JH0EXA — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Japan Most frequent locator attributed to this token: PM96

Receiver-side FT8 activity involving JH0EXA, decoded by SO8OO in southeastern Poland. 2 FT8 messages attributed to this token as transmitter, on 80m, across 1 UTC dates in the available aggregate history. Last observed 2026-08-12.

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 2 FT8 messages attributed to JH0EXA as the transmitting token by decoded message structure across 1 UTC dates in the available aggregate history. The available sample contains attributed decodes on 80 m (100%). The sample is too small to infer a recurring UTC-hour or received-S/N pattern.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

S/N pattern not inferred

Bands

80m · 2

First attributed message: 2026-08-12
Last attributed message: 2026-08-12 19:04 UTC

Observed FT8 message patterns

Attributed sample: 2 messages
Active dates: 1 UTC dates
S/N summary: Too few decodes
S/N percentile sample: Too small
Recurring-pattern threshold: Not met

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 JH0EXA in decoded directed-looking exchanges:

CT2IBL · Portugal 5B4AMM · Cyprus EW2GI · Belarus OK2BB · Czech Republic R6LPF · European Russia UA4FEN · European Russia EU3AA · Belarus LZ1GC · Bulgaria OH1MLZ · Finland SV8JE · Greece UA4FKT · European Russia YO4NT · Romania

Most frequent locator attributed to JH0EXA

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: PM96 · 2 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 8,603 km (approx.)
Last such locator decoded: 2026-08-12 19:04 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	JH0EXA S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-12 15:49	40m	- / -16	UA4FEN	-6 / -	2	✓ Closing fragment
09-04 16:48	80m	- / -	S51DI	-2 / -	3	Partial capture
08-28 19:06	40m	- / -	LZ2PC	+4 / -	2	Partial capture
08-28 19:06	40m	- / -12	R3XBS	-6 / -	2	Partial capture
08-27 11:19	10m	- / -11	CT2IBL	0 / -	2	✓ Closing fragment
08-15 17:33	40m	- / -7	5B4AMM	-4 / -	2	✓ Closing fragment
08-12 19:27	80m	- / -8	LZ1GC	+6 / -	2	✓ Closing fragment
08-12 19:15	80m	- / -16	OH1MLZ	+3 / -	6	✓ Closing fragment
08-12 19:12	80m	- / -16	EU3AA	+15 / -	2	✓ Closing fragment
08-12 19:05	80m	- / -	SP2FNC	-2 / -	2	Partial capture
08-12 19:03	80m	-18 / -	G6P	- / -	2	Partial capture
08-09 19:59	40m	- / -23	OK2BB	-3 / -	4	✓ Closing fragment
08-09 19:42	80m	- / -14	UA4FKT	+11 / -	4	✓ Closing fragment
08-09 19:41	80m	- / -14	YO4NT	+20 / -	4	✓ Closing fragment
08-07 20:07	80m	- / -16	SV8JE	-8 / -	2	✓ Closing fragment
07-18 20:23	40m	- / -21	R6LPF	-6 / -	4	✓ Closing fragment
07-11 19:32	40m	- / -15	DL6NDN	-8 / -	3	Partial capture

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
202330  -5 2665  JH0EXA R6LPF KN97 (x3)
195915  +2 1264  JH0EXA OK2BB -23 (x4)
173330  -3 2500  JH0EXA 5B4AMM -07 (x2)
190630  -5 1214  JH0EXA R3XBS -12
190630  +4  469  JH0EXA LZ2PC KN22
190700  -8 1214  JH0EXA R3XBS -12
190700  +3  469  JH0EXA LZ2PC KN22
154900  -6 1174  JH0EXA UA4FEN -16 (x2)

80m

UTC    dB Audio  Message
190500  -1 1137  JH0EXA SP2FNC JO94 (x2)
191230 +22 1851  JH0EXA EU3AA -16 (x2)
191530  +4 2246  JH0EXA OH1MLZ -16 (x6)
192700  +2 1479  JH0EXA LZ1GC -08 (x2)
164815  +1 2057  JH0EXA S51DI JN76 (x3)

10m

UTC    dB Audio  Message
111945  +0 2125  JH0EXA CT2IBL -11 (x2)

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