ON4KDT — 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: Belgium Most frequent locator attributed to this token: JO20

Receiver-side FT8 activity involving ON4KDT, decoded by SO8OO in southeastern Poland. 540 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, across 49 UTC dates in the available aggregate history. Observed between 2026-06-06 and 2026-10-26.

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 540 FT8 messages attributed to ON4KDT as the transmitting token by decoded message structure across 49 UTC dates in the available aggregate history. The largest monitored-band total was 80 m (76%), followed by 40 m (24%) and 20 m (1%). Most decodes (92%) fell within the six-hour window 19:00-01:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -14 dB.

Overview

540
Messages attributed
49
UTC dates decoded
116
Active 15-min windows
-14 dB
Estimated median S/N

Bands

80m · 408 40m · 128 20m · 4
First attributed message: 2026-06-06
Last attributed message: 2026-10-26 00:31 UTC

Observed FT8 message patterns

Attributed sample
540 messages
Active dates
49 UTC dates
Estimated median S/N
-14 dB
Estimated 10th-90th percentile
-20 to -7 dB
Recurring-pattern threshold
Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 194, moderate (-15 to -9 dB) 261, strong (≥ -8 dB) 85.

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 ON4KDT 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 ON4KDT

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
JO20 · 346 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
1,194 km (approx.)
Last such locator decoded
2026-10-26 00:31 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 UTCBandON4KDT S/NCounterpartCounterpart S/NMsgsCapture
10-26 00:30 80m -13 / - SV1EAG - / - 2 Partial capture
10-13 21:14 80m -10 / +3 TF4M -10 / - 4 Partial capture
10-13 21:11 80m -6 / - M7BUY - / -12 3 Partial capture
10-13 20:57 40m -11 / - UA9QFF - / - 3 Partial capture
10-13 20:55 40m -12 / - EI9JOB -24 / +1 4 ✓ Closing observed
10-01 15:51 40m - / - US2YW +4 / - 2 Partial capture
10-01 15:50 40m - / - F5PZT -7 / - 3 Partial capture
10-01 15:50 40m -14 / - EI4KKB - / -10 2 Partial capture
10-01 15:49 40m - / - DF5DY -1 / - 8 Partial capture
09-25 19:59 80m - / - M9OOS -5 / - 6 Partial capture
09-15 19:29 40m -15 / - EI2JVB - / - 2 Partial capture
09-15 19:29 40m - / - DF3IS +2 / - 2 Partial capture
09-09 23:10 80m - / - 9A5E +11 / - 4 Partial capture
09-09 23:03 80m -13 / -8 DL9KM -20 / -1 4 ✓ Full exchange observed
09-09 22:50 80m - / -23 SV9MBH -18 / - 4 ✓ Closing fragment
09-09 22:48 80m - / - OH3GBW 0 / - 2 Partial capture
09-09 22:44 80m - / -8 F1PBZ -6 / - 3 Partial capture
09-09 22:44 80m - / -1 ON4MAP -21 / - 3 ✓ Closing fragment
09-09 22:40 80m -11 / -7 DH5BM -10 / +9 12 ✓ Full exchange observed
09-09 22:38 40m - / - TA2EE -19 / - 5 Partial capture
09-09 22:32 80m -18 / -14 SM7TZK 0 / - 4 Partial capture
09-09 22:27 80m -11 / -4 IN3XUG -4 / +10 7 ✓ Full exchange observed
09-08 21:06 80m -14 / - LA2DMA - / - 2 Partial capture
09-08 21:05 80m -15 / - DA6OOM - / 0 2 ✓ Closing fragment
09-08 21:03 80m -18 / - F4AMS - / +10 3 ✓ Closing fragment
09-08 20:51 80m - / - G4DBW -6 / - 2 Partial capture
09-08 20:49 80m - / -12 HB9EKJ -19 / - 3 ✓ Closing fragment
09-08 20:45 80m - / -13 EU7FBB -4 / - 2 ✓ Closing fragment
09-08 19:58 80m -16 / -15 OZ7CL -12 / -13 3 ✓ Full exchange observed
09-08 19:42 80m -16 / - DO6THI - / -7 2 Partial capture
09-08 19:42 80m -19 / -12 SP7OK +2 / -11 9 ✓ Full exchange observed
09-08 19:38 80m - / +1 DK6WS -8 / - 2 ✓ Closing fragment
09-08 19:37 80m -14 / -8 F5RMK -16 / - 2 Partial capture
09-08 19:34 80m -11 / -9 GU4WRP -15 / - 4 Partial capture
09-06 23:42 40m -10 / -13 YT2FA -12 / - 3 ✓ Closing observed
09-06 23:41 40m - / - DK8HC -4 / - 2 Partial capture
09-06 23:40 40m -3 / - US2YW - / -15 2 Partial capture
09-06 23:40 40m - / - IU8RFW -7 / - 2 Partial capture
09-06 23:39 40m -8 / -10 UR4QWW -10 / +6 5 ✓ Full exchange observed
09-06 23:37 40m -8 / - KP4MAQ - / +2 4 ✓ Closing fragment
09-06 23:34 40m -12 / - EX7CQ -6 / +10 7 ✓ Closing observed
09-06 23:32 80m - / - DA6OOM -10 / - 4 Partial capture
09-06 23:32 40m -12 / - SM7TZK - / - 3 Partial capture
09-06 23:30 80m - / - CT2GQA -14 / - 2 Partial capture
09-06 23:30 80m - / - RD7O +11 / - 4 Partial capture
09-06 23:24 80m -14 / +4 F5RMK -10 / - 5 ✓ Full exchange observed
09-06 23:24 80m -12 / -11 EC3A -10 / - 5 ✓ Full exchange observed
09-06 23:22 80m -11 / -8 EA3LF -14 / +9 5 ✓ Full exchange observed
09-06 15:27 40m - / -17 OK3MB -6 / - 2 Partial capture
09-04 23:53 80m -9 / - C31KC - / -4 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
200030  -2  550  ON4KDT M9OOS IO93 (x4)
192215 -14 1103  F4HER ON4KDT JO20
211145 -10 1103  M7BUY ON4KDT JO20 (x3)
211415 -11 1103  TF4M ON4KDT JO20 (x2)
211500 -10 1807  ON4KDT TF4M +03
211515 -10 1103  M7BUY ON4KDT -07
211530 -11 1807  ON4KDT TF4M +03
003045 -10 1103  SV1EAG ON4KDT JO20 (x2)
40m 
UTC    dB Audio  Message
155145  +5 1138  ON4KDT US2YW KN28
155145  +0  576  ON4KDT DF5DY JO41
155215  +2 1138  ON4KDT US2YW KN28
155215  +1  576  ON4KDT DF5DY JO41 (x2)
192630 -17 1139  OZ7CL ON4KDT 73
205530 -12 1138  EI9JOB ON4KDT JO20 (x2)
205615 -24 1317  ON4KDT EI9JOB RR73
205630 -13 1139  EI9JOB ON4KDT 73
205700 -15 1138  UA9QFF ON4KDT JO20 (x3)
205830  -7 1139  CQ ON4KDT JO20
205900  -6 1139  IZ8JFA ON4KDT JO20
20m 
UTC    dB Audio  Message
055100 -16 1177  ON4KDT F6HUK -04 (x6)
212445 -18 1365  ON4KDT 3A2MW -16
213400  +2  354  ON4KDT MI7RDK IO74 (x2)
200515  -4 1227  DJ0MAB ON4KDT JO20

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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