DL4VBU — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Fed. Rep. of Germany Most frequent locator attributed to this token: JN39

Receiver-side FT8 activity involving DL4VBU, decoded by SO8OO in southeastern Poland. 63 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, 10m, across 11 UTC dates in the available aggregate history. Observed between 2026-06-11 and 2026-09-17.

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 63 FT8 messages attributed to DL4VBU as the transmitting token by decoded message structure across 11 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (60%), followed by 80 m (32%) and 20 m (5%). Several six-hour UTC windows tied for the largest share (100%), so no unique busiest interval is claimed. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (62%); the estimated median was -5 dB.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-5 dB

Estimated median S/N

Bands

80m · 20 40m · 38 20m · 3 10m · 2

First attributed message: 2026-06-11
Last attributed message: 2026-09-17 18:00 UTC

Observed FT8 message patterns

Attributed sample: 63 messages
Active dates: 11 UTC dates
Estimated median S/N: -5 dB
Estimated 10th-90th percentile: -19 to +1 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 11, moderate (-15 to -9 dB) 13, strong (≥ -8 dB) 39.

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 DL4VBU in decoded directed-looking exchanges:

DL2FK · Fed. Rep. of Germany G3TKT · England SM7WVZ · Sweden DG1KFR · Fed. Rep. of Germany DL0NS · Fed. Rep. of Germany DL7UKM · Fed. Rep. of Germany DL9KM · Fed. Rep. of Germany EA1IQM · Spain F1IQH · France F4NPE · France F5SJC · France IU4DTV · Italy

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 DL4VBU

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: JN39 · 39 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,063 km (approx.)
Last such locator decoded: 2026-09-17 18:00 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	DL4VBU S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-13 19:43	80m	- / -4	DA6CGN	-18 / -	2	✓ Closing fragment
09-13 19:40	40m	+3 / -	F5SJC	-2 / -	2	✓ Closing observed
09-13 19:38	40m	0 / +2	MW7RHR	-1 / 0	5	✓ Full exchange observed
09-13 19:36	40m	0 / -	IZ5ILK	+8 / +9	5	✓ Full exchange observed
09-13 19:35	40m	+2 / -12	RA6OY	0 / -	4	✓ Closing observed
09-03 12:57	40m	- / +5	PE9JAN	-5 / -	3	✓ Closing fragment
09-03 12:55	40m	- / -10	DL7UKM	-4 / -	3	✓ Closing fragment
09-03 12:51	40m	- / -5	OK2JKO	-8 / -	3	✓ Closing fragment
09-03 12:50	40m	- / +1	DG1KFR	-14 / -	2	✓ Closing fragment
09-02 17:28	40m	-4 / -	F4NPE	- / +6	2	✓ Closing fragment
09-02 17:26	40m	-4 / -	OE1AVO	+9 / -	3	✓ Closing observed
09-02 17:21	40m	-8 / -	EA1IQM	- / -	3	Partial capture
08-20 18:16	80m	-20 / -11	DO2OLD	-8 / -	3	Partial capture
08-20 18:15	80m	-22 / +3	DO1ID	+10 / -	4	✓ Closing observed
08-20 18:05	40m	- / -18	R5AV	+2 / -	2	✓ Closing fragment
08-20 18:03	40m	-3 / +1	DL0NS	-12 / -8	5	✓ Full exchange observed
08-05 18:19	40m	- / +2	DL9KM	-19 / -	3	✓ Closing fragment
07-23 18:39	40m	- / -16	IU4DTV	-16 / -	2	✓ Closing fragment
07-22 18:35	80m	-16 / -	DL1UDO	+2 / -4	6	Partial capture
07-22 18:35	80m	-24 / +3	DL3TC	-8 / +1	6	✓ Full exchange observed
07-20 19:33	80m	-10 / -	DL1UDO	- / -4	5	Partial capture
07-20 19:30	80m	-8 / -24	UA4FKT	+8 / -12	5	✓ Full exchange observed
07-09 10:45	20m	- / -10	F5IXN	-13 / -	3	Partial capture
06-25 17:26	10m	- / +4	DL2FK	0 / -	2	✓ Closing fragment
06-25 17:22	10m	-10 / -	SM7WVZ	- / +2	2	✓ Closing fragment
06-25 17:21	10m	- / -6	G3TKT	-9 / -	3	✓ Closing fragment
06-24 17:51	20m	- / -	RM4N	+6 / -	3	Partial capture

Recent FT8 messages decoded at SO8OO

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

80m

UTC    dB Audio  Message
183700  +1 2893  DL4VBU DL1UDO JO31
183730  -5  802  DL4VBU DL3TC R+03
183730  -2 2893  DL4VBU DL1UDO JO31
183800 -12  802  DL4VBU DL3TC 73
181515 -21 1371  DO1ID DL4VBU JN39
181530 +10  381  DL4VBU DO1ID +03 (x2)
181615 -24 1372  DO1ID DL4VBU 73
181645 -20 1371  DO2OLD DL4VBU JN39
181700  -7 1553  DL4VBU DO2OLD -11 (x2)
181845 -23 1371  CQ DL4VBU JN39
194300 -18  907  DL4VBU DA6CGN -04 (x2)
180015 -16  611  CQ DL4VBU JN39

40m

UTC    dB Audio  Message
193715  +6 2859  DL4VBU IZ5ILK 73
193730  -3 2859  CQ DL4VBU JN39 (x3)
193845  -3 2859  DL4VBU MW7RHR IO73
193900  +3 2859  MW7RHR DL4VBU +00
193915  -2 2859  DL4VBU MW7RHR R+02
193930  -2 2859  MW7RHR DL4VBU RR73
193945  +2 2859  DL4VBU MW7RHR 73
194030  -6 2859  CQ DL4VBU JN39
194045  -2 2859  DL4VBU F5SJC JN05
194130  +3 2859  F5SJC DL4VBU RR73
194200  -4 2859  CQ DL4VBU JN39 (x2)
175330  +1  647  DL4VBU F1IQH 73

20m

UTC    dB Audio  Message
174915  -9 2735  CQ DL4VBU JN39 (x2)
175100  +6 2733  DL4VBU RM4N LO48 (x3)
175315  -4 2805  CQ DL4VBU JN39
104530 -10 1757  DL4VBU F5IXN JN23 (x3)

10m

UTC    dB Audio  Message
171430  +7 2855  DL4VBU LZ2VQ KN23
171930 +10 2854  DL4VBU M0BEW -17
172130  -9 2856  DL4VBU G3TKT R-06 (x3)
172245 -10 2854  SM7WVZ DL4VBU +02 (x2)
172600  -1  889  DL4VBU DL2FK +04 (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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