JA3VXM — 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: Japan Most frequent locator attributed to this token: PM75

Receiver-side FT8 activity involving JA3VXM, decoded by SO8OO in southeastern Poland. 9 FT8 messages attributed to this token as transmitter, on 20m, across 5 UTC dates in the available aggregate history. Observed between 2026-06-06 and 2026-06-17.

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 9 FT8 messages attributed to JA3VXM as the transmitting token by decoded message structure across 5 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (100%). In this small sample, the estimated median decoder S/N was -15 dB; no usual signal pattern is inferred.

Overview

9
Messages attributed
5
UTC dates decoded
5
Active 15-min windows
-15 dB
Estimated median S/N

Bands

20m · 9
First attributed message: 2026-06-06
Last attributed message: 2026-06-17 18:56 UTC

Observed FT8 message patterns

Attributed sample
9 messages
Active dates
5 UTC dates
Estimated median S/N
-15 dB
S/N percentile sample
Too small
Recurring-pattern threshold
Not met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 4, moderate (-15 to -9 dB) 3, strong (≥ -8 dB) 2.

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 JA3VXM in decoded directed-looking exchanges:

Most frequent locator attributed to JA3VXM

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
PM75 · 2 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
8,477 km (approx.)
Last such locator decoded
2026-06-16 18:16 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 UTCBandJA3VXM S/NCounterpartCounterpart S/NMsgsCapture
10-15 15:24 40m - / -13 UZ5ZU +1 / - 3 ✓ Closing fragment
10-15 15:09 40m - / -9 UA9SHH -14 / - 2 ✓ Closing fragment
10-13 16:59 40m - / -15 RM5F -6 / - 2 ✓ Closing fragment
10-13 16:36 40m - / -11 RM1B +2 / - 2 ✓ Closing fragment
10-13 16:30 40m - / -9 RC3D +3 / - 3 ✓ Closing fragment
10-13 16:28 40m - / -12 R7NK -2 / - 2 ✓ Closing fragment
10-12 18:09 40m - / -14 RC9WC -13 / - 2 Partial capture
10-12 18:05 40m - / -13 DL9AJ +5 / - 3 ✓ Closing fragment
10-11 18:37 40m - / -10 LZ2XA +6 / - 2 ✓ Closing fragment
10-10 15:25 40m - / -14 LZ936BA -4 / - 2 Partial capture
10-10 15:16 40m - / -17 RA6LO -4 / - 3 ✓ Closing fragment
10-10 15:09 40m - / - UA4FKT +7 / - 3 Partial capture
09-27 19:24 40m - / - Z34K +5 / - 2 Partial capture
09-05 19:58 40m - / -18 RN3ZBX +10 / - 2 ✓ Closing fragment
09-05 19:47 40m - / -21 OZ7KJ/P +10 / - 2 ✓ Closing fragment
08-30 18:46 40m - / -17 EA7ALL +5 / - 5 ✓ Closing fragment
08-26 17:39 40m - / -9 UR1CCT +18 / - 3 ✓ Closing fragment
08-26 17:37 40m - / - LB7ZG -10 / - 2 Partial capture
08-24 18:57 20m - / -15 ON7NQ -1 / - 3 ✓ Closing fragment
08-24 18:47 20m - / -17 ON4IQ +15 / - 3 ✓ Closing fragment
08-22 20:15 40m - / -8 UT6HN +4 / - 3 ✓ Closing fragment
08-22 20:14 40m - / -14 ON4IQ +18 / - 3 ✓ Closing fragment
08-18 19:34 40m - / -25 SP6JIU +24 / - 2 ✓ Closing fragment
08-17 19:28 40m - / -15 SP6JIU +20 / - 3 Partial capture
08-07 17:42 40m - / -21 RK3DWA/3 -14 / - 4 Partial capture
07-30 19:08 20m - / -11 R4FDW -16 / - 2 ✓ Closing fragment
07-30 19:00 20m - / -11 R3NCG -8 / - 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
163030  +3 2687  JA3VXM RC3D -09 (x3)
163630  +0  357  JA3VXM RM1B -11 (x2)
165915  -7 1684  JA3VXM RM5F -15 (x2)
150900 -13 2147  JA3VXM UA9SHH -09 (x2)
152415  +3  754  JA3VXM UZ5ZU -13 (x3)
152915 -16 2314  JA3VXM RT8T -18
162200  +6  625  JA3VXM IK3/UY7LA -10
185000 +14  257  JA3VXM Z34K KN01
20m 
UTC    dB Audio  Message
190015  -8 1857  JA3VXM R3NCG -11 (x2)
190845 -14 1682  JA3VXM R4FDW -11
190845  -8 2756  JA3VXM IU2CAT JN45
190915 -17 1682  JA3VXM R4FDW RR73
184745 +18 2375  JA3VXM ON4IQ JO20 (x3)
185745  +3 2598  JA3VXM ON7NQ JO21 (x3)

CW

No CW receptions recorded for this callsign in the last 30 days.

Explore CW reception at SO8OO

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