DB4JW/QRP — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Fed. Rep. of Germany

Receiver-side FT8 activity involving DB4JW/QRP, decoded by SO8OO in southeastern Poland. 46 FT8 messages attributed to this token as transmitter, on 80m, 60m, 40m, across 2 UTC dates in the available aggregate history. Observed between 2026-06-30 and 2026-09-27.

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 46 FT8 messages attributed to DB4JW/QRP as the transmitting token by decoded message structure across 2 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (96%), followed by 80 m (2%) and 60 m (2%). In this small sample, the estimated median decoder S/N was -1 dB; no usual signal pattern is inferred.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-1 dB

Estimated median S/N

Bands

80m · 1 60m · 1 40m · 44

First attributed message: 2026-06-30
Last attributed message: 2026-09-27 21:10 UTC

Observed FT8 message patterns

Attributed sample: 46 messages
Active dates: 2 UTC dates
Estimated median S/N: -1 dB
Estimated 10th-90th percentile: -9 to +7 dB
Recurring-pattern threshold: Not met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 2, moderate (-15 to -9 dB) 3, strong (≥ -8 dB) 41.

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. The sample does not meet the threshold for a recurring time or signal-pattern claim (20 attributed messages, three UTC dates and five distinct 15-minute windows).

Frequent counterpart tokens observed at SO8OO

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

SX48JM · Greece ×9 UA9SY · Asiatic Russia

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/QRP S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-27 21:09	40m	0 / -5	IU1FNJ	-12 / -16	4	Partial capture
09-27 21:07	40m	-2 / -	RN0CD	- / -16	2	Partial capture
09-27 21:04	40m	-8 / -	SX48JM	-5 / -	2	✓ Closing observed
09-27 21:03	40m	-7 / -5	PD2RAL	-8 / -16	4	Partial capture
09-27 20:57	40m	-8 / -	JH4BYS	- / -19	2	Partial capture
09-27 20:51	40m	-5 / -9	UA9SY	-6 / -9	4	✓ Full exchange observed
09-27 20:51	40m	- / -	SX48JM	0 / -	3	✓ Closing fragment
09-27 20:45	40m	0 / -	JH4BYS	- / -18	2	Partial capture
09-27 20:37	40m	+4 / -14	EB4DMH	-9 / -20	4	Partial capture
09-27 20:34	40m	-9 / -	SX48JM	+4 / -	5	✓ Closing observed
09-27 20:32	40m	- / -1	GJ0KYZ	+1 / -	3	Partial capture
09-27 20:29	40m	- / -	PH9OY	-1 / -	5	Partial capture
09-27 20:20	40m	+8 / -	IU5JAE	- / -14	2	Partial capture
09-27 20:18	40m	+6 / -	DH5RUM	- / -16	2	Partial capture
09-27 20:17	40m	+6 / -	UR5QQ	- / -19	2	Partial capture
09-27 20:08	40m	- / -	SX48JM	-6 / -	2	✓ Closing fragment
09-27 20:07	40m	-2 / -	VK6IR	- / -17	2	Partial capture
09-27 20:03	40m	-4 / -	SX48JM	-4 / -	2	✓ Closing observed
09-27 20:01	40m	- / -	S56UVB	+2 / -	4	Partial capture
09-27 19:59	40m	+1 / -	DK6AH	- / -15	2	Partial capture
09-27 19:57	40m	+5 / -	SP7BCA	-12 / +3	5	Partial capture
09-27 19:54	40m	+5 / -	SQ7TX	- / -23	2	Partial capture
09-27 19:23	40m	- / -	SX48JM	+6 / -	3	✓ Closing fragment
08-24 11:51	20m	- / -10	YO9PH	+6 / -	2	Partial capture
08-22 11:06	10m	- / -	<...>	-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
205700  -9  507  JH4BYS DB4JW/QRP -19 (x2)
210315  -8  507  DB4JW/QRP PD2RAL -05 (x3)
210430  -7  507  PD2RAL DB4JW/QRP R-16
210445  -8  507  SX48JM DB4JW/QRP RR73
210500  -5  507  DB4JW/QRP SX48JM RR73
210700  -2  507  RN0CD DB4JW/QRP -16 (x2)
210945 -13  508  DB4JW/QRP IU1FNJ JN44 (x2)
211030  +0  507  IU1FNJ DB4JW/QRP -16
211045 -13  508  DB4JW/QRP IU1FNJ R-05
211100  +2  507  DB4JW/QRP SX48JM RR73

60m

UTC    dB Audio  Message
165945 -17 1543  DB4JW/QRP <...> 73
170030 -18 1543  DB4JW/QRP DK5WL JN39
170215 -15 1031  DB4JW/QRP <...> 73 (x3)

20m

UTC    dB Audio  Message
114345 -13 1970  DB4JW/QRP <...> RR73
114445 -17 1965  DB4JW/QRP UR5VPR KN68
115145  +4 1970  DB4JW/QRP YO9PH -10 (x2)

10m

UTC    dB Audio  Message
110615  -9 1273  DB4JW/QRP <...> RR73 (x2)

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