5B4AMX — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Cyprus Most frequent locator attributed to this token: KM65

Receiver-side FT8 activity involving 5B4AMX, decoded by SO8OO in southeastern Poland. 1,902 FT8 messages attributed to this token as transmitter, on 160m, 80m, 60m, 20m, 10m, across 8 UTC dates in the available aggregate history. Observed between 2026-06-10 and 2026-08-29.

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 1,902 FT8 messages attributed to 5B4AMX as the transmitting token by decoded message structure across 8 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (89%), followed by 10 m (8%) and 60 m (1%). Most decodes (63%) fell within the six-hour window 03:00-09:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -10.6 dB.

Overview

1,902

Messages attributed

UTC dates decoded

109

Active 15-min windows

-10.6 dB

Estimated median S/N

Bands

160m · 4 80m · 19 60m · 23 20m · 1,696 10m · 160

First attributed message: 2026-06-10
Last attributed message: 2026-08-29 23:06 UTC

Observed FT8 message patterns

Attributed sample: 1,902 messages
Active dates: 8 UTC dates
Estimated median S/N: -10.6 dB
Estimated 10th-90th percentile: -19.1 to +7 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 479, moderate (-15 to -9 dB) 604, strong (≥ -8 dB) 819.

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 5B4AMX in decoded directed-looking exchanges:

KA5SWC · United States ×2 DF9NV · Fed. Rep. of Germany ×2 IW5ALZ · Italy ×2 F1PBZ · France ×2 DL5KMR · Fed. Rep. of Germany ×2 KA8HUZ · United States ×2 N7LL · United States ×2 GI4OGS · Northern Ireland ×2 K7QA · United States ×2 EA3EDU · Spain ×2 F4LHR/P · France ×2 EA3JHH · Spain ×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 5B4AMX

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: KM65 · 507 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,844 km (approx.)
Last such locator decoded: 2026-08-29 23:05 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	5B4AMX S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-02 10:29	10m	- / -14	IU1VXD	-7 / -	2	Partial capture
08-29 23:04	160m	+7 / -	RI1FJL	- / -22	4	Partial capture
08-26 19:54	80m	- / -	LY1DY	+13 / -	4	Partial capture
08-26 19:42	80m	-10 / +3	RI1FJL	-12 / -16	20	Partial capture
08-24 08:18	20m	- / -4	DK5EI	-13 / -	8	Partial capture
08-24 08:14	20m	+4 / -	DK5EI	-18 / -15	3	Partial capture
08-24 08:08	20m	-3 / -6	M9KJY	-2 / 0	9	✓ Full exchange observed
08-24 08:07	20m	- / -	IW5ALZ	-6 / -	3	Partial capture
08-24 08:05	20m	+1 / -13	DL7VBH	+2 / 0	3	✓ Full exchange observed
08-24 08:03	20m	-4 / -	PA2PWM	- / -25	2	Partial capture
08-24 08:01	20m	-5 / -3	LZ1DQQ	-5 / +7	5	✓ Full exchange observed
08-24 07:50	20m	-1 / -	DG3AWN	-10 / -7	2	Partial capture
08-24 07:48	20m	+2 / -	EA5IXH	-20 / 0	3	✓ Closing observed
08-24 07:47	20m	+4 / -	M0PFX	- / -	2	✓ Closing fragment
08-24 07:46	20m	+4 / -	EA7LEE	- / -21	2	Partial capture
08-24 07:45	20m	-2 / -7	DH2RL	+5 / +3	5	✓ Full exchange observed
08-24 07:44	20m	0 / -	M0PFX	- / -8	2	Partial capture
08-24 07:40	20m	+2 / -13	M7CPT	-5 / -25	4	✓ Full exchange observed
08-24 07:34	20m	+2 / -	IU8WQA	-10 / +2	4	✓ Closing observed
08-24 07:33	20m	+2 / -12	M7SUZ	0 / -10	6	✓ Full exchange observed
08-24 07:26	20m	+2 / -	VK5RJ	- / -13	3	Partial capture
08-24 07:25	20m	- / -	DL6RS	-7 / -	16	Partial capture
08-24 07:24	20m	- / -	IW5ALZ	-2 / -	4	Partial capture
08-24 07:21	20m	-2 / -	AB1HL	- / -25	2	Partial capture
08-24 07:19	20m	+3 / -	W1FEA	- / -8	2	✓ Closing fragment
08-24 07:17	20m	+2 / +10	DL8DCM	+5 / +1	3	✓ Full exchange observed
08-24 07:15	20m	-1 / -	G5MJF	- / -18	3	Partial capture
08-24 07:11	20m	-2 / -	GI4OGS	- / 0	3	✓ Closing fragment
08-24 07:10	20m	0 / -	SP9KH	- / -1	2	✓ Closing fragment
08-24 07:08	20m	+3 / -	SP7SQP	- / -	2	✓ Closing fragment
08-24 07:06	20m	+2 / -	SV1MOZ	-8 / -5	4	Partial capture
08-24 07:05	20m	+4 / -	SP7SQP	- / -4	2	Partial capture
08-24 07:02	20m	+4 / -5	M9VVE	-16 / -5	6	✓ Full exchange observed
08-24 06:59	20m	- / -	IW5ALZ	-5 / -	4	Partial capture
08-24 06:56	20m	+5 / -	G4FCD	- / -9	2	✓ Closing fragment
08-24 06:53	20m	-7 / -	G5MJF	- / -19	2	Partial capture
08-24 06:52	20m	-4 / -	I5UOA	-14 / -1	2	Partial capture
08-24 06:49	20m	0 / -	US3LX	-9 / -2	3	✓ Closing observed
08-24 06:48	20m	-4 / -	SQ8JIO	- / +5	2	Partial capture
08-24 06:47	20m	-6 / -11	CT2HEX	-9 / -3	4	✓ Full exchange observed
08-24 06:46	20m	+2 / -	XE1NK	- / -19	2	Partial capture
08-24 06:45	20m	-2 / -	VK1KAZ	- / -9	2	✓ Closing fragment
08-24 06:43	20m	-2 / +2	Z35T	+16 / -	4	✓ Full exchange observed
08-24 06:42	20m	- / -	IW5ALZ	-6 / -	4	Partial capture
08-24 06:42	20m	-5 / -9	VK2AAI	-23 / -6	3	✓ Full exchange observed
08-24 06:37	20m	0 / -	EA4ITG	- / -25	2	Partial capture
08-24 06:35	20m	0 / -	DK8EW	- / -5	2	✓ Closing fragment
08-24 06:33	20m	-4 / -	DC9GT	- / -8	2	✓ Closing fragment
08-24 06:33	20m	-5 / -	F4LML	-8 / -13	9	✓ Full exchange observed
08-24 06:31	20m	-14 / -	HB9EXE	-4 / -8	6	✓ Closing observed

