DB4SZ — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Fed. Rep. of Germany Most frequent locator attributed to this token: JN48

Receiver-side FT8 activity involving DB4SZ, decoded by SO8OO in southeastern Poland. 346 FT8 messages attributed to this token as transmitter, on 60m, 40m, across 4 UTC dates in the available aggregate history. Observed between 2026-07-14 and 2026-09-19.

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 346 FT8 messages attributed to DB4SZ as the transmitting token by decoded message structure across 4 UTC dates in the available aggregate history. The largest monitored-band total was 60 m (99%), followed by 40 m (1%). Most decodes (52%) fell within the six-hour window 01:00-07:00 UTC. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -14 dB.

Overview

346

Messages attributed

UTC dates decoded

Active 15-min windows

-14 dB

Estimated median S/N

Bands

60m · 343 40m · 3

First attributed message: 2026-07-14
Last attributed message: 2026-09-19 22:44 UTC

Observed FT8 message patterns

Attributed sample: 346 messages
Active dates: 4 UTC dates
Estimated median S/N: -14 dB
Estimated 10th-90th percentile: -20 to -7 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 137, moderate (-15 to -9 dB) 160, strong (≥ -8 dB) 49.

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 DB4SZ in decoded directed-looking exchanges:

9A4ZM · Croatia ×2 CT1BFP · Portugal F1PPH · France RN6MA · European Russia DL7DL · Fed. Rep. of Germany DL9KM · Fed. Rep. of Germany 4O7CC · Montenegro DB6LL/P · Fed. Rep. of Germany DC6MY · Fed. Rep. of Germany DD6ZV · Fed. Rep. of Germany DF0AWG · Fed. Rep. of Germany DG4BZ · Fed. Rep. of Germany

