JG5VFK — FT8 activity observed at SO8OO

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

Receiver-side FT8 activity involving JG5VFK, decoded by SO8OO in southeastern Poland. 39 FT8 messages attributed to this token as transmitter, on 20m, across 9 UTC dates in the available aggregate history. Observed between 2026-06-06 and 2026-07-25.

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 39 FT8 messages attributed to JG5VFK as the transmitting token by decoded message structure across 9 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. Most successfully decoded messages attributed to this token fell in SO8OO's weak S/N range (72%); the estimated median was -18 dB.

Overview

39
Messages attributed
9
UTC dates decoded
14
Active 15-min windows
-18 dB
Estimated median S/N

Bands

20m · 39
First attributed message: 2026-06-06
Last attributed message: 2026-07-25 16:41 UTC

Observed FT8 message patterns

Attributed sample
39 messages
Active dates
9 UTC dates
Estimated median S/N
-18 dB
Estimated 10th-90th percentile
-23 to -11 dB
Recurring-pattern threshold
Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 28, moderate (-15 to -9 dB) 8, strong (≥ -8 dB) 3.

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 JG5VFK in decoded directed-looking exchanges:

Most frequent locator attributed to JG5VFK

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 · 32 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
8,565 km (approx.)
Last such locator decoded
2026-06-18 18:23 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 UTCBandJG5VFK S/NCounterpartCounterpart S/NMsgsCapture
08-30 22:14 20m - / -15 F6FLU -10 / - 3 ✓ Closing fragment
08-30 15:54 20m - / -19 ON4AOI -1 / - 2 Partial capture
08-29 20:47 20m - / -15 F8AGD -2 / - 2 ✓ Closing fragment
08-29 20:02 20m - / -16 IK3SCB +8 / - 2 ✓ Closing fragment
08-29 10:09 20m - / -16 R4FDK -15 / - 3 ✓ Closing fragment
08-28 23:17 20m - / -15 IK4HLQ 0 / - 2 ✓ Closing fragment
08-28 21:58 20m - / - F4BYA +2 / - 3 Partial capture
08-28 21:50 20m - / - F4BYA +6 / - 3 Partial capture
08-28 21:41 20m - / -19 DG9SEH -2 / - 2 ✓ Closing fragment
08-28 14:09 20m - / -20 R3NBI -12 / - 2 ✓ Closing fragment
08-27 21:25 20m - / -22 IW1QQG -4 / - 2 Partial capture
08-27 21:16 20m - / - IW9FRA -10 / - 5 Partial capture
08-27 20:36 20m - / - SV1GYN +6 / - 8 Partial capture
08-27 19:04 20m - / - F1NQP +8 / - 2 Partial capture
08-27 18:51 20m - / - TA3NK +5 / - 10 Partial capture
08-27 18:22 20m - / -11 UA3SNB +3 / - 3 Partial capture
08-26 21:49 20m - / -24 IZ3GWJ +12 / - 9 Partial capture
08-26 21:42 20m - / -10 9A3TY -12 / - 2 ✓ Closing fragment
08-26 20:07 20m - / - R7OV -12 / - 2 Partial capture
08-25 21:44 20m - / -22 EA5OM +16 / - 3 ✓ Closing fragment
08-25 13:33 20m - / -11 UA3SNB +4 / - 3 Partial capture
08-24 17:51 20m - / -14 UA3SNB -11 / - 2 Partial capture
08-17 18:42 20m - / -14 ON4IQ +14 / - 2 ✓ Closing fragment
08-17 18:14 20m - / -20 DL2DBI -6 / - 2 Partial capture
08-17 18:12 20m - / - ON4IQ +6 / - 3 Partial capture
08-17 17:53 20m - / - YO4LUP -4 / - 2 Partial capture
08-17 15:41 20m - / - ON4IQ +6 / - 6 Partial capture
08-16 15:10 20m - / -25 SV6JHA -9 / - 2 ✓ Closing fragment
08-14 19:02 20m - / -14 GM4FDM -13 / - 2 Partial capture
08-11 19:41 20m - / -25 SM4MI -23 / - 2 Partial capture
08-11 15:57 20m - / - F5OHS -3 / - 3 Partial capture
08-11 15:26 20m - / - DL1RB -8 / - 3 Partial capture
08-08 17:28 20m - / - YO4GOU -6 / - 2 Partial capture
08-08 13:43 20m - / -16 R3RR -10 / - 2 ✓ Closing fragment
08-06 23:29 20m - / -19 EB1DJ -14 / - 2 ✓ Closing fragment
08-06 21:38 20m - / -19 UD6AWG -22 / - 2 ✓ Closing fragment
08-06 19:25 20m - / - ON7NQ -6 / - 2 Partial capture
08-06 19:21 20m - / -15 CR5VP -18 / - 3 Partial capture
08-05 16:22 20m - / -19 LZ1FBI -10 / - 2 Partial capture
08-04 17:16 20m - / - F4GGJ -14 / - 3 Partial capture
08-03 17:37 20m - / -23 OK1UOZ +5 / - 5 ✓ Closing fragment
08-03 12:38 20m - / -14 OE2LCM +15 / - 2 ✓ Closing fragment
08-02 16:30 20m - / -19 <...> -16 / - 2 Partial capture
08-01 21:09 20m - / - IV3DSG -6 / - 2 Partial capture
08-01 19:15 20m - / - PD4LYN/P -20 / - 4 Partial capture
08-01 17:48 20m - / -16 PD2WL -14 / - 2 ✓ Closing fragment
08-01 17:46 20m - / -21 GX0ERG +4 / - 2 ✓ Closing fragment
08-01 15:33 20m - / -14 R6ML -6 / - 2 ✓ Closing fragment
07-31 15:38 20m - / -21 RA6FSV -16 / - 5 ✓ Closing fragment
07-30 19:06 20m - / -23 DL5JW -16 / - 2 ✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

20m 
UTC    dB Audio  Message
100930 -16  819  JG5VFK R4FDK LO23 (x3)
134830 -18 1844  JG5VFK RC9A R MO04
200230  +9 2363  JG5VFK IK3SCB -16 (x2)
204730  -3 2518  JG5VFK F8AGD -15 (x2)
122100  -8  502  JG5VFK R2BP -08
155430  -1 1332  JG5VFK ON4AOI -19 (x2)
215130 -17 1850  JG5VFK F4AGZ 73
221430  -6 1639  JG5VFK F6FLU -15 (x3)

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