DK8SJ — reception at SO8OO

Signals decoded by SO8OO in southeastern Poland. FT8 and CW have separate histories; all times are UTC.

FT8 activity

DXCC entity inferred from callsign: Fed. Rep. of Germany Most frequent locator attributed to this token: JN47

Receiver-side FT8 activity involving DK8SJ, decoded by SO8OO in southeastern Poland. 457 FT8 messages attributed to this token as transmitter, on 40m, 20m, 10m, across 18 UTC dates in the available aggregate history. Observed between 2026-06-09 and 2026-11-06.

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 457 FT8 messages attributed to DK8SJ as the transmitting token by decoded message structure across 18 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (62%), followed by 40 m (30%) and 10 m (8%). Most decodes (86%) fell within the six-hour window 17:00-23:00 UTC. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (68%); the estimated median was -4.9 dB.

Overview

457

Messages attributed

UTC dates decoded

Active 15-min windows

-4.9 dB

Estimated median S/N

Bands

40m · 136 20m · 285 10m · 36

First attributed message: 2026-06-09
Last attributed message: 2026-11-06 22:18 UTC

Observed FT8 message patterns

Attributed sample: 457 messages
Active dates: 18 UTC dates
Estimated median S/N: -4.9 dB
Estimated 10th-90th percentile: -16 to +3 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 47, moderate (-15 to -9 dB) 97, strong (≥ -8 dB) 313.

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 DK8SJ in decoded directed-looking exchanges:

DD1OO · Fed. Rep. of Germany EA5KA · Spain HZ1TT · Saudi Arabia OE3RWR · Austria OK1ACE · Czech Republic TA2LE · Asiatic Turkey UB3XCC/QRP · European Russia UT2PC · Ukraine YO2UKG · Romania

Most frequent locator attributed to DK8SJ

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: JN47 · 205 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 975 km (approx.)
Last such locator decoded: 2026-11-06 22:15 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	DK8SJ S/N	Counterpart	Counterpart S/N	Msgs	Capture
11-06 22:16	40m	-9 / -	IU4DTV/QRP	- / -	2	Partial capture
11-06 22:14	40m	-2 / -	W1FAM	- / -	2	Partial capture
11-06 22:12	40m	-13 / -	TA3ZZ	- / -	2	Partial capture
11-06 22:05	40m	-10 / -	UB3XCC/QRP	- / -	2	✓ Closing fragment
11-06 21:38	40m	-13 / -	EA8CZ	- / -	3	Partial capture
11-05 13:12	40m	- / -13	DD1OO	-8 / -	4	✓ Closing fragment
11-04 21:42	40m	- / -	IU8RFW	-4 / -	4	Partial capture
11-04 21:13	40m	-19 / -	OK1ACE	- / -4	3	✓ Closing fragment
09-29 20:37	40m	+4 / -	LZ3CB	- / -	2	Partial capture
09-29 20:25	40m	-6 / -	YO2UKG	- / -15	3	✓ Closing fragment
09-29 20:23	40m	-7 / -	UT2PC	- / 0	3	✓ Closing fragment
09-29 20:20	40m	-4 / +8	EA5KA	+5 / -	4	✓ Closing observed
09-19 04:03	40m	- / -	CT2HEX	-12 / -	2	Partial capture
09-19 04:02	40m	- / -	UA4FKT	+12 / -	2	Partial capture
09-19 03:54	40m	- / -17	N1NRL	-12 / -	2	Partial capture
09-19 03:41	40m	- / -10	HZ1TT	-14 / -	3	✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
214200 -15  926  DL3DQL/P DK8SJ
215045  -4  519  UR3HC DK8SJ JN47
215315 -13  240  AI4UC DK8SJ R-20
215415 -14  239  F8MRQ DK8SJ JN47
220500 -12  926  UB3XCC/QRP DK8SJ
220515 -15  927  DK8SJ A61DD -16
220600  -9  926  UB3XCC/QRP DK8SJ 73
220815  -3  354  NX8T DK8SJ JN47
221100 -13 1119  TA2LE DK8SJ 73
221215 -12 1585  TA3ZZ DK8SJ JN47 (x2)
221445  -5  462  W1FAM DK8SJ JN47 (x2)
221645  -8  765  IU4DTV/QRP DK8SJ (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.

CW

No CW receptions recorded for this callsign in the last 30 days.

Explore CW reception at SO8OO

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