KR4EZM — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: United States Most frequent locator attributed to this token: EM80

Receiver-side FT8 activity involving KR4EZM, decoded by SO8OO in southeastern Poland. 27 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, across 4 UTC dates in the available aggregate history. Observed between 2026-06-13 and 2026-06-19.

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 27 FT8 messages attributed to KR4EZM as the transmitting token by decoded message structure across 4 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (85%), followed by 80 m (11%) and 40 m (4%). Several six-hour UTC windows tied for the largest share (100%), so no unique busiest interval is claimed. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -9 dB.

Overview

27
Messages attributed
4
UTC dates decoded
6
Active 15-min windows
-9 dB
Estimated median S/N

Bands

80m · 3 40m · 1 20m · 23
First attributed message: 2026-06-13
Last attributed message: 2026-06-19 01:37 UTC

Observed FT8 message patterns

Attributed sample
27 messages
Active dates
4 UTC dates
Estimated median S/N
-9 dB
Estimated 10th-90th percentile
-20 to -6 dB
Recurring-pattern threshold
Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 7, moderate (-15 to -9 dB) 11, strong (≥ -8 dB) 9.

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 KR4EZM in decoded directed-looking exchanges:

Most frequent locator attributed to KR4EZM

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
EM80 · 2 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
8,418 km (approx.)
Last such locator decoded
2026-06-16 01:21 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 UTCBandKR4EZM S/NCounterpartCounterpart S/NMsgsCapture
08-11 23:00 40m - / -21 <...> -13 / - 5 Partial capture
08-08 02:36 40m - / 0 PI4DX +4 / - 2 ✓ Closing fragment
08-08 02:28 80m - / - HB9CXZ +10 / - 4 Partial capture
08-08 01:22 40m - / -14 9K2GR -16 / - 2 ✓ Closing fragment
08-06 03:56 20m - / -22 <...> -2 / - 9 Partial capture
08-06 00:29 40m - / -12 MI0NWA -4 / - 2 Partial capture
08-02 23:56 40m - / +10 W4DXM -11 / - 2 ✓ Closing fragment
08-02 01:47 40m - / -25 G5TV -22 / - 2 Partial capture
08-02 01:47 40m - / - OH1MRE 0 / - 2 Partial capture
07-30 02:58 40m - / -12 OZ1KEF -4 / - 2 ✓ Closing fragment
07-30 02:22 20m - / -15 UA9CK -15 / - 3 ✓ Closing fragment
07-29 00:59 40m - / -13 RN3YN -11 / - 6 Partial capture
07-26 02:34 40m - / -10 LZ1KU -3 / - 2 ✓ Closing fragment
07-23 02:15 20m - / -3 A61QQ -9 / - 2 ✓ Closing fragment
07-22 02:49 20m - / -20 RX9ABI -1 / - 6 ✓ Closing fragment
07-22 02:48 20m - / -15 HZ1TT -3 / - 2 ✓ Closing fragment
07-18 01:42 40m - / - LA7DMA -16 / - 2 ✓ Closing fragment
07-13 08:24 20m - / - HB9TIH -19 / - 3 Partial capture
07-13 01:30 40m - / -13 PD2TX -10 / - 2 Partial capture
07-11 01:57 80m - / - F5MYK -8 / - 2 Partial capture
07-11 01:47 80m - / - HB9CXZ +9 / - 5 Partial capture
07-11 01:46 80m - / -9 KB1EFS -12 / - 2 ✓ Closing fragment
07-10 02:29 40m - / -10 ON7EQ -4 / - 2 ✓ Closing fragment
07-05 23:21 20m - / -12 OE8DDX -10 / - 2 Partial capture
07-04 02:19 80m - / - EA3HMM -16 / - 3 Partial capture
07-03 02:17 20m - / -12 TM13COL -16 / - 2 Partial capture
07-03 01:17 80m - / - K2B -16 / - 2 ✓ Closing fragment
06-29 05:26 40m - / - IK2ZJR -16 / - 2 ✓ Closing fragment
06-29 01:30 40m - / -13 <...> -17 / - 7 Partial capture
06-29 01:28 40m - / -12 EK/RX3DPK -13 / - 4 Partial capture
06-23 10:26 20m - / -17 G4IIY -13 / - 3 ✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

40m 
UTC    dB Audio  Message
014745 -24 1647  KR4EZM G5TV R-25
235600 -11 1164  KR4EZM W4DXM +10 (x2)
235900 -22 1866  KR4EZM F5PBG IN78
002930  -4  769  KR4EZM MI0NWA -12 (x2)
012200 -15 1857  KR4EZM 9K2GR -14 (x2)
023615  +4 1017  KR4EZM PI4DX +00 (x2)
230030 -12 1539  KR4EZM <...> -21 (x5)
80m 
UTC    dB Audio  Message
021930 -16  248  KR4EZM EA3HMM JN00 (x2)
014630 -11  933  KR4EZM KB1EFS -09 (x2)
014730 +12 1973  KR4EZM HB9CXZ JN46 (x5)
015700 -10 2208  KR4EZM F5MYK IN97 (x2)
022800 +14 2139  KR4EZM HB9CXZ JN46 (x4)
20m 
UTC    dB Audio  Message
111630 -22 1891  KR4EZM EI2KP 73
083945  -6 3002  KR4EZM <...> R-14
022200 -20 1626  KR4EZM UA9CK R-15 (x3)
022630 -16 1160  KR4EZM RA3RDN LO02
035600  -1 2747  KR4EZM <...> -22 (x9)

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