JH1XUM — reception at SO8OO

Signals decoded by SO8OO in southeastern Poland. FT8 and CW have separate histories; all times are UTC.

FT8 activity

DXCC entity inferred from callsign: Japan

Receiver-side FT8 activity involving JH1XUM, decoded by SO8OO in southeastern Poland. 3 FT8 messages attributed to this token as transmitter, on 10m, across 2 UTC dates in the available aggregate history. Observed between 2026-10-24 and 2026-11-07.

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 3 FT8 messages attributed to JH1XUM as the transmitting token by decoded message structure across 2 UTC dates in the available aggregate history. The available sample contains attributed decodes on 10 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

10m · 3

First attributed message: 2026-10-24
Last attributed message: 2026-11-07 06:51 UTC

Observed FT8 message patterns

Attributed sample: 3 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 JH1XUM in decoded directed-looking exchanges:

RJ6B · European Russia UA9FLJ · European Russia 5B4AMX · Cyprus CN8NS · Morocco DL3MIB · Fed. Rep. of Germany EA4HPY · Spain EX7CQ · Kyrgyzstan F6FKQ · France F8MRQ · France R2AVT · European Russia R6OP · European Russia RA3ZH · European Russia

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	JH1XUM S/N	Counterpart	Counterpart S/N	Msgs	Capture
11-07 07:17	10m	- / -	EB5IVB	-15 / -	3	Partial capture
11-06 22:23	40m	- / -16	R6OP	-12 / -	2	✓ Closing fragment
11-04 22:30	40m	- / -	EA5OM	-11 / -	3	Partial capture
11-04 22:20	40m	- / -16	DL3MIB	+6 / -	6	✓ Closing fragment
11-03 22:34	40m	- / -21	EA4HPY	0 / -	2	✓ Closing fragment
11-03 22:24	40m	- / -11	RD7KW	-4 / -	3	Partial capture
11-02 22:20	40m	- / -	G4CFS	+12 / -	14	Partial capture
10-30 22:17	40m	- / -	R2AL	-13 / -	4	Partial capture
10-29 22:28	40m	- / -16	EA6ABF	+6 / -	3	Partial capture
10-20 22:23	40m	- / -16	RZ4FWA	-6 / -	2	Partial capture
10-20 22:19	40m	- / -9	EX7CQ	+6 / -	2	✓ Closing fragment
10-19 22:22	40m	- / -	IW9HPG	-6 / -	2	Partial capture
10-13 22:14	40m	- / -13	UN0GY	-12 / -	2	✓ Closing fragment
10-13 18:51	40m	- / -	T77PM	-8 / -	2	Partial capture
10-13 18:50	40m	- / -	EA3AAY	-15 / -	2	Partial capture
10-13 18:49	40m	- / -	DJ0MAB	+10 / -	2	Partial capture
10-13 18:46	40m	- / -15	IU1WFE	-6 / -	3	Partial capture
10-13 18:45	40m	- / -8	F8MRQ	+4 / -	4	✓ Closing fragment
10-13 18:44	40m	- / -7	YL3AUL	-12 / -	3	✓ Closing fragment
10-12 18:54	40m	- / -18	R2AVT	-8 / -	2	✓ Closing fragment
10-12 18:51	40m	- / -14	RA3ZH	+2 / -	3	✓ Closing fragment
10-12 18:47	40m	- / -	R2AVT	-6 / -	7	Partial capture
09-25 15:03	40m	- / -	RD3FY	-12 / -	3	Partial capture
09-25 15:02	40m	- / -15	YO7CFD	-7 / -	3	✓ Closing fragment
09-19 21:12	40m	- / -	CN8NS	-10 / -	3	Partial capture
09-19 20:37	40m	- / -14	CN8NS	-8 / -	2	✓ Closing fragment
08-19 20:42	40m	- / -	RT6Z	0 / -	2	Partial capture

Recent FT8 messages decoded at SO8OO

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

10m

UTC    dB Audio  Message
101730  -7  470  JH1XUM <...> R+03
073415 -11  462  RJ6B JH1XUM 73
073515  -9  462  UA9FLJ JH1XUM RR73
065115  -9 2775  UW5ZM JH1XUM -15
071700 -22 2121  JH1XUM EB5IVB IM97 (x3)

40m

UTC    dB Audio  Message
222515  +0  436  JH1XUM RD7KW R-11
223445  -2 2354  JH1XUM EA4HPY -21 (x2)
222000  +6 1070  JH1XUM DL3MIB JN57 (x6)
222730 -17  587  JH1XUM RU6CH -15
223030  -9 2363  JH1XUM EA5OM IM99 (x3)
222300 -15 1038  JH1XUM R6OP -16 (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.

CW

No CW receptions recorded for this callsign in the last 30 days.

Explore CW reception at SO8OO

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