DB4SZ — 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: JN48

Receiver-side FT8 activity involving DB4SZ, decoded by SO8OO in southeastern Poland. 457 FT8 messages attributed to this token as transmitter, on 60m, 40m, across 8 UTC dates in the available aggregate history. Observed between 2026-07-14 and 2026-10-13.

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 DB4SZ as the transmitting token by decoded message structure across 8 UTC dates in the available aggregate history. The largest monitored-band total was 60 m (77%), followed by 40 m (23%). Most decodes (57%) 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 -13 dB.

Overview

457

Messages attributed

UTC dates decoded

Active 15-min windows

-13 dB

Estimated median S/N

Bands

60m · 353 40m · 104

First attributed message: 2026-07-14
Last attributed message: 2026-10-13 17:03 UTC

Observed FT8 message patterns

Attributed sample: 457 messages
Active dates: 8 UTC dates
Estimated median S/N: -13 dB
Estimated 10th-90th percentile: -19 to -5 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 142, moderate (-15 to -9 dB) 212, strong (≥ -8 dB) 103.

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 CT3MD · Madeira Islands DK3XU · Fed. Rep. of Germany DL7DL · Fed. Rep. of Germany DL9KM · Fed. Rep. of Germany EA3FP · Spain EA5HM · Spain EK1KE · Armenia ES2DR · Estonia HK3AQJ · Colombia KA1MXL · United States N4DWD · United States

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 · 327 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 941 km (approx.)
Last such locator decoded: 2026-10-13 17:03 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
10-25 02:06	40m	- / -11	ON1JP	-24 / -	2	Partial capture
10-13 16:57	40m	-8 / -	PA0KPJ	- / -	11	Partial capture
10-13 16:49	40m	-8 / -	PA0KPJ	- / -	7	Partial capture
10-06 03:54	40m	- / -	EA7NK	-11 / -	4	Partial capture
10-06 03:50	40m	-1 / -	DK3XU	- / +4	5	✓ Closing fragment
10-06 03:50	40m	- / -	RZ4FWA	-12 / -	2	Partial capture
10-06 03:47	40m	-6 / -	N4MMR	- / -6	2	✓ Closing fragment
10-06 03:42	40m	-15 / -	OA4ENG	- / -	2	Partial capture
10-06 03:38	40m	-11 / -	ES2DR	-13 / -	2	✓ Closing observed
10-06 03:32	40m	-12 / -	OA4ENG	- / -	3	Partial capture
10-06 03:25	40m	-6 / -	TT1GD	- / -24	3	Partial capture
10-06 03:21	40m	- / -	F4BYA	+6 / -	4	Partial capture
10-06 03:13	40m	-3 / -	KC4WQ	- / -20	7	Partial capture
10-06 03:10	40m	-13 / -	TI5GAX	- / -	3	Partial capture
10-06 03:01	40m	-11 / -	EK1KE	- / -16	5	✓ Closing fragment
10-06 02:57	40m	-10 / -	WP4TUN	- / -	2	Partial capture
10-06 02:54	40m	-12 / -	EA5HM	-10 / -3	4	✓ Closing observed
10-06 02:53	40m	-11 / -	N4DWD	- / -11	4	✓ Closing fragment
10-06 02:47	40m	-8 / -15	CT3MD	-10 / -	4	✓ Closing observed
10-06 02:45	40m	-8 / -	KA1MXL	- / -19	4	✓ Closing fragment
09-22 19:55	40m	- / -24	EA3FP	-8 / -	2	✓ Closing fragment
09-22 19:46	40m	-10 / -	2I0WMN	- / -13	2	Partial capture
09-21 23:47	60m	-12 / -	W8GEX	- / -	2	Partial capture
09-21 23:43	60m	-11 / -11	OH1LA	-9 / -1	5	✓ Full exchange observed
09-21 23:40	60m	-8 / -3	LA3VEA	-13 / -8	9	✓ Full exchange observed
09-21 23:33	40m	- / -24	TA3NK	-8 / -	3	✓ Closing fragment
09-21 23:31	40m	- / -	RZ4FWA	-8 / -	2	Partial capture
09-21 23:31	40m	- / -6	VE1JBC	-8 / -	3	✓ Closing fragment
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

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
165300  -8  762  PA0KPJ DB4SZ JN48 (x13)
020615 -23 1883  DB4SZ ON1JP -11 (x2)

60m

UTC    dB Audio  Message
234115  -8 1931  LA3VEA DB4SZ RR73
234130  -9 1815  DB4SZ LA3VEA R-03
234145  -9 1931  LA3VEA DB4SZ RR73
234200 -11 1816  DB4SZ LA3VEA R-03
234215  -8 1931  LA3VEA DB4SZ RR73
234230 -14 1816  DB4SZ LA3VEA 73
234300  -5 1931  DB4SZ OH1LA KP01
234315 -11 1931  OH1LA DB4SZ -01
234330  -6 1930  DB4SZ OH1LA R-11 (x3)
234545 -22 1930  CQ DB4SZ JN48                         a1
234745 -13 1931  W8GEX DB4SZ JN48 (x2)
234915 -13 1028  CT3IQ DB4SZ JN48

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

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