KA3IRT — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: United States Most frequent locator attributed to this token: EN90

Receiver-side FT8 activity involving KA3IRT, decoded by SO8OO in southeastern Poland. 11 FT8 messages attributed to this token as transmitter, on 80m, 20m, across 3 UTC dates in the available aggregate history. Observed between 2026-08-04 and 2026-08-25.

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 11 FT8 messages attributed to KA3IRT as the transmitting token by decoded message structure across 3 UTC dates in the available aggregate history. The largest monitored-band total was 80 m (55%), followed by 20 m (45%). In this small sample, the estimated median decoder S/N was -20 dB; no usual signal pattern is inferred.

Overview

11
Messages attributed
3
UTC dates decoded
3
Active 15-min windows
-20 dB
Estimated median S/N

Bands

80m · 6 20m · 5
First attributed message: 2026-08-04
Last attributed message: 2026-08-25 01:58 UTC

Observed FT8 message patterns

Attributed sample
11 messages
Active dates
3 UTC dates
Estimated median S/N
-20 dB
S/N percentile sample
Too small
Recurring-pattern threshold
Not met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 10, moderate (-15 to -9 dB) 1, 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 KA3IRT in decoded directed-looking exchanges:

Most frequent locator attributed to KA3IRT

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
EN90 · 4 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
7,464 km (approx.)
Last such locator decoded
2026-08-25 01:53 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 UTCBandKA3IRT S/NCounterpartCounterpart S/NMsgsCapture
09-20 02:08 40m - / - EA1HVS -20 / - 2 Partial capture
09-19 04:49 40m - / -19 S57MPU +12 / - 3 Partial capture
09-19 03:37 40m - / -11 EA8BS -9 / - 2 ✓ Closing fragment
09-19 03:35 40m - / - CT2HEX -12 / - 2 Partial capture
09-19 01:35 40m - / - WA1MCR -10 / - 2 ✓ Closing fragment
09-11 05:37 80m - / - IZ2AMW -16 / - 3 Partial capture
09-11 05:36 80m - / - ON7GB +2 / - 2 ✓ Closing fragment
09-11 05:00 40m - / -14 HB9IRO -8 / - 2 ✓ Closing fragment
09-11 04:58 40m - / -16 IN3IZQ -8 / - 2 ✓ Closing fragment
09-11 04:45 40m - / -14 HB9IRO 0 / - 9 Partial capture
09-11 04:24 40m - / -14 IW8RQA +10 / - 2 ✓ Closing fragment
09-11 04:14 40m - / -11 II0CDS -8 / - 2 ✓ Closing fragment
09-11 03:22 40m - / -16 EA3IZF -7 / - 2 ✓ Closing fragment
09-03 03:56 40m - / -12 LZ936BA 0 / - 2 Partial capture
09-03 02:57 40m - / - IW0HAC -4 / - 3 Partial capture
09-03 02:56 40m - / -19 F1PBZ +2 / - 4 Partial capture
09-01 01:56 40m - / -11 PT7YV -4 / - 2 ✓ Closing fragment
09-01 01:55 40m - / -19 IZ8EYN -5 / - 6 Partial capture
09-01 01:52 40m - / +1 WW2N -10 / - 2 ✓ Closing fragment
08-26 00:17 20m - / - HK3G -12 / - 4 Partial capture
08-25 01:39 40m - / -4 KT4ZG -2 / - 2 ✓ Closing fragment
08-24 01:05 20m - / - DL1R +4 / - 9 Partial capture
08-23 01:38 20m -24 / - K0WML - / - 3 ✓ Closing fragment
08-23 01:33 20m -15 / - VE9WZ - / +3 2 ✓ Closing fragment
08-22 01:31 20m - / -3 DL3PWR -6 / - 3 Partial capture
08-22 00:32 20m - / - DL1AN 0 / - 2 ✓ Closing fragment
08-20 00:16 20m - / -16 7Z1BQ -3 / - 2 ✓ Closing fragment
08-06 22:12 20m - / - EI8HY -9 / - 4 Partial capture
07-22 23:23 20m - / -2 VO1CH +1 / - 2 ✓ Closing fragment
07-21 04:52 40m - / -9 II3DRC -8 / - 2 ✓ Closing fragment
07-21 04:00 40m - / -12 HB9DGK -6 / - 2 ✓ Closing fragment
07-18 03:13 40m - / -18 DF7JS -5 / - 10 Partial capture
07-10 01:42 20m - / -8 4Z5PG +8 / - 2 ✓ Closing fragment
06-25 05:26 40m - / -11 DH9DR -11 / - 4 ✓ Closing fragment
06-24 03:29 40m - / -13 DK7UY -12 / - 2 Partial capture
06-24 03:27 40m - / -17 IK4LZH -3 / - 3 ✓ Closing fragment
06-22 22:10 20m - / -9 F4MOH -8 / - 2 Partial capture

Recent FT8 messages decoded at SO8OO

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

40m 
UTC    dB Audio  Message
050015  -5  541  KA3IRT HB9IRO -14 (x2)
013545  -8  795  KA3IRT WA1MCR +17 (x2)
033500 -10 2249  KA3IRT CT2HEX IM58 (x2)
033700  -9 1880  KA3IRT EA8BS -11 (x2)
043030  -4 1189  KA3IRT F4HQL -09
044945  +8  647  KA3IRT S57MPU -19 (x3)
060600 -16 1544  KA3IRT M9LDX -18
020800 -21 1639  KA3IRT EA1HVS IN73 (x2)
80m 
UTC    dB Audio  Message
041145  -1  505  KA3IRT TM00TFR -16
015745 -24 1934  KD8ZKS KA3IRT R+13
015115 -24 1802  KF8EXX KA3IRT 73
015315 -17 1344  CQ KA3IRT EN90                        a1 (x2)
015545 -20 1344  K0FAO KA3IRT RR73
015815 -19 1344  W4WHQ KA3IRT 73
053630  -2 2304  KA3IRT ON7GB JO21 (x2)
053730 -15 1683  KA3IRT IZ2AMW JN45 (x3)
20m 
UTC    dB Audio  Message
014045 -24 1364  K0WML KA3IRT 73
010530  +6 2659  KA3IRT DL1R JN58 (x9)
001745 -11 1431  KA3IRT HK3G FJ24 (x4)
000530 -14 1673  KA3IRT ON1DGN -07

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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