KB3Z — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: United States Most frequent locator attributed to this token: FN20

Receiver-side FT8 activity involving KB3Z, decoded by SO8OO in southeastern Poland. 4,695 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, across 25 UTC dates in the available aggregate history. Observed between 2026-06-06 and 2026-09-07.

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 4,695 FT8 messages attributed to KB3Z as the transmitting token by decoded message structure across 25 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (69%), followed by 40 m (30%) and 80 m (2%). Most decodes (74%) fell within the six-hour window 23:00-05:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -9 dB.

Overview

4,695
Messages attributed
25
UTC dates decoded
347
Active 15-min windows
-9 dB
Estimated median S/N

Bands

80m · 74 40m · 1,390 20m · 3,231
First attributed message: 2026-06-06
Last attributed message: 2026-09-07 06:52 UTC

Observed FT8 message patterns

Attributed sample
4,695 messages
Active dates
25 UTC dates
Estimated median S/N
-9 dB
Estimated 10th-90th percentile
-18 to -1 dB
Recurring-pattern threshold
Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 1,072, moderate (-15 to -9 dB) 1,470, strong (≥ -8 dB) 2,153.

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 KB3Z 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 KB3Z

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
FN20 · 2,680 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
7,111 km (approx.)
Last such locator decoded
2026-09-07 06:52 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 UTCBandKB3Z S/NCounterpartCounterpart S/NMsgsCapture
09-07 07:44 40m - / -20 ON8LX -16 / - 3 ✓ Closing fragment
09-07 07:25 40m - / -19 PD1ADA -13 / - 3 Partial capture
09-07 06:52 40m -22 / -11 DF2AP -16 / - 2 Partial capture
09-07 06:47 40m - / -13 HA1ZW -1 / - 2 ✓ Closing fragment
09-07 06:46 40m -17 / +2 SP100PKP +16 / - 2 Partial capture
09-07 06:35 40m -14 / - OE1AVO - / - 7 Partial capture
09-07 06:33 40m -8 / - AA3DP - / +4 3 ✓ Closing fragment
09-07 06:32 40m -6 / - SQ9DJQ - / -7 2 ✓ Closing fragment
09-07 06:31 40m - / -5 SP5AA -18 / - 2 ✓ Closing fragment
09-07 06:29 40m -9 / - PA0MUS - / -1 2 ✓ Closing fragment
09-07 06:28 40m -10 / - G4FPS - / -8 3 ✓ Closing fragment
09-07 06:26 40m -19 / -13 OZ6NC -24 / -18 3 Partial capture
09-07 06:22 40m -6 / -15 IK2ZJR +3 / - 4 ✓ Closing observed
09-07 06:20 40m -5 / - IU2VUZ - / - 7 Partial capture
09-07 06:14 40m -15 / - OH6GAZ - / -18 7 Partial capture
09-07 06:13 40m -12 / -7 DK6WH +4 / -3 5 ✓ Full exchange observed
09-07 06:10 40m -15 / - MM0ABM - / -15 4 ✓ Closing fragment
09-07 06:07 40m - / - ON8PR -6 / - 2 Partial capture
09-07 06:06 40m -10 / -12 3Z100PKP -9 / -14 7 Partial capture
09-07 06:03 40m -6 / -14 F6HUK -9 / +1 7 ✓ Full exchange observed
09-07 06:01 40m - / - ON8PR -14 / - 2 Partial capture
09-07 05:59 40m -17 / +4 DL6NDN +4 / +4 6 ✓ Full exchange observed
09-07 05:58 40m -17 / +3 DF2KD -20 / -5 4 ✓ Full exchange observed
09-07 05:57 40m - / - IN3LTL +2 / - 2 Partial capture
09-07 05:52 40m -6 / -4 DF7JS +4 / -6 6 ✓ Full exchange observed
09-07 05:51 40m -16 / - F1RIQ - / - 2 Partial capture
09-07 05:50 40m - / - IN3LTL 0 / - 2 Partial capture
09-07 05:47 40m -16 / -4 F1RCQ +1 / - 5 ✓ Closing observed
09-07 05:46 40m -14 / - CT7AUT -21 / - 3 ✓ Closing observed
09-07 05:44 40m -14 / -9 SP4MPH -11 / -1 5 ✓ Full exchange observed
09-07 05:42 40m -4 / - MW7TTA - / +5 2 ✓ Closing fragment
09-07 05:34 40m -13 / -12 PD3PAM -2 / -6 4 ✓ Full exchange observed
09-07 05:33 40m -12 / - EA4EQ - / - 3 ✓ Closing fragment
09-07 05:28 40m -8 / - PD2MAC -7 / -24 4 ✓ Closing observed
09-07 05:24 40m - / -19 9A60CBM +2 / - 5 Partial capture
09-07 05:23 40m -8 / - EG42SDC - / -5 12 Partial capture
09-07 05:17 40m -13 / - IK7TOE - / -16 8 Partial capture
09-07 05:15 40m - / - R3WF -12 / - 2 Partial capture
09-07 05:13 40m -10 / - IT9ACJ - / - 6 Partial capture
09-07 05:10 40m -11 / - V51PJ - / - 6 Partial capture
09-07 05:08 40m - / -4 DL2MIJ -7 / - 2 ✓ Closing fragment
09-07 05:06 40m -12 / -14 RU3GC +5 / - 7 Partial capture
09-07 04:56 40m -7 / - WA2HIP - / - 3 Partial capture
09-07 04:54 40m -10 / - SQ6WA - / +1 3 ✓ Closing fragment
09-07 04:52 40m -2 / - SP5ENM - / -4 2 ✓ Closing fragment
09-07 04:47 40m -10 / - IK2JYT -4 / - 10 ✓ Full exchange observed
09-07 04:46 40m -12 / - KS1WK - / - 2 Partial capture
09-07 04:45 40m -12 / - EG3SQ -24 / - 3 ✓ Closing observed
09-07 04:44 40m -11 / - ON3ML - / -3 2 ✓ Closing fragment
09-07 04:41 40m -7 / -5 OZ1BLP -10 / - 3 ✓ Closing observed

