JN7FAH — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Japan Most frequent locator attributed to this token: QM08

Receiver-side FT8 activity involving JN7FAH, decoded by SO8OO in southeastern Poland. 11 FT8 messages attributed to this token as transmitter, on 80m, 40m, across 2 UTC dates in the available aggregate history. Observed between 2026-08-13 and 2026-09-15.

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 11 FT8 messages attributed to JN7FAH as the transmitting token by decoded message structure across 2 UTC dates in the available aggregate history. The largest monitored-band total was 80 m (73%), followed by 40 m (27%). In this small sample, the estimated median decoder S/N was -18 dB; no usual signal pattern is inferred.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-18 dB

Estimated median S/N

Bands

80m · 8 40m · 3

First attributed message: 2026-08-13
Last attributed message: 2026-09-15 20:29 UTC

Observed FT8 message patterns

Attributed sample: 11 messages
Active dates: 2 UTC dates
Estimated median S/N: -18 dB
S/N percentile sample: Too small
Recurring-pattern threshold: Not met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 11, moderate (-15 to -9 dB) 0, strong (≥ -8 dB) 0.

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 JN7FAH in decoded directed-looking exchanges:

OH5KNL · Finland LB1UK · Norway LX2A · Luxembourg OH1MLZ · Finland RD7O · European Russia SV2AEL · Greece

Most frequent locator attributed to JN7FAH

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: QM08 · 10 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 8,525 km (approx.)
Last such locator decoded: 2026-09-15 20:28 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	JN7FAH S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-15 20:29	80m	- / -23	LB1UK	-1 / -	6	✓ Closing fragment
09-15 20:27	80m	-19 / -15	LX2A	+2 / -14	6	✓ Full exchange observed
09-15 19:58	160m	- / -	SV2AEL	+10 / -	6	Partial capture
09-15 19:56	160m	- / -19	OH5KNL	+2 / -	2	✓ Closing fragment
09-15 19:25	40m	- / -	RX3DRC	-12 / -	2	Partial capture
09-15 19:13	40m	-18 / -	RI1FJZ	- / -	3	Partial capture
09-15 19:13	40m	- / -	IU8WQW	-14 / -	3	Partial capture
09-15 19:13	40m	- / -	UR3QKC	-3 / -	2	Partial capture
08-13 18:40	80m	- / -	RY7F	+4 / -	2	Partial capture
08-13 18:39	80m	- / -	RA3GZ	+6 / -	3	Partial capture
08-13 18:39	80m	-18 / -19	SV2AEL	+2 / -	5	✓ Closing observed
08-13 18:37	80m	- / -9	OH1MLZ	+14 / -	2	✓ Closing fragment
07-14 19:37	80m	- / -11	RD7O	+10 / -	4	✓ Closing fragment
07-14 19:36	80m	- / -16	DO2GGH	+11 / -	6	Partial capture
07-14 19:36	80m	- / -20	UA3PY	+10 / -	3	Partial capture
07-14 19:34	80m	- / -	RD7O	+8 / -	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
184115  +1  402  JN7FAH RY7F LN04
184145  +0 1901  JN7FAH SV2AEL RR73
202330 -16  345  LX2A JN7FAH QM08 (x4)
202845  +5 1976  JN7FAH LX2A -15
202900 -18 2355  LX2A JN7FAH R-14
202915  -2 1976  JN7FAH LX2A RR73
202915  -6 2746  JN7FAH LB1UK JP54 (x6)

160m

UTC    dB Audio  Message
195600  +4 2395  JN7FAH OH5KNL -19 (x2)
195800 +10  382  JN7FAH SV2AEL KN10 (x6)

40m

UTC    dB Audio  Message
191300  -2 1333  JN7FAH UR3QKC KN77
191300 -15 1384  JN7FAH IU8WQW JM78
191315 -17 1384  RI1FJZ JN7FAH QM08
191330  -4 1333  JN7FAH UR3QKC KN77
191330 -14 1384  JN7FAH IU8WQW JM78
191345 -17 1384  RI1FJZ JN7FAH QM08 (x2)
191530 -13 1384  JN7FAH IU8WQW JM78
192530 -13  979  JN7FAH RX3DRC KO85 (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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