F4AMS — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: France Most frequent locator attributed to this token: IN97

Receiver-side FT8 activity involving F4AMS, decoded by SO8OO in southeastern Poland. 378 FT8 messages attributed to this token as transmitter, on 80m, 60m, 40m, 20m, 10m, across 35 UTC dates in the available aggregate history. Observed between 2026-06-07 and 2026-09-20.

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 378 FT8 messages attributed to F4AMS as the transmitting token by decoded message structure across 35 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (62%), followed by 80 m (18%) and 40 m (14%). Most decodes (63%) 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 -8.3 dB.

Overview

378

Messages attributed

UTC dates decoded

Active 15-min windows

-8.3 dB

Estimated median S/N

Bands

80m · 68 60m · 8 40m · 53 20m · 235 10m · 14

First attributed message: 2026-06-07
Last attributed message: 2026-09-20 00:11 UTC

Observed FT8 message patterns

Attributed sample: 378 messages
Active dates: 35 UTC dates
Estimated median S/N: -8.3 dB
Estimated 10th-90th percentile: -18 to +2 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 75, moderate (-15 to -9 dB) 113, strong (≥ -8 dB) 190.

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 F4AMS in decoded directed-looking exchanges:

D44TWO · Cape Verde ×2 DK8HC · Fed. Rep. of Germany ×2 OH0TS · Aland Islands BG7BMG · China BI1HJR · China IQ9BF · Sicily JN1ILK · Japan TI3CAT · Costa Rica VP5G · Turks & Caicos Islands EA2DR · Spain EG1PDA · Spain DO5HB · Fed. Rep. of Germany

