DH3UN — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Fed. Rep. of Germany Most frequent locator attributed to this token: JO31

Receiver-side FT8 activity involving DH3UN, decoded by SO8OO in southeastern Poland. 192 FT8 messages attributed to this token as transmitter, on 80m, 60m, 40m, 20m, across 12 UTC dates in the available aggregate history. Observed between 2026-08-16 and 2026-09-22.

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 192 FT8 messages attributed to DH3UN as the transmitting token by decoded message structure across 12 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (54%), followed by 80 m (41%) and 60 m (3%). Several six-hour UTC windows tied for the largest share (90%), so no unique busiest interval is claimed. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (85%); the estimated median was 0 dB.

Overview

192

Messages attributed

UTC dates decoded

Active 15-min windows

0 dB

Estimated median S/N

Bands

80m · 79 60m · 5 40m · 104 20m · 4

First attributed message: 2026-08-16
Last attributed message: 2026-09-22 20:17 UTC

Observed FT8 message patterns

Attributed sample: 192 messages
Active dates: 12 UTC dates
Estimated median S/N: 0 dB
Estimated 10th-90th percentile: -11 to +8 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 15, moderate (-15 to -9 dB) 14, strong (≥ -8 dB) 163.

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 DH3UN in decoded directed-looking exchanges:

DK3TNA · Fed. Rep. of Germany ×2 OV6ZM · Denmark ×2 ZL4TT · New Zealand 4X1UF · Israel DJ0BS · Fed. Rep. of Germany DL3BH · Fed. Rep. of Germany DL7ACA · Fed. Rep. of Germany EA8UP · Canary Islands EX7CQ · Kyrgyzstan F4BYA · France F5SJC · France HB9TOC · Switzerland

