JA7QVK — 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: QM08

Receiver-side FT8 activity involving JA7QVK, decoded by SO8OO in southeastern Poland. 18 FT8 messages attributed to this token as transmitter, on 80m, across 6 UTC dates in the available aggregate history. Observed between 2026-09-28 and 2026-11-04.

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 JA7QVK as the transmitting token by decoded message structure across 6 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 -17 dB; no usual signal pattern is inferred.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-17 dB

Estimated median S/N

Bands

80m · 18

First attributed message: 2026-09-28
Last attributed message: 2026-11-04 21:21 UTC

Observed FT8 message patterns

Attributed sample: 18 messages
Active dates: 6 UTC dates
Estimated median S/N: -17 dB
S/N percentile sample: Too small
Recurring-pattern threshold: Not met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 12, moderate (-15 to -9 dB) 5, 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 JA7QVK in decoded directed-looking exchanges:

4J3DJ · Azerbaijan DL1RWN · Fed. Rep. of Germany F5BZB · France LA9GX · Norway LZ2IP · Bulgaria OH0Z · Aland Islands OH8SR · Finland RN1CW · European Russia SM2LIY · Sweden 5B4AMM · Cyprus F1DJY · France 4O4A · Montenegro

Attributed messages by UTC hour

Rolling 90-day UTC chart window. Counts follow decoded message structure: the first token for CQ, or the second token in a directed-looking message.

Most frequent locator attributed to JA7QVK

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: QM08 · 4 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 8,525 km (approx.)
Last such locator decoded: 2026-10-24 21:11 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	JA7QVK S/N	Counterpart	Counterpart S/N	Msgs	Capture
11-04 21:13	160m	- / -15	S58T	+12 / -	2	Partial capture
11-04 21:12	160m	- / -	SV8JE	+2 / -	2	Partial capture
11-03 21:18	80m	- / -20	UX5UO	0 / -	3	✓ Closing fragment
11-02 21:15	40m	- / -20	SV5BYP	-1 / -	4	Partial capture
11-01 20:18	160m	- / -18	LA9GX	-4 / -	2	✓ Closing fragment
10-31 21:20	80m	- / -20	IS0JHQ	+6 / -	3	Partial capture
10-29 21:31	160m	- / -20	F5BZB	+3 / -	2	✓ Closing fragment
10-29 21:26	160m	- / -6	SM2LIY	-11 / -	2	✓ Closing fragment
10-29 21:18	160m	- / -11	OH8SR	-6 / -	2	✓ Closing fragment
10-29 21:14	160m	- / -	OH5KNL	-3 / -	3	Partial capture
10-29 20:46	80m	- / -15	MM0EAX	-2 / -	2	✓ Closing fragment
10-29 20:41	80m	- / -16	IV3DXW	+16 / -	3	✓ Closing fragment
10-29 20:39	80m	- / -14	OT7K	+17 / -	2	✓ Closing fragment
10-29 20:39	80m	- / -	DK3WW	+10 / -	3	Partial capture
10-24 21:10	80m	-16 / -	OD5ZZ	- / -	3	Partial capture
10-23 20:42	80m	- / -12	4O4A	+14 / -	2	✓ Closing fragment
10-23 20:22	160m	- / -10	4J3DJ	-9 / -	2	✓ Closing fragment
10-21 21:05	40m	- / -	IC8TEM	-7 / -	2	Partial capture
10-19 21:07	40m	- / -13	F1DJY	+8 / -	2	✓ Closing fragment
10-15 19:26	160m	- / -	RJ6B	-13 / -	4	Partial capture
10-13 20:59	80m	- / -17	EW6BZ	+16 / -	2	✓ Closing fragment
10-13 20:30	80m	- / -	R4FJ	-10 / -	3	Partial capture
10-13 20:26	80m	-18 / -22	ES2AJ	+18 / -7	4	✓ Full exchange observed
10-05 19:57	160m	- / -15	LZ2IP	+12 / -	3	✓ Closing fragment
10-02 20:33	80m	- / -24	UA4FKT	+7 / -	4	✓ Closing fragment
10-01 20:10	80m	- / -	OH6JD	-4 / -	2	Partial capture
09-29 20:37	80m	-22 / -22	HA7XL	+24 / -13	4	✓ Full exchange observed
09-29 20:37	80m	- / -	UX5UO	+16 / -	3	Partial capture
09-29 20:36	80m	- / -9	YO4NF	+10 / -	2	✓ Closing fragment
09-29 20:19	80m	-19 / -15	F5UKW	+7 / -9	5	✓ Full exchange observed
09-28 20:39	80m	-7 / -	7Z1DH	- / -15	2	Partial capture
09-28 20:33	80m	-14 / -	7Z1DH	- / -13	2	Partial capture
09-28 19:36	80m	- / -	R7HL	-3 / -	2	Partial capture
09-22 21:09	40m	- / -	IC8TEM	-1 / -	4	Partial capture
09-18 19:45	160m	- / -17	DL1RWN	+4 / -	3	✓ Closing fragment
09-18 19:44	160m	- / -24	RN1CW	-15 / -	3	✓ Closing fragment
09-13 20:15	80m	- / -	SP8ONV	-1 / -	4	✓ Closing fragment
09-13 20:14	80m	- / -3	S51DI	0 / -	2	✓ Closing fragment
09-13 20:10	80m	- / -16	UX1AA	-7 / -	6	✓ Closing fragment
09-13 20:10	80m	- / -16	S59A	+20 / -	2	✓ Closing fragment
09-13 19:56	80m	- / -	UX1AA	-2 / -	5	Partial capture

Recent FT8 messages decoded at SO8OO

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

80m

UTC    dB Audio  Message
203945 +10 1848  JA7QVK DK3WW JO62
204015 +20  605  JA7QVK OT7K RR73
204015 +11 1848  JA7QVK DK3WW JO62
204115 +14 2841  JA7QVK IV3DXW JN65 (x3)
204615  +0  868  JA7QVK MM0EAX R-15 (x2)
212030  +7 2252  JA7QVK IS0JHQ R-20 (x3)
211800  -1  833  JA7QVK UX5UO KO50 (x3)
212145 -14  473  IS0ZOD JA7QVK -10

160m

UTC    dB Audio  Message
211445  -1 2052  JA7QVK OH5KNL KP30 (x3)
211845 -12 2477  JA7QVK OH8SR R-11 (x2)
212645 -19 1548  JA7QVK SM2LIY R-06 (x2)
213115  +2  618  JA7QVK F5BZB -20 (x2)
201845  -1 2094  JA7QVK LA9GX R-18 (x2)
211200  +0  502  JA7QVK SV8JE KM08 (x2)
211330 +15 1133  JA7QVK S58T R-15 (x2)

40m

UTC    dB Audio  Message
210930  -2  564  JA7QVK IC8TEM JN70 (x4)
205130  -8 1612  JA7QVK 5B4AMM RR73
210730  +7  665  JA7QVK F1DJY -13 (x2)
210530  -6  535  JA7QVK IC8TEM JN70 (x2)
211530  -2 1447  JA7QVK SV5BYP -20 (x4)

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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