JH1LON — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Japan Most frequent locator attributed to this token: PM95

Receiver-side FT8 activity involving JH1LON, decoded by SO8OO in southeastern Poland. 18 FT8 messages attributed to this token as transmitter, on 20m, across 5 UTC dates in the available aggregate history. Observed between 2026-06-06 and 2026-06-15.

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 18 FT8 messages attributed to JH1LON as the transmitting token by decoded message structure across 5 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 -13 dB; no usual signal pattern is inferred.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-13 dB

Estimated median S/N

Bands

20m · 18

First attributed message: 2026-06-06
Last attributed message: 2026-06-15 17:56 UTC

Observed FT8 message patterns

Attributed sample: 18 messages
Active dates: 5 UTC dates
Estimated median S/N: -13 dB
S/N percentile sample: Too small
Recurring-pattern threshold: Not met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 6, moderate (-15 to -9 dB) 11, strong (≥ -8 dB) 1.

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 JH1LON in decoded directed-looking exchanges:

DL2DBI · Fed. Rep. of Germany EA6NB · Balearic Islands F4IDT · France F8FUA · France F8RZ · France LA3BO · Norway LZ1FBI · Bulgaria OK2CNI · Czech Republic ON4IQ · Belgium ON5LW · Belgium R4FDW · European Russia SV2AEL · Greece

Most frequent locator attributed to JH1LON

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: PM95 · 10 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 8,693 km (approx.)
Last such locator decoded: 2026-06-15 17:56 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	JH1LON S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-15 18:49	40m	- / -9	PI4DX	+12 / -	2	✓ Closing fragment
08-24 17:47	20m	- / -12	UA3SNB	-11 / -	2	✓ Closing fragment
08-21 17:13	20m	- / -3	F8FUA	+5 / -	2	✓ Closing fragment
08-21 16:55	20m	- / -12	LA3BO	-10 / -	2	✓ Closing fragment
08-21 16:49	20m	- / -17	TK5AE	-4 / -	2	✓ Closing fragment
08-17 17:34	20m	- / -12	F4IDT	-10 / -	2	✓ Closing fragment
08-17 17:12	20m	- / -16	ON4IQ	+5 / -	3	✓ Closing fragment
08-17 16:55	20m	- / -4	SV2AEL	+2 / -	2	✓ Closing fragment
08-17 16:49	20m	- / -16	LZ1FBI	-5 / -	3	✓ Closing fragment
08-10 18:20	20m	- / -19	DL2DBI	-6 / -	4	✓ Closing fragment
08-10 17:56	20m	- / -	CT2HVF	0 / -	2	Partial capture
08-10 17:13	20m	- / -8	OK2CNI	-12 / -	2	✓ Closing fragment
07-27 17:42	20m	- / -6	R4FDW	-18 / -	4	✓ Closing fragment
07-26 16:57	20m	- / -19	9A2L	-7 / -	9	Partial capture
07-18 17:46	20m	- / -24	F8RZ	+9 / -	2	✓ Closing fragment
07-12 17:03	20m	- / -16	EA6NB	+5 / -	2	✓ Closing fragment
07-07 17:11	20m	- / -13	TN8GD	-16 / -	2	✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

80m

UTC    dB Audio  Message
154900 -14 2127  JH1LON YE4FNN RR73

40m

UTC    dB Audio  Message
181615  -9 2286  JH1LON UA4FKT LO23
184945 +13 1088  JH1LON PI4DX -09 (x2)

20m

UTC    dB Audio  Message
170730  -6 2757  JH1LON S59SV -14
171245  +4 2660  JH1LON ON4IQ JO20 (x3)
173430 -14 3088  JH1LON F4IDT -12 (x2)
164930  -1 1485  JH1LON TK5AE -17 (x2)
165500 -11 1983  JH1LON LA3BO -12 (x2)
171345  +4 1520  JH1LON F8FUA -03 (x2)
164000 -11 2001  JH1LON ON5LW RR73
174700 -13 1964  JH1LON UA3SNB -12 (x2)

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