F4JZW — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: France Most frequent locator attributed to this token: JN08

Receiver-side FT8 activity involving F4JZW, decoded by SO8OO in southeastern Poland. 2,432 FT8 messages attributed to this token as transmitter, on 40m, 20m, across 19 UTC dates in the available aggregate history. Observed between 2026-06-13 and 2026-09-04.

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 2,432 FT8 messages attributed to F4JZW as the transmitting token by decoded message structure across 19 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (80%), followed by 40 m (20%). The busiest six-hour window was 18:00-00:00 UTC, containing 46% of decodes. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (72%); the estimated median was -2.2 dB.

Overview

2,432

Messages attributed

UTC dates decoded

233

Active 15-min windows

-2.2 dB

Estimated median S/N

Bands

40m · 484 20m · 1,948

First attributed message: 2026-06-13
Last attributed message: 2026-09-04 22:03 UTC

Observed FT8 message patterns

Attributed sample: 2,432 messages
Active dates: 19 UTC dates
Estimated median S/N: -2.2 dB
Estimated 10th-90th percentile: -15 to +8 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 234, moderate (-15 to -9 dB) 445, strong (≥ -8 dB) 1,753.

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 F4JZW in decoded directed-looking exchanges:

DL1YAW/P · Fed. Rep. of Germany ×3 5P1KZX · Denmark ×2 AD9GE · United States ×2 DJ2MS · Fed. Rep. of Germany ×2 EC3A · Spain ×2 HA1BF · Hungary ×2 HB9SFL · Switzerland ×2 JA0LFV · Japan ×2 KC0VTJ · United States ×2 KS1WK · United States ×2 R3NCG · European Russia ×2 TA2EE · Asiatic Turkey ×2

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 F4JZW

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: JN08 · 1,626 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,514 km (approx.)
Last such locator decoded: 2026-09-04 22:03 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	F4JZW S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-04 22:04	40m	- / -	DL6AZ	+1 / -	2	Partial capture
09-04 22:03	40m	- / -17	UN7PPV	-17 / -	4	Partial capture
09-04 05:58	40m	- / -7	F1PBZ	-6 / -	3	Partial capture
09-04 05:42	40m	-5 / -	HK3YL	- / -	10	Partial capture
09-04 05:41	40m	- / -	OK1DBE	+4 / -	4	Partial capture
09-04 05:35	40m	- / -	F1PSX	-16 / -	5	Partial capture
09-04 05:27	40m	- / -	SM7TZK	-10 / -	6	Partial capture
09-04 04:53	40m	- / -	DL6UCK	-19 / -	3	Partial capture
09-04 04:53	40m	- / -	F1IQH	-15 / -	2	Partial capture
09-04 04:53	40m	-5 / -	VE3OP	- / -	11	Partial capture
09-04 03:50	40m	-3 / -	VE3BR	- / -	11	Partial capture
09-04 03:04	40m	+13 / -4	UB8CPH	+4 / -16	6	✓ Full exchange observed
09-04 03:03	40m	+3 / +5	FM5GB	-10 / -18	5	✓ Full exchange observed
09-04 02:52	40m	+1 / +1	RX9WN	-14 / -15	6	✓ Full exchange observed
09-04 02:52	40m	- / +5	W6NWS	+4 / -	2	Partial capture
09-04 02:30	40m	-6 / -8	KK7UXY	-11 / -	4	✓ Closing observed
09-04 02:17	40m	0 / -	TA3NK	- / -	5	Partial capture
09-04 02:13	40m	-8 / -	TA3NK	- / -	2	Partial capture
09-04 02:03	40m	- / -	WB2AA	-16 / -	6	Partial capture
09-04 02:02	40m	- / -4	UB4CJS	-17 / -	2	Partial capture
09-04 01:17	40m	-6 / -	TA3NK	- / -	8	Partial capture
09-04 01:15	40m	-12 / -	VO2NS	-8 / -17	4	✓ Full exchange observed
09-04 01:06	40m	- / -16	F1PBZ	-5 / -	3	Partial capture
09-04 00:41	40m	-3 / -	VE3QO	- / -	7	Partial capture
09-04 00:38	40m	-2 / -	VE3QO	- / -	2	Partial capture
09-04 00:36	40m	0 / -	HI3T	- / -	2	Partial capture
09-04 00:34	40m	-8 / -	YV5AEZ	- / -16	4	✓ Closing fragment
09-04 00:09	40m	+12 / -	HI8ML	- / -14	3	✓ Closing fragment
09-04 00:09	40m	- / -5	ON1DGN	-8 / -	2	Partial capture
09-03 23:57	40m	-4 / -9	EX7CQ	-2 / -18	3	Partial capture
09-03 23:49	40m	-3 / -	BG0FQU	- / -21	2	Partial capture
09-03 23:47	40m	+1 / -	RW9ULK	- / -20	3	✓ Closing fragment
09-03 23:40	40m	- / -	DL1UDO	0 / -	3	Partial capture
09-03 23:30	40m	- / -15	F1PBZ	+5 / -	3	Partial capture
09-03 23:30	40m	- / -	PI4TX	-4 / -	4	Partial capture
09-03 23:17	40m	-2 / -	BG0FQU	- / -	12	Partial capture
09-03 23:15	40m	+3 / -	PV8AJ	- / -	2	✓ Closing fragment
09-03 23:14	40m	- / -	ON4MAP	-6 / -	4	Partial capture
09-01 05:56	40m	-5 / -	PV8AJ	- / -	8	Partial capture
09-01 05:51	40m	-10 / -	VK3SC	- / -	10	Partial capture
09-01 04:21	40m	- / -	DL3MIB	+11 / -	3	Partial capture
09-01 03:39	40m	-5 / -	CO6HZ	- / -19	8	✓ Closing fragment
09-01 03:38	40m	+8 / +4	F5OYA/P	-14 / -12	3	Partial capture
09-01 03:31	40m	-3 / -	PV8AJ	- / -	13	Partial capture
09-01 03:30	40m	- / -16	F1PBZ	0 / -	3	Partial capture
09-01 03:05	40m	-1 / -13	4L1FL	-9 / -22	8	✓ Full exchange observed
09-01 03:02	40m	-4 / -	RC9WC	- / -	3	✓ Closing fragment
09-01 03:01	40m	-5 / -7	EK1KE	-14 / -18	5	✓ Full exchange observed
09-01 02:58	40m	+2 / -3	VA2VT	-12 / -15	6	✓ Full exchange observed
09-01 02:51	40m	-4 / -7	PT7YV	0 / -6	9	✓ Full exchange observed

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
054900  -8 1483  HK3YL F4JZW JN08 (x2)
055830 -11 1588  CQ F4JZW JN08
055845  -4 2639  F4JZW F1PBZ -07
055915 -16 1587  F4JZW F4AWT JN24
055915  -7 2639  F4JZW F1PBZ -07 (x2)
220330 -13 1148  CQ F4JZW JN08
220345 -17 1319  F4JZW UN7PPV -17
220345  -9 1149  F4JZW DL1EDR JO41
220415 -14 1319  F4JZW UN7PPV -17
220415  -2 1149  F4JZW DL6AZ JO42
220445 -18 1318  F4JZW UN7PPV -17 (x2)
220515  +4 1148  F4JZW DL6AZ JO42

20m

UTC    dB Audio  Message
202845  -1 1668  <...> F4JZW JN08 (x8)
203315 -16 1668  K8SJM F4JZW JN08 (x3)
203445  -8 1668  KW9U F4JZW JN08 (x3)
203615 -16 1668  KF8FXK F4JZW JN08

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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