W4RXK — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: United States Most frequent locator attributed to this token: EM74

Receiver-side FT8 activity involving W4RXK, decoded by SO8OO in southeastern Poland. 22 FT8 messages attributed to this token as transmitter, on 80m, 20m, across 6 UTC dates in the available aggregate history. Observed between 2026-06-08 and 2026-08-16.

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 22 FT8 messages attributed to W4RXK as the transmitting token by decoded message structure across 6 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (95%), followed by 80 m (5%). Several six-hour UTC windows tied for the largest share (100%), so no unique busiest interval is claimed. Most successfully decoded messages attributed to this token fell in SO8OO's weak S/N range (73%); the estimated median was -19 dB.

Overview

22
Messages attributed
6
UTC dates decoded
8
Active 15-min windows
-19 dB
Estimated median S/N

Bands

80m · 1 20m · 21
First attributed message: 2026-06-08
Last attributed message: 2026-08-16 02:14 UTC

Observed FT8 message patterns

Attributed sample
22 messages
Active dates
6 UTC dates
Estimated median S/N
-19 dB
Estimated 10th-90th percentile
-21 to -15 dB
Recurring-pattern threshold
Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 16, moderate (-15 to -9 dB) 6, 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.

Frequent counterpart tokens observed at SO8OO

Tokens most often paired with W4RXK in decoded directed-looking exchanges:

Most frequent locator attributed to W4RXK

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
EM74 · 16 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
8,198 km (approx.)
Last such locator decoded
2026-08-16 02:14 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 UTCBandW4RXK S/NCounterpartCounterpart S/NMsgsCapture
09-17 00:24 80m - / -22 LZ1KU +14 / - 2 Partial capture
09-16 01:03 80m - / -19 F5UKW +14 / - 2 ✓ Closing fragment
09-12 01:03 40m - / -24 HZ1TT -10 / - 3 ✓ Closing fragment
08-28 00:43 80m - / -22 LZ1KU +18 / - 2 ✓ Closing fragment
08-25 01:05 40m - / -13 M0ILT -10 / - 2 ✓ Closing fragment
08-22 02:29 80m - / -25 SP6JIU +25 / - 3 Partial capture
08-21 23:58 40m - / - CT2IGO -14 / - 7 ✓ Closing fragment
08-21 23:51 40m - / -19 CT2IGO -12 / - 2 Partial capture
08-21 00:25 20m - / -19 PY6HD 0 / - 2 Partial capture
08-19 01:15 40m - / - F5NBU +6 / - 4 Partial capture
08-16 02:12 80m - / -18 RA2FCF -8 / - 4 ✓ Closing fragment
08-16 01:56 40m - / -12 F4IFO -8 / - 3 ✓ Closing fragment
08-11 00:57 80m - / - UR5EDX +10 / - 7 Partial capture
08-10 01:14 80m - / -18 SP1MGM +19 / - 3 ✓ Closing fragment
08-09 01:17 40m - / -16 9K2GR -18 / - 2 Partial capture
08-05 01:41 60m - / +5 DB3ZY -4 / - 4 ✓ Closing fragment
08-05 01:41 60m - / -12 DM8KM +4 / - 2 ✓ Closing fragment
08-04 00:38 60m - / -18 S58N -13 / - 4 ✓ Closing fragment
08-04 00:30 40m - / - 5B4ALJ -16 / - 2 Partial capture
08-01 21:58 20m - / - IW9HPG -3 / - 3 Partial capture
08-01 01:33 60m - / -16 DL8UD +4 / - 3 ✓ Closing fragment
07-29 02:03 40m - / -10 DM5KM +5 / - 2 ✓ Closing fragment
07-29 00:23 40m - / -15 SA3LEN -2 / - 3 ✓ Closing fragment
07-21 01:34 20m - / -11 7Z1BQ -20 / - 2 Partial capture
07-17 01:53 40m - / -12 DK7ZT -19 / - 3 Partial capture
07-17 00:38 20m - / -23 HZ1TT -7 / - 3 ✓ Closing fragment
07-07 01:08 20m - / - HB9TIH -15 / - 5 Partial capture
07-07 00:09 40m - / -16 EC5JC -6 / - 2 ✓ Closing fragment
06-25 01:48 80m - / -21 CE3SPR -14 / - 4 Partial capture
06-24 01:06 40m - / -19 DK7ZT -9 / - 4 Partial capture

Recent FT8 messages decoded at SO8OO

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

80m 
UTC    dB Audio  Message
010115 +11 2106  W4RXK UR5EDX KN78
021200 -24 1786  W4RXK RA2FCF -18 (x4)
021415 -18 2838  SP6JIU W4RXK EM74
022900 +24 2808  W4RXK SP6JIU -25 (x3)
004330 +16 1268  W4RXK LZ1KU -22 (x2)
010345 +14 2634  W4RXK F5UKW -19 (x2)
002430 +11 1431  W4RXK LZ1KU -22 (x2)
40m 
UTC    dB Audio  Message
235100 -12 1551  W4RXK CT2IGO -19 (x9)
010500 -10 1783  W4RXK M0ILT -13 (x2)
000945  -1 2979  W4RXK RD9U RR73
010330  -7 1729  W4RXK HZ1TT -24 (x3)
20m 
UTC    dB Audio  Message
010915 -19 1788  W4RXK HB9TIH JN36 (x3)
003845  -5 1761  W4RXK HZ1TT -23 (x3)
212900  -5  929  W4RXK DF7PX -10
013415 -20 1915  W4RXK 7Z1BQ -11 (x2)
215800  -1 1050  W4RXK IW9HPG JM78 (x3)
002545  +1 2175  W4RXK PY6HD -19 (x2)
235745 -23 1775  W4RXK 9Y4DG -12
60m 
UTC    dB Audio  Message
013330  +1 1308  W4RXK DL8UD -16 (x3)
003645  -1  982  W4RXK G7KHF -17
003815  -6  738  W4RXK S58N JN76 (x4)
014115  +1 2764  W4RXK DM8KM -12 (x2)
014145  -5 1574  W4RXK DB3ZY JO40 (x4)
015100 -15  929  W4RXK GB8VJ RR73

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