F4JOF — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: France Most frequent locator attributed to this token: JN35

Receiver-side FT8 activity involving F4JOF, decoded by SO8OO in southeastern Poland. 94 FT8 messages attributed to this token as transmitter, on 40m, 20m, across 5 UTC dates in the available aggregate history. Observed between 2026-06-10 and 2026-09-13.

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 94 FT8 messages attributed to F4JOF as the transmitting token by decoded message structure across 5 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (94%), followed by 20 m (6%). Most decodes (76%) fell within the six-hour window 15:00-21:00 UTC. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (67%); the estimated median was -5 dB.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-5 dB

Estimated median S/N

Bands

40m · 88 20m · 6

First attributed message: 2026-06-10
Last attributed message: 2026-09-13 15:49 UTC

Observed FT8 message patterns

Attributed sample: 94 messages
Active dates: 5 UTC dates
Estimated median S/N: -5 dB
Estimated 10th-90th percentile: -16 to +1 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 14, moderate (-15 to -9 dB) 17, strong (≥ -8 dB) 63.

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 F4JOF in decoded directed-looking exchanges:

A61DD · United Arab Emirates E74K · Bosnia-Herzegovina EA8UP · Canary Islands IU8RFW · Italy MW0USK · Wales OK2PB · Czech Republic PA2RO · Netherlands R2FDP · Kaliningrad RW1CW · European Russia RW4HB · European Russia UN8DAW · Kazakhstan

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 F4JOF

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: JN35 · 57 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,209 km (approx.)
Last such locator decoded: 2026-09-13 15:49 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	F4JOF S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-13 08:17	40m	-15 / -	EA1AEC	- / -2	5	Partial capture
09-13 08:13	40m	-15 / -10	OK2PB	0 / -2	8	✓ Full exchange observed
09-12 08:18	40m	-17 / -2	PA2RO	-12 / -	4	✓ Closing observed
09-07 21:01	40m	-5 / -	R2FDP	- / 0	5	✓ Closing fragment
09-07 20:58	40m	-4 / -1	SN40KZE	+12 / +3	4	Partial capture
09-07 20:54	40m	-1 / -	D2ACE	- / -	7	Partial capture
09-07 20:52	40m	+2 / +1	IU8RFW	-8 / -	4	✓ Closing observed
09-07 20:49	40m	-5 / -	SV8/F2VX	- / -	3	Partial capture
09-07 20:47	40m	-5 / -	UN8DAW	- / -	3	Partial capture
09-07 20:40	40m	-2 / -	D2ACE	- / -	11	Partial capture
09-07 20:23	40m	-3 / -17	A61DD	-11 / -19	4	✓ Full exchange observed
09-07 20:17	40m	- / -	GJ0KYZ	-3 / -	3	Partial capture
09-07 20:16	40m	-6 / -7	EA8UP	-13 / +5	3	✓ Full exchange observed
09-07 19:51	40m	-4 / -	SV9/SV1ABB	- / -4	3	Partial capture
09-07 19:45	40m	0 / -	BG5JGG	- / -	3	Partial capture
09-07 19:36	40m	-6 / -	A61DD	- / -	5	Partial capture
09-07 19:32	40m	-3 / -18	RW4HB	-2 / -13	8	✓ Full exchange observed
09-07 19:29	40m	0 / -	E74K	- / -17	5	✓ Closing fragment
09-07 19:27	40m	-4 / -	RW1CW	-20 / -14	3	✓ Closing observed
09-07 19:20	40m	-13 / -	VJ6X	- / -15	4	Partial capture
09-07 19:06	40m	-5 / -2	MW0USK	-2 / -	6	✓ Closing observed

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
201845  -5 2124  JI3VUB F4JOF JN35
081330 -16 2122  OK2PB F4JOF JN35 (x3)
081515  +3 1555  F4JOF OK2PB -10 (x2)
081600 -16 2122  OK2PB F4JOF R-02
081615  +0 1555  F4JOF OK2PB RR73
081630 -11 2122  OK2PB F4JOF 73
081730 -13 2122  EA1AEC F4JOF -02 (x5)
154900 -12 2123  LB6NK F4JOF JN35

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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