W4DXM — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: United States Most frequent locator attributed to this token: EL97

Receiver-side FT8 activity involving W4DXM, decoded by SO8OO in southeastern Poland. 3,058 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, across 44 UTC dates in the available aggregate history. Observed between 2026-07-02 and 2026-09-17.

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 3,058 FT8 messages attributed to W4DXM as the transmitting token by decoded message structure across 44 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (50%), followed by 40 m (46%) and 80 m (5%). Most decodes (93%) fell within the six-hour window 22:00-04:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -10 dB.

Overview

3,058
Messages attributed
44
UTC dates decoded
244
Active 15-min windows
-10 dB
Estimated median S/N

Bands

80m · 142 40m · 1,399 20m · 1,517
First attributed message: 2026-07-02
Last attributed message: 2026-09-17 02:11 UTC

Observed FT8 message patterns

Attributed sample
3,058 messages
Active dates
44 UTC dates
Estimated median S/N
-10 dB
Estimated 10th-90th percentile
-16 to -1 dB
Recurring-pattern threshold
Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 388, moderate (-15 to -9 dB) 1,323, strong (≥ -8 dB) 1,347.

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 W4DXM 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 W4DXM

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
EL97 · 1,170 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
8,549 km (approx.)
Last such locator decoded
2026-09-17 02:09 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 UTCBandW4DXM S/NCounterpartCounterpart S/NMsgsCapture
09-17 02:11 40m -16 / - N2FSM - / -18 2 ✓ Closing fragment
09-17 02:09 40m -16 / - KN4WOJ - / -5 2 ✓ Closing fragment
09-17 02:07 40m - / - TA2EE -10 / - 6 Partial capture
09-16 01:29 40m -21 / - NE5RO - / -8 3 ✓ Closing fragment
09-16 01:18 40m -16 / -11 R9OOF -1 / -19 7 ✓ Full exchange observed
09-16 01:18 40m -18 / - UA4FKT - / -21 2 ✓ Closing fragment
09-16 01:16 40m -17 / - IK4TVP - / -17 2 ✓ Closing fragment
09-16 01:14 40m -16 / - KG9OH - / -21 2 ✓ Closing fragment
09-16 01:13 40m - / -13 F4CQS -2 / - 2 Partial capture
09-15 01:53 40m -18 / - P38IFI - / -13 3 Partial capture
09-15 01:43 40m - / - TA3NK -2 / - 6 Partial capture
09-15 01:43 40m - / - UB4FGK +3 / - 3 Partial capture
09-13 00:59 40m - / -16 EA3AKY 0 / - 5 ✓ Closing fragment
09-10 00:05 40m - / - M9PJC 0 / - 3 Partial capture
09-10 00:04 40m - / -10 M7YFL -12 / - 3 Partial capture
09-09 23:55 40m - / - M9PJC -4 / - 3 Partial capture
09-09 23:54 40m - / - M0PEL -2 / - 2 Partial capture
09-08 00:18 40m - / - R9LE -10 / - 2 Partial capture
09-08 00:08 40m - / - UR9QQ -13 / - 3 Partial capture
09-08 00:06 40m -17 / - WB3FME - / -16 2 Partial capture
09-08 00:04 40m -18 / - LU6WAV - / -16 2 ✓ Closing fragment
09-07 23:56 40m - / - CT7ARQ -17 / - 6 Partial capture
09-07 23:56 40m -11 / -18 IK2XDE -11 / - 8 ✓ Closing observed
