UO RU3GF -06 (x3)
014600  -5 1234  KD4UO F8MRQ JN17
014600 -13 1754  KD4UO F5OYA/P JN13 (x3)
012115  -9 2493  KD4UO F5SJC -13 (x3)
20m 
UTC    dB Audio  Message
230900 -17 1872  KD4UO HC7AE RR73
231600 -10  274  KD4UO N4DMV -05 (x2)
232000 -23 2198  KD4UO KJ4HI -04 (x2)
224000 -18 1320  N1LWK KD4UO EM84
224400 -21 1320  OY1HJ KD4UO EM84 (x2)
223200  -6 1554  KD4UO M0YMJ -15 (x2)
224630 -24 1623  G3MTL KD4UO EM84 (x2)
144015  -5  971  KD4UO M7VME -21 (x3)

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.

CW

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

Explore CW reception at SO8OO

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