DK4DAX — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Fed. Rep. of Germany

Receiver-side FT8 activity involving DK4DAX, decoded by SO8OO in southeastern Poland. 10 FT8 messages attributed to this token as transmitter, on 40m, 20m, across 4 UTC dates in the available aggregate history. Observed between 2026-06-18 and 2026-06-29.

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 10 FT8 messages attributed to DK4DAX as the transmitting token by decoded message structure across 4 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (70%), followed by 40 m (30%). In this small sample, the estimated median decoder S/N was -8 dB; no usual signal pattern is inferred.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-8 dB

Estimated median S/N

Bands

40m · 3 20m · 7

First attributed message: 2026-06-18
Last attributed message: 2026-06-29 20:19 UTC

Observed FT8 message patterns

Attributed sample: 10 messages
Active dates: 4 UTC dates
Estimated median S/N: -8 dB
S/N percentile sample: Too small
Recurring-pattern threshold: Not met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 0, moderate (-15 to -9 dB) 4, strong (≥ -8 dB) 6.

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. The sample does not meet the threshold for a recurring time or signal-pattern claim (20 attributed messages, three UTC dates and five distinct 15-minute windows).

Frequent counterpart tokens observed at SO8OO

Tokens most often paired with DK4DAX in decoded directed-looking exchanges:

ER1WK · Moldova F4LQJ · France M0SLY · England DJ2MS · Fed. Rep. of Germany DK3KM · Fed. Rep. of Germany DK3ME · Fed. Rep. of Germany F1IQH · France GJ0KYZ · Jersey DK0ACI · Fed. Rep. of Germany

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	DK4DAX S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-13 10:07	40m	- / -9	DL0HAM	-1 / -	9	Partial capture
09-13 10:06	40m	- / -	DK0KG	-21 / -	7	Partial capture
08-27 19:56	80m	- / -15	DK0ACI	+4 / -	2	✓ Closing fragment
08-27 19:55	80m	- / -18	DD0AM	-6 / -	4	Partial capture
07-30 19:46	40m	- / -9	DK3ME	-2 / -	4	✓ Closing fragment
07-30 19:44	40m	- / -13	DL1NEO	-2 / -	2	Partial capture
07-30 19:40	40m	- / -5	F1IQH	-14 / -	2	✓ Closing fragment
07-18 20:20	40m	- / -11	DK3KM	-8 / -	5	✓ Closing fragment
07-12 10:10	20m	- / -12	F4LQJ	-16 / -	2	✓ Closing fragment
07-05 20:18	40m	- / -12	MW0USK	+3 / -	3	Partial capture
06-29 20:14	20m	+3 / -	TJ1GD/P	- / -22	5	Partial capture
06-25 21:02	80m	- / -	GB198KHZ	+4 / -	6	Partial capture
06-25 21:00	80m	- / -	PA/DK4DAX	+4 / -	4	Partial capture
06-24 18:39	40m	-10 / -	GJ0KYZ	- / +4	2	✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
100730  -1 1423  DK4DAX DL0HAM -09
100730 -23 1557  DK4DAX DK0KG JN49
100800  -1 1423  DK4DAX DL0HAM -09
100800 -22 1558  DK4DAX DK0KG JN49
100830  -6 1422  DK4DAX DL0HAM -09 (x2)
100900 -23 1558  DK4DAX DK0KG JN49
100930  +3 1423  DK4DAX DL0HAM -09 (x2)
101000 -21 1558  DK4DAX DK0KG JN49
101030  +1 1423  DK4DAX DL0HAM -09
101030 -22 1558  DK4DAX DK0KG JN49
101100  +7 1423  DK4DAX DL0HAM -09 (x3)

80m

UTC    dB Audio  Message
210115  +4  832  DK4DAX PA/DK4DAX (x2)
210215  +3  831  DK4DAX GB198KHZ (x6)
210545  +3  832  DK4DAX <...>
195500  -1  485  DK4DAX DD0AM -18 (x2)
195600  +5  353  DK4DAX DK0ACI -15
195600  -7  485  DK4DAX DD0AM -18
195630  +3  354  DK4DAX DK0ACI RR73
195630  -6  485  DK4DAX DD0AM -18

20m

UTC    dB Audio  Message
102645 -10  273  ER1WK DK4DAX 73
151445 -13  379  AO25 DK4DAX -
201445  +4  657  TJ1GD/P DK4DAX -22 (x5)
101045 -18 1144  DK4DAX F4LQJ -12 (x2)
091145 -14 1002  DK4DAX M0SLY RR73

10m

UTC    dB Audio  Message
104815 -16 1143  DK4DAX A60PC/5 R-12

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.

FT8DB and SO8OO WebSDR are a hobby project maintained solo. ☕ Buy me a coffee