ON4AVV — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Belgium Most frequent locator attributed to this token: JO11

Receiver-side FT8 activity involving ON4AVV, decoded by SO8OO in southeastern Poland. 139 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, across 3 UTC dates in the available aggregate history. Observed between 2026-07-23 and 2026-08-30.

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 139 FT8 messages attributed to ON4AVV as the transmitting token by decoded message structure across 3 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (88%), followed by 80 m (7%) and 40 m (5%). Most decodes (88%) fell within the six-hour window 08:00-14:00 UTC. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (96%); the estimated median was +3 dB.

Overview

139

Messages attributed

UTC dates decoded

Active 15-min windows

+3 dB

Estimated median S/N

Bands

80m · 10 40m · 7 20m · 122

First attributed message: 2026-07-23
Last attributed message: 2026-08-30 13:47 UTC

Observed FT8 message patterns

Attributed sample: 139 messages
Active dates: 3 UTC dates
Estimated median S/N: +3 dB
Estimated 10th-90th percentile: -7 to +10 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 0, moderate (-15 to -9 dB) 6, strong (≥ -8 dB) 133.

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.

Frequent counterpart tokens observed at SO8OO

Tokens most often paired with ON4AVV in decoded directed-looking exchanges:

4O4DB · Montenegro 9A4ZM · Croatia EA1IOK · Spain EB3JT · Spain IQ4JO · Italy LY2EW · Lithuania OE8RPK · Austria OH3OJ · Finland RU3T · European Russia S57CT · Slovenia SP3IPA · Poland SP6AXW · Poland

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 ON4AVV

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: JO11 · 56 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,331 km (approx.)
Last such locator decoded: 2026-08-30 13:47 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	ON4AVV S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-13 12:15	40m	- / -	HG8LXL	-1 / -	3	Partial capture
08-30 23:17	20m	- / -	SP1ZMO	-3 / -	4	Partial capture
08-30 13:44	20m	+6 / -	VO1IV	- / -	6	Partial capture
08-30 13:32	20m	+2 / -	OE8PIT	- / -8	4	Partial capture
08-30 13:29	20m	+3 / -	LA1SNA	- / -11	7	Partial capture
08-30 13:25	20m	-3 / -	UA3NFG	- / -2	7	Partial capture
08-30 13:19	20m	0 / -	S57CT	- / +9	5	✓ Closing fragment
08-30 13:15	20m	- / -	OE9GWV	+2 / -	5	Partial capture
08-30 13:14	20m	-1 / -	SP3IPA	- / -25	2	✓ Closing fragment
08-30 13:08	20m	-1 / -	US2YW	- / -	7	✓ Closing fragment
08-30 12:52	20m	+4 / -10	IQ4JO	+2 / -	5	✓ Full exchange observed
08-30 12:48	20m	+10 / -	4O4DB	- / +8	3	✓ Closing fragment
08-30 12:47	20m	+8 / -	YU7DES	- / +1	2	✓ Closing fragment
08-30 12:45	20m	+6 / -	IN3LHF	- / +8	3	Partial capture
08-30 12:42	20m	+5 / -	9A4ZM	- / -3	2	✓ Closing fragment
08-30 12:40	20m	+6 / -	SP6AXW	- / -16	2	✓ Closing fragment
08-30 12:40	20m	+8 / -12	OH3OJ	-10 / -7	4	✓ Full exchange observed
08-30 12:39	20m	+8 / -	UT7UJ	- / +5	2	✓ Closing fragment
08-30 12:33	20m	+6 / -	IQ4JO	-1 / -1	7	Partial capture
08-30 12:24	20m	-7 / -	UT7UJ	- / +4	2	Partial capture
08-30 12:21	20m	+2 / -	9A4ZM	- / +3	5	Partial capture
08-30 12:20	20m	+12 / -	OE8RPK	- / -11	2	✓ Closing fragment
08-30 09:07	20m	+3 / -9	DF8TN	-7 / -	14	Partial capture
08-30 09:07	20m	- / -	DH5BM	-4 / -	3	Partial capture
08-30 09:06	20m	- / -	F4BYA	+13 / -	3	Partial capture
08-23 08:22	20m	0 / -	G4JEB	- / -13	8	Partial capture
08-23 08:19	20m	-2 / -	EA1IOK	-12 / -	3	✓ Closing observed
08-23 08:18	20m	+4 / -8	RU3T	+3 / +8	4	✓ Full exchange observed
08-02 16:48	20m	- / -	EA5JYL	-8 / -	3	Partial capture
08-02 16:44	20m	- / -	EA5JYL	-8 / -	2	Partial capture
08-02 16:43	20m	- / -	TA4SSK	-14 / -	3	Partial capture
08-02 15:51	40m	- / -3	OZ9FF	-11 / -	2	✓ Closing fragment
07-23 19:55	80m	- / -	9A4ZM	+20 / -	3	Partial capture
07-23 19:53	80m	-5 / -12	<...>	-8 / -	5	Partial capture
07-23 19:51	80m	- / -	DO1ID	+15 / -	3	Partial capture
07-23 19:49	40m	- / -	DH0GBC	0 / -	2	Partial capture
07-23 19:49	40m	- / -	DL3JHK	-2 / -	2	Partial capture
07-23 19:45	40m	-8 / -3	F6BHK	-8 / +3	2	Partial capture
07-23 19:40	40m	- / -	9A4ZM	0 / -	3	Partial capture
07-23 19:35	40m	- / +7	OK7TB	-7 / -	3	✓ Closing fragment
07-23 19:34	40m	- / -	DL3JHK	-5 / -	3	Partial capture
07-23 19:31	40m	- / -	DL3IAK	-12 / -	2	Partial capture
07-23 19:31	40m	-4 / -	S51PV	-14 / -22	2	Partial capture
07-23 19:18	40m	- / -	DL9KM	-11 / -	4	Partial capture
07-23 19:13	40m	- / -	ON6SAT	-13 / -	2	✓ Closing fragment
07-23 19:11	40m	- / -	US2UM	+10 / -	2	Partial capture
07-23 19:05	20m	- / -11	YO4NF	+5 / -	2	Partial capture

