DK8SJ — FT8 activity observed at SO8OO

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. 420 FT8 messages attributed to this token as transmitter, on 40m, 20m, 10m, across 15 UTC dates in the available aggregate history. Observed between 2026-06-09 and 2026-07-29.

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 420 FT8 messages attributed to DK8SJ 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 (68%), followed by 40 m (24%) and 10 m (9%). Most decodes (85%) 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 (70%); the estimated median was -4 dB.

Overview

420

Messages attributed

UTC dates decoded

Active 15-min windows

-4 dB

Estimated median S/N

Bands

40m · 99 20m · 285 10m · 36

First attributed message: 2026-06-09
Last attributed message: 2026-07-29 20:31 UTC

Observed FT8 message patterns

Attributed sample: 420 messages
Active dates: 15 UTC dates
Estimated median S/N: -4 dB
Estimated 10th-90th percentile: -16 to +3 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 42, moderate (-15 to -9 dB) 82, strong (≥ -8 dB) 296.

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:

CR7BRV · Portugal ×2 EA8CVR · Canary Islands ×2 F5RMK · France ×2 EA2BHE · Spain EC3A · Spain OZ9WRH · Denmark R2EA · European Russia RA9LL · Asiatic Russia RX9ABI · Asiatic Russia SV2CLJ · Greece UA6HGM · European Russia UX7QV · Ukraine

