JG3WJN — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Japan Most frequent locator attributed to this token: PM74

Receiver-side FT8 activity involving JG3WJN, decoded by SO8OO in southeastern Poland. 97 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, across 14 UTC dates in the available aggregate history. Observed between 2026-06-17 and 2026-09-21.

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 97 FT8 messages attributed to JG3WJN as the transmitting token by decoded message structure across 14 UTC dates in the available aggregate history. The largest monitored-band total was 80 m (67%), followed by 40 m (25%) and 20 m (8%). Most decodes (99%) fell within the six-hour window 19:00-01:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -11 dB.

Overview

97
Messages attributed
14
UTC dates decoded
31
Active 15-min windows
-11 dB
Estimated median S/N

Bands

First attributed message: 2026-06-17
Last attributed message: 2026-09-21 00:38 UTC

Observed FT8 message patterns

Attributed sample
97 messages
Active dates
14 UTC dates
Estimated median S/N
-11 dB
Estimated 10th-90th percentile
-21 to -4 dB
Recurring-pattern threshold
Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 25, moderate (-15 to -9 dB) 41, strong (≥ -8 dB) 31.

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 JG3WJN 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 JG3WJN

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
PM74 · 72 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
8,565 km (approx.)
Last such locator decoded
2026-09-21 00:38 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 UTCBandJG3WJN S/NCounterpartCounterpart S/NMsgsCapture
09-21 00:37 80m -9 / - RI1FJZ - / - 2 Partial capture
09-21 00:29 80m -6 / - RI1FJZ - / -22 4 Partial capture
09-21 00:25 80m -6 / - RI1FJZ - / -22 4 Partial capture
09-20 23:46 80m -7 / - RI1FJZ - / -22 4 Partial capture
09-20 23:28 80m -15 / - RI1FJZ - / -22 3 Partial capture
09-06 00:36 80m - / - UA3ZNQ +9 / - 3 Partial capture
09-06 00:34 80m - / -9 ON6AA +7 / - 3 ✓ Closing fragment
09-06 00:34 80m - / - UA4FKT +14 / - 5 Partial capture
09-06 00:28 80m - / -4 ON6AA +4 / - 2 Partial capture
09-06 00:23 80m - / - DH1KJ +5 / - 2 Partial capture
09-06 00:21 80m -1 / -4 ON6AA +11 / -24 6 Partial capture
09-06 00:21 80m -8 / - VP8A - / - 5 Partial capture
09-01 21:20 80m - / -19 F6CTT +6 / - 3 Partial capture
09-01 21:20 80m - / -14 RU3ACA +4 / - 2 Partial capture
09-01 21:20 80m - / - G4ZFJ -6 / - 3 Partial capture
09-01 21:20 80m - / - SP5AA +4 / - 4 Partial capture
09-01 21:19 80m - / -24 SP6FME +12 / - 3 Partial capture
09-01 21:19 80m -9 / -8 EI4KF +13 / - 3 ✓ Closing observed
09-01 21:16 80m - / - IZ5IMD -3 / - 2 Partial capture
09-01 21:16 80m - / - SP6FME +19 / - 3 Partial capture
09-01 21:16 80m - / - SP9FZH +7 / - 3 Partial capture
09-01 21:14 80m -14 / - V51PJ - / -22 4 Partial capture
09-01 21:13 80m - / - UA1AIR -8 / - 2 Partial capture
09-01 21:12 80m - / - SP9FZH +12 / - 4 Partial capture
08-31 22:37 40m -9 / - RI1FJL - / -22 2 Partial capture
08-31 22:21 40m - / -8 UA9CR -4 / - 3 ✓ Closing fragment
08-31 22:18 40m -9 / - RI1FJL - / - 3 Partial capture
08-31 21:54 40m - / -8 IZ8EYN -11 / - 4 Partial capture
08-31 21:54 40m - / - UR9QQ -4 / - 2 Partial capture
08-31 21:53 40m -6 / -4 HA9PP -15 / -18 2 Partial capture
08-31 21:48 40m - / - HA9PP -16 / - 2 Partial capture
08-31 21:40 40m -11 / - RI1FJL - / -22 2 Partial capture
08-31 20:55 40m -12 / - RI1FJL - / -22 2 Partial capture
08-31 20:28 40m -14 / - RI1FJL - / - 2 Partial capture
08-29 22:43 40m -11 / - RI1FJL - / - 3 Partial capture
08-29 22:29 40m - / - IU0NAD +6 / - 3 Partial capture
08-29 22:28 40m -8 / - RI1FJL - / -22 3 Partial capture
08-29 22:21 40m -8 / - RI1FJL - / -22 3 Partial capture
08-29 22:14 40m -9 / - RI1FJL - / - 3 Partial capture
08-29 21:44 80m -12 / - RI1FJL - / - 2 Partial capture
08-29 21:16 80m - / - DO7BE -6 / - 5 Partial capture
08-29 21:16 80m - / - EA3FCQ -7 / - 3 Partial capture
08-29 21:14 80m -19 / - RI1FJL - / -22 3 Partial capture
08-29 21:10 80m - / - EA3FCQ -1 / - 3 Partial capture
08-29 21:07 80m - / - DF8TS +1 / - 4 Partial capture
08-29 21:02 80m - / - EA3FCQ -1 / - 5 Partial capture
08-29 20:05 80m - / - IW2DNI -3 / - 3 Partial capture
08-29 20:00 80m - / - ON4IQ +19 / - 4 Partial capture
08-17 04:53 20m - / -26 R9FDE/P -21 / - 5 Partial capture
08-12 01:05 80m - / -14 WB8SCG -14 / - 2 Partial capture

Recent FT8 messages decoded at SO8OO

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

80m
UTC    dB Audio  Message
234645  -4 2615  RI1FJZ JG3WJN PM74 (x14)
003830 -15 1481  JG3WJN CT7AUT IM67
40m
UTC    dB Audio  Message
215400 -12  762  JG3WJN IZ8EYN -08
215430  -6 1395  JG3WJN UR9QQ KN77
215430 -10  762  JG3WJN IZ8EYN -08 (x2)
215530 -10 2613  JG3WJN UN7EAX MO52
215530 -12  762  JG3WJN IZ8EYN -08
215700  -7 2648  JG3WJN OM3PR JN87
221845  -9 2648  RI1FJL JG3WJN PM74 (x3)
222100  -5 2498  JG3WJN UA9CR -08 (x3)
223715 -10 2648  RI1FJL JG3WJN PM74 (x2)
20m
UTC    dB Audio  Message
191015 -11 2684  TN8GD JG3WJN PM74 (x2)
045300 -22 1686  JG3WJN R9FDE/P R-26 (x5)

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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