DH1KU — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Fed. Rep. of Germany Most frequent locator attributed to this token: JO30

Receiver-side FT8 activity involving DH1KU, decoded by SO8OO in southeastern Poland. 1,817 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, 10m, across 46 UTC dates in the available aggregate history. Observed between 2026-07-17 and 2026-10-11.

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 1,817 FT8 messages attributed to DH1KU as the transmitting token by decoded message structure across 46 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (78%), followed by 80 m (11%) and 40 m (9%). Most decodes (76%) fell within the six-hour window 16:00-22:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -13 dB.

Overview

1,817

Messages attributed

UTC dates decoded

331

Active 15-min windows

-13 dB

Estimated median S/N

Bands

80m · 200 40m · 163 20m · 1,424 10m · 30

First attributed message: 2026-07-17
Last attributed message: 2026-10-11 20:51 UTC

Observed FT8 message patterns

Attributed sample: 1,817 messages
Active dates: 46 UTC dates
Estimated median S/N: -13 dB
Estimated 10th-90th percentile: -20 to -5 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 598, moderate (-15 to -9 dB) 816, strong (≥ -8 dB) 403.

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 DH1KU in decoded directed-looking exchanges:

EA8UP · Canary Islands ×3 7Z1BQ · Saudi Arabia ×2 HG0NPJ · Hungary ×2 M1DBW · England ×2 M6FPW · England ×2 S56KO · Slovenia ×2 SV2HTW · Greece ×2 F5NNN · France ×2 2I0WMN · Northern Ireland 3Z0L · Poland 7K1CPT · Japan 7X3WPL · Algeria

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 DH1KU

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: JO30 · 1,314 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,053 km (approx.)
Last such locator decoded: 2026-10-11 20:51 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	DH1KU S/N	Counterpart	Counterpart S/N	Msgs	Capture
10-11 20:45	80m	- / -21	OK1XOE	+6 / -	2	✓ Closing fragment
10-11 20:44	80m	- / -	RA4Y	-4 / -	4	Partial capture
10-11 20:35	80m	-4 / -18	YL2SW	+12 / -	9	Partial capture
10-11 20:29	80m	-15 / -	SM2OTU	- / -19	4	Partial capture
10-11 20:27	80m	-15 / -	TF4M	- / -	2	Partial capture
10-11 20:25	80m	- / -13	SP9TBT	0 / -	2	✓ Closing fragment
10-11 20:20	40m	- / -11	HB9ELE	-12 / -	2	✓ Closing fragment
10-03 21:55	80m	-10 / -	HA4MDE	- / -	2	Partial capture
10-03 21:50	80m	-8 / -	MM0ULL	- / -	2	Partial capture
10-03 21:34	80m	-8 / -19	MX0SQC	-13 / -4	6	✓ Full exchange observed
10-03 21:26	80m	- / -11	G8BCG	-14 / -	2	✓ Closing fragment
10-03 20:47	40m	-9 / -	LA2DMA	- / -	4	Partial capture
10-03 20:36	40m	-12 / -14	SV2HTW	+8 / -9	11	✓ Full exchange observed
10-03 20:31	40m	-15 / -16	SV8DCW	-4 / -10	5	✓ Full exchange observed
09-26 20:53	80m	-10 / -	DL6TNT/P	- / -	5	Partial capture
09-22 20:44	80m	-11 / -5	EI9FVB	-7 / -7	4	✓ Full exchange observed
09-13 20:44	80m	-9 / -	OZ6TW	- / -	2	Partial capture
09-13 20:40	80m	+3 / -	EI2KZB	-23 / -	2	✓ Closing observed
09-13 20:36	40m	-11 / -	SQ9SET	- / -	3	Partial capture
09-13 20:33	40m	-9 / -	II0CDS	- / -	5	Partial capture
09-13 20:30	40m	-10 / -	EA8Y	- / -	2	Partial capture
09-12 20:32	40m	-13 / -	GB1HTC	- / -1	4	Partial capture
09-12 20:27	40m	-17 / -	GB1HTC	-10 / -1	3	Partial capture
09-12 20:24	40m	-12 / -9	HB9HSJ	+4 / +2	5	Partial capture
09-12 20:23	40m	-14 / -	IR0IADU	- / -	2	Partial capture
09-10 21:26	80m	-13 / -7	Z62NS	+5 / -2	5	✓ Full exchange observed
09-07 21:02	40m	-4 / -	UA3UBV/1	- / -	2	Partial capture
09-07 21:02	40m	-5 / -16	EA5JLN	-18 / -8	8	Partial capture
09-07 21:00	40m	-8 / -7	SM7TZK	-12 / -	3	✓ Closing observed
09-06 21:18	80m	-8 / -	SQ100PKP	- / -	2	Partial capture
09-06 21:12	80m	-4 / -	5Z4VJ	- / -	14	Partial capture
09-06 21:06	80m	-14 / -	5Z4VJ	- / -	7	Partial capture
09-06 20:56	80m	-14 / +1	SO100PKP	+15 / 0	4	Partial capture
09-06 20:42	40m	-13 / -	CN8NS	- / -	5	Partial capture
09-03 21:53	40m	-10 / -	KP4MP	- / -	7	Partial capture
09-03 20:57	40m	-16 / -	CN8NS	- / -	8	Partial capture
09-03 20:52	40m	-16 / -	SV9QWC	-15 / -23	3	✓ Closing observed
09-03 20:47	40m	-16 / -	SV9QWC	- / -	5	Partial capture
09-03 20:45	40m	-15 / -	F5RAV	- / -	3	Partial capture
09-03 20:39	40m	-17 / +2	F5RAV	-9 / -	4	✓ Closing observed
09-03 20:37	40m	-14 / -8	F4SNF	-9 / -3	6	✓ Full exchange observed
09-02 21:57	80m	-10 / -19	4O7CC	-6 / -13	6	✓ Full exchange observed
09-02 21:55	80m	-11 / -8	DD0AM	-10 / -2	5	✓ Full exchange observed
08-31 19:15	20m	-3 / -	SV2KBB	- / -	4	Partial capture
08-31 19:04	20m	-6 / -	SQ8ACE	- / -	2	Partial capture
08-30 20:40	80m	-8 / -	MI0OBC	- / -6	2	✓ Closing fragment
08-30 20:34	80m	-13 / -	IU1DXU	-9 / -	3	✓ Closing observed
08-30 20:33	80m	-13 / 0	ON3EBR	-8 / +4	5	✓ Full exchange observed
08-30 20:30	80m	-10 / -20	EA8UP	-14 / -2	7	✓ Full exchange observed
08-30 20:27	80m	-8 / -9	9A2LM	+6 / -17	4	✓ Full exchange observed