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 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 · 185 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 975 km (approx.)
Last such locator decoded: 2026-07-29 20:30 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
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
07-29 20:30	20m	-10 / -11	TN8GD	-6 / -12	4	✓ Full exchange observed
07-29 20:20	20m	-20 / -	IK1RQX	- / -11	2	✓ Closing fragment
07-29 14:19	20m	- / -	F4BJN	+2 / -	4	Partial capture
07-29 14:18	20m	-9 / -	IK2IAQ	-6 / -16	3	✓ Full exchange observed
07-28 21:23	20m	+5 / -	M6MHG	+4 / -	4	Partial capture
07-28 21:16	20m	-2 / -	JA8KSF	- / -	2	Partial capture
07-28 21:14	20m	-8 / -	PI4DX	- / +5	3	✓ Closing fragment
07-28 21:11	20m	-8 / -	EI9KF	- / -14	4	✓ Closing fragment
07-28 21:10	20m	-5 / -	ON3KJU	- / -7	3	✓ Closing fragment
07-28 21:07	20m	-3 / -2	9K2YM	-3 / 0	3	✓ Full exchange observed
07-28 20:59	20m	-2 / +1	GM3AND	-3 / -9	4	✓ Full exchange observed
07-28 20:57	20m	-2 / -	EI9KF	- / -	2	Partial capture
07-28 20:54	20m	-8 / -15	9A5E	-4 / -15	8	✓ Full exchange observed
07-28 20:53	20m	+2 / -3	EA4GA	-12 / -9	5	✓ Full exchange observed
07-28 20:51	20m	-12 / -	YO9HP	- / +1	2	✓ Closing fragment
07-28 20:49	20m	-3 / -6	EK/RX3DPK	+1 / -15	4	✓ Full exchange observed
07-28 20:45	20m	-10 / -	EI9KF	- / -16	4	Partial capture
07-28 20:44	20m	-4 / 0	EA7GRD	-9 / -16	5	✓ Full exchange observed
07-27 20:01	20m	-5 / -	EI9KF	- / -18	4	Partial capture
07-27 19:52	20m	+6 / -	LB7XH	- / -11	3	✓ Closing fragment
07-27 19:44	20m	+1 / -	M7UFX	- / -13	6	✓ Closing fragment
07-27 19:42	20m	+12 / -13	JE1FQV	-4 / -	3	Partial capture
07-27 19:37	20m	-7 / 0	G8IXM	-14 / -21	4	✓ Full exchange observed
07-27 19:27	20m	-16 / -	PA2WDR	- / -8	3	✓ Closing fragment
07-27 19:23	20m	-15 / -	PA3FWU	- / -	3	Partial capture
07-27 19:21	20m	-2 / -8	UR7FM	-11 / -13	5	✓ Full exchange observed
07-27 19:18	20m	-6 / -	YO8CNA	- / -9	2	Partial capture
07-27 19:15	20m	-11 / -	YO9PH	- / +2	3	✓ Closing fragment
07-24 10:36	10m	+3 / -	RN9N	- / -	2	Partial capture
07-24 10:32	10m	+4 / -	EA1GTX	- / 0	4	Partial capture
07-24 10:29	10m	-1 / -	R2EA	- / -7	2	✓ Closing fragment
07-24 10:26	10m	+8 / -	UX7QV	- / -	2	✓ Closing fragment
07-24 10:23	10m	-1 / -	EA2BHE	- / -14	3	✓ Closing fragment
07-24 10:21	10m	-5 / -	UA6HGM	- / -	3	✓ Closing fragment
07-24 10:14	10m	-7 / -	RN9N	- / -	5	Partial capture
07-24 10:12	10m	+3 / -	RX9ABI	- / -6	3	✓ Closing fragment
07-24 10:11	10m	-5 / -	G4DBW	- / -	2	Partial capture
07-24 10:08	10m	+6 / -	RA9LL	- / -9	4	✓ Closing fragment
07-22 20:38	20m	-18 / -	ON4NYO	- / +5	2	Partial capture
07-22 20:34	20m	-2 / -	JA3LEV	- / -20	3	Partial capture
07-22 20:33	20m	-14 / -	M8EUF	- / -6	2	✓ Closing fragment
07-22 20:26	20m	-6 / -7	TF4M	-13 / -1	4	Partial capture
07-22 20:23	20m	-8 / -	MI0JZZ	- / -6	5	✓ Closing fragment
07-22 20:16	20m	-16 / -	BI4AJO	- / -	3	Partial capture
07-21 20:36	20m	-7 / +7	TA7D	-5 / -15	4	✓ Full exchange observed
07-21 20:30	20m	-2 / -	HG8LXL	- / -8	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
212215  -4  436  DK8SJ F6HRP RR73
212230  -2  436  F6HRP DK8SJ 73
212345 -19 1518  IU8TIT DK8SJ JN47
212545  -9 2734  M0ENG DK8SJ JN47 (x3)
034100 -16 1731  DK8SJ HZ1TT -10 (x3)
035445 -12 2569  DK8SJ N1NRL -17 (x2)
040245 +16  494  DK8SJ UA4FKT LO23 (x2)
040345 -13 2249  DK8SJ CT2HEX IM58 (x2)

20m

UTC    dB Audio  Message
212500  +3 2781  DK8SJ M6MHG +16
141845  -6  472  DK8SJ IK2IAQ +14
141900  -9  471  IK2IAQ DK8SJ R-16
141915  -5  468  DK8SJ IK2IAQ RR73
141945  +2  473  DK8SJ F4BJN JN25 (x4)
201000  -3  350  UW5KW DK8SJ JN47
202000 -15 1919  IK1RQX DK8SJ -11 (x2)
203045  -7  855  TN8GD DK8SJ JN47
203100  -6  857  DK8SJ TN8GD -11
203115 -12  856  TN8GD DK8SJ R-12
203130  -5  856  DK8SJ TN8GD RR73

10m

UTC    dB Audio  Message
102430  +0  492  EA2BHE DK8SJ 73
102600  +5  492  UX7QV DK8SJ RR73 (x2)
102700  +4  492  CQ DK8SJ JN47 (x4)
102900  -1  492  R2EA DK8SJ R-07 (x2)
103245  -1  492  EA1GTX DK8SJ JN47 (x4)
103600  +9  491  RN9N DK8SJ JN47 (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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