5B4VL — FT8 activity observed at SO8OO

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

Receiver-side FT8 activity involving 5B4VL, decoded by SO8OO in southeastern Poland. 785 FT8 messages attributed to this token as transmitter, on 160m, 80m, 60m, 40m, 20m, across 25 UTC dates in the available aggregate history. Observed between 2026-07-23 and 2026-09-28.

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 785 FT8 messages attributed to 5B4VL as the transmitting token by decoded message structure across 25 UTC dates in the available aggregate history. The largest monitored-band total was 60 m (61%), followed by 160 m (18%) and 20 m (15%). Several six-hour UTC windows tied for the largest share (89%), so no unique busiest interval is claimed. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (80%); the estimated median was 0 dB.

Overview

785

Messages attributed

UTC dates decoded

Active 15-min windows

0 dB

Estimated median S/N

Bands

160m · 144 80m · 45 60m · 475 40m · 3 20m · 118

First attributed message: 2026-07-23
Last attributed message: 2026-09-28 01:51 UTC

Observed FT8 message patterns

Attributed sample: 785 messages
Active dates: 25 UTC dates
Estimated median S/N: 0 dB
Estimated 10th-90th percentile: -12 to +7 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 29, moderate (-15 to -9 dB) 128, strong (≥ -8 dB) 628.

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 5B4VL in decoded directed-looking exchanges:

W1NG · United States ×3 WB2SIH · United States ×3 OM2WQ · Slovak Republic ×2 AC2PB · United States ×2 K1QD · United States ×2 K1WAT · United States ×2 K4SOO · United States ×2 KD3CLB · United States ×2 N3FMC · United States ×2 N9UA · United States ×2 W1BS · United States ×2 CT2GQA · Portugal

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 5B4VL

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 · 295 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,944 km (approx.)
Last such locator decoded: 2026-09-28 01:49 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	5B4VL S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-28 01:50	60m	+5 / -	WA0TPN	- / -18	3	Partial capture
09-28 01:48	60m	+4 / -	K1QD	- / -16	2	✓ Closing fragment
09-28 01:45	60m	+3 / -	VA3DIF	-21 / 0	5	✓ Closing observed
09-28 01:42	60m	+4 / -	N9UA	- / -11	2	✓ Closing fragment
09-28 01:40	60m	- / -	DK2MAX	+6 / -	3	Partial capture
09-28 01:37	60m	- / -	G6PWS	-5 / -	9	Partial capture
09-28 01:34	60m	+4 / -	K5XI	- / -22	4	✓ Closing fragment
09-28 01:32	60m	- / -	IU1VJP	-15 / -	12	Partial capture
09-28 01:32	60m	+2 / -	N1JDO	- / -14	2	Partial capture
09-28 01:30	60m	+4 / -5	K1CF	-16 / -6	5	✓ Full exchange observed
09-28 01:30	60m	+1 / -	K3VAT	- / -10	2	✓ Closing fragment
09-28 01:30	60m	- / -	DL9KM	-24 / -	2	Partial capture
09-28 01:27	60m	+3 / -	AA3LX	- / -18	3	✓ Closing fragment
09-28 01:25	60m	+7 / -	WB2SIH	- / -13	3	✓ Closing fragment
09-28 01:24	60m	- / -	G6PWS	-6 / -	9	Partial capture
09-28 01:23	60m	- / -	F1IQH	0 / -	4	Partial capture
09-28 01:05	160m	- / -14	IW4AOT	+7 / -	3	Partial capture
09-23 17:44	80m	- / -	OK1YQ	+14 / -	4	Partial capture
09-23 17:43	80m	- / -	RA4ABH	-15 / -	2	Partial capture
09-23 17:43	80m	- / -	SM7IYM	-13 / -	2	Partial capture
09-23 17:43	80m	- / -	SM3ULU	-18 / -	2	Partial capture
09-23 17:41	80m	-6 / -	RI1FJZ	- / -17	4	✓ Closing fragment
09-20 02:05	60m	+11 / -	VE3XN	- / +3	3	Partial capture
09-20 02:03	60m	+12 / -	VE2CKW	- / -10	3	✓ Closing fragment
09-20 02:02	60m	+6 / -16	J48S	0 / -12	4	✓ Full exchange observed
09-20 01:57	60m	- / -	DL9KM	-21 / -	4	Partial capture
09-20 01:56	60m	+6 / -	NP3MR	- / -5	2	✓ Closing fragment
09-20 01:54	60m	+5 / -	WX8W	- / -13	2	Partial capture
09-20 01:53	60m	+3 / -	AC2PB	- / -6	2	✓ Closing fragment
09-20 01:52	60m	+4 / -	J88IH	- / -10	2	Partial capture
09-20 01:50	60m	+3 / -	VE3XN	- / +1	3	✓ Closing fragment
09-20 01:48	60m	- / -	LA9JKA	-14 / -	14	Partial capture
09-20 01:48	60m	- / -7	MM0HVU	-10 / -	2	Partial capture
09-20 01:47	60m	+4 / -	W1NG	- / -15	2	✓ Closing fragment
09-20 01:45	60m	-1 / -	VE2CKW	- / -12	2	Partial capture
09-20 01:44	60m	- / -	DL7UKM	0 / -	2	Partial capture
09-20 01:44	60m	- / -	G1SID	-7 / -	5	Partial capture
09-20 01:43	60m	- / 0	F1PBZ	+6 / -	2	Partial capture
09-20 01:40	60m	0 / -	J48S	- / -12	4	Partial capture
09-16 03:29	60m	- / -	IV3DSG	-6 / -	4	Partial capture
09-16 03:28	60m	+5 / -	VE3NKS	- / -20	2	Partial capture
09-16 03:26	60m	- / -	DL1RB	-2 / -	3	Partial capture
09-16 03:26	60m	- / -	ON4BHQ	-8 / -	2	Partial capture
09-15 03:04	160m	-3 / -	AA1K	- / -10	2	Partial capture
09-15 03:01	160m	-4 / -7	F4GGS	-13 / -12	6	✓ Full exchange observed
09-15 03:00	160m	-1 / -	CX6VM	- / -10	3	Partial capture
09-15 02:58	160m	+1 / -	AA1K	- / -7	5	Partial capture
09-13 03:05	60m	+3 / -	W5CCP	- / -14	6	Partial capture
09-13 03:04	60m	+2 / -	VE2JCW	- / 0	3	✓ Closing fragment
09-13 03:03	60m	- / -	IK4CBO	-5 / -	3	Partial capture

