JA4VUQ — 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 JA4VUQ, decoded by SO8OO in southeastern Poland. 10 FT8 messages attributed to this token as transmitter, on 80m, across 3 UTC dates in the available aggregate history. Observed between 2026-10-28 and 2026-11-05.

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 10 FT8 messages attributed to JA4VUQ as the transmitting token by decoded message structure across 3 UTC dates in the available aggregate history. The largest monitored-band total was 80 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

80m · 10

First attributed message: 2026-10-28
Last attributed message: 2026-11-05 19:54 UTC

Observed FT8 message patterns

Attributed sample: 10 messages
Active dates: 3 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) 4, moderate (-15 to -9 dB) 6, strong (≥ -8 dB) 0.

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 JA4VUQ in decoded directed-looking exchanges:

4O4A · Montenegro IC8SQS · Italy PI4DX · Netherlands

Most frequent locator attributed to JA4VUQ

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 · 8 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 8,453 km (approx.)
Last such locator decoded: 2026-11-05 19:54 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	JA4VUQ S/N	Counterpart	Counterpart S/N	Msgs	Capture
11-05 19:55	80m	- / -	OM2WQ	+16 / -	2	Partial capture
11-05 19:52	80m	-20 / -	GI0VAB	- / -	2	Partial capture
11-05 19:51	80m	- / -	F4EWK	-3 / -	2	Partial capture
11-05 19:50	80m	- / -	OM2WQ	+13 / -	4	Partial capture
11-05 19:49	80m	-17 / -	GI0VAB	- / -	3	Partial capture
11-01 20:01	80m	- / -	IK5CHL	-12 / -	2	Partial capture
11-01 20:00	80m	- / -	RO2X	-14 / -	3	Partial capture
10-30 20:56	80m	- / 0	4O4A	+18 / -	2	✓ Closing fragment
10-29 21:48	80m	- / -11	IS0BOZ	-2 / -	2	Partial capture
10-29 19:30	80m	- / -	RO2X	+1 / -	4	Partial capture
10-29 19:27	80m	- / -14	UR3HC	-2 / -	2	Partial capture
10-29 19:27	80m	- / -	UR4LRG	+8 / -	3	Partial capture
10-28 20:32	80m	- / -	SP2HMT	+5 / -	3	Partial capture
10-28 20:32	80m	- / -	UA4FKT	-2 / -	3	Partial capture
10-28 20:29	80m	-12 / -3	IC8SQS	-2 / -4	5	✓ Full exchange observed
10-28 20:29	80m	- / -	RO2X	-13 / -	3	Partial capture
10-28 20:27	80m	-14 / -8	PI4DX	+1 / -	4	✓ Closing observed

Recent FT8 messages decoded at SO8OO

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

80m

UTC    dB Audio  Message
194930 -13 2309  GI0VAB JA4VUQ PM64
194945 -11  660  JA4VUQ F4LZZ JN09
195000 -19 2309  GI0VAB JA4VUQ PM64
195045 +18 2201  JA4VUQ OM2WQ JN88 (x2)
195115  -4 2663  JA4VUQ F4EWK JN26
195145  +9 2201  JA4VUQ OM2WQ JN88
195145  -2 2663  JA4VUQ F4EWK JN26
195215 +12 2202  JA4VUQ OM2WQ JN88
195230 -24 2308  GI0VAB JA4VUQ PM64
195345  +3  321  JA4VUQ F4LZZ JN09
195400 -15 2308  GI0VAB JA4VUQ PM64
195415  -8  716  JA4VUQ R2PM KO84
195515 +19 2201  JA4VUQ OM2WQ JN88 (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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