DA1MK — 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 DA1MK, decoded by SO8OO in southeastern Poland. 129 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, across 15 UTC dates in the available aggregate history. Observed between 2026-06-09 and 2026-08-29.

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 129 FT8 messages attributed to DA1MK 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 (63%), followed by 40 m (33%) and 80 m (4%). Several six-hour UTC windows tied for the largest share (64%), so no unique busiest interval is claimed. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -9 dB.

Overview

129

Messages attributed

UTC dates decoded

Active 15-min windows

-9 dB

Estimated median S/N

Bands

80m · 5 40m · 43 20m · 81

First attributed message: 2026-06-09
Last attributed message: 2026-08-29 12:42 UTC

Observed FT8 message patterns

Attributed sample: 129 messages
Active dates: 15 UTC dates
Estimated median S/N: -9 dB
Estimated 10th-90th percentile: -16 to +3 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 13, moderate (-15 to -9 dB) 60, strong (≥ -8 dB) 56.

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 DA1MK in decoded directed-looking exchanges:

CU6NS · Azores EU6KA · Belarus F1THK · France F4FSY · France F4HSB · France F5IXN · France F5RRS · France F5URG · France G4DBW · England HB9EFK · Switzerland LA2PIA · Norway OH4NDU · Finland

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 DA1MK

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 · 9 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,054 km (approx.)
Last such locator decoded: 2026-07-12 03:24 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	DA1MK S/N	Counterpart	Counterpart S/N	Msgs	Capture
08-29 12:39	40m	-13 / 0	DL9KM	-9 / -	6	✓ Closing observed
08-20 15:58	20m	- / -20	9A3TGY	-9 / -	5	Partial capture
08-20 13:52	20m	+10 / -14	RW6HPI	+6 / -3	3	Partial capture
08-20 13:49	20m	+4 / -	SP9JP	- / 0	3	Partial capture
08-20 13:48	20m	+2 / -	OK5AW	- / +5	2	✓ Closing fragment
08-01 14:24	20m	-15 / -11	R3ES	-21 / -	2	✓ Closing observed
08-01 14:21	20m	-12 / -	TF4M	-7 / -4	2	✓ Closing observed
08-01 14:17	20m	- / -7	UB6LTL	+3 / -	2	Partial capture
07-19 04:58	40m	-10 / -	WA2HIP	- / -16	2	Partial capture
07-19 04:57	20m	- / -8	9H4JX	-10 / -	2	Partial capture
07-12 03:22	80m	-5 / -2	IQ4JO	+10 / +5	5	✓ Full exchange observed
07-12 03:16	40m	-8 / -	KC2YYF	- / 0	2	✓ Closing fragment
07-12 03:04	40m	-12 / -	TJ1GD/P	- / -17	3	✓ Closing fragment
07-12 03:03	40m	-8 / -	TA3ZZ	- / -15	2	Partial capture
07-09 10:02	40m	- / -15	OK6AB	-12 / -	3	✓ Closing fragment
07-09 09:50	40m	- / -3	DL6CMF	-16 / -	2	✓ Closing fragment
07-09 09:43	40m	- / -10	9A9TT	-14 / -	2	✓ Closing fragment
07-09 09:32	20m	- / -19	F5URG	+2 / -	2	✓ Closing fragment
07-09 08:37	20m	-9 / -	KF0YOB	- / -16	2	Partial capture
07-09 05:10	40m	-10 / -	T40FRC	- / -22	2	Partial capture
07-07 06:28	20m	-8 / -1	F5IXN	-16 / -	5	✓ Closing observed
07-07 06:26	20m	- / +1	G4DBW	-13 / -	3	✓ Closing fragment
07-07 06:24	20m	-7 / -	F4FSY	- / +6	3	✓ Closing fragment
07-07 06:23	20m	-8 / -	OH4NDU	- / -14	2	✓ Closing fragment
07-07 06:21	20m	-8 / -	3V8HP	- / -7	3	Partial capture
07-07 06:19	20m	-9 / -12	DM6KW	-20 / -18	2	Partial capture
07-07 06:17	20m	-12 / -1	HB9EFK	-1 / -	3	✓ Full exchange observed
07-07 06:16	20m	-17 / -	F4HSB	- / -1	2	✓ Closing fragment
07-07 06:13	20m	-12 / -	KF0YOB	- / -22	2	Partial capture
07-07 06:12	20m	-14 / -14	F5RRS	+8 / -	4	✓ Closing observed
07-07 06:11	20m	-20 / -14	EU6KA	-14 / -	3	✓ Closing observed
07-07 06:07	20m	-13 / -	RI0SP	- / -21	3	Partial capture
07-04 04:47	40m	-12 / -	OA4ENG	- / -13	2	Partial capture
07-04 04:45	40m	-12 / -	CN2DX	- / -3	2	✓ Closing fragment
07-03 05:31	40m	- / +5	DA0WWA	-18 / -	2	Partial capture
07-03 05:08	20m	- / -17	K2K	-10 / -	2	Partial capture
07-02 17:27	20m	-10 / -	CU6NS	- / -16	4	✓ Closing fragment
06-26 15:40	20m	-8 / -	LA1PHA	- / -17	2	Partial capture
06-24 09:12	20m	- / -14	DK7ZT	-16 / -	4	Partial capture
06-24 09:11	20m	-6 / -	SP9YGD	- / -17	3	✓ Closing fragment
06-24 09:09	20m	-7 / -8	S51DD	-4 / +6	3	✓ Full exchange observed
06-24 08:49	20m	-9 / -	W4IMD	- / -17	3	Partial capture

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
031600 -10 2423  KC2YYF DA1MK +00 (x2)
031730  -8 2386  KJ5PTH DA1MK -20
031845 -10 2386  YO9IAB DA1MK +11
031930 -17 2234  KD2UZT DA1MK -15
045945  -9 2553  DA1MK IQ4JO JN63
045830  -5 2609  WA2HIP DA1MK -16 (x2)
050300 -17 2379  T48FCR DA1MK -08
123945  -8 1348  DA1MK DL9KM JN68 (x4)
124200 -13 2458  DL9KM DA1MK RR73
124215 -13 1348  DA1MK DL9KM 73

20m

UTC    dB Audio  Message
142445 -15 2556  R3ES DA1MK RR73
134815  -1 2802  OK5AW DA1MK +05 (x2)
134915  +3 2802  7X2KF DA1MK -15
134945  +8 2802  SP9JP DA1MK +00 (x3)
135200 +10 2861  RW6HPI DA1MK -03
135245  +5 1990  DA1MK RW6HPI R-14 (x2)
155815 -13 2812  DA1MK 9A3TGY R-20 (x5)

80m

UTC    dB Audio  Message
032230  -9 2332  CQ DA1MK JO31
032245  +8 2563  DA1MK IQ4JO JN63
032300  -6 2457  IQ4JO DA1MK +05
032315 +12 2563  DA1MK IQ4JO R-02
032330  -4 2457  IQ4JO DA1MK RR73
032345 +10 2563  DA1MK IQ4JO 73
032400  -4 2460  CQ DA1MK JO31                         a1
032445  +2 2460  DO1ID DA1MK +14

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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