08-30 22:05 20m 0 / - IK2LRF - / -6 2 Partial capture
08-30 22:04 20m +2 / - AC2Y - / -7 2 ✓ Closing fragment
08-30 22:03 20m - / +8 CT2KCK -3 / - 4 Partial capture
08-30 21:57 20m 0 / - K4YJ - / -12 2 Partial capture
08-30 21:55 20m - / - M7XEI -21 / - 2 Partial capture
08-30 21:54 20m 0 / - WJ9Q - / +2 2 ✓ Closing fragment
08-30 21:50 20m +2 / +7 DL1LN -6 / -12 7 ✓ Full exchange observed
08-30 21:50 20m +3 / - MI7YDB -5 / -8 3 Partial capture
08-30 21:48 20m +2 / - G8WMZ - / -19 2 Partial capture
08-30 21:44 20m 0 / - N2FSM - / -9 2 ✓ Closing fragment
08-30 21:42 20m - / - EA1FJV -6 / - 3 Partial capture
08-30 21:41 20m -1 / - N3LH - / -10 2 ✓ Closing fragment
08-30 21:38 20m 0 / +7 DM4GG -1 / -4 5 ✓ Full exchange observed
08-30 21:35 20m -3 / - OK1TI - / -14 3 ✓ Closing fragment
08-30 21:34 20m -2 / - VA3DVY - / -2 4 ✓ Closing fragment
08-30 21:30 20m -2 / - ZS6OB - / -7 2 Partial capture
08-30 21:27 20m +6 / - KF0ARM - / -6 2 Partial capture
08-30 21:26 20m - / - MW1CFA +3 / - 9 Partial capture
08-30 21:21 20m +6 / - K4GRI -14 / -21 3 Partial capture
08-30 21:20 20m +2 / +7 EA1FQC -4 / -9 3 Partial capture
08-30 21:19 20m +4 / - DL7RAY - / -13 2 ✓ Closing fragment
08-30 21:17 20m - / - MW1CFA -2 / - 2 Partial capture
08-30 21:14 20m -2 / - SP5WCK - / -9 2 ✓ Closing fragment
08-30 21:14 20m +1 / -4 5Z4VJ -8 / - 2 ✓ Closing observed
08-30 21:12 20m -2 / - SP2LPI - / -12 2 Partial capture
08-30 21:09 20m - / - EA5HM -10 / - 3 Partial capture
08-30 21:09 20m -6 / - SP4FCA - / -12 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
013045 -21 2124  NE5RO W4DXM RR73
020100 -18 1195  CQ W4DXM EL97
020730 -24 1394  WA2AC W4DXM 73
020745  -6  897  W4DXM TA2EE KM69 (x2)
020830 -13  977  CQ W4DXM EL97                         a1 (x2)
020915 -11  898  W4DXM TA2EE KM69
020930 -18  977  KN4WOJ W4DXM -05
020945 -17  899  W4DXM TA2EE KM69
021000 -15  977  KN4WOJ W4DXM RR73
021015  -7  898  W4DXM TA2EE KM69 (x2)
021100 -16  977  N2FSM W4DXM R-18 (x2)
20m 
UTC    dB Audio  Message
220030  +0 1952  CQ W4DXM EL97 (x2)
220130  +3 1952  W9ML W4DXM +08
220230  +2 1952  M9LDX W4DXM -13
220300  +3 1952  CQ W4DXM EL97
220315  -4 1952  W4DXM CT2KCK IM59
220330  +3 1952  CQ W4DXM EL97
220345  -5 1953  W4DXM CT2KCK IM59
220400  +5 1952  CQ W4DXM EL97
220415  -1 1953  W4DXM CT2KCK +08
220430  +2 1952  AC2Y W4DXM -07
220445  -2 1953  W4DXM CT2KCK +08
220530  +0 1952  IK2LRF W4DXM -06 (x2)
220630  +1 1952  AC2Y W4DXM RR73
80m 
UTC    dB Audio  Message
012845 -12  201  W4DXM G8OO JO02
012900 -22 1006  CQ W4DXM EL97
012915 +12 2649  W4DXM IQ4JO JN63
012915 +22 2953  W4DXM HA9OA KN08
012915  -8  201  W4DXM G8OO JO02
012930 -24 1006  CQ W4DXM EL97
012945  -5  201  W4DXM G8OO JO02
012945  +8 1004  W4DXM DO1OAS -24
013045  -6  201  W4DXM G8OO JO02
013045  +9 1004  W4DXM DO1OAS -24 (x3)
225030 -15 2102  W4DXM OE2AGZ JN67 (x3)
10m 
UTC    dB Audio  Message
135245  -8  830  W4DXM DK5TX JO41
140245 -16 1201  W4DXM PD2VE -15

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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