IZ4DYU — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Italy Most frequent locator attributed to this token: JN54

Receiver-side FT8 activity involving IZ4DYU, decoded by SO8OO in southeastern Poland. 91 FT8 messages attributed to this token as transmitter, on 80m, 40m, across 8 UTC dates in the available aggregate history. Observed between 2026-09-06 and 2026-09-16.

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 91 FT8 messages attributed to IZ4DYU as the transmitting token by decoded message structure across 8 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (80%), followed by 80 m (20%). Most decodes (53%) fell within the six-hour window 16:00-22:00 UTC. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (80%); the estimated median was -5 dB.

Overview

91
Messages attributed
8
UTC dates decoded
14
Active 15-min windows
-5 dB
Estimated median S/N

Bands

80m · 18 40m · 73
First attributed message: 2026-09-06
Last attributed message: 2026-09-16 20:48 UTC

Observed FT8 message patterns

Attributed sample
91 messages
Active dates
8 UTC dates
Estimated median S/N
-5 dB
Estimated 10th-90th percentile
-11 to +6 dB
Recurring-pattern threshold
Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 4, moderate (-15 to -9 dB) 14, strong (≥ -8 dB) 73.

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 IZ4DYU 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 IZ4DYU

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
JN54 · 61 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
1,013 km (approx.)
Last such locator decoded
2026-09-16 20:45 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 UTCBandIZ4DYU S/NCounterpartCounterpart S/NMsgsCapture
09-18 09:37 10m - / -9 EX8MEM -21 / - 2 ✓ Closing fragment
09-17 17:01 80m - / - 9A4ZM +4 / - 2 Partial capture
09-17 17:01 80m - / - SV9/TF1OL -9 / - 3 ✓ Closing fragment
09-16 20:45 40m +6 / - 4L7T - / -9 6 Partial capture
09-14 06:51 40m -6 / - VP5/K5UR - / - 6 Partial capture
09-14 06:39 40m -8 / - EA8UP - / -8 4 ✓ Closing fragment
09-13 21:37 40m - / - EB3JT -10 / - 6 Partial capture
09-13 21:33 40m -9 / - CT3HU - / +8 7 ✓ Closing fragment
09-13 21:26 40m -8 / - US2YW - / -20 2 Partial capture
09-13 21:21 40m -6 / - TN8GD - / -17 2 Partial capture
09-13 21:11 40m -15 / - D2ACE - / - 7 Partial capture
09-12 07:15 40m -5 / - VK7AC - / - 5 Partial capture
09-12 06:39 40m -7 / - J38LD - / - 4 Partial capture
09-12 06:32 40m -4 / - J38LD - / - 2 Partial capture
09-11 06:34 40m -9 / - J38DX - / - 4 Partial capture
09-11 06:27 40m -6 / +2 F5RRS +2 / - 6 ✓ Full exchange observed
09-11 06:25 40m -6 / - EA3HMM - / +6 2 ✓ Closing fragment
09-11 06:25 40m -3 / +10 9A4ZM 0 / -9 8 ✓ Full exchange observed
09-11 06:24 40m -5 / +1 HG8LXL -6 / - 4 ✓ Closing observed
09-11 06:22 40m -4 / - ZL2THM - / -20 5 ✓ Closing fragment
09-11 06:16 40m -5 / - NP3MR - / - 6 Partial capture
09-10 20:49 80m 0 / - EA3FR - / -20 4 Partial capture
09-10 20:46 80m +1 / -11 F5RRS +7 / - 4 ✓ Closing observed
09-10 20:45 80m - / +6 T77RN -8 / - 2 ✓ Closing fragment
09-07 16:09 40m +2 / - Z68BR - / +1 6 Partial capture
09-06 21:47 80m +4 / -15 ON1PK -20 / -2 7 ✓ Full exchange observed
09-06 19:14 80m - / - LY1DY +12 / - 5 Partial capture
09-06 19:11 80m +4 / -13 UR4LRG +11 / +3 5 ✓ Full exchange observed
09-06 19:08 80m +4 / - RN3YN - / - 5 Partial capture

Recent FT8 messages decoded at SO8OO

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

10m 
UTC    dB Audio  Message
093700 -22 1639  IZ4DYU EX8MEM -09 (x2)
100030 -17 2246  IZ4DYU <...> -04
80m 
UTC    dB Audio  Message
204530  -6  307  IZ4DYU T77RN +06 (x2)
204630  +9  555  IZ4DYU F5RRS JN36 (x2)
204715  +1 1203  F5RRS IZ4DYU RR73
204730  +9  555  IZ4DYU F5RRS 73
204945  +0 1204  EA3FR IZ4DYU R-20 (x4)
170115 -14 2556  <IZ4DYU> SV9/TF1OL 73
170115  +4 1569  IZ4DYU 9A4ZM JN86 (x2)
170215  -7 2556  IZ4DYU SV9/TF1OL RR73 (x2)
40m 
UTC    dB Audio  Message
064045  -9 1239  EA8UP IZ4DYU 73
064200 -14 1239  IZ4DYU LZ2VQ KN23
065130  -5 1239  VP5/K5UR IZ4DYU JN54 (x6)
204500  -9 1759  4L7T IZ4DYU JN54 (x6)
205145  -3  460  IZ4DYU 4L7T RR73

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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