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 DB4SZ

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: JN48 · 256 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 941 km (approx.)
Last such locator decoded: 2026-09-19 22:44 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	DB4SZ S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-19 22:38	60m	- / -	OK1BN	+13 / -	7	Partial capture
09-19 22:35	60m	-10 / -	II8IHBC	- / -13	2	Partial capture
09-19 22:33	60m	-10 / -8	DL6RS	-3 / -7	5	✓ Full exchange observed
09-19 22:31	60m	-9 / +1	DL5ASK	-12 / -5	4	✓ Full exchange observed
09-19 22:30	60m	-10 / +5	DK3ME	-7 / -7	4	✓ Full exchange observed
09-19 22:29	60m	- / -	OK1BN	+13 / -	7	Partial capture
09-19 22:29	60m	-9 / -1	9A4ZM	-1 / -	4	✓ Closing observed
09-19 22:29	60m	- / -1	F1PBZ	0 / -	4	Partial capture
09-19 22:27	60m	-9 / -15	4O7CC	-8 / -13	5	✓ Full exchange observed
09-19 22:24	60m	-4 / -18	LZ2VQ	+10 / -4	6	✓ Full exchange observed
09-19 22:23	60m	- / -12	PE1NPS	+6 / -	2	Partial capture
09-19 22:23	60m	- / -12	DL5DQZ	+6 / -	2	✓ Closing fragment
09-19 22:22	60m	-12 / -	DG4BZ	-10 / -	8	✓ Closing observed
09-19 22:21	60m	-8 / +7	DH0BRO	0 / +8	2	Partial capture
09-04 06:39	60m	- / -	PE1NPS	-14 / -	3	Partial capture
09-04 06:31	60m	- / -17	OE6TNO	-8 / -	2	✓ Closing fragment
09-04 06:18	60m	- / -	DL5RDP	-4 / -	2	Partial capture
09-04 06:14	60m	- / +8	HB9ACA	-22 / -	2	✓ Closing fragment
09-04 06:00	60m	-15 / -	DA1GT	- / -15	3	Partial capture
09-04 05:55	60m	-15 / -	DA1GT	- / -15	3	Partial capture
09-04 05:52	60m	-12 / -2	OZ1KZX	-4 / -	4	✓ Closing observed
09-04 05:51	60m	-16 / -	EG1PPE	- / -8	2	✓ Closing fragment
09-04 05:38	60m	-18 / -	IW9FRA	- / -	14	Partial capture
09-04 05:33	60m	-22 / -	IW9FRA	- / -	2	Partial capture
09-04 05:20	60m	-18 / -	SM1TDE	- / -	2	Partial capture
09-04 05:14	60m	- / -4	OM3ZAS	-5 / -	3	Partial capture
09-04 05:11	60m	-12 / -	MM0HVU	- / -	6	Partial capture
09-04 05:04	60m	-11 / -	MM0HVU	- / -	7	Partial capture
09-04 05:02	60m	-16 / -8	DK6WH	-2 / -17	4	✓ Full exchange observed
09-04 04:58	60m	- / -6	G0BLB	+3 / -	2	✓ Closing fragment
09-04 04:45	60m	-19 / -	DL1UDO	- / -	8	Partial capture
09-04 04:35	60m	-11 / -22	M1FJG	-9 / +7	4	✓ Full exchange observed
09-04 04:13	60m	-3 / -13	G8OO	+2 / +6	5	✓ Full exchange observed
09-04 04:06	60m	-15 / -10	F5OYA/P	-16 / +1	5	✓ Full exchange observed
09-04 03:41	60m	-12 / -14	G0AZH	-9 / -1	4	✓ Full exchange observed
09-04 03:30	60m	-16 / -12	ER3UA	-12 / -3	4	✓ Full exchange observed
09-04 03:27	60m	-13 / -18	W4CHA	-16 / -	2	✓ Closing observed
09-04 03:27	60m	-18 / -	DL1UDO	- / -	2	Partial capture
09-04 03:13	60m	-16 / -	F5MXH	-12 / +3	4	✓ Closing observed
09-04 03:11	60m	-17 / +5	OM5JG	-15 / +9	4	✓ Full exchange observed
09-04 02:56	60m	-16 / -	W1BS	- / -	23	Partial capture
09-04 02:54	60m	-16 / -15	EW6BZ	-6 / +3	5	✓ Full exchange observed
09-04 02:40	60m	-16 / -	KD4IE	- / -	23	Partial capture
09-04 02:14	60m	-20 / -	W4KWS	- / -	22	Partial capture
09-04 02:00	60m	-15 / -	HA0AA	- / -9	3	✓ Closing fragment
09-04 01:58	60m	-12 / -	OE1AVO	- / -7	3	✓ Closing fragment
09-04 01:51	60m	-10 / -	OO0O	- / -12	6	✓ Closing fragment
09-04 01:50	60m	-10 / -19	DC6MY	+3 / -12	8	✓ Full exchange observed
09-04 01:45	60m	- / -	PE1NPS	+1 / -	4	Partial capture
09-04 01:44	60m	-16 / -9	OZ7FOC	-8 / -	4	✓ Closing observed

Recent FT8 messages decoded at SO8OO

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

60m

UTC    dB Audio  Message
223945 -12  985  CQ DB4SZ JN48
224000 +15 2252  DB4SZ OK1BN JO70
224015 -15  985  CQ DB4SZ JN48
224030 +14 2252  DB4SZ OK1BN JO70
224045 -13  985  CQ DB4SZ JN48
224100 +14 2252  DB4SZ OK1BN JO70
224115 -11  985  CQ DB4SZ JN48
224130  +6 2252  DB4SZ OK1BN JO70
224145 -16  985  CQ DB4SZ JN48
224200  +0 2471  DB4SZ F5HNQ IN98
224215 -16  986  CQ DB4SZ JN48 (x5)

40m

UTC    dB Audio  Message
101100  -9 2077  DB4SZ DL9KM JN68
101130 -13  487  DB4SZ PE9JAN R-03
101130  -8 2077  DB4SZ DL9KM JN68 (x4)
101400  -9 1219  DB4SZ OK2VCR JN89 (x2)
101730 -24 1634  DB4SZ DF2JK JO30
102000 -14 1581  DB4SZ DL7DL JO62 (x6)

20m

UTC    dB Audio  Message
161215 -13  814  DB4SZ PD3LKN JO22 (x2)
170630  -7  604  DB4SZ RN6MA -09 (x2)
184645  -7 1328  DB4SZ F1PPH R-07 (x2)
184945  -8 1327  DB4SZ CT1BFP IM59 (x6)
135415 -21 1466  DB4SZ GJ0KYZ -15
135645 -24 1764  DB4SZ F5IXN JN23 (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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