ON3CH — 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: Belgium Most frequent locator attributed to this token: JO20

Receiver-side FT8 activity involving ON3CH, decoded by SO8OO in southeastern Poland. 702 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, 10m, across 55 UTC dates in the available aggregate history. Observed between 2026-06-06 and 2026-10-18.

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 702 FT8 messages attributed to ON3CH as the transmitting token by decoded message structure across 55 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (50%), followed by 40 m (36%) and 80 m (11%). Most decodes (69%) fell within the six-hour window 16:00-22:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -17 dB.

Overview

702

Messages attributed

UTC dates decoded

183

Active 15-min windows

-17 dB

Estimated median S/N

Bands

80m · 79 40m · 256 20m · 350 10m · 17

First attributed message: 2026-06-06
Last attributed message: 2026-10-18 19:51 UTC

Observed FT8 message patterns

Attributed sample: 702 messages
Active dates: 55 UTC dates
Estimated median S/N: -17 dB
Estimated 10th-90th percentile: -24 to -9 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 410, moderate (-15 to -9 dB) 232, strong (≥ -8 dB) 60.

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 ON3CH in decoded directed-looking exchanges:

AN5CV · Spain ×4 DL2CZ · Fed. Rep. of Germany ×2 F1PBZ · France ×2 DH2RL · Fed. Rep. of Germany ×2 M1DDD · England ×2 PI4TS · Netherlands ×2 CR7BRV · Portugal DL1UDO · Fed. Rep. of Germany EA1FG · Spain EA8UP · Canary Islands EB5RCA · Spain F4HSB · France