Recent FT8 messages decoded at SO8OO

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

40m 
UTC    dB Audio  Message
064630 +16 2562  KB3Z SP100PKP +02
064700 +16 2562  KB3Z RR73; SP6SOZ <...> -16
064745  -7 1344  KB3Z HA1ZW -13 (x2)
065230 -22 2018  DF2AP KB3Z FN20
065245 -16 2015  KB3Z DF2AP -11
071445 -24 1633  KB3Z TF5B RR73
072245 -10  308  KB3Z GJ0KYZ RR73
072515 -15 1997  KB3Z PD1ADA -19 (x3)
074445 -14 1151  KB3Z ON8LX -20 (x3)
084645 -17 1746  KB3Z DG1KFR -25
20m 
UTC    dB Audio  Message
213830 -21 1388  F1POK KB3Z R-07 (x2)
213930 -19 1388  OK2UPY/P KB3Z -06 (x2)
214030 -21 1883  AO5FSB KB3Z FN20
214200 -21 1939  <...> KB3Z R-15
222230 -10 1167  KB3Z 8Z1IT -07 (x2)
223330 -19 2032  KB3Z CT2GQN -18 (x3)
224715  +5 2370  KB3Z UA6YW -14 (x2)
234630 -11  534  KB3Z TJ1GD +00 (x2)
80m 
UTC    dB Audio  Message
035030 -24 1584  KB3Z GU4WRP -18
035100 -14  943  KB3Z SV8CKM KM08
035245 -24 1585  GU4WRP KB3Z R-19
035330  -6 1843  KB3Z SM7XON JO87 (x3)
041445  -9 1501  KB3Z DL1UDO JO31 (x3)
045530  -9 2002  KB3Z OR7K -13 (x2)
051630 -16 2340  KB3Z F6FTB JN27 (x2)
052930  -2 2858  KB3Z G4IRN -08 (x2)
60m 
UTC    dB Audio  Message
020630  +2  349  KB3Z 4L7T LN21 (x2)
10m 
UTC    dB Audio  Message
185145 -22 1185  KB3Z PD0RCQ JO21 (x2)
074045 -22 1591  KB3Z F4MTS JN07

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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