JH0AHI — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Japan Most frequent locator attributed to this token: PM97

Receiver-side FT8 activity involving JH0AHI, decoded by SO8OO in southeastern Poland. 91 FT8 messages attributed to this token as transmitter, on 40m, 20m, across 4 UTC dates in the available aggregate history. Observed between 2026-06-06 and 2026-09-04.

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 91 FT8 messages attributed to JH0AHI 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 (81%), followed by 40 m (19%). 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 (75%); the estimated median was -5 dB.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-5 dB

Estimated median S/N

Bands

40m · 17 20m · 74

First attributed message: 2026-06-06
Last attributed message: 2026-09-04 20:32 UTC

Observed FT8 message patterns

Attributed sample: 91 messages
Active dates: 4 UTC dates
Estimated median S/N: -5 dB
Estimated 10th-90th percentile: -11 to 0 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 0, moderate (-15 to -9 dB) 23, strong (≥ -8 dB) 68.

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 JH0AHI in decoded directed-looking exchanges:

CT1FIU · Portugal E77FN · Bosnia-Herzegovina F1ODM · France F4IBJ · France GM3JIM · Scotland IH9YMC · African Italy IQ4JO · Italy IZ5WTV · Italy M3WHB · England M7JVT · England PT7ZT · Brazil RA6OY · European Russia

