WD0U/DU3 — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Philippines

Receiver-side FT8 activity involving WD0U/DU3, decoded by SO8OO in southeastern Poland. 14 FT8 messages attributed to this token as transmitter, on 40m, across 2 UTC dates in the available aggregate history. Observed between 2026-09-15 and 2026-09-16.

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 14 FT8 messages attributed to WD0U/DU3 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 (100%). In this small sample, the estimated median decoder S/N was -14 dB; no usual signal pattern is inferred.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-14 dB

Estimated median S/N

Bands

40m · 14

First attributed message: 2026-09-15
Last attributed message: 2026-09-16 22:15 UTC

Observed FT8 message patterns

Attributed sample: 14 messages
Active dates: 2 UTC dates
Estimated median S/N: -14 dB
S/N percentile sample: Too small
Recurring-pattern threshold: Not met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 2, moderate (-15 to -9 dB) 12, strong (≥ -8 dB) 0.

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 WD0U/DU3 in decoded directed-looking exchanges:

Z335MK · North Macedonia ×3

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	WD0U/DU3 S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-17 19:24	40m	- / -11	F4ESO	-2 / -	3	Partial capture
09-17 11:50	40m	- / -	DJ4FAN	-21 / -	3	Partial capture
09-17 07:30	40m	- / -	YO3WST	-18 / -	2	Partial capture
09-15 19:08	40m	-13 / -	SN1A	- / -4	3	Partial capture
09-15 19:06	40m	-14 / -2	F8MRQ	-5 / -8	2	Partial capture
09-15 19:05	40m	-12 / -	DL2HAD	- / -8	2	Partial capture
09-15 19:03	40m	-14 / -	F8MRQ	- / -6	2	Partial capture
09-15 19:00	40m	- / +2	PG5FRL	-11 / -	3	Partial capture
09-15 18:51	40m	- / -	Z335MK	-16 / -	2	✓ Closing fragment
09-15 18:40	40m	- / -	ON7KY	0 / -	2	Partial capture
09-15 09:13	40m	- / -	S53AK	-2 / -	4	Partial capture
09-15 06:02	40m	- / -	DL2YBG	-6 / -	3	Partial capture
09-15 05:42	40m	- / +6	DL2YBG	-5 / -	2	Partial capture
09-15 02:03	40m	- / -	TA2EE	-22 / -	5	Partial capture
09-14 20:38	40m	- / -	R5BM	-3 / -	4	Partial capture
09-14 19:09	40m	- / -	<...>	+6 / -	2	✓ Closing fragment
07-24 22:39	20m	- / -14	IV3FHI	-5 / -	9	Partial capture

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
190745  -5 1251  WD0U/DU3 F8MRQ R-02
190800 -14 1252  SN1A WD0U/DU3 -04 (x3)
213415  +7  324  WD0U/DU3 <...> 73 (x2)
221515 -12 1913  RG8U WD0U/DU3 -09
073045 -21 1913  WD0U/DU3 YO3WST KN34 (x2)
115045 -22 1914  WD0U/DU3 DJ4FAN JN49 (x3)
192445  -4 1910  WD0U/DU3 F4ESO JN39 (x3)

20m

UTC    dB Audio  Message
223245 -14 2538  WD0U/DU3 <...> 73
223930  -3 2525  WD0U/DU3 IV3FHI R-14 (x9)

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.

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