JA2VBK — 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: PM94

Receiver-side FT8 activity involving JA2VBK, decoded by SO8OO in southeastern Poland. 9 FT8 messages attributed to this token as transmitter, on 80m, 20m, across 4 UTC dates in the available aggregate history. Observed between 2026-07-18 and 2026-10-15.

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 9 FT8 messages attributed to JA2VBK as the transmitting token by decoded message structure across 4 UTC dates in the available aggregate history. The largest monitored-band total was 80 m (89%), followed by 20 m (11%). In this small sample, the estimated median decoder S/N was -21 dB; no usual signal pattern is inferred.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-21 dB

Estimated median S/N

Bands

80m · 8 20m · 1

First attributed message: 2026-07-18
Last attributed message: 2026-10-15 20:26 UTC

Observed FT8 message patterns

Attributed sample: 9 messages
Active dates: 4 UTC dates
Estimated median S/N: -21 dB
S/N percentile sample: Too small
Recurring-pattern threshold: Not met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 9, moderate (-15 to -9 dB) 0, 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 JA2VBK in decoded directed-looking exchanges:

OT7K · Belgium ×2 ON7NQ · Belgium 9A5E · Croatia F4IFK · France IK5SRB · Italy IZ8CLM · Italy UR4LBG · Ukraine 9A5TW · Croatia F6CTT · France HA7XL · Hungary IV3VFR · Italy LX1JH · Luxembourg

Most frequent locator attributed to JA2VBK

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: PM94 · 7 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 8,783 km (approx.)
Last such locator decoded: 2026-10-12 21:02 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	JA2VBK S/N	Counterpart	Counterpart S/N	Msgs	Capture
10-20 19:59	40m	- / -	R3DQB	-5 / -	2	Partial capture
10-20 19:56	40m	- / -	RV6AVU	-2 / -	2	Partial capture
10-20 19:53	40m	- / -	RV6AVU	-1 / -	2	Partial capture
10-20 19:46	40m	- / -	DL2DT	-2 / -	2	Partial capture
10-20 19:46	40m	- / 0	UR4LBG	-1 / -	13	✓ Closing fragment
10-20 19:45	40m	- / -19	YO4LUP	-16 / -	3	Partial capture
10-20 19:41	40m	- / -	R6FX	-2 / -	4	Partial capture
10-18 22:09	40m	- / -24	EA5JLB	-11 / -	3	Partial capture
10-18 21:58	40m	- / -16	IK5SRB	-10 / -	6	✓ Closing fragment
10-18 21:51	40m	- / -12	UT4VL	-12 / -	3	Partial capture
10-17 20:24	80m	- / -	RO2X	-1 / -	3	Partial capture
10-15 20:43	80m	- / -20	ON4IQ	+14 / -	4	✓ Closing fragment
10-15 20:36	80m	- / -4	OH6XX	+9 / -	2	✓ Closing fragment
10-15 20:24	80m	- / -18	F6CTT	+12 / -	3	✓ Closing fragment
10-15 20:23	80m	-21 / -15	LX1JH	+7 / -15	5	✓ Full exchange observed
10-15 20:22	80m	- / -13	OH8WW	-4 / -	2	✓ Closing fragment
10-14 21:31	40m	- / -17	IZ8CLM	-11 / -	2	✓ Closing fragment
10-12 21:44	40m	- / -	IK1LZF	-13 / -	3	Partial capture
10-12 21:36	40m	- / -	OE3HPT	-20 / -	5	Partial capture
10-12 21:01	80m	-20 / -	E70SZ	- / -	2	Partial capture
10-12 20:58	80m	- / -	9A5XXX	0 / -	3	Partial capture
10-12 20:56	80m	- / -19	HA7XL	+1 / -	4	✓ Closing fragment
10-04 19:11	80m	- / -20	OT7K	+16 / -	2	✓ Closing fragment
10-04 19:03	80m	- / -17	SV8JE	+8 / -	5	✓ Closing fragment
10-04 19:00	80m	- / -17	SV1QEW	-10 / -	8	✓ Closing fragment
10-04 18:59	80m	- / -17	OT7K	+10 / -	3	✓ Closing fragment
10-04 18:55	80m	- / -17	RA3ZH	-6 / -	4	Partial capture
09-29 16:50	80m	- / -22	SV6JHA	-10 / -	4	Partial capture
09-29 16:49	80m	- / -19	DK7ZT	0 / -	4	Partial capture
09-29 16:38	80m	- / -	OE2GEN	+11 / -	3	Partial capture
09-29 16:37	80m	- / -16	IV3VFR	+16 / -	4	✓ Closing fragment
09-29 16:37	80m	- / -24	OK2BUZ	+16 / -	4	Partial capture
09-29 16:35	80m	- / -	R3RB	-7 / -	11	Partial capture
09-29 16:22	80m	- / -	OE1SGU	+13 / -	3	Partial capture
09-29 16:20	80m	- / -	R3RB	-3 / -	22	Partial capture
09-29 16:18	80m	- / -24	R2WAF	-13 / -	7	Partial capture
09-29 16:18	80m	- / -21	UA4FKT	-4 / -	4	✓ Closing fragment
09-29 16:17	80m	-17 / -15	RK6OZ	-8 / -16	3	✓ Full exchange observed
09-29 16:15	80m	-22 / -	R6OU	- / -	2	Partial capture
09-29 16:04	80m	- / 0	OH5LF	+8 / -	5	✓ Closing fragment
09-22 21:43	40m	- / -14	9A5E	-10 / -	2	✓ Closing fragment
08-12 22:16	20m	- / -10	ON7NQ	-3 / -	4	✓ Closing fragment
08-04 12:44	20m	- / -	PG1C	-13 / -	3	Partial capture

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
194945  -9 2218  JA2VBK RV6AVU KN94
195015  +4 2436  JA2VBK UR4LBG KN89 (x6)
195315  -2 2271  JA2VBK RV6AVU KN94 (x4)
195800 -11 2418  JA2VBK HA7XL JN97
195930  -5  644  JA2VBK R3DQB KO94 (x2)
200700  +2  666  JA2VBK F4IFK RR73

80m

UTC    dB Audio  Message
202515  +8 2439  JA2VBK F6CTT 73
202545 +11 2439  JA2VBK LX1JH -15
202600 -21 2439  LX1JH JA2VBK R-15
202615 +14 2439  JA2VBK LX1JH RR73
203615  +8 1881  JA2VBK OH6XX -04 (x2)
204045 +13 2643  JA2VBK ON4IQ JO20 (x5)
201245 -13 1203  JA2VBK UX1AA 73
202445  +2 2362  JA2VBK RO2X KO74 (x3)

20m

UTC    dB Audio  Message
124430 -11 2489  JA2VBK PG1C JO33 (x3)
221630  +0 3008  JA2VBK ON7NQ JO21 (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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