5B4AMM — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Cyprus Most frequent locator attributed to this token: KM64

Receiver-side FT8 activity involving 5B4AMM, decoded by SO8OO in southeastern Poland. 2,168 FT8 messages attributed to this token as transmitter, on 80m, 60m, 40m, 20m, 10m, across 20 UTC dates in the available aggregate history. Observed between 2026-06-06 and 2026-09-08.

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 2,168 FT8 messages attributed to 5B4AMM as the transmitting token by decoded message structure across 20 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (54%), followed by 20 m (38%) and 80 m (4%). Most decodes (50%) fell within the six-hour window 20:00-02:00 UTC. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (66%); the estimated median was -6 dB.

Overview

2,168

Messages attributed

UTC dates decoded

186

Active 15-min windows

-6 dB

Estimated median S/N

Bands

80m · 79 60m · 20 40m · 1,175 20m · 829 10m · 65

First attributed message: 2026-06-06
Last attributed message: 2026-09-08 21:52 UTC

Observed FT8 message patterns

Attributed sample: 2,168 messages
Active dates: 20 UTC dates
Estimated median S/N: -6 dB
Estimated 10th-90th percentile: -16 to +12 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 236, moderate (-15 to -9 dB) 499, strong (≥ -8 dB) 1,433.

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 5B4AMM in decoded directed-looking exchanges:

IQ9BF · Sicily ×5 IQ7KM · Italy ×4 IQ3UCY · Italy ×4 IQ1BK · Italy ×3 IQ0VT · Italy ×3 IQ4FE · Italy ×3 IQ4FJ · Italy ×3 IQ9BH · Sicily ×2 F1PBZ · France ×2 IQ4LH · Italy ×2 IQ9NI · Sicily ×2 N1WI · United States ×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 5B4AMM

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: KM64 · 601 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,944 km (approx.)
Last such locator decoded: 2026-09-08 21:50 UTC

Other locator fields attributed to this token: KM65 (570).

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	5B4AMM S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-08 21:49	40m	-7 / -	SP2DTW	- / -10	2	✓ Closing fragment
09-08 21:47	40m	- / -	M7DFM	-5 / -	2	Partial capture
09-08 21:46	40m	-5 / -	DF2TG	- / -2	2	✓ Closing fragment
09-08 21:45	40m	-8 / -	DC9GT	- / -20	2	✓ Closing fragment
09-08 21:45	40m	-6 / -18	G3PMY	-2 / -20	10	✓ Full exchange observed
09-08 21:43	40m	-8 / -	JT1DN	- / -22	2	Partial capture
09-08 21:40	40m	-9 / -11	OK1MDX	+1 / -16	9	✓ Full exchange observed
09-08 21:37	40m	-6 / -	EA4IXE	-16 / -16	4	✓ Closing observed
09-08 21:35	40m	+2 / -	OH6QU	- / +5	2	✓ Closing fragment
09-08 21:34	40m	-2 / -	DD1MAT	- / -9	2	✓ Closing fragment
09-08 21:33	40m	-2 / -	F5SJC	-6 / -14	3	✓ Closing observed
09-08 21:31	40m	-1 / -	SP3TD	- / -23	3	Partial capture
09-08 21:28	40m	+6 / -	JJ7QQI	- / -20	2	✓ Closing fragment
09-08 21:26	40m	-8 / -	PA3JB/P	- / -16	2	Partial capture
09-08 21:24	40m	+5 / -	EA1KCN	-2 / -18	4	✓ Closing observed
09-08 21:24	40m	-9 / -	G1ROK	+3 / -23	3	Partial capture
09-08 21:22	40m	-12 / -	PE1JLZ	- / -12	2	✓ Closing fragment
09-08 21:21	40m	- / -	M0ENG	-11 / -	4	Partial capture
09-08 21:20	40m	-12 / -	UT2PC	- / -8	2	✓ Closing fragment
09-08 21:19	40m	-14 / -	JG2CNZ	- / -15	2	✓ Closing fragment
09-08 21:17	40m	-12 / -	IU1WYC	- / -12	2	✓ Closing fragment
09-08 21:14	40m	-8 / -12	IU2UDS	-3 / -16	5	✓ Full exchange observed
09-08 21:09	40m	- / -	G3RKF	0 / -	2	Partial capture
09-08 21:09	40m	-4 / -	DS2MGT	- / -18	2	✓ Closing fragment
09-08 21:06	40m	-4 / -	JA4IQK	- / -15	4	✓ Closing fragment
09-08 21:04	40m	-4 / -	SP4AAZ	- / -4	2	✓ Closing fragment
09-08 21:02	40m	-12 / -	DS2MGT	- / -19	2	Partial capture
09-08 21:00	40m	-11 / -15	G6LEE	-2 / -9	4	✓ Full exchange observed
09-08 20:58	40m	-7 / -	JH2AKB	- / -8	2	✓ Closing fragment
09-08 20:57	40m	-5 / -	SQ3TR	- / -8	2	Partial capture
09-08 20:54	40m	-8 / -	JI1EIX	- / -3	2	✓ Closing fragment
09-08 20:53	40m	-6 / -	DS3AEL	- / -22	5	✓ Closing fragment
09-08 20:51	40m	-9 / -	DB1BW	- / 0	2	✓ Closing fragment
09-08 20:50	40m	-11 / -	JF4TCC	- / -21	2	✓ Closing fragment
09-08 20:48	40m	-10 / -	PD0ZAP	-7 / -23	5	✓ Closing observed
09-08 20:48	40m	- / -	R4RZ	-1 / -	5	Partial capture
09-08 20:47	40m	-12 / -	JA5DNJ	- / -20	2	✓ Closing fragment
09-08 20:43	40m	-12 / -15	IZ1HJU	-8 / -14	4	Partial capture
09-08 20:42	40m	-12 / -	JR7AQL	- / -12	2	✓ Closing fragment
09-08 20:37	40m	-12 / -17	PA3BBV	-4 / -15	5	✓ Full exchange observed
09-08 20:37	40m	- / -	R4RZ	-2 / -	4	Partial capture
08-29 19:26	20m	- / -	IU3WOH	0 / -	2	Partial capture
08-27 21:23	80m	+7 / -	RI1FJL	- / -16	12	Partial capture
08-23 21:39	20m	- / -	JR6UEE	-12 / -	2	Partial capture
08-23 21:32	20m	- / -4	JF2KOZ	-9 / -	2	✓ Closing fragment
08-21 05:32	20m	- / -	IW5ALZ	-4 / -	2	Partial capture
08-21 05:23	20m	- / -1	RN6MA	+2 / -	4	Partial capture
08-21 05:18	20m	- / -	IW5ALZ	-10 / -	3	Partial capture
08-21 05:16	20m	- / -	DH2RL	-12 / -	3	Partial capture
08-21 05:06	20m	- / -	DL1R	+8 / -	2	Partial capture