Recent FT8 messages decoded at SO8OO

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

10m

UTC    dB Audio  Message
121400 -23 1901  CQ DX 5B4AMX KM65
121430 -17 1901  I4BUQ 5B4AMX +00 (x2)
121700 -16 1901  DF9NV 5B4AMX +00 (x2)
121800 -15 1901  CQ DX 5B4AMX KM65
121900 -19 1901  SQ5BPT 5B4AMX +18
122100 -19 1901  CQ DX 5B4AMX KM65 (x6)
102945 -11  761  5B4AMX IU1VXD -14 (x2)

160m

UTC    dB Audio  Message
230445  +7  291  RI1FJL 5B4AMX KM65 (x4)

80m

UTC    dB Audio  Message
195330 -12 1301  5B4AMX DO3LZ -14
195330 -16 1764  5B4AMX JR3REX -07
195345 -13  368  RI1FJL 5B4AMX KM65
195400 +10 1946  5B4AMX LY1DY KO14 (x2)
195515  -8  368  RI1FJL 5B4AMX KM65
195530 +13 1946  5B4AMX LY1DY KO14 (x2)
195615 -12  368  RI1FJL 5B4AMX KM65 (x7)

20m

UTC    dB Audio  Message
081045  -8  912  5B4AMX M9KJY 73
081245  -8 2473  5B4AMX IW5ALZ JN53
081415 -18 1076  5B4AMX DK5EI JO42 (x2)
081600  +4  911  DK5EI 5B4AMX -15
081700  -5  911  CQ DX 5B4AMX KM65
081815 -14 1089  5B4AMX DK5EI R-04 (x5)
082045  -8 1169  5B4AMX R6FMF -14
082045 -10 1115  5B4AMX DK5EI R-04 (x3)

40m

UTC    dB Audio  Message
085745 -19 1750  5B4AMX YO6QDY KN26 (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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