JA6FIO — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Japan Most frequent locator attributed to this token: PM53

Receiver-side FT8 activity involving JA6FIO, decoded by SO8OO in southeastern Poland. 50 FT8 messages attributed to this token as transmitter, on 20m, across 6 UTC dates in the available aggregate history. Observed between 2026-06-13 and 2026-07-20.

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 50 FT8 messages attributed to JA6FIO as the transmitting token by decoded message structure across 6 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 strong S/N range (72%); the estimated median was -6 dB.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-6 dB

Estimated median S/N

Bands

20m · 50

First attributed message: 2026-06-13
Last attributed message: 2026-07-20 20:50 UTC

Observed FT8 message patterns

Attributed sample: 50 messages
Active dates: 6 UTC dates
Estimated median S/N: -6 dB
Estimated 10th-90th percentile: -13 to -1 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 3, moderate (-15 to -9 dB) 11, strong (≥ -8 dB) 36.

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 JA6FIO in decoded directed-looking exchanges:

9K2YM · Kuwait A92AE · Bahrain CS2WWA · Portugal D44AG · Cape Verde II5WWA · Italy TK5K · Corsica TM8WWA · France US5HL · Ukraine

Most frequent locator attributed to JA6FIO

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: PM53
SO8OO receiver locator: KN09VW
Locator-centre separation: 8,425 km (approx.)
Last such locator decoded: 2026-06-17 20:26 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 UTC	Band	JA6FIO S/N	Counterpart	Counterpart S/N	Msgs	Capture
08-23 21:05	20m	- / -13	US5HL	0 / -	3	✓ Closing fragment
08-21 21:47	20m	- / -	DB9LG	+5 / -	2	Partial capture
08-07 20:26	20m	- / -15	F4MHR	-11 / -	2	Partial capture
08-07 20:24	20m	- / -14	DL1YS	-8 / -	2	Partial capture
07-27 19:02	20m	- / -	2E0FUM	-11 / -	2	Partial capture
07-21 10:51	20m	- / -18	TK5K	+2 / -	2	✓ Closing fragment
07-20 20:49	20m	- / -16	PD0DDA	-3 / -	7	Partial capture
07-20 20:48	20m	-16 / -	D44AG	- / -7	2	✓ Closing fragment
07-04 20:40	20m	- / -20	II5WWA	+1 / -	2	✓ Closing fragment
07-04 20:28	40m	- / -19	4L/SP1MVG	-20 / -	2	Partial capture
07-03 20:58	20m	- / -21	CS2WWA	-5 / -	2	✓ Closing fragment
07-03 19:54	40m	- / -18	SN4WWA	-12 / -	2	Partial capture
07-03 19:24	20m	- / -17	II2WWA	-7 / -	3	Partial capture
07-02 18:30	20m	- / -11	HB9TIH	-18 / -	2	Partial capture
07-02 18:26	20m	-20 / -24	II1WWA	+2 / -11	4	Partial capture
07-02 18:22	20m	-13 / -8	TM8WWA	+8 / -7	3	✓ Full exchange observed

Recent FT8 messages decoded at SO8OO

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

20m

UTC    dB Audio  Message
105200  +1  425  JA6FIO TK5K 73
190215 -11 1019  JA6FIO 2E0FUM IO92 (x2)
211730  -2 1026  JA6FIO 9K2YM 73
202400  -9  652  JA6FIO DL1YS R-14 (x2)
202600  -9 1230  JA6FIO F4MHR R-15 (x2)
202730  -3 2974  JA6FIO OZ1LDO JO45
214745  +3  432  JA6FIO DB9LG JO40 (x2)
210300  -6 2867  JA6FIO A92AE RR73
210500  -2 2918  JA6FIO US5HL -13 (x3)

10m

UTC    dB Audio  Message
054215 -21 1483  JA6FIO RD3AD KO85

40m

UTC    dB Audio  Message
195400  -9 2070  JA6FIO SN4WWA R-18 (x2)
202800 -19 1531  JA6FIO 4L/SP1MVG R-19 (x2)

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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