DL4FCK — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Fed. Rep. of Germany Most frequent locator attributed to this token: JO50

Receiver-side FT8 activity involving DL4FCK, decoded by SO8OO in southeastern Poland. 881 FT8 messages attributed to this token as transmitter, on 40m, 20m, 10m, across 36 UTC dates in the available aggregate history. Observed between 2026-06-08 and 2026-08-18.

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 881 FT8 messages attributed to DL4FCK as the transmitting token by decoded message structure across 36 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (91%), followed by 40 m (7%) and 10 m (2%). Most decodes (68%) fell within the six-hour window 09:00-15:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -11 dB.

Overview

881

Messages attributed

UTC dates decoded

115

Active 15-min windows

-11 dB

Estimated median S/N

Bands

40m · 63 20m · 804 10m · 14

First attributed message: 2026-06-08
Last attributed message: 2026-08-18 15:17 UTC

Observed FT8 message patterns

Attributed sample: 881 messages
Active dates: 36 UTC dates
Estimated median S/N: -11 dB
Estimated 10th-90th percentile: -19 to -2 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 235, moderate (-15 to -9 dB) 320, strong (≥ -8 dB) 326.

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 DL4FCK in decoded directed-looking exchanges:

K4CAE · United States ×2 2D0VPS/P · Isle of Man 9A3AUH · Croatia 9A4DK · Croatia 9A5MP · Croatia 9H2TM · Malta BH9CA · China CR7BUJ · Portugal CT1BFP · Portugal DL1R · Fed. Rep. of Germany DL1YBI · Fed. Rep. of Germany G1CEC · England