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 F4AMS

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: IN97 · 313 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,687 km (approx.)
Last such locator decoded: 2026-09-20 00:10 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	F4AMS S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-20 00:08	80m	0 / -	R3ST	- / -13	6	✓ Closing fragment
09-10 21:38	80m	- / -24	Z62NS	+10 / -	2	✓ Closing fragment
09-09 21:07	80m	-10 / -	5Z4VJ	- / -	2	Partial capture
09-09 21:04	80m	-22 / -	5Z4VJ	- / -	2	Partial capture
09-08 21:03	80m	- / +10	ON4KDT	-18 / -	3	✓ Closing fragment
09-08 19:07	80m	- / -	DK7UY	+4 / -	2	Partial capture
09-08 19:07	80m	- / -	DD7EE	+13 / -	2	Partial capture
09-08 00:04	80m	+2 / -	7X5CY	- / -	2	Partial capture
09-08 00:01	80m	+2 / -	UX5UO	- / +4	2	✓ Closing fragment
09-08 00:01	80m	+4 / -	DO5HB	-14 / -	2	✓ Closing observed
09-07 23:56	80m	-12 / -	N7JB	- / -	2	Partial capture
09-07 23:54	80m	-10 / -	7X5CY	- / -	2	Partial capture
09-06 21:08	80m	-13 / -	5Z4VJ	- / -	4	Partial capture
09-06 21:03	80m	-10 / -	5Z4VJ	- / -	2	Partial capture
09-06 20:59	80m	-10 / -	5Z4VJ	- / -	2	Partial capture
09-05 23:17	80m	- / -18	RY3F	+8 / -	2	✓ Closing fragment
09-05 23:14	80m	-10 / -17	DO9BAU	+10 / -11	5	✓ Full exchange observed
09-05 23:13	80m	-5 / -	LA5LDX	- / -6	3	✓ Closing fragment
09-04 23:27	80m	-11 / -	RI1FJL	- / -	22	Partial capture
09-04 23:24	80m	-15 / 0	OK1HEH	+11 / -8	4	✓ Full exchange observed
09-04 23:22	80m	-14 / -13	UA4FKT	+4 / -4	5	✓ Full exchange observed
09-04 23:21	80m	-14 / -	RI1FJL	- / -5	3	✓ Closing fragment
09-04 23:01	60m	- / -	DL7ARV	+4 / -	2	Partial capture
09-04 22:57	60m	-12 / -	D44TWO	- / -4	8	✓ Closing fragment
09-03 21:28	40m	-10 / -6	DK8HC	-6 / -3	5	✓ Full exchange observed
09-03 21:27	40m	-9 / -	EG1PDA	- / -2	3	✓ Closing fragment
09-02 22:19	40m	-15 / -	D44TWO	- / -20	7	✓ Closing fragment
09-02 20:32	40m	-7 / -	RI1FJL	- / -20	3	Partial capture
09-02 20:28	40m	-9 / -	RI1FJL	- / -	2	Partial capture
08-29 23:02	40m	-12 / -	VY2SHL	- / -	3	Partial capture
08-29 22:53	40m	-8 / -	RI1FJL	- / -	6	Partial capture
08-29 22:48	40m	-8 / -	EA2DR	- / -7	3	✓ Closing fragment
08-28 09:37	20m	-2 / -	RI1FJL	- / -	3	Partial capture
08-27 22:37	20m	-15 / -	RI1FJL	- / -	13	Partial capture
08-27 22:29	20m	-11 / -	RI1FJL	- / -	4	Partial capture
08-27 20:42	20m	-2 / -	RI1FJL	- / -	6	Partial capture
08-27 20:22	20m	0 / -	RI1FJL	- / -	19	Partial capture
08-27 14:18	20m	-5 / -	RI1FJL	- / -	9	Partial capture
08-27 13:13	20m	+4 / -	RI1FJL	- / -	11	Partial capture
08-27 12:38	20m	-2 / -	RI1FJL	- / -	11	Partial capture
08-27 12:16	20m	-1 / -	RI1FJL	- / -	10	Partial capture
08-27 11:29	20m	0 / -	RI1FJL	- / -	19	Partial capture
08-27 11:08	20m	-11 / -	RI1FJL	- / -	11	Partial capture
08-26 14:09	20m	-2 / -	RI1FJL	- / -24	13	Partial capture
08-19 22:38	20m	- / -24	VE1WT	-3 / -	8	Partial capture
07-30 09:08	20m	-10 / -	VP5G	- / -15	6	✓ Closing fragment
07-28 22:52	20m	-18 / -	UP7Z	- / -	2	Partial capture
07-25 17:29	10m	-19 / -	OH0TS	- / -22	2	✓ Closing fragment
07-24 08:34	20m	-17 / -	<...>	- / -	6	Partial capture
07-07 22:22	20m	-15 / -	BG7BMG	- / -10	4	✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

80m

UTC    dB Audio  Message
210430 -20 1103  F4AMS ON4KDT 73
210400 -19 1854  5Z4VJ F4AMS IN97 (x4)
213800  +9 1354  F4AMS Z62NS -24 (x2)
220445  -7 1830  SN100PKP F4AMS IN97
220600  +3  744  F4AMS TK/4O7CC -18
000845  -3 1837  R3ST F4AMS IN97 (x6)

60m

UTC    dB Audio  Message
225730 -11 1691  D44TWO F4AMS IN97 (x8)
230115  +2 2736  F4AMS DL7ARV JO62 (x2)

40m

UTC    dB Audio  Message
221900 -15 1800  D44TWO F4AMS IN97 (x7)
212715  -8 1800  EG1PDA F4AMS IN97 (x3)
212845 -10 1800  DK8HC F4AMS -03
212900  -5  598  F4AMS DK8HC R-06
212915 -10 1800  DK8HC F4AMS -03 (x2)
213000  -6  597  F4AMS DK8HC 73

20m

UTC    dB Audio  Message
223815 -14 1789  RI1FJL F4AMS IN97 (x15)

10m

UTC    dB Audio  Message
170415  -7 2058  F4AMS IK4RVY -02 (x2)
194415 -18 1752  <...> F4AMS IN97 (x5)
194715 -18 1752  <HB0/OI5AY> F4AMS IN97 (x4)
194930  -9  719  F4AMS HB0/OI5AY +30
194945 -21 1753  HB0/OI5AY F4AMS R+06
172915 -19 1516  OH0TS F4AMS R-22 (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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