JA3XNH — 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 Most frequent locator attributed to this token: PM84

Receiver-side FT8 activity involving JA3XNH, decoded by SO8OO in southeastern Poland. 8 FT8 messages attributed to this token as transmitter, on 20m, across 4 UTC dates in the available aggregate history. Observed between 2026-06-06 and 2026-06-19.

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 8 FT8 messages attributed to JA3XNH 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 (100%). In this small sample, the estimated median decoder S/N was -15 dB; no usual signal pattern is inferred.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-15 dB

Estimated median S/N

Bands

20m · 8

First attributed message: 2026-06-06
Last attributed message: 2026-06-19 18:41 UTC

Observed FT8 message patterns

Attributed sample: 8 messages
Active dates: 4 UTC dates
Estimated median S/N: -15 dB
S/N percentile sample: Too small
Recurring-pattern threshold: Not met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 3, moderate (-15 to -9 dB) 2, strong (≥ -8 dB) 3.

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 JA3XNH in decoded directed-looking exchanges:

F6EKI · France I8MYM · Italy OK2CNI · Czech Republic R4FDW · European Russia YO6LM · Romania 8Z1IT · Saudi Arabia OE3HPT · Austria DJ7M · Fed. Rep. of Germany IT9VCE · Sicily OK1YQ · Czech Republic R50RKZ · European Russia RZ3DJ · European Russia

Most frequent locator attributed to JA3XNH

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: PM84 · 6 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 8,675 km (approx.)
Last such locator decoded: 2026-06-19 18:41 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	JA3XNH S/N	Counterpart	Counterpart S/N	Msgs	Capture
10-16 18:52	80m	- / -16	RZ3DJ	0 / -	3	✓ Closing fragment
10-12 21:17	40m	- / -24	OE3HPT	+12 / -	5	✓ Closing fragment
09-29 19:31	80m	- / -	UX1AA	-17 / -	2	Partial capture
09-29 19:26	80m	- / -9	F5OHS	+10 / -	3	Partial capture
09-29 19:22	80m	- / -24	IT9VCE	0 / -	2	✓ Closing fragment
09-29 19:11	80m	- / -17	YL3OI	+13 / -	4	✓ Closing fragment
09-26 21:05	40m	- / -	9A5CW	-6 / -	2	Partial capture
09-24 18:17	40m	- / -	HB9ELE	+9 / -	5	Partial capture
09-19 21:07	40m	- / -	EB5AL	-1 / -	3	Partial capture
09-13 19:01	40m	- / -	LB7ZG	+4 / -	2	Partial capture
09-10 17:30	80m	- / -13	OK1YQ	+18 / -	2	✓ Closing fragment
09-09 17:44	80m	- / -13	DJ7M	+4 / -	4	✓ Closing fragment
08-28 19:12	40m	- / -	R7ZY	+3 / -	4	Partial capture
08-28 19:07	40m	- / -	OK7PJ	+4 / -	2	Partial capture
08-14 19:28	80m	- / -9	R50RKZ	+17 / -	2	✓ Closing fragment
07-30 19:26	20m	- / -	PD1ROS	+4 / -	2	Partial capture
07-30 19:26	20m	- / +3	R4FDW	-18 / -	3	✓ Closing fragment
07-30 19:20	20m	- / -9	CT2FXY	-7 / -	4	Partial capture
07-30 19:15	20m	- / +7	F6EKI	+5 / -	4	✓ Closing fragment
07-29 17:49	20m	- / -24	I8MYM	-2 / -	2	✓ Closing fragment
07-25 08:12	10m	- / -	PI4DX	-4 / -	4	Partial capture

Recent FT8 messages decoded at SO8OO

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

80m

UTC    dB Audio  Message
173030 +17 1489  JA3XNH OK1YQ RR73
191145  +9 2649  JA3XNH YL3OI KO26 (x4)
192215  +0 2709  JA3XNH IT9VCE R-24 (x2)
192645  +7 2544  JA3XNH F5OHS JN19 (x3)
193115 -20 2254  JA3XNH UX1AA KO70 (x2)
185245  +0  403  JA3XNH RZ3DJ KO85 (x3)

40m

UTC    dB Audio  Message
210830  -2 2335  JA3XNH EB5AL IM99
212330  -8 1181  JA3XNH IU4PPL JN54
181700  +9  642  JA3XNH HB9ELE JN47 (x5)
210500  -7  545  JA3XNH 9A5CW JN65 (x3)
211715 +13 2865  JA3XNH OE3HPT JN77 (x5)

20m

UTC    dB Audio  Message
191600  +7 1801  JA3XNH F6EKI R+07 (x2)
191830 -24 1659  JA3XNH RA6OF KN87
192000  -8  605  JA3XNH CT2FXY IM59 (x4)
192600 -15 1682  JA3XNH R4FDW +03
192600  +7 2941  JA3XNH PD1ROS JO22
192630 -19 1682  JA3XNH R4FDW +03
192630  +1 2941  JA3XNH PD1ROS JO22
192700 -21 1682  JA3XNH R4FDW RR73
214245  -8  483  JA3XNH SV9/PD9VOG -12
210700  -1 2493  JA3XNH OK2CNI RR73
210830 -12 2338  JA3XNH YO6LM RR73

10m

UTC    dB Audio  Message
081215  -3  985  JA3XNH PI4DX JO21 (x4)

CW

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

Explore CW reception at SO8OO

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