Most frequent locator attributed to JH0AHI

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: PM97 · 51 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 8,513 km (approx.)
Last such locator decoded: 2026-09-04 20:31 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	JH0AHI S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-19 21:14	40m	- / -11	EX7CQ	0 / -	2	✓ Closing fragment
09-19 19:37	80m	- / -18	TA3GO	-7 / -	2	Partial capture
09-11 19:05	40m	- / -14	IK6GPZ	+2 / -	2	✓ Closing fragment
09-11 19:01	40m	- / -	DJ7BU	+2 / -	2	Partial capture
09-11 18:59	40m	- / -13	ON4AOI	+16 / -	2	✓ Closing fragment
09-11 18:59	40m	- / -19	R1QF	-9 / -	3	Partial capture
09-11 18:56	40m	- / -12	EW4DX	-13 / -	3	Partial capture
09-11 18:56	40m	- / -	LX1JH	+12 / -	2	Partial capture
09-04 20:29	40m	-9 / -	CN8NS	- / -18	5	Partial capture
09-04 20:17	40m	-12 / -	CN8NS	- / -	2	Partial capture
09-04 20:07	40m	-11 / -16	DL6RS	+2 / -18	5	✓ Full exchange observed
09-04 20:05	40m	-13 / -11	UR7FM	+12 / -10	5	✓ Full exchange observed
09-04 20:02	40m	- / -7	SP4NDY	-12 / -	2	✓ Closing fragment
09-04 20:02	40m	-14 / -12	IU2FRL	+2 / -17	5	Partial capture
09-04 20:00	40m	- / -10	YL3HI	+4 / -	2	✓ Closing fragment
08-29 20:04	40m	- / -11	R7ZY	+12 / -	4	✓ Closing fragment
08-29 19:40	40m	- / -12	9A4V	+16 / -	2	✓ Closing fragment
08-14 19:43	40m	- / -11	SQ2HDO	+4 / -	2	✓ Closing fragment
08-08 20:09	40m	- / -	DJ6GI	-2 / -	3	Partial capture
08-08 20:06	40m	- / -16	UB6OCP	-20 / -	3	✓ Closing fragment
08-08 19:51	40m	- / -	9A7BB	-21 / -	6	Partial capture
08-08 19:50	40m	- / -12	R2EA	-10 / -	2	Partial capture
08-08 19:45	20m	- / -17	IH9YMC	-2 / -	2	✓ Closing fragment
08-08 19:09	40m	- / -13	OM5ALL	+1 / -	4	Partial capture
08-08 18:58	40m	- / -	OM5ALL	-8 / -	3	Partial capture
08-08 18:54	40m	- / -14	YO6LRV	-8 / -	5	✓ Closing fragment
07-31 21:09	20m	- / -12	CR7BUJ	-13 / -	2	Partial capture
07-31 21:03	20m	- / -18	F4IBJ	-8 / -	3	✓ Closing fragment
07-31 20:46	20m	- / -16	CT1FIU	-13 / -	2	✓ Closing fragment
07-31 20:44	20m	- / +5	IZ5WTV	+16 / -	4	✓ Closing fragment
07-31 20:42	20m	- / -	IU0VOG	-11 / -	2	Partial capture
07-31 20:40	20m	- / -1	GM3JIM	-18 / -	3	✓ Closing fragment
07-31 20:35	20m	- / -	EA1NT	-16 / -	2	Partial capture
07-31 19:56	40m	- / -12	IS0LAY	-21 / -	3	✓ Closing fragment
07-31 19:53	40m	- / -22	UA4AOC	-5 / -	3	✓ Closing fragment
07-31 19:49	40m	- / -	R4PFY	-18 / -	2	✓ Closing fragment
07-31 19:47	40m	- / -	R2AL	+2 / -	2	Partial capture
07-26 21:29	20m	- / -	PT7ZT	-18 / -	2	✓ Closing fragment
07-26 21:27	20m	- / -	G8IXM	-13 / -	3	Partial capture
07-26 21:25	20m	- / -15	RA6OY	-3 / -	6	✓ Closing fragment
07-26 21:22	20m	- / -14	E77FN	-5 / -	3	✓ Closing fragment
07-26 21:15	20m	- / -16	M3WHB	-8 / -	2	✓ Closing fragment
07-26 20:00	40m	- / -	R2AL	+2 / -	4	Partial capture
07-25 19:55	20m	- / -	CR7BRV	-2 / -	3	Partial capture
07-25 19:52	20m	- / +3	TK4VXL	-8 / -	4	Partial capture
07-25 19:46	20m	-5 / -	ON6FDP/P	+4 / -	2	Partial capture
07-12 18:49	40m	- / -	OR0A	-13 / -	6	Partial capture
07-12 18:49	40m	- / -5	IT9SVJ	-20 / -	2	Partial capture
07-12 18:48	40m	- / -	SP3IPA	-9 / -	3	Partial capture
07-12 18:45	40m	- / -7	YO9AYN	+6 / -	3	✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
185645 -12  642  JH0AHI EW4DX -12
185715 +16  482  JH0AHI LX1JH JN39
185715 -14  642  JH0AHI EW4DX -12 (x2)
185915 -10 2525  JH0AHI R1QF -19
185915 +15  717  JH0AHI ON4AOI -13
185945 -10 2524  JH0AHI R1QF -19
185945 +16  717  JH0AHI ON4AOI RR73
190015  -8 2525  JH0AHI R1QF -19
190115  +2  293  JH0AHI DJ7BU JN59 (x2)
190530  +1 1568  JH0AHI IK6GPZ -14 (x2)
211400  +0 1714  JH0AHI EX7CQ -11 (x2)

80m

UTC    dB Audio  Message
193730  -6  740  JH0AHI TA3GO R-18 (x2)

10m

UTC    dB Audio  Message
105330 -13 1483  JH0AHI ON6AA JO11
111500 -20 1896  JH0AHI EA3EQS JN01

20m

UTC    dB Audio  Message
204300 -15 1334  JH0AHI CT1FIU IN50
204400 +16  990  JH0AHI IZ5WTV JN53 (x4)
204600 -13 1333  JH0AHI CT1FIU R-16 (x2)
210345 -11 1629  JH0AHI F4IBJ IN96 (x3)
210615  -4  568  JH0AHI F4BJN JN25
210945 -13 1257  JH0AHI CR7BUJ R-12 (x2)
194500  -3  633  JH0AHI IH9YMC R-17 (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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