JA2VMU — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Japan

Receiver-side FT8 activity involving JA2VMU, decoded by SO8OO in southeastern Poland. 4 FT8 messages attributed to this token as transmitter, on 40m, across 2 UTC dates in the available aggregate history. Observed between 2026-09-19 and 2026-09-20.

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 4 FT8 messages attributed to JA2VMU as the transmitting token by decoded message structure across 2 UTC dates in the available aggregate history. The available sample contains attributed decodes on 40 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

40m · 4

First attributed message: 2026-09-19
Last attributed message: 2026-09-20 19:11 UTC

Observed FT8 message patterns

Attributed sample: 4 messages
Active dates: 2 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 JA2VMU in decoded directed-looking exchanges:

CT2IBL · Portugal ON4IQ · Belgium F4HDR · France IK2WSA · Italy PD0IFI · Netherlands CN8NS · Morocco EA7ALL · Spain IZ0ZIP · Italy LZ2II · Bulgaria R6FX · European Russia UT9NA · Ukraine YO4GIY · Romania

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	JA2VMU S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-20 19:19	40m	- / -	US2YW	+10 / -	2	Partial capture
09-20 19:17	40m	- / +3	F8MRQ	+6 / -	3	Partial capture
09-20 19:16	40m	- / -12	LZ2II	+8 / -	2	✓ Closing fragment
09-20 19:09	40m	- / -15	YO4GIY	-6 / -	3	✓ Closing fragment
09-20 19:02	40m	- / -	R6FX	+2 / -	2	✓ Closing fragment
09-20 19:01	40m	- / -	Z34K	+10 / -	2	Partial capture
09-20 19:00	40m	- / -13	UT9NA	+10 / -	5	✓ Closing fragment
09-20 18:59	40m	- / -15	IZ0ZIP	+2 / -	2	✓ Closing fragment
09-19 20:52	40m	- / -14	DK7ZT	0 / -	3	Partial capture
09-19 20:50	40m	-11 / -6	UR1CCT	-15 / -	2	Partial capture
09-19 20:49	40m	-9 / -18	CN8NS	0 / -	3	✓ Closing observed
09-03 16:49	80m	- / -12	RO2X	-4 / -	3	✓ Closing fragment
09-03 16:49	80m	- / -22	RQ7O	+6 / -	5	✓ Closing fragment
09-03 16:48	80m	- / -15	UR4LBG	-7 / -	5	✓ Closing fragment
09-03 16:46	80m	- / -17	R2WAF	-3 / -	3	✓ Closing fragment
09-03 16:45	80m	- / -15	YO4NT	+7 / -	2	✓ Closing fragment
09-03 16:35	80m	- / -22	VU2CPL	-11 / -	3	Partial capture
09-03 16:33	80m	- / -	R2WAF	-6 / -	2	Partial capture
09-03 16:31	80m	- / -17	RY4C	-6 / -	3	✓ Closing fragment
09-03 16:16	80m	- / -19	RY3D	+6 / -	3	✓ Closing fragment
09-03 16:14	80m	- / -14	LY7M	+8 / -	2	✓ Closing fragment
08-31 14:18	20m	- / -13	F4HDR	+14 / -	2	✓ Closing fragment
08-27 11:25	10m	- / -20	ON4IQ	+10 / -	2	✓ Closing fragment
08-27 11:22	10m	- / -11	CT2IBL	+4 / -	2	✓ Closing fragment
07-09 12:27	20m	- / -9	IK2WSA	+6 / -	3	✓ Closing fragment
07-09 11:42	20m	- / -19	PD0IFI	-5 / -	7	✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
190130 +10 2187  JA2VMU UT9NA R-13 (x2)
190230  +2 2609  JA2VMU R6FX LN14 (x2)
190930  -9 1141  JA2VMU YO4GIY -15 (x3)
191145 -12 2608  EA7ALL JA2VMU RR73
191630  +7  742  JA2VMU LZ2II -12 (x2)
191730  +7 2608  JA2VMU F8MRQ JN17 (x3)
191930  +9 2609  JA2VMU US2YW KN28 (x2)

80m

UTC    dB Audio  Message
164700  -2 1804  JA2VMU R2WAF R-17 (x2)
164800  -6 2070  JA2VMU UR4LBG KN89 (x4)
164930  +6 2208  JA2VMU RQ7O KN98
164930  -5 2404  JA2VMU RO2X KO74
165000  -5 2070  JA2VMU UR4LBG 73
165000  -5 2404  JA2VMU RO2X R-12
165030  +9 2208  JA2VMU RQ7O KN98
165030  -1 2404  JA2VMU RO2X 73
165100  +9 2207  JA2VMU RQ7O KN98 (x3)

20m

UTC    dB Audio  Message
114200 -10  754  JA2VMU PD0IFI JO32 (x7)
114830 -12  494  JA2VMU M7VME IO83
122745  +7  494  JA2VMU IK2WSA JN45 (x3)
141830 +17 2967  JA2VMU F4HDR -13 (x2)

10m

UTC    dB Audio  Message
112015 -16 1595  JA2VMU CT7AXN -14
112245  +4 2126  JA2VMU CT2IBL -11 (x2)
112500  +8 2509  JA2VMU ON4IQ -20 (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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