5B4AMX — reception at SO8OO

Signals decoded by SO8OO in southeastern Poland. FT8 and CW have separate histories; all times are UTC.

FT8 activity

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. 3,431 FT8 messages attributed to this token as transmitter, on 160m, 80m, 60m, 20m, 10m, across 17 UTC dates in the available aggregate history. Observed between 2026-06-10 and 2026-10-14.

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 3,431 FT8 messages attributed to 5B4AMX as the transmitting token by decoded message structure across 17 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (49%), followed by 80 m (33%) and 60 m (12%). Most decodes (54%) fell within the six-hour window 23:00-05:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -8 dB.

Overview

3,431

Messages attributed

UTC dates decoded

184

Active 15-min windows

-8 dB

Estimated median S/N

Bands

160m · 7 80m · 1,137 60m · 425 20m · 1,696 10m · 166

First attributed message: 2026-06-10
Last attributed message: 2026-10-14 14:50 UTC

Observed FT8 message patterns

Attributed sample: 3,431 messages
Active dates: 17 UTC dates
Estimated median S/N: -8 dB
Estimated 10th-90th percentile: -18 to +4.3 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 586, moderate (-15 to -9 dB) 1,037, strong (≥ -8 dB) 1,808.

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:

F1PBZ · France ×3 DL9KM · Fed. Rep. of Germany ×3 DF9NV · Fed. Rep. of Germany ×2 DL1UDO · Fed. Rep. of Germany ×2 DL5KMR · Fed. Rep. of Germany ×2 RI1FJZ · Franz Josef Land ×2 2E0FUM · England ×2 9A6OY · Croatia ×2 DH2RL · Fed. Rep. of Germany ×2 EA3EDU · Spain ×2 EA3JHH · Spain ×2 F4HSB · France ×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 · 1,456 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,844 km (approx.)
Last such locator decoded: 2026-10-14 00:09 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
10-14 14:49	10m	-9 / -	OE3LQA	- / -6	2	✓ Closing fragment
10-14 14:48	10m	-12 / -	DL0NS	- / -	2	✓ Closing fragment
10-14 00:06	80m	-4 / -	IZ0BVU	+14 / +1	4	✓ Closing observed
10-14 00:02	80m	- / -17	DO2NTC	-5 / -	4	Partial capture
10-13 23:59	80m	-5 / -	RA9MX	-10 / -11	3	✓ Closing observed
10-13 23:55	80m	-4 / -12	UC1C	-3 / -15	6	✓ Full exchange observed
10-13 23:53	80m	-10 / -2	OH5XH	+4 / -2	4	✓ Full exchange observed
10-13 23:51	80m	-4 / -1	LY1VR	+10 / -16	5	✓ Full exchange observed
10-13 23:46	80m	- / -	UC1C	-6 / -	2	Partial capture
10-13 23:44	80m	-4 / -3	R4HHN	+6 / 0	5	✓ Full exchange observed
10-13 23:42	80m	-4 / -7	HF50HSP	0 / -15	2	Partial capture
10-13 23:39	80m	-7 / -8	IZ1HJU	-15 / -13	7	✓ Full exchange observed
10-13 23:37	80m	-14 / +6	SQ9RIM	+15 / -1	5	✓ Full exchange observed
10-13 23:34	80m	-10 / -	A61DD	-22 / -9	6	✓ Closing observed
10-13 23:32	80m	-7 / -	UM9DXC/R	- / -24	2	Partial capture
10-13 23:20	80m	- / -16	DO2NTC	-6 / -	5	Partial capture
10-13 23:18	80m	-5 / -8	R2BPS	-5 / -18	7	✓ Full exchange observed
10-13 23:17	80m	-6 / +4	IK5CHL	+8 / 0	4	✓ Full exchange observed
10-13 23:15	80m	-2 / -5	DL2DT	+3 / -9	5	✓ Full exchange observed
10-13 23:12	80m	-1 / -13	EI2GLB	+12 / -	5	✓ Closing observed
10-13 23:11	80m	-5 / +4	UG4L	0 / 0	6	✓ Full exchange observed
10-13 23:10	80m	-6 / -7	PE7W	-10 / -20	6	✓ Full exchange observed
10-13 23:07	80m	-6 / +3	UR3LM	+10 / -	5	✓ Full exchange observed
10-13 23:04	80m	-8 / -1	R3PJV	+2 / 0	5	✓ Full exchange observed
10-13 23:00	80m	-6 / +4	OH3GBW	+4 / +1	5	✓ Full exchange observed
10-13 22:58	80m	-2 / -6	G0BAZ	-16 / -	5	✓ Closing observed
10-13 22:54	80m	-2 / -13	PE5TDM	+2 / -14	5	✓ Full exchange observed
10-13 22:48	80m	-7 / -	EA1R	-10 / -24	5	✓ Closing observed
10-13 22:48	80m	-4 / -9	OK1AYM	+9 / -8	5	✓ Full exchange observed
10-13 22:46	80m	-5 / -20	G0IUS	+1 / -19	6	✓ Full exchange observed
10-13 22:45	80m	-5 / -6	R4SCQ	-13 / -18	5	✓ Full exchange observed
10-13 22:43	80m	- / -	DO1LKG	-4 / -	3	Partial capture
10-13 22:42	80m	-8 / -	ON7VZ	-1 / -24	5	✓ Closing observed
10-13 22:40	80m	-7 / -	EA2EWL	-18 / -23	6	✓ Closing observed
10-13 22:38	80m	-10 / -13	DL4RBR	+7 / -12	7	✓ Full exchange observed
10-13 22:37	80m	-4 / -11	DO1LKG	-8 / -15	6	Partial capture
10-13 22:37	80m	-4 / -	F4ESO	0 / -18	4	Partial capture
10-13 22:35	80m	-8 / -2	R7KJM	-5 / 0	5	✓ Full exchange observed
10-13 22:34	160m	- / -	RT6Z	+9 / -	2	Partial capture
10-13 22:28	80m	- / -	DL/AD2LX	+4 / -	4	✓ Closing fragment
10-13 22:28	80m	-8 / -12	SQ3GM	+2 / -14	5	✓ Full exchange observed
10-13 22:25	80m	-4 / -	OE2AGZ	- / -21	2	Partial capture
10-13 22:23	80m	-8 / -	KP4AA	-18 / -19	4	✓ Closing observed
10-13 22:21	80m	-10 / -12	G4RUW	-8 / -23	5	✓ Full exchange observed
10-13 22:20	80m	-14 / 0	G0HVQ	+5 / -6	5	✓ Full exchange observed
10-13 22:17	80m	-10 / -10	F4NQU	-11 / -19	7	✓ Full exchange observed
10-13 22:15	80m	-9 / -12	DL2KZA	+10 / -13	6	✓ Full exchange observed
10-13 22:15	80m	-12 / -	KP4AA	- / -24	3	✓ Closing fragment
10-13 22:12	80m	-12 / 0	ON8WR	+8 / -15	5	✓ Full exchange observed
10-13 22:10	80m	- / -	DL2KZA	+6 / -	2	Partial capture

