ON3RDH — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Belgium Most frequent locator attributed to this token: JO10

Receiver-side FT8 activity involving ON3RDH, decoded by SO8OO in southeastern Poland. 28 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, across 6 UTC dates in the available aggregate history. Observed between 2026-06-17 and 2026-08-31.

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 28 FT8 messages attributed to ON3RDH as the transmitting token by decoded message structure across 6 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (61%), followed by 80 m (36%) and 40 m (4%). Most decodes (61%) fell within the six-hour window 02:00-08:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -9 dB.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-9 dB

Estimated median S/N

Bands

80m · 10 40m · 1 20m · 17

First attributed message: 2026-06-17
Last attributed message: 2026-08-31 12:41 UTC

Observed FT8 message patterns

Attributed sample: 28 messages
Active dates: 6 UTC dates
Estimated median S/N: -9 dB
Estimated 10th-90th percentile: -16 to -1 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 3, moderate (-15 to -9 dB) 13, strong (≥ -8 dB) 12.

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 ON3RDH in decoded directed-looking exchanges:

RN6MA · European Russia Z62NS · Republic of Kosovo DJ0MAB · Fed. Rep. of Germany IZ1CRA · Italy

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 ON3RDH

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: JO10 · 12 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,335 km (approx.)
Last such locator decoded: 2026-08-31 12:39 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	ON3RDH S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-15 08:49	40m	- / -4	DJ0MAB	-20 / -	4	✓ Closing fragment
08-30 13:25	20m	-9 / -	YL3QZ	- / 0	3	Partial capture
08-27 08:36	40m	- / -	OE8PIT	-16 / -	4	Partial capture
08-26 16:54	20m	- / -	R7OV	-1 / -	5	Partial capture
08-26 16:51	40m	- / -	DJ0MAB	-2 / -	4	Partial capture
08-26 16:48	40m	- / -1	IZ1CRA	-12 / -	2	✓ Closing fragment
08-26 16:48	40m	- / -2	IK0CHU	-5 / -	2	Partial capture
08-26 07:11	20m	- / -	RV6F	-6 / -	4	Partial capture
08-26 07:07	20m	- / -6	RN6MA	+8 / -	4	✓ Closing fragment
08-26 07:01	20m	-4 / -	VK3JMA	- / -	5	Partial capture
06-28 07:17	20m	- / -	Z62NS	-14 / -	2	✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
164900  -6 1328  ON3RDH IK0CHU -02
164915 -10 1397  ON3RDH IZ1CRA RR73
165115  +3 1396  ON3RDH DJ0MAB JN49 (x4)
083615 -18 1409  ON3RDH OE8PIT JN66 (x4)
073345 -11 2638  ON3RDH F1PBZ -11
084930 -21 1378  ON3RDH DJ0MAB JN49 (x4)

20m

UTC    dB Audio  Message
165445  -1 1435  ON3RDH R7OV KN87 (x3)
165600  -8 1450  TA3F ON3RDH +01
165615  -3 1435  ON3RDH R7OV KN87 (x2)
080800 -12 1450  HB9MZI ON3RDH +17
132200 -11 1724  CQ ON3RDH JO10
132230 -11 1724  YU7DES ON3RDH +01
132530  -9 1724  YL3QZ ON3RDH +00 (x3)
123830  -7 1515  CQ ON3RDH JO10 (x2)
124100  -9 1516  SP9UPH ON3RDH RRR

80m

UTC    dB Audio  Message
042115 -20 1689  CQ ON3RDH JO10
042130 -19 1503  ON3RDH EB1LA IN73

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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