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
194130  -2  397  ON4AVV 9A4ZM JN86
194345  -5  400  IW1PVT ON4AVV RR73
194530  -8  402  ON4AVV F6BHK R-03
194545  -8  400  F6BHK ON4AVV +03
194615  -5  400  IZ4JMA ON4AVV -09
194915  -9  401  CQ ON4AVV JO11
194930  -2  401  ON4AVV DL3JHK JO62
194930  +3  361  ON4AVV DH0GBC JN69
195000  -1  401  ON4AVV DL3JHK JO62
195000  -2  361  ON4AVV DH0GBC JN69
155130 -11 2312  ON4AVV OZ9FF -03 (x2)
121500  -3 1647  ON4AVV HG8LXL KN06 (x3)

20m

UTC    dB Audio  Message
133215  +8  954  LA1SNA ON4AVV -11
133245  +4  954  OE8PIT ON4AVV -08 (x4)
134445  +9  953  VO1IV ON4AVV JO11 (x6)
231730  -5 1579  ON4AVV SP1ZMO JO73 (x4)

80m

UTC    dB Audio  Message
195130 +14  383  ON4AVV DO1ID JO41
195145  -2  875  CQ ON4AVV JO11                        a1
195200 +16  383  ON4AVV DO1ID JO41
195215  +2  375  CQ ON4AVV JO11
195230 +16  383  ON4AVV DO1ID JO41
195245  -9  375  CQ ON4AVV JO11
195315  -3  375  <...> ON4AVV JO11 (x2)
195400  -6  375  ON4AVV <...> -12
195415  -8  376  <...> ON4AVV JO11
195430 -10  376  ON4AVV <...> -08
195500 +20  371  ON4AVV 9A4ZM JN86
195515 -11  376  CQ ON4AVV JO11                        a1
195530 +19  372  ON4AVV 9A4ZM JN86 (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.

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