JH4SUY — 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: PM64

Receiver-side FT8 activity involving JH4SUY, decoded by SO8OO in southeastern Poland. 2 FT8 messages attributed to this token as transmitter, on 80m, across 2 UTC dates in the available aggregate history. Observed between 2026-10-12 and 2026-10-23.

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 JH4SUY as the transmitting token by decoded message structure across 2 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: 2026-10-12
Last attributed message: 2026-10-23 21:24 UTC

Observed FT8 message patterns

Attributed sample: 2 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 JH4SUY in decoded directed-looking exchanges:

SD5X · Sweden ×2 4O4A · Montenegro 5B4AMM · Cyprus 9A5E · Croatia D2UY · Angola DJ7M · Fed. Rep. of Germany E79D · Bosnia-Herzegovina EA6Y · Balearic Islands HA7XL · Hungary IT9IVN · Sicily SV9CVY · Crete YL3CW · Latvia

Most frequent locator attributed to JH4SUY

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: PM64 · 2 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 8,453 km (approx.)
Last such locator decoded: 2026-10-23 21:24 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	JH4SUY S/N	Counterpart	Counterpart S/N	Msgs	Capture
11-03 19:13	80m	- / -	UX5UO	0 / -	3	Partial capture
10-31 21:42	80m	- / -15	E79D	+23 / -	3	✓ Closing fragment
10-25 21:13	80m	- / -12	4O4A	+11 / -	3	✓ Closing fragment
10-25 19:24	80m	- / -	RO2X	+4 / -	5	Partial capture
10-24 20:43	80m	- / -	RO2X	-4 / -	4	Partial capture
10-24 20:42	80m	- / -17	HA7XL	+21 / -	2	✓ Closing fragment
10-23 21:30	80m	- / -21	4O4A	+8 / -	3	Partial capture
10-22 19:26	160m	- / -22	R4DI	-14 / -	2	Partial capture
10-22 19:22	160m	- / -22	R4DI	-10 / -	2	Partial capture
10-14 20:48	80m	- / -17	9A5E	-2 / -	2	✓ Closing fragment
10-04 19:50	80m	- / -14	DJ7M	+16 / -	2	✓ Closing fragment
09-29 21:20	80m	- / -14	5B4AMM	-11 / -	2	✓ Closing fragment
09-29 19:16	80m	- / -21	YL3OI	+14 / -	3	✓ Closing fragment
09-27 19:51	80m	- / -18	YL3CW	+8 / -	2	✓ Closing fragment
09-22 19:28	80m	- / -	UX1AA	-2 / -	3	Partial capture
09-22 19:26	80m	- / -27	SD5X	+1 / -	8	✓ Closing fragment
09-20 19:28	80m	- / -16	EA6Y	+12 / -	3	✓ Closing fragment
09-01 20:46	80m	- / -18	YO4DW	+10 / -	5	✓ Closing fragment
09-01 20:38	80m	- / -	SP5AA	+12 / -	4	Partial capture
08-28 20:40	80m	- / -16	IT9IVN	+2 / -	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
192445  +1 2267  JH4SUY RO2X KO74 (x5)
211300  +9 2733  JH4SUY 4O4A -12 (x3)
213200  -7 2188  JH4SUY 9K2GR -15
214200 +19 2803  JH4SUY E79D -15 (x3)
191345  +4 2422  JH4SUY UX5UO KO50 (x3)

160m

UTC    dB Audio  Message
192245  -9 1794  JH4SUY R4DI -22 (x4)

40m

UTC    dB Audio  Message
211400  -3 1990  JH4SUY <...> -19

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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