DL4QB — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Fed. Rep. of Germany Most frequent locator attributed to this token: JO31

Receiver-side FT8 activity involving DL4QB, decoded by SO8OO in southeastern Poland. 588 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, 10m, across 15 UTC dates in the available aggregate history. Observed between 2026-06-09 and 2026-07-14.

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 588 FT8 messages attributed to DL4QB as the transmitting token by decoded message structure across 15 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (60%), followed by 10 m (26%) and 40 m (12%). Most decodes (52%) fell within the six-hour window 06:00-12:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -12 dB.

Overview

588

Messages attributed

UTC dates decoded

Active 15-min windows

-12 dB

Estimated median S/N

Bands

80m · 10 40m · 73 20m · 354 10m · 151

First attributed message: 2026-06-09
Last attributed message: 2026-07-14 08:44 UTC

Observed FT8 message patterns

Attributed sample: 588 messages
Active dates: 15 UTC dates
Estimated median S/N: -12 dB
Estimated 10th-90th percentile: -21 to -1 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 199, moderate (-15 to -9 dB) 192, strong (≥ -8 dB) 197.

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 DL4QB in decoded directed-looking exchanges:

M0BEW · England ×2 OE8PGR · Austria ×2 YO9PH · Romania ×2 M0PAW · England ×2 9A2KS · Croatia A61DI · United Arab Emirates DL9KM · Fed. Rep. of Germany DO5HJK · Fed. Rep. of Germany EA3HLM · Spain F5SJC · France HF5A · Poland HG8LXL · Hungary