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 DL4FCK

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: JO50 · 728 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 770 km (approx.)
Last such locator decoded: 2026-08-18 15:17 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	DL4FCK S/N	Counterpart	Counterpart S/N	Msgs	Capture
08-19 15:02	10m	- / -	DH5BM	-4 / -	4	Partial capture
08-12 14:09	20m	-2 / -	TT1GD	- / -	3	Partial capture
08-11 13:34	20m	-9 / -	JH0INP	- / -4	3	✓ Closing fragment
08-11 13:31	20m	-10 / -3	PE0F	+4 / -	8	Partial capture
08-09 13:38	20m	- / -10	F1PBZ	0 / -	2	Partial capture
08-08 05:42	40m	-1 / -	KE4EB	- / -12	8	✓ Closing fragment
08-08 05:41	40m	+2 / -	PE1MHY	- / +3	2	Partial capture
08-08 05:40	40m	-1 / -	YB8CP	- / -	2	Partial capture
08-07 05:47	40m	-2 / -6	YT2ZE	-17 / -9	6	Partial capture
08-07 05:42	40m	+1 / -	HI8UD	- / -14	3	✓ Closing fragment
08-07 05:39	40m	-1 / -	TF3VS	- / -	6	Partial capture
08-07 05:38	40m	-4 / -	PI4TS	- / -3	2	Partial capture
08-07 05:37	40m	0 / -	KP4DDY	- / -	2	Partial capture
08-06 09:27	20m	-9 / -	VO1HH	- / -	3	Partial capture
08-03 11:09	20m	-10 / -	CR7BUJ	- / -	2	Partial capture
08-01 13:58	20m	- / -8	YT1DDL	-16 / -	2	Partial capture
08-01 13:53	20m	-2 / -	YT1DDL	- / -	3	Partial capture
08-01 13:46	20m	-5 / -	R4FCK	- / -	6	Partial capture
08-01 13:44	20m	-2 / -	RA0LQ	- / -	3	Partial capture
08-01 13:43	20m	-7 / -	BH8VRO	- / -	2	Partial capture
07-30 14:05	20m	-2 / -	<...>	- / -	19	Partial capture
07-30 14:01	20m	-2 / -	ON3CH	- / -23	7	Partial capture
07-30 13:54	20m	-3 / -	PH1UW	- / -	11	Partial capture
07-30 13:51	20m	- / -	PE9JAN	-4 / -	3	Partial capture
07-30 12:30	20m	- / -16	TA3TER	-22 / -	3	✓ Closing fragment
07-30 11:16	20m	-7 / -	UA6FZ	- / -	5	Partial capture
07-30 11:15	20m	- / -	F5RRS	-12 / -	3	Partial capture
07-30 11:10	20m	-7 / -3	RW4YD	-15 / -15	6	✓ Full exchange observed
07-30 11:09	20m	-4 / -15	OZ9FF	-15 / -	2	Partial capture
07-28 12:23	20m	-6 / -	R2GFD	- / -6	4	Partial capture
07-28 12:18	20m	-7 / -	YL3GAO	- / -	4	✓ Closing fragment
07-28 12:17	20m	- / -8	F1PBZ	+9 / -	2	Partial capture
07-27 14:22	20m	- / -13	RA9YTI	-20 / -	2	Partial capture
07-26 07:09	20m	-20 / -	Z62NS	- / -	2	Partial capture
07-24 14:57	20m	-18 / -	RW0AR	- / -	4	Partial capture
07-24 14:46	20m	-14 / -	RW0AR	- / -	4	Partial capture
07-24 14:41	20m	-23 / -	RW0AR	- / -	2	Partial capture
07-24 14:40	20m	-20 / -	DL1YBI	- / +6	7	✓ Closing fragment
07-24 14:36	20m	-16 / -14	OE6TNO	-10 / -9	7	✓ Closing observed
07-22 12:00	20m	-11 / -	UN0GY	- / -	8	Partial capture
07-22 10:01	20m	-16 / -	LX1RFJ	- / -	5	Partial capture
07-22 09:56	20m	-16 / -	<...>	- / -	4	Partial capture
07-22 09:47	20m	-16 / -	VE2OPR	- / -	12	Partial capture
07-22 09:42	20m	-16 / -	HI8DX	- / -	10	Partial capture
07-22 09:38	20m	-17 / -	HI8J	- / -	5	Partial capture
07-22 09:33	20m	-16 / -	HI8DX	- / -	2	Partial capture
07-22 09:26	20m	-15 / -	HI8DX	- / -	5	Partial capture
07-22 09:20	20m	-15 / -	IZ0AIO	- / -	3	Partial capture
07-22 09:19	20m	-19 / -7	UT0CK	-14 / -	9	Partial capture
07-22 09:11	20m	-17 / -	RN9N	- / -9	10	Partial capture

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
054930 -17 1228  DL4FCK YT2ZE -06
054945  -3  735  YT2ZE DL4FCK R-09
054030  -3  584  YB8CP DL4FCK JO50 (x2)
054130  +3  584  PE1MHY DL4FCK JO50 (x2)
054230  +4  584  KE4EB DL4FCK JO50 (x8)
024545 -14 2197  DL4FCK UA9SY -20

10m

UTC    dB Audio  Message
133730 -20 1884  GU4WRP DL4FCK JO50 (x5)
080200 -10 2519  DL4FCK <...> -08 (x5)
134730  +0 2598  DL4FCK F1PBZ -12
150200  -2  578  DL4FCK DH5BM JO41 (x4)

20m

UTC    dB Audio  Message
133330 -12  522  PE9JAN DL4FCK JO50
133345  +2  901  DL4FCK PE0F -03 (x2)
133430 -11  522  JH0INP DL4FCK JO50
133445  -1  901  DL4FCK PE0F -03
133600  -8  522  JH0INP DL4FCK R-04 (x2)
140915  -2  804  CQ DX DL4FCK JO50
140945  -1  804  TT1GD DL4FCK JO50 (x3)
171130  +1  883  DL4FCK F4ACR IN96
151545  -8  884  CQ DL4FCK JO50
151700 -13 1041  DL4FCK GE3ZQQ IO82
151715 -10  884  UB8CSJ DL4FCK JO50

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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