JF3KON — FT8 activity observed at SO8OO

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

Receiver-side FT8 activity involving JF3KON, decoded by SO8OO in southeastern Poland. 41 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, across 4 UTC dates in the available aggregate history. Observed between 2026-06-06 and 2026-09-01.

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 41 FT8 messages attributed to JF3KON as the transmitting token by decoded message structure across 4 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (63%), followed by 80 m (22%) and 40 m (15%). 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 strong S/N range (63%); the estimated median was -7 dB.

Overview

41
Messages attributed
4
UTC dates decoded
7
Active 15-min windows
-7 dB
Estimated median S/N

Bands

80m · 9 40m · 6 20m · 26
First attributed message: 2026-06-06
Last attributed message: 2026-09-01 19:32 UTC

Observed FT8 message patterns

Attributed sample
41 messages
Active dates
4 UTC dates
Estimated median S/N
-7 dB
Estimated 10th-90th percentile
-14 to +3 dB
Recurring-pattern threshold
Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 0, moderate (-15 to -9 dB) 15, strong (≥ -8 dB) 26.

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 JF3KON in decoded directed-looking exchanges:

Most frequent locator attributed to JF3KON

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 · 31 decoded messages
SO8OO receiver locator
KN09VW
Locator-centre separation
8,565 km (approx.)
Last such locator decoded
2026-09-01 19:32 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 UTCBandJF3KON S/NCounterpartCounterpart S/NMsgsCapture
09-15 20:26 80m - / - LA5FJA -1 / - 2 Partial capture
09-12 19:47 40m - / - YO3EGE +6 / - 2 Partial capture
09-01 19:33 40m - / -10 DF8IU +8 / - 2 Partial capture
09-01 19:29 40m -14 / - CN8NS - / - 4 Partial capture
09-01 19:21 40m - / -10 DF8IU +12 / - 3 Partial capture
09-01 19:19 40m -12 / - CN8NS - / - 2 Partial capture
09-01 19:17 40m - / - R7ZY +9 / - 4 Partial capture
09-01 19:10 40m - / - LB7ZG +8 / - 2 Partial capture
08-12 20:02 80m - / - RO2X -8 / - 4 Partial capture
08-12 19:57 80m - / - HA7XL +21 / - 3 Partial capture
08-12 19:57 80m - / - SV8TCK -9 / - 3 Partial capture
08-12 19:55 80m - / - RO2X -7 / - 6 Partial capture
08-12 19:54 80m - / - E74MG +2 / - 3 Partial capture
08-12 19:53 80m -10 / +9 LZ1GC +4 / -7 4 ✓ Full exchange observed
08-12 19:53 80m -9 / -13 SV6JHA +3 / - 5 ✓ Closing observed
08-12 19:53 80m - / - UD6F -7 / - 6 Partial capture
08-12 19:52 80m - / - SP9UPH +15 / - 2 Partial capture
08-12 19:51 80m -13 / -10 RY7F -14 / - 6 ✓ Closing observed
08-12 19:51 80m - / - SP5AEY +5 / - 3 Partial capture
08-12 19:50 80m -15 / -20 SP2HNF +13 / -19 7 ✓ Full exchange observed
08-12 19:49 80m -11 / -12 LA9GX +10 / -15 5 ✓ Full exchange observed
07-22 20:18 40m - / - R6FX -10 / - 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
195700  -3 2436  JF3KON RO2X KO74
195700 +22  417  JF3KON HA7XL JN97
195730  -9  319  JF3KON SV8TCK KM18
195730 -10 2435  JF3KON RO2X KO74
195730 +20  417  JF3KON HA7XL JN97
195800 -12  320  JF3KON SV8TCK KM18
195800  -9 2436  JF3KON RO2X KO74
195800 +21  417  JF3KON HA7XL JN97
195830  -8  416  JF3KON R3PLA KO84
200230  -9 2281  JF3KON RO2X KO74 (x4)
202615  -1 2584  JF3KON LA5FJA JP41 (x2)
40m 
UTC    dB Audio  Message
191830 +10 2589  JF3KON R7ZY KN98
191945 -14 2727  CN8NS JF3KON PM74 (x2)
192100 +10 2474  JF3KON DF8IU -10 (x3)
192945 -14 2370  CN8NS JF3KON PM74 (x4)
193330  +4 2140  JF3KON DF8IU -10 (x2)
193000  +8  738  JF3KON UA6FM -15
194700  +7  521  JF3KON YO3EGE KN34 (x2)
20m 
UTC    dB Audio  Message
195830 -17 1943  JF3KON CT2GFJ IM67

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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