DB4JW — 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: JO31

Receiver-side FT8 activity involving DB4JW, decoded by SO8OO in southeastern Poland. 55 FT8 messages attributed to this token as transmitter, on 80m, 60m, 20m, 10m, across 12 UTC dates in the available aggregate history. Observed between 2026-08-07 and 2026-10-22.

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 55 FT8 messages attributed to DB4JW as the transmitting token by decoded message structure across 12 UTC dates in the available aggregate history. The largest monitored-band total was 60 m (93%), followed by 20 m (4%) and 80 m (2%). Most decodes (96%) fell within the six-hour window 12:00-18:00 UTC. Most successfully decoded messages attributed to this token fell in SO8OO's weak S/N range (69%); the estimated median was -17 dB.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-17 dB

Estimated median S/N

Bands

80m · 1 60m · 51 20m · 2 10m · 1

First attributed message: 2026-08-07
Last attributed message: 2026-10-22 15:48 UTC

Observed FT8 message patterns

Attributed sample: 55 messages
Active dates: 12 UTC dates
Estimated median S/N: -17 dB
Estimated 10th-90th percentile: -21 to -8 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 38, moderate (-15 to -9 dB) 11, 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.

Frequent counterpart tokens observed at SO8OO

Tokens most often paired with DB4JW in decoded directed-looking exchanges:

DL6EL · Fed. Rep. of Germany DG9NAY · Fed. Rep. of Germany DH3KR · Fed. Rep. of Germany DK2CC · Fed. Rep. of Germany DK9FE · Fed. Rep. of Germany DL4YDR · Fed. Rep. of Germany DL5RDP · Fed. Rep. of Germany DL6MHT · Fed. Rep. of Germany DL6MRM · Fed. Rep. of Germany EW2RA · Belarus EW6BZ · Belarus F5CIW · France

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 DB4JW

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: JO31 · 23 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,054 km (approx.)
Last such locator decoded: 2026-10-18 16:30 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	DB4JW S/N	Counterpart	Counterpart S/N	Msgs	Capture
10-22 15:48	60m	- / -8	HA5CPN	-10 / -	2	Partial capture
10-22 15:47	60m	-18 / -9	OZ7FOC	-18 / -	3	✓ Full exchange observed
10-22 15:44	60m	-19 / -7	DL5RDP	+15 / +4	5	✓ Full exchange observed
10-22 15:42	60m	- / -16	SP4NKJ	0 / -	2	✓ Closing fragment
10-22 15:40	60m	- / -2	DK2CC	-17 / -	3	✓ Closing fragment
10-22 15:38	60m	-20 / -1	DL4YDR	-15 / +1	5	✓ Full exchange observed
10-18 16:40	60m	-17 / -10	SQ6WA	-10 / +2	3	✓ Full exchange observed
10-18 16:30	60m	-18 / -	SQ6WA	- / -9	2	Partial capture
10-15 06:37	60m	- / -6	OT4N	-20 / -	2	✓ Closing fragment
10-15 06:27	60m	- / -	DL9KM	-14 / -	6	Partial capture
10-14 16:00	60m	-22 / -	DL6MHT	-16 / -10	3	✓ Closing observed
10-14 15:58	60m	-21 / -18	DL3HQL	-19 / -10	2	Partial capture
10-14 15:45	60m	- / -24	LZ2VQ	-7 / -	3	✓ Closing fragment
10-14 15:43	60m	-22 / -	G0YYZ	- / +5	2	Partial capture
10-14 15:41	60m	-6 / -3	DK9FE	+4 / -	5	✓ Full exchange observed
10-12 17:23	60m	-11 / -8	DL6MRM	-8 / -1	4	✓ Full exchange observed
10-12 17:16	60m	-13 / -2	IV3DSG	+5 / +8	5	✓ Full exchange observed
10-12 17:16	60m	-15 / -10	PA7ZZ	+3 / +1	4	✓ Full exchange observed
10-12 17:16	60m	-20 / +8	PE1PEO	-8 / -	8	✓ Closing observed
10-12 17:14	60m	-17 / +1	DL9NCR	-2 / -	3	Partial capture
10-12 16:58	60m	-16 / -13	EW6BZ	-6 / -1	5	✓ Full exchange observed
10-12 16:53	60m	-18 / 0	F5OWT	-3 / +10	5	✓ Full exchange observed
10-12 16:49	60m	-16 / -	M1FCV	- / -9	3	✓ Closing fragment
10-12 16:47	60m	- / -13	EW2RA	+13 / -	2	✓ Closing fragment
10-07 16:06	60m	-20 / -	F5PBG	- / -3	2	✓ Closing fragment
10-07 16:04	60m	-18 / -13	M0GDX	-16 / 0	3	Partial capture
10-06 15:43	80m	- / -6	DO2KMB	-7 / -	2	✓ Closing fragment
09-30 16:06	60m	-20 / -	G3UHU	-16 / +3	3	✓ Closing observed
09-15 17:06	60m	- / -19	YO4NT	+4 / -	2	✓ Closing fragment
09-15 17:03	60m	- / -20	DG9NAY	-1 / -	3	✓ Closing fragment
09-13 12:42	40m	- / -1	DL6EL	-6 / -	4	✓ Closing fragment
08-31 11:59	20m	-7 / -9	9A170NT	-9 / -	3	Partial capture
08-25 17:25	60m	-11 / -23	HF5A	+9 / -13	4	✓ Full exchange observed
08-25 17:25	60m	- / -	OH/SM5MRW	-20 / -	3	Partial capture
08-25 17:21	60m	- / -	HF5A	+9 / -	3	Partial capture
08-09 15:31	60m	- / +10	DH3KR	-19 / -	3	✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

60m

UTC    dB Audio  Message
154045 -19 1417  DB4JW DK2CC JO63 (x3)
154245  +1 1132  DB4JW SP4NKJ -16 (x2)
154430 +12 3004  DB4JW DL5RDP -07 (x2)
154515 -21 1515  DL5RDP DB4JW R+04
154530 +14 3004  DB4JW DL5RDP RR73
154545 -17 1515  DL5RDP DB4JW 73
154715 -18 1245  DB4JW OZ7FOC -09
154730 -18 1515  OZ7FOC DB4JW R+13 (x2)
154815  -5 1516  DB4JW HA5CPN JN87 (x2)

160m

UTC    dB Audio  Message
162615 -20 2068  DB4JW F6DHD -13

80m

UTC    dB Audio  Message
154345  -6 1337  DB4JW DO2KMB -06 (x2)
160230 -20 1738  DO1LKG DB4JW JO31

40m

UTC    dB Audio  Message
124215  -3  723  DB4JW DL6EL JN57 (x4)

20m

UTC    dB Audio  Message
115930  -8 2796  9A170NT DB4JW JO31 (x2)
120145  -9 2795  DB4JW 9A170NT -09

10m

UTC    dB Audio  Message
095545  -9 2808  <...> DB4JW JO31

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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