JR7VHZ — 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: QM09

Receiver-side FT8 activity involving JR7VHZ, decoded by SO8OO in southeastern Poland. 16 FT8 messages attributed to this token as transmitter, on 80m, 20m, across 3 UTC dates in the available aggregate history. Observed between 2026-06-06 and 2026-10-29.

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 16 FT8 messages attributed to JR7VHZ 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 (75%), followed by 20 m (25%). 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 · 12 20m · 4

First attributed message: 2026-06-06
Last attributed message: 2026-10-29 15:38 UTC

Observed FT8 message patterns

Attributed sample: 16 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) 6, moderate (-15 to -9 dB) 5, strong (≥ -8 dB) 5.

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 JR7VHZ in decoded directed-looking exchanges:

R6NA · European Russia ×2 E79D · Bosnia-Herzegovina HA7XL · Hungary HB9BEP · Switzerland LY1DY · Lithuania LZ1GC · Bulgaria LZ5EO · Bulgaria LZ7MM · Bulgaria OE8TED · Austria OH3NXW · Finland OH5KNL · Finland OK2BUZ · Czech Republic

Most frequent locator attributed to JR7VHZ

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: QM09 · 6 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 8,434 km (approx.)
Last such locator decoded: 2026-10-29 15:38 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	JR7VHZ S/N	Counterpart	Counterpart S/N	Msgs	Capture
11-03 17:15	80m	- / -15	YT7DX	+14 / -	2	✓ Closing fragment
11-03 15:52	80m	- / -	RW9AW	-20 / -	3	Partial capture
11-03 15:51	80m	- / -7	RU3GF	-16 / -	2	✓ Closing fragment
11-03 15:47	80m	- / -18	RZ3ZY	-13 / -	3	✓ Closing fragment
11-03 15:44	80m	- / -15	YO7CFD	+1 / -	4	✓ Closing fragment
11-03 15:42	80m	- / -4	LZ1GC	+6 / -	4	✓ Closing fragment
11-03 15:42	80m	- / -5	RU3GF	+6 / -	2	Partial capture
11-03 15:42	80m	- / -14	LZ7MM	+1 / -	2	✓ Closing fragment
11-03 15:37	80m	- / -	OM3PC	+12 / -	4	Partial capture
11-03 14:45	80m	- / -6	YO9IJP	+8 / -	2	✓ Closing fragment
11-01 17:46	80m	- / -	DK1AQ	+7 / -	7	Partial capture
11-01 17:45	80m	- / -19	OE8TED	+19 / -	6	✓ Closing fragment
11-01 17:44	80m	- / -24	R9GM	+6 / -	3	Partial capture
11-01 17:39	80m	- / -	IS0ZOD	+7 / -	4	Partial capture
11-01 17:19	80m	- / -18	UT5EL	+19 / -	2	✓ Closing fragment
10-31 20:14	80m	- / -12	SV1DKR	-21 / -	2	✓ Closing fragment
10-31 20:10	80m	- / -11	E79D	+24 / -	3	✓ Closing fragment
10-31 18:36	80m	- / -12	SV1VJ	-3 / -	3	Partial capture
10-31 18:35	80m	- / -15	YO7CFD	-1 / -	5	Partial capture
10-31 18:33	80m	- / -11	RK6OQ	+3 / -	3	✓ Closing fragment
10-31 15:04	80m	- / -	UB4FGK	-12 / -	2	Partial capture
10-30 15:15	80m	- / -18	SV2DCD	+6 / -	2	✓ Closing fragment
10-30 15:11	80m	- / -	HA1TNX	+10 / -	3	Partial capture
10-30 15:09	80m	- / -24	RK6OQ	+3 / -	5	Partial capture
10-30 15:09	80m	- / -	R7CD	-12 / -	2	✓ Closing fragment
10-30 15:06	80m	- / -	HA1TNX	+11 / -	3	Partial capture
10-30 15:04	80m	- / -	RK6OQ	+6 / -	2	Partial capture
10-29 15:57	80m	- / -4	RU4SS	-17 / -	3	✓ Closing fragment
10-29 15:53	80m	- / -5	OH3NXW	-2 / -	2	✓ Closing fragment
10-29 15:53	80m	- / -16	RL6ZK	-13 / -	6	✓ Closing fragment
10-29 15:50	80m	- / -25	UA6XY	-14 / -	2	Partial capture
10-29 15:45	80m	- / -20	UA3QNA	+14 / -	2	✓ Closing fragment
10-29 15:44	80m	- / -16	HA7XL	+16 / -	2	✓ Closing fragment
10-29 15:38	80m	- / -24	LZ2EV	+5 / -	2	Partial capture
10-29 15:31	80m	-14 / -	RW6ASB	-11 / -14	7	Partial capture
10-29 15:31	80m	-14 / -	R3KLE	-19 / -	2	✓ Closing observed
10-29 15:30	80m	- / -	RO2X	-11 / -	2	Partial capture
10-29 15:28	80m	- / -24	UB6HWF	-14 / -	4	✓ Closing fragment
10-29 15:28	80m	- / -	OK8DCC	-1 / -	3	Partial capture
10-29 15:28	80m	- / -15	R3KAB	-12 / -	2	Partial capture
10-29 15:27	80m	- / -11	UX5UO	+5 / -	3	✓ Closing fragment
10-29 15:26	80m	- / -16	RZ7KR	0 / -	2	✓ Closing fragment
10-29 15:24	80m	- / -13	R7HL	-8 / -	4	✓ Closing fragment
10-29 15:23	80m	- / -24	OK2BUZ	+14 / -	3	✓ Closing fragment
10-29 15:21	80m	- / -14	RA6BL	+8 / -	3	✓ Closing fragment
10-29 15:20	80m	- / -12	R7KR	+4 / -	2	✓ Closing fragment
10-29 15:10	80m	- / -	SM6JMZ	-4 / -	2	Partial capture
10-29 15:09	80m	- / -9	R3RB	-22 / -	2	✓ Closing fragment
10-29 15:07	80m	- / -15	RU3VT	-19 / -	2	Partial capture
10-29 15:00	80m	- / -15	HB9BEP	-1 / -	3	✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

80m

UTC    dB Audio  Message
154745 -12 1427  JR7VHZ RZ3ZY KO90 (x3)
155000  +6 1798  JR7VHZ IT9AUG -09
155100 -17  204  JR7VHZ RU3GF -07 (x2)
155200 -20  201  JR7VHZ RW9AW MO05 (x3)
171530 +12  997  JR7VHZ YT7DX -15 (x2)
171630  -7 2481  JR7VHZ RD7LC -20
153045  -5 2705  JR7VHZ DO1AYJ -14
153445  -6  256  JR7VHZ LZ5EO 73
153745 -23  256  JR7VHZ R3KF -14

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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