Recent FT8 messages decoded at SO8OO

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

80m

UTC    dB Audio  Message
203800  -8 2192  YL2SW DH1KU JO30 (x6)
204045 +12 1973  DH1KU YL2SW -18 (x2)
204415  -5 1455  DH1KU RA4Y LO35 (x3)
204530  +9 2278  DH1KU OK1XOE -21
204545  -5 1454  DH1KU RA4Y LO35
204600  +4 2278  DH1KU OK1XOE RR73
205145 -10 2321  IZ8XQC DH1KU JO30

40m

UTC    dB Audio  Message
203715 +10  535  DH1KU SV2HTW -14
203730 -11 1995  SV2HTW DH1KU R-16
203745  +5  534  DH1KU SV2HTW -14
203800 -16 1995  SV2HTW DH1KU R-10
203815  +8  534  DH1KU SV2HTW -14
203830 -10 1995  SV2HTW DH1KU R-09 (x2)
204015  +9  534  DH1KU SV2HTW RR73
204730 -11 1995  LA2DMA DH1KU JO30 (x4)
205200  -8 1995  SP9DPM/P DH1KU JO30
202030  -8  796  DH1KU HB9ELE -11 (x2)

20m

UTC    dB Audio  Message
174200  +2 2350  YO7VNS DH1KU 73
174900  -4 2132  SV9BMG DH1KU JO30 (x6)
185845 -21 1093  DH1KU TC30AUG -07
190445  -6 1664  SQ8ACE DH1KU JO30 (x2)
191345  -7 1664  E72T DH1KU JO30
191515  -6 2281  SV2KBB DH1KU JO30 (x4)

10m

UTC    dB Audio  Message
122900 -18 1448  EA5IH DH1KU R-06
123700 -19 1447  R1BED DH1KU JO30
130400 -20 1421  IK0PRP DH1KU JO30 (x3)
131100 -20 1421  HA7JLR DH1KU JO30
091000 -14 2167  9J2FI DH1KU JO30 (x2)
110030 -16 1028  DH1KU EN35UKR -20 (x2)
081200 -12 2267  DH1KU IW8PQ -05 (x5)

60m

UTC    dB Audio  Message
211530  -8  380  DH1KU G1SID -12 (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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