Recent FT8 messages decoded at SO8OO

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

60m

UTC    dB Audio  Message
014400  +4  947  CQ DX 5B4VL KM64 (x2)
014545  +4  947  VA3DIF 5B4VL +00 (x4)
014730 -21 1782  5B4VL VA3DIF 73
014745  +2  947  CQ DX 5B4VL KM64 (x2)
014845  +4  947  K1QD 5B4VL -16 (x2)
014945  +6  947  CQ DX 5B4VL KM64
015015  +6  947  WA0TPN 5B4VL -18 (x3)

160m

UTC    dB Audio  Message
022645 -19  910  CQ DX 5B4VL KM64 (x8)
010515  +8 2196  5B4VL IW4AOT -14
010530  -2  910  CQ DX 5B4VL KM64
010545 +10 2196  5B4VL IW4AOT -14
010600  -4  909  CQ DX 5B4VL KM64
010615  +2 2196  5B4VL IW4AOT -14
010630  -4  910  CQ DX 5B4VL KM64 (x2)

80m

UTC    dB Audio  Message
183915  +4 1111  5B4VL DH8BAC JO33
174115  -4  916  RI1FJZ 5B4VL -17 (x4)
174300 -17  916  5B4VL SM3ULU JP81
174330 -13  735  5B4VL SM7IYM JO56
174330 -20  916  5B4VL SM3ULU JP81
174345 -14  915  5B4VL RA4ABH LO20
174400 -13  735  5B4VL SM7IYM JO56
174400 +14 1153  5B4VL OK1YQ JN79
174415 -16  915  5B4VL RA4ABH LO20
174430 +14 1153  5B4VL OK1YQ JN79 (x3)

40m

UTC    dB Audio  Message
032200 -19 1510  5B4VL EB1LA IN73
032230 -13 1252  5B4VL UA4FKT LO23
032230 -20 1510  5B4VL EB1LA IN73
183330  -6  952  CQ JA 5B4VL KM64
183345 -11 2338  5B4VL S51PV JN76 (x3)
183800  -1  952  YD7HAS 5B4VL RR73
184245  -2 2579  <5B4VL> RD9M/3
184245  -9 2647  5B4VL MI6YHI IO74
190215  -9 1484  5B4VL E75D RR73
190445  -8  951  5B4VL YT1DDL KN04
192845  -4  952  5B4VL MI6YHI IO74 (x3)

20m

UTC    dB Audio  Message
040645 -11  990  N2SQW 5B4VL RR73
040715 -10  990  VK2AAI 5B4VL RR73
040815  -8  990  CQ DX 5B4VL KM64 (x4)
041015 -14  990  N0KWA 5B4VL -17 (x2)
041115 -11  990  KF5VDX 5B4VL -19 (x2)
041245 -14  990  CQ DX 5B4VL KM64
041315 -16  990  NR4O 5B4VL -18 (x3)
041545 -14  990  <...> 5B4VL -22

10m

UTC    dB Audio  Message
184015  -9  490  5B4VL IK4LZH JN54 (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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