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
214745  -5 2533  5B4AMM M7DFM IO91
214800  -8 2361  CQ 5B4AMM KM64
214815  -5 2533  5B4AMM M7DFM IO91
214815  +2 2361  5B4AMM G3PMY -18
214830  -5 2361  CQ 5B4AMM KM64
214845  +3 2361  5B4AMM G3PMY -18
214900  -9 2362  CQ 5B4AMM KM64
214930  -5 2362  SP2DTW 5B4AMM R-10 (x2)
215030  -4 2362  CQ 5B4AMM KM64
215045  +0 2361  5B4AMM G3PMY -18
215100  -6 2362  G3PMY 5B4AMM R-20
215115  -7 2361  5B4AMM G3PMY RR73
215130  -7 2362  G3PMY 5B4AMM RR73
215200  -8 2362  IT9CMZ 5B4AMM R-14

160m

UTC    dB Audio  Message
205915 -18 2331  5B4AMM SM4AZQ JO69

20m

UTC    dB Audio  Message
052345  -2  926  5B4AMM RN6MA -01 (x3)
052615 -11 3042  5B4AMM IW5ALZ JN53 (x3)
213245  -9  225  5B4AMM JF2KOZ R-04 (x2)
213415 -12 1078  5B4AMM BH4ECL R+00
213945 -11  945  5B4AMM JR6UEE PL36 (x2)
214815 -21 1986  5B4AMM JN4MIV PM74
192645  +2 2810  5B4AMM IU3WOH JN65 (x3)

80m

UTC    dB Audio  Message
194045 +11  879  5B4AMM SP5GW KO02 (x3)
212345  +0 2210  RI1FJL 5B4AMM KM65 (x12)

10m

UTC    dB Audio  Message
163800 -21 1192  CS7AVD 5B4AMM RR73
163915 -11 1190  5B4AMM PA3GMD JO21 (x4)
164815 -20 2196  5B4AMM UA6CEY KN95
170045  -8  466  5B4AMM ON4KVI JO20 (x7)
172415 -20 1193  5B4AMM PD1WMD JO21
181430 -19 1192  IV3LDF 5B4AMM +01

60m

UTC    dB Audio  Message
191230  -1  734  5B4AMM IQ4FJ -15 (x2)
191445 -14  732  IQ4FJ 5B4AMM 73
191500 -12  891  5B4AMM 4Z5KU KM71 (x2)
215045  -8  575  5B4AMM MM0GOR -17 (x7)
222215 -14 1606  II1NAP 5B4AMM KM64 (x3)

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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