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 DL4QB

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: JO31 · 309 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,054 km (approx.)
Last such locator decoded: 2026-07-14 08:43 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	DL4QB S/N	Counterpart	Counterpart S/N	Msgs	Capture
08-28 09:26	20m	- / -	LA1SNA	-14 / -	2	✓ Closing fragment
08-28 08:53	20m	- / -26	F5LMJ	-20 / -	3	✓ Closing fragment
07-17 19:33	20m	- / -16	EA3CY	-20 / -	3	✓ Closing fragment
07-14 08:43	20m	-16 / -	HB9GUX	-13 / +3	3	Partial capture
07-14 08:39	20m	-18 / -	M0PAW	- / -	3	✓ Closing fragment
07-14 08:31	20m	- / -	PE1NPS	-12 / -	2	Partial capture
07-14 08:05	20m	-20 / -	DG6TOM	- / -9	3	Partial capture
07-14 08:03	20m	-22 / -3	E75W	-12 / -15	2	Partial capture
07-14 08:02	20m	- / -	LZ4VR	-21 / -	2	Partial capture
07-14 08:02	20m	-15 / -24	PD1ADA	-20 / -19	3	✓ Full exchange observed
07-14 07:53	20m	-10 / -	EA3ACQ	- / -18	2	✓ Closing fragment
07-14 07:50	20m	-12 / -19	PD1ADA	-16 / -19	7	Partial capture
07-14 07:43	20m	-17 / -	MM7CEH	- / -15	2	✓ Closing fragment
07-14 07:40	20m	-16 / -	HK4EIC	- / -13	2	✓ Closing fragment
07-14 07:28	20m	-19 / -	M7MUW	- / -15	2	✓ Closing fragment
07-14 07:24	20m	-20 / -1	IK4LZH	-4 / -4	3	Partial capture
07-14 06:58	20m	- / -	PA0LDE	-11 / -	4	Partial capture
07-14 06:54	20m	- / -	F4LNM	-14 / -	3	Partial capture
07-14 06:52	20m	-19 / -	DL6UM	- / -23	3	Partial capture
07-14 06:47	20m	-19 / -	CT7AUT	- / -6	2	✓ Closing fragment
07-14 06:31	20m	-16 / -	KH6EU	- / -20	2	Partial capture
07-14 06:28	20m	-20 / -	LY1SR	- / -17	3	Partial capture
07-14 06:20	20m	-23 / -	VK6ABC	- / -9	2	Partial capture
07-14 06:19	20m	- / -12	LZ3CB	+6 / -	2	Partial capture
07-14 06:13	20m	-22 / -15	YO9PH	-14 / -	3	✓ Closing observed
07-14 06:04	20m	-14 / -	RW6HP	- / -20	2	Partial capture
07-13 07:37	20m	- / -	LZ3CB	+8 / -	4	Partial capture
07-10 18:52	10m	-7 / -	<...>	- / -	2	Partial capture
07-07 11:37	10m	- / -17	F4FSY	-13 / -	3	Partial capture
07-07 11:32	10m	-16 / -	F5SJC	- / -10	3	✓ Closing fragment
07-07 11:26	10m	-12 / -	PA1HGM	- / -16	3	✓ Closing fragment
07-07 11:24	10m	-10 / -	YO9PH	- / -9	2	✓ Closing fragment
07-07 11:21	10m	-8 / -	PE9JAN	-14 / -13	4	✓ Closing observed
07-07 11:19	10m	-6 / -	PC4H	-12 / -9	3	Partial capture
07-06 12:07	20m	-16 / -	SQ6EMJ	- / -13	2	✓ Closing fragment
07-06 11:59	20m	-19 / -	DL6UM	- / -24	3	Partial capture
07-06 11:57	20m	- / -20	YO6LM	-14 / -	2	✓ Closing fragment
07-05 08:07	10m	-3 / -	HF5A	- / -14	2	✓ Closing fragment
07-05 08:01	10m	-7 / -	DJ1UJ	-10 / -15	5	Partial capture
07-05 08:01	10m	- / -	DN9AD	-9 / -	2	Partial capture
07-05 07:58	10m	-10 / -	UA3QNA	- / -8	2	✓ Closing fragment
07-05 07:56	10m	-2 / -	9A2KS	- / -	2	✓ Closing fragment
07-05 07:56	10m	- / -	DL3MIB	-3 / -	7	Partial capture
07-05 07:56	10m	- / -	DO3SK	-4 / -	5	Partial capture
07-05 07:53	10m	- / -	DN9AD	-9 / -	3	Partial capture
07-05 07:51	10m	-2 / -	TA7I	- / -6	2	✓ Closing fragment
07-05 07:48	10m	-9 / -	TA3ZZ	- / -15	3	✓ Closing fragment
07-05 07:47	10m	-3 / -5	DO5HJK	-6 / -13	5	✓ Full exchange observed
07-05 07:46	10m	- / -	DL3MIB	-2 / -	7	Partial capture
07-05 07:46	10m	- / -	DN9AD	-10 / -	2	Partial capture

Recent FT8 messages decoded at SO8OO

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

20m

UTC    dB Audio  Message
084100 -22 1350  M0PAW DL4QB RR73
084200 -20 1351  CQ DL4QB JO31 (x2)
084315 -13 1993  DL4QB HB9GUX JN36
084330 -19 1353  HB9GUX DL4QB +03 (x2)
193345 -23 1388  DL4QB EA3CY R-16 (x3)
085315 -21 1304  DL4QB F5LMJ R-26 (x3)
091545  +6 2624  DL4QB F1PBZ -07
092645 -12 1314  DL4QB LA1SNA JO49 (x2)

10m

UTC    dB Audio  Message
113145 -15 1301  CQ DL4QB JO31
113215 -17 1301  F5SJC DL4QB -10 (x3)
113345 -18 1301  CQ DL4QB JO31 (x3)
113700 -13 2027  DL4QB F4FSY -17 (x3)
185215  -7 1448  <...> DL4QB JO31 (x2)
185345 -22 1448  CQ DL4QB JO31
185715  -8 1448  EA3HLM DL4QB RR73
185745 -10 1448  CQ DL4QB JO31

40m

UTC    dB Audio  Message
163130 -22 1498  CQ DL4QB JO31                         a1 (x2)
163400 -22 1499  IK2ZJR DL4QB RR73
163830 -21 1494  SP3IPA DL4QB RR73
163845 -10 1010  DL4QB SP3IPA 73
143100 -22 1330  DL4QB SP9JMZ JO90

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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