ON3RV — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Belgium Most frequent locator attributed to this token: JO21

Receiver-side FT8 activity involving ON3RV, decoded by SO8OO in southeastern Poland. 1,029 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, 10m, across 34 UTC dates in the available aggregate history. Observed between 2026-06-06 and 2026-09-16.

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 1,029 FT8 messages attributed to ON3RV as the transmitting token by decoded message structure across 34 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (43%), followed by 80 m (30%) and 20 m (15%). Most decodes (87%) fell within the six-hour window 19:00-01:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -12 dB.

Overview

1,029

Messages attributed

UTC dates decoded

147

Active 15-min windows

-12 dB

Estimated median S/N

Bands

80m · 305 40m · 444 20m · 157 10m · 123

First attributed message: 2026-06-06
Last attributed message: 2026-09-16 21:08 UTC

Observed FT8 message patterns

Attributed sample: 1,029 messages
Active dates: 34 UTC dates
Estimated median S/N: -12 dB
Estimated 10th-90th percentile: -19 to -2 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 303, moderate (-15 to -9 dB) 383, strong (≥ -8 dB) 343.

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 ON3RV in decoded directed-looking exchanges:

F1PBZ · France ×5 DK4ET · Fed. Rep. of Germany ×2 IK4LZH · Italy ×2 5P1KZX · Denmark 5Z4VJ · Kenya DL3RAJ · Fed. Rep. of Germany F4NBB · France IK2REA · Italy IS0AEL · Sardinia NP4VA · Puerto Rico 9A7BB · Croatia CT7AXN · Portugal

