K4ZW — 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: FM18

Receiver-side FT8 activity involving K4ZW, decoded by SO8OO in southeastern Poland. 63 FT8 messages attributed to this token as transmitter, on 80m, 40m, across 2 UTC dates in the available aggregate history. Observed between 2026-08-22 and 2026-08-29.

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 63 FT8 messages attributed to K4ZW as the transmitting token by decoded message structure across 2 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (87%), followed by 80 m (13%). In this small sample, the estimated median decoder S/N was -6 dB; no usual signal pattern is inferred.

Overview

63
Messages attributed
2
UTC dates decoded
5
Active 15-min windows
-6 dB
Estimated median S/N

Bands

80m · 8 40m · 55
First attributed message: 2026-08-22
Last attributed message: 2026-08-29 23:55 UTC

Observed FT8 message patterns

Attributed sample
63 messages
Active dates
2 UTC dates
Estimated median S/N
-6 dB
Estimated 10th-90th percentile
-20 to 0 dB
Recurring-pattern threshold
Not met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 18, moderate (-15 to -9 dB) 2, strong (≥ -8 dB) 43.

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 K4ZW in decoded directed-looking exchanges:

Most frequent locator attributed to K4ZW

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
FM18 · 13 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
7,390 km (approx.)
Last such locator decoded
2026-08-29 23:52 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 UTCBandK4ZW S/NCounterpartCounterpart S/NMsgsCapture
08-30 00:07 80m - / -17 EB4SM -12 / - 4 Partial capture
08-30 00:07 80m - / - F4BYA 0 / - 4 Partial capture
08-30 00:06 80m - / - PG9S -12 / - 4 Partial capture
08-30 00:05 80m - / - DO1DX 0 / - 8 Partial capture
08-30 00:02 80m - / - DO5HOK -1 / - 3 Partial capture
08-30 00:02 80m - / -23 LZ2VQ -6 / - 11 Partial capture
08-29 23:57 80m - / - DO1DX -3 / - 3 Partial capture
08-29 23:52 40m -7 / - RD7O -14 / -15 4 Partial capture
08-29 23:52 40m -5 / - K0PG - / - 5 Partial capture
08-29 23:50 40m -6 / -1 MI7XHT -18 / -4 4 ✓ Full exchange observed
08-29 23:50 40m -6 / - KD2WBX - / - 2 ✓ Closing fragment
08-29 23:47 40m -8 / - DL1FOB - / -10 2 ✓ Closing fragment
08-29 23:45 40m -6 / - EA4LL - / -7 4 ✓ Closing fragment
08-29 23:44 40m - / - EI7IN -2 / - 8 Partial capture
08-29 23:43 40m -6 / - MM0DXL -16 / -18 4 ✓ Full exchange observed
08-29 23:43 40m - / - M7LYG -12 / - 4 Partial capture
08-29 23:42 40m -6 / - OK2UPY/P - / -8 3 ✓ Closing fragment
08-29 23:41 40m - / - YB5QZ -10 / - 7 Partial capture
08-29 23:40 40m -5 / - AC0M - / -9 3 ✓ Closing fragment
08-29 23:38 40m -17 / - N8HRZ - / +4 2 ✓ Closing fragment
08-29 23:38 40m - / - RD7O -18 / - 2 Partial capture
08-29 23:36 40m -18 / - AC9HP - / -5 2 ✓ Closing fragment
08-29 23:35 40m -18 / - W5GFM - / - 2 ✓ Closing fragment
08-29 23:34 40m -20 / - KF9UG - / +7 2 ✓ Closing fragment
08-22 00:50 80m -17 / -10 F5NNN -7 / -14 3 ✓ Full exchange observed
08-22 00:48 80m - / -11 DL9KM -2 / - 8 Partial capture
08-22 00:47 80m - / -18 UA3AVY +5 / - 8 Partial capture
08-22 00:46 80m - / -18 SP2WGB +7 / - 3 ✓ Closing fragment
08-22 00:43 80m - / -10 F5RRS +5 / - 3 ✓ Closing fragment
08-22 00:41 80m - / -3 DO3KTY +8 / - 3 ✓ Closing fragment
08-22 00:41 80m - / +6 DO9BAU +11 / - 9 ✓ Closing fragment
08-22 00:41 80m - / -3 OG1AO -8 / - 2 Partial capture
08-22 00:41 80m -17 / - EA5HM -8 / -15 2 ✓ Closing observed
08-22 00:40 80m - / -5 SV8JE -1 / - 5 ✓ Closing fragment
08-22 00:39 80m - / - R4WQ -14 / - 2 Partial capture
08-22 00:39 80m - / - UT7UA +18 / - 6 Partial capture
08-22 00:38 80m - / - YT1DDL 0 / - 3 Partial capture
08-22 00:37 80m - / - 9A4ZM -2 / - 3 Partial capture
08-22 00:33 80m - / -16 DL8HXP -4 / - 4 ✓ Closing fragment
08-22 00:30 40m - / - R8PD -12 / - 2 Partial capture
08-22 00:28 80m -19 / -17 RX6DA +2 / -17 5 ✓ Full exchange observed
08-22 00:27 80m - / -15 I1YDT -6 / - 8 Partial capture
08-22 00:27 80m -17 / -5 G4UJS -4 / -13 3 ✓ Full exchange observed
08-22 00:26 40m - / - R8PD -14 / - 4 Partial capture
08-22 00:24 40m - / - 9A4ZM -10 / - 4 Partial capture
08-22 00:24 40m - / - DK7ZT -14 / - 3 Partial capture
08-22 00:24 40m - / - F5RRS -1 / - 5 Partial capture
08-22 00:24 40m -2 / -7 R2RCQ -18 / -15 6 ✓ Full exchange observed
08-22 00:23 40m 0 / - F6FDY -3 / -12 5 ✓ Full exchange observed
08-22 00:22 40m 0 / -6 F8NHF +7 / 0 6 ✓ Full exchange observed

Recent FT8 messages decoded at SO8OO

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

80m 
UTC    dB Audio  Message
000745  +2 2849  K4ZW F4BYA JN19
000745 -11 1476  K4ZW EB4SM IN80
000745  +1  384  K4ZW DO1DX JO30
000815 -13 2767  K4ZW PG9S JO32
000815  -7 1608  K4ZW LZ2VQ R-25
000815  +1 2849  K4ZW F4BYA JN19
000815 -14 1476  K4ZW EB4SM IN80
000815  -2  378  K4ZW DO1DX JO30
000845 -14 2767  K4ZW PG9S JO32
000845  -6 1608  K4ZW LZ2VQ R-25
000845  +1 2849  K4ZW F4BYA JN19
000845 -14 1476  K4ZW EB4SM IN80
000845  -1  378  K4ZW DO1DX JO30
000915 -11 1476  K4ZW EB4SM R-17
000915  +1  378  K4ZW DO1DX JO30
40m 
UTC    dB Audio  Message
235045 -17 2159  K4ZW MI7XHT IO64
235100  -7 1646  MI7XHT K4ZW -04
235115 -18 2159  K4ZW MI7XHT R-01
235130  -5 1646  MI7XHT K4ZW RR73
235145  -5 2922  K4ZW DL1ESZ JO31
235200  -5 1646  CQ K4ZW FM18
235230  -6 1646  K0PG K4ZW +16
235245 -13 2091  K4ZW RD7O KN98
235300  -6 1647  K0PG K4ZW +16 (x3)
235415 -15 2091  K4ZW RD7O KN98
235430  -5 1646  K0PG K4ZW +16
235500  -6 1647  RD7O K4ZW -15 (x2)

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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