Recent FT8 messages decoded at SO8OO

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

10m

UTC    dB Audio  Message
132545 -16 1898  5B4AMX 7Z1IS -17 (x4)
123545  -9 2208  5B4AMX EA7AAF IM77 (x3)
125845  -7 2327  5B4AMX EA7Z IM67 (x2)
142500 -10 1477  5B4AMX CT7AUT IM67
154215 -19 1410  5B4AMX ON1JP -04
144830 -15 1917  DL0NS 5B4AMX RR73 (x2)
144930  -9 1918  OE3LQA 5B4AMX -06 (x2)

80m

UTC    dB Audio  Message
000345  -5 1656  5B4AMX DO2NTC -17
000400  -5 1656  CQ 5B4AMX KM65 (x6)
000645 +12 2534  5B4AMX IZ0BVU JN63
000700  -5 1656  IZ0BVU 5B4AMX +01 (x2)
000745 +17 2534  5B4AMX IZ0BVU 73
000800  -7 1656  CQ 5B4AMX KM65
000815 -18 2201  5B4AMX M0LOW IO90
000830  -3 1656  CQ 5B4AMX KM65 (x2)

160m

UTC    dB Audio  Message
230445  +7  291  RI1FJL 5B4AMX KM65 (x4)
205515  -4 1006  RI1FJZ 5B4AMX KM65 (x2)
205600 -16 1008  5B4AMX RI1FJZ RR73
205615  +9 1006  RI1FJZ 5B4AMX 73
205700  +0  736  5B4AMX RK6OQ KN87
205730  -6 1006  5B4AMX IU3RRX JN55
223415  +9 2859  5B4AMX RT6Z KN98 (x2)

60m

UTC    dB Audio  Message
012845 -11 1120  CQ 5B4AMX KM65 (x9)
013330  -2 1120  5B4AMX 4X5MZ KM71
013345  -7 1120  4X5MZ 5B4AMX +20
013400  -5 1120  5B4AMX 4X5MZ R+01
013415  -6 1120  4X5MZ 5B4AMX RR73
013430  -5 1120  5B4AMX 4X5MZ 73
013445  -6 1120  CQ 5B4AMX KM65

40m

UTC    dB Audio  Message
085745 -19 1750  5B4AMX YO6QDY KN26 (x3)
004500 -16 1482  5B4AMX CT7AUT IM67 (x2)

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)

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.

CW

No CW receptions recorded for this callsign in the last 30 days.

Explore CW reception at SO8OO

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