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 ON3RV

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: JO21 · 700 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,192 km (approx.)
Last such locator decoded: 2026-09-16 21:08 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	ON3RV S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-16 21:01	80m	- / -	HF5A	+10 / -	2	Partial capture
09-16 21:00	80m	- / -18	EU1EU	-6 / -	2	Partial capture
09-16 20:55	80m	- / -	HF5A	-2 / -	2	Partial capture
09-16 20:51	80m	-12 / -	DF3YG	- / -	2	✓ Closing fragment
09-16 20:48	80m	-15 / -	DL7UKM	-7 / -13	3	Partial capture
09-16 20:48	80m	-11 / -7	LB9VH	-23 / -3	5	✓ Full exchange observed
09-16 09:35	40m	- / -3	DG1KFR	-14 / -	7	Partial capture
09-16 09:31	40m	- / -	SQ9LOJ	-5 / -	4	Partial capture
09-16 09:16	40m	- / -12	SQ7RJZ	-22 / -	4	Partial capture
09-15 21:17	40m	-3 / -	MW0DNF	- / +4	5	Partial capture
09-15 21:11	40m	+2 / +1	GI8RPM	-13 / +8	3	✓ Full exchange observed
09-15 21:07	80m	-6 / -	OZ1IVA	- / -17	2	✓ Closing fragment
09-15 21:04	80m	- / -	DL9KM	-11 / -	5	Partial capture
09-15 21:04	80m	-6 / +2	DA6BR	-24 / -	2	✓ Closing observed
09-15 21:02	80m	-3 / -	GM0HTT	- / -	2	✓ Closing fragment
09-15 20:59	80m	- / -8	ON1BH	-10 / -	3	Partial capture
09-15 20:34	40m	-14 / +5	IU6WSB	0 / -15	5	✓ Full exchange observed
09-15 20:31	40m	-7 / -	HG0NPJ	- / -2	2	✓ Closing fragment
09-15 20:22	40m	-8 / -11	EA2DYB	+8 / 0	5	✓ Full exchange observed
09-13 08:52	40m	- / -12	SP2CG	-5 / -	3	✓ Closing fragment
09-13 08:41	40m	- / 0	DJ1OJ	0 / -	3	✓ Closing fragment
09-13 07:46	40m	- / -	OE1SGS	+1 / -	3	Partial capture
09-13 07:43	40m	- / -	HA3HZ	-4 / -	5	Partial capture
09-11 15:03	40m	- / -15	IZ0CUX	-9 / -	3	✓ Closing fragment
09-11 14:53	40m	- / -3	I4BUQ	-13 / -	2	✓ Closing fragment
09-11 14:26	40m	- / -16	OZ9FF	+2 / -	2	✓ Closing fragment
09-11 14:22	40m	- / -3	SM6FZO	-15 / -	5	✓ Closing fragment
09-11 14:21	40m	- / -10	F1UNR	-14 / -	2	✓ Closing fragment
09-11 14:20	40m	-18 / -	G0RVY	- / -	2	✓ Closing fragment
09-11 14:18	40m	-22 / -	F4LNC	- / +2	2	✓ Closing fragment
09-11 08:21	40m	- / -	DL7EDU	+1 / -	4	Partial capture
09-10 06:13	40m	- / -2	IU4TQQ	-20 / -	2	✓ Closing fragment
09-09 09:14	40m	- / -	DF0AWG	-4 / -	2	Partial capture
09-09 07:24	40m	-21 / -10	ON1DGN	-22 / -21	3	✓ Full exchange observed
09-09 07:21	40m	-19 / +9	DL4MFC	-15 / +7	4	✓ Full exchange observed
08-31 20:44	40m	-12 / +1	DF8RU	+9 / -7	5	✓ Full exchange observed
08-31 20:25	20m	- / -12	F4NBB	+6 / -	2	✓ Closing fragment
08-31 20:22	20m	- / -8	5Z4VJ	-1 / -	3	✓ Closing fragment
08-31 20:05	40m	-8 / -16	M0EBM	-17 / -6	3	✓ Full exchange observed
08-31 20:04	40m	-19 / -7	IR7MGGC	-9 / -9	2	Partial capture
08-31 20:03	40m	-6 / 0	DL5RCN	+14 / +1	4	✓ Full exchange observed
08-31 19:58	40m	-12 / -	PA3ARI	- / +1	2	Partial capture
08-31 09:34	40m	- / -	SP9W	-7 / -	3	Partial capture
08-30 17:29	20m	-11 / -	UT7UJ	- / -6	9	Partial capture
08-30 17:22	20m	-12 / -	YB0KEM	- / -24	2	Partial capture
08-30 16:42	20m	-10 / +2	IS0AEL	-9 / 0	5	✓ Full exchange observed
08-23 12:17	20m	- / -	ON1AJ	+10 / -	5	Partial capture
08-23 11:27	40m	- / -13	OE4BHF	-13 / -	8	Partial capture
08-23 11:01	40m	- / -	DK3NU	-8 / -	2	✓ Closing fragment
08-23 10:59	40m	- / -	OK1XQD	-4 / -	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
093245  -5 2263  ON3RV SQ9LOJ JO90 (x2)
093515 -18 2344  ON3RV DG1KFR R-03 (x7)
095415 -19 1993  ON3RV DL6ZFG R-06
210330  +2 2325  CQ ON3RV JO21 (x5)

80m

UTC    dB Audio  Message
205230 -14 2289  DF3YG ON3RV RR73
205300  -9 2289  CQ ON3RV JO21 (x6)
205545  -5 2385  ON3RV HF5A JO92
205600 -10 2289  CQ ON3RV JO21
205615  +0 2385  ON3RV HF5A JO92
210015  -6 1002  ON3RV EU1EU -18 (x2)
210100  -7 2289  CQ ON3RV JO21
210115 +12  376  ON3RV HF5A JO92 (x2)

20m

UTC    dB Audio  Message
173700  -9 1316  CQ ON3RV JO21 (x9)
201930 -20 2336  2E0UMF ON3RV R-09
202215  -1 2369  ON3RV 5Z4VJ KI88 (x3)
202545 +10 2336  ON3RV F4NBB -12 (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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