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 ON3CH

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: JO20 · 557 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,194 km (approx.)
Last such locator decoded: 2026-10-18 19:51 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	ON3CH S/N	Counterpart	Counterpart S/N	Msgs	Capture
10-18 14:59	40m	-22 / -	F4DVP	- / -19	2	✓ Closing fragment
10-18 14:29	40m	-21 / 0	DK1XAM	-9 / -4	5	✓ Full exchange observed
10-16 10:10	40m	- / -	DH5HS	-22 / -	2	Partial capture
10-16 09:59	40m	- / -17	HB9ELE	-2 / -	2	✓ Closing fragment
10-16 09:45	40m	- / -19	OE5KBO	0 / -	3	✓ Closing fragment
10-16 09:35	40m	- / -22	SP6AMI	-2 / -	2	✓ Closing fragment
10-16 09:27	40m	- / -8	OH3MB	-8 / -	2	✓ Closing fragment
10-16 09:21	40m	- / -13	F1PBZ	-9 / -	2	Partial capture
10-15 17:31	40m	-17 / -	M1DDD	- / -	3	✓ Closing fragment
10-15 17:24	40m	-15 / -	M1DDD	- / -7	7	✓ Closing fragment
10-15 17:16	40m	-10 / -18	R2EN	-18 / -13	4	✓ Full exchange observed
10-11 18:48	40m	-20 / -	II5GG	- / -	2	Partial capture
10-11 17:23	40m	- / -20	II5GG	-7 / -	2	Partial capture
10-11 14:55	40m	- / -10	PA5WJB	-19 / -	3	✓ Closing fragment
10-11 14:05	40m	- / -8	ON7PR	-7 / -	3	✓ Closing fragment
10-10 15:30	40m	- / -8	PA7FK	-5 / -	3	✓ Closing fragment
10-10 15:13	40m	- / -9	DL4DW	+3 / -	3	✓ Closing fragment
10-09 19:22	40m	-16 / -	AN5CV	- / -	3	✓ Closing fragment
10-09 19:10	40m	-19 / -	AN5CV	- / -	4	✓ Closing fragment
10-09 19:01	40m	-20 / -	AN5CV	- / -	2	✓ Closing fragment
10-09 18:52	40m	-20 / -	AN5CV	- / -	8	✓ Closing fragment
10-09 17:17	40m	-18 / -	G5MJF	- / -	2	✓ Closing fragment
10-08 18:16	40m	- / -	OK1TRJ	-7 / -	2	Partial capture
10-08 18:01	40m	-14 / -	OZ1BM	- / -17	2	✓ Closing fragment
10-08 16:44	40m	-11 / -	CT2GQA	- / -26	4	Partial capture
10-08 08:39	40m	- / +8	DL5CG	-16 / -	3	✓ Closing fragment
10-07 19:33	40m	-18 / -	EA2FKI	- / -14	2	✓ Closing fragment
10-04 17:34	40m	- / -	M6DPS	-24 / -	2	Partial capture
10-03 15:02	40m	- / 0	DL9BUS	-12 / -	5	Partial capture
10-03 14:31	40m	- / 0	DK3NU	-2 / -	3	✓ Closing fragment
10-03 12:54	40m	- / -14	DD2ZN	-16 / -	2	Partial capture
10-02 20:23	40m	-22 / -	MM5DIT	- / -14	2	Partial capture
10-02 18:14	40m	- / -	R1TAX	-9 / -	2	Partial capture
09-29 19:05	80m	- / -18	PA4CC	+16 / -	2	✓ Closing fragment
09-26 18:16	40m	- / -	SQ5ROB	-11 / -	2	Partial capture
09-23 08:35	40m	- / -16	PE2K	-22 / -	2	Partial capture
09-23 08:19	40m	- / -	ON6DO	-15 / -	5	Partial capture
09-23 07:21	40m	- / -22	PI4TS	-17 / -	8	Partial capture
09-22 19:48	40m	- / -12	DF1IH	0 / -	2	✓ Closing fragment
09-15 07:03	40m	- / -9	I4BUQ	-9 / -	2	✓ Closing fragment
09-15 06:46	40m	- / -	SP3MYP	-18 / -	2	Partial capture
09-14 19:35	40m	-14 / -	DK5AN/P	-16 / -12	3	✓ Closing observed
09-14 17:30	40m	- / -24	S52DD	+6 / -	3	✓ Closing fragment
09-14 16:41	40m	-20 / 0	SP3SBY	-6 / -	4	✓ Closing observed
09-14 16:40	40m	-18 / -10	SP5IDR	-10 / -	3	✓ Closing observed
09-14 16:31	40m	-21 / -15	IT9CBE	-20 / -22	6	✓ Full exchange observed
09-13 19:56	40m	-20 / -17	R5AV	-2 / -	3	✓ Closing observed
09-13 19:43	40m	- / -14	OE6OCG	+4 / -	4	✓ Closing fragment
09-13 18:54	40m	-21 / -	IK1MJK/P	- / -	2	Partial capture
09-11 05:41	80m	- / -	HA3TBL	+3 / -	8	Partial capture

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
143015 -19 1837  DK1XAM ON3CH R-04
143030  -6  387  ON3CH DK1XAM RR73
143045 -23 1837  DK1XAM ON3CH 73
143415 -24 1836  CQ ON3CH JO20                         a1 (x7)
145945 -19 1835  F4DVP ON3CH -19 (x2)
150045 -21 1835  CQ ON3CH JO20                         a1
191545 -19 1720  SP5CTY ON3CH RR73
195115 -20 1720  CQ ON3CH JO20

80m

UTC    dB Audio  Message
191430 -19 1803  CQ ON3CH JO20 (x4)
053615 -11 1723  ON3CH DL3FBI JO40
054115  +0 2149  ON3CH HA3TBL JN86 (x8)
190515 +14  354  ON3CH PA4CC -18 (x2)

20m

UTC    dB Audio  Message
081645  -8 1869  CQ ON3CH JO20
081715  -8 1869  RX6DY ON3CH R-06 (x2)
082015  -9 1869  CQ ON3CH JO20 (x2)
091130 -20 1870  ON3CH I4VJC JN54 (x9)
092430  +4 2912  ON3CH F4BYA JN19

10m

UTC    dB Audio  Message
185300 -20 2083  CQ ON3CH JO20

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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