W7MTH — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: United States Most frequent locator attributed to this token: CN97

Receiver-side FT8 activity involving W7MTH, decoded by SO8OO in southeastern Poland. 67 FT8 messages attributed to this token as transmitter, on 20m, across 3 UTC dates in the available aggregate history. Observed between 2026-06-13 and 2026-08-24.

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 67 FT8 messages attributed to W7MTH as the transmitting token by decoded message structure across 3 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (100%). 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 -6 dB.

Overview

67
Messages attributed
3
UTC dates decoded
10
Active 15-min windows
-6 dB
Estimated median S/N

Bands

20m · 67
First attributed message: 2026-06-13
Last attributed message: 2026-08-24 05:50 UTC

Observed FT8 message patterns

Attributed sample
67 messages
Active dates
3 UTC dates
Estimated median S/N
-6 dB
Estimated 10th-90th percentile
-17 to +1 dB
Recurring-pattern threshold
Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 11, moderate (-15 to -9 dB) 19, strong (≥ -8 dB) 37.

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 W7MTH in decoded directed-looking exchanges:

Most frequent locator attributed to W7MTH

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
CN97 · 24 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
8,608 km (approx.)
Last such locator decoded
2026-08-24 05:50 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 UTCBandW7MTH S/NCounterpartCounterpart S/NMsgsCapture
09-18 05:15 40m - / -18 LX1TI 0 / - 2 ✓ Closing fragment
08-24 05:57 20m - / - F5RAV -17 / - 2 Partial capture
08-24 05:56 20m - / -13 R2SN -8 / - 2 ✓ Closing fragment
08-24 05:54 20m - / - F5RAV -20 / - 2 Partial capture
08-24 05:53 20m - / -12 UA3GDJ +4 / - 3 ✓ Closing fragment
08-24 05:52 20m - / -15 IZ0MIO -16 / - 3 ✓ Closing fragment
08-24 05:49 20m - / - IZ0MIO -8 / - 2 Partial capture
08-24 05:46 20m - / - F5RAV -22 / - 3 Partial capture
08-24 05:44 20m - / -11 R2SN +4 / - 2 ✓ Closing fragment
08-24 05:39 20m - / -12 R2SN +5 / - 2 Partial capture
08-24 05:39 20m - / -11 RV3QI -7 / - 6 ✓ Closing fragment
08-24 05:36 20m - / -15 IU6JEI +5 / - 6 ✓ Closing fragment
08-24 05:35 20m - / -12 RN6MA -2 / - 4 Partial capture
08-24 05:33 20m - / - I8/ON8SGA -8 / - 2 Partial capture
08-24 05:31 20m - / - R6AC +7 / - 2 Partial capture
08-24 05:30 20m - / - UA3GDJ +1 / - 6 Partial capture
08-24 05:28 20m -18 / - EA3EDU -6 / +10 4 ✓ Closing observed
08-24 05:26 20m - / - TA2EE -17 / - 2 Partial capture
08-24 05:25 20m -17 / - OK2CNI -17 / - 4 ✓ Closing observed
08-24 05:25 20m -14 / - F4LNM - / - 2 ✓ Closing fragment
08-24 05:25 20m - / - RU4LM +5 / - 3 Partial capture
08-24 05:24 20m -14 / - UX0KR - / +5 2 ✓ Closing fragment
08-24 05:21 20m -14 / -10 MM0JTV -11 / -11 7 ✓ Full exchange observed
08-24 05:20 20m -16 / -13 RU3QR -2 / -1 14 Partial capture
08-24 05:17 20m -10 / - HA5AQ - / 0 2 ✓ Closing fragment
08-24 05:14 20m -12 / - OZ1BLP - / - 2 ✓ Closing fragment
08-24 05:13 20m -16 / - DL3MIB -24 / -1 3 ✓ Closing observed
08-24 05:06 20m - / -17 R6TA +7 / - 5 ✓ Closing fragment
08-24 04:57 20m - / - EA4IDN -7 / - 6 Partial capture
08-24 04:57 20m - / -13 SV9COL -3 / - 4 ✓ Closing fragment
08-24 04:48 20m - / -11 SP5ATA -18 / - 4 Partial capture
08-20 04:40 20m - / -2 NI9D -24 / - 2 Partial capture
08-20 04:36 20m - / -23 UR3LM -4 / - 2 Partial capture
08-07 04:48 20m - / -14 F5RRS -8 / - 3 ✓ Closing fragment
08-07 04:22 20m - / -21 RD4A -13 / - 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
051515  +2 1081  W7MTH LX1TI R-18 (x2)
20m 
UTC    dB Audio  Message
054945 -10 1044  W7MTH IZ0MIO JN61
055000 -14  279  CQ DX W7MTH CN97
055215 -18  222  W7MTH IZ0MIO JN61 (x3)
055345  +1  280  W7MTH UA3GDJ KO92 (x2)
055415 -21 1350  W7MTH F5RAV JN09
055445 +10  280  W7MTH UA3GDJ 73
055445 -19 1350  W7MTH F5RAV JN09
055545  -3  279  W7MTH RN6MA -07
055645  -9  281  W7MTH R2SN -13 (x2)
055715 -10 1350  W7MTH F5RAV JN09 (x2)

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