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 DH3UN

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 · 74 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,054 km (approx.)
Last such locator decoded: 2026-09-22 20:16 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	DH3UN S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-22 20:17	60m	- / -	9A4ZM	+2 / -	2	Partial capture
09-22 20:17	60m	- / -	G3UHU	-4 / -	4	Partial capture
09-22 20:16	60m	- / -	DL5DQZ	+3 / -	7	Partial capture
09-22 20:13	60m	-2 / 0	TF1EM	-14 / -9	6	✓ Full exchange observed
09-22 11:40	40m	-12 / -	OE5ABL	- / -13	2	✓ Closing fragment
09-22 11:34	40m	-19 / -1	OZ9FF	-12 / -	4	✓ Full exchange observed
09-22 11:28	40m	-18 / +1	DJ0BS	-12 / -	4	✓ Full exchange observed
09-21 19:54	40m	0 / -	M7EJN	- / -4	3	✓ Closing fragment
09-21 19:53	40m	-6 / -	RI1FJZ	- / -	2	Partial capture
09-21 19:51	40m	-8 / -	SP6TI	- / 0	2	✓ Closing fragment
09-21 19:50	40m	+2 / -	SP7TF	- / -3	2	✓ Closing fragment
09-21 19:49	40m	-3 / -11	DK3TNA	-6 / -	4	✓ Closing observed
09-21 19:47	40m	- / -	RD3FY	+4 / -	2	Partial capture
09-21 19:43	40m	+1 / -8	F4BYA	-7 / -9	4	✓ Full exchange observed
09-21 19:43	40m	- / -12	ON1DGN	-10 / -	4	Partial capture
09-18 07:37	40m	-8 / +9	OK3MB	-9 / -	4	✓ Closing observed
09-18 07:36	40m	-20 / -	OH6GAZ	- / -13	2	✓ Closing fragment
09-18 07:34	40m	-15 / -2	SO100PKP	-10 / -	2	Partial capture
09-18 07:26	40m	-6 / +4	OZ3AAF	-3 / -	6	✓ Full exchange observed
09-18 07:15	40m	-11 / -3	SP100PKP	-4 / +7	2	Partial capture
09-17 21:14	80m	-11 / -1	DG6VC	-18 / -	6	✓ Closing observed
09-17 21:09	80m	+2 / -	F5MYK	-23 / +6	4	✓ Closing observed
09-17 21:08	80m	+7 / -	OK2VCR	+3 / +3	7	✓ Full exchange observed
09-17 21:07	80m	+2 / -	DD1UN	- / -	2	✓ Closing fragment
09-17 21:06	80m	+2 / -	F1IQH	- / -11	2	✓ Closing fragment
09-17 21:04	80m	- / +1	DO9SAM	+8 / -	2	✓ Closing fragment
09-17 21:02	80m	0 / -	DK4BP	-24 / -9	3	✓ Closing observed
09-17 21:01	80m	-1 / -	CT2GQA	- / -5	3	✓ Closing fragment
09-17 21:01	80m	- / -	DF6WE	-15 / -	2	Partial capture
09-17 21:00	80m	- / -	UR4QWW	0 / -	6	Partial capture
09-17 18:52	80m	+8 / +2	DA6EE	+10 / -	3	✓ Closing observed
09-17 18:48	80m	+2 / +2	ON7USB	+2 / -	5	✓ Full exchange observed
09-11 21:06	80m	+8 / -	DL6EL	+7 / +6	3	✓ Closing observed
09-11 21:05	80m	+1 / +1	GW4HZA	-8 / -	4	✓ Full exchange observed
09-11 21:00	80m	-3 / -4	OE1TOA	+2 / +10	5	✓ Full exchange observed
09-11 20:56	80m	0 / -	Z62NS	-2 / -9	4	✓ Closing observed
09-10 21:24	40m	- / -	F4BJN	-13 / -	4	Partial capture
09-10 21:22	40m	0 / -	TF8KW	-18 / +7	5	✓ Closing observed
09-06 21:12	80m	+12 / -	5Z4VJ	- / -	7	Partial capture
09-06 21:08	80m	+2 / +1	OZ7CL	-5 / -	5	✓ Full exchange observed
09-06 21:05	80m	+7 / -	5Z4VJ	- / -	5	Partial capture
09-06 21:03	80m	+4 / -9	3Z100PKP	+4 / +5	3	Partial capture
09-06 20:57	40m	-3 / -9	OV6ZM	+6 / -	5	✓ Full exchange observed
09-06 20:52	40m	-7 / -	CN8NS	- / -	3	Partial capture
09-06 20:46	40m	+3 / -1	IU4DTV	+2 / +1	7	✓ Full exchange observed
09-06 20:43	40m	+5 / -15	4X1UF	-16 / -11	8	✓ Full exchange observed
09-06 20:36	40m	+5 / -	EX7CQ	- / +5	14	✓ Closing fragment
09-06 20:31	40m	+2 / -	SP7TF	- / +6	8	Partial capture
09-06 20:29	40m	+4 / -10	DL7ACA	+18 / +4	5	✓ Full exchange observed
09-06 20:29	40m	+4 / -4	RN6MA	+7 / +8	2	Partial capture

Recent FT8 messages decoded at SO8OO

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

60m

UTC    dB Audio  Message
201630 -14  933  DH3UN TF1EM +00
201645  +4  933  TF1EM DH3UN R-09
201700  -4  608  DH3UN G3UHU IO80
201715  -1  933  TF1EM DH3UN 73
201730  -4  608  DH3UN G3UHU IO80
201730  +4 1013  DH3UN DL5DQZ JO61
201730  +5  929  DH3UN 9A4ZM JN86
201800  -7  608  DH3UN G3UHU IO80
201800  +2 1013  DH3UN DL5DQZ JO61
201800  +0  929  DH3UN 9A4ZM JN86
201830  +0  607  DH3UN G3UHU IO80
201830  +3 1013  DH3UN DL5DQZ JO61 (x4)

40m

UTC    dB Audio  Message
195315  -7 2465  RI1FJZ DH3UN JO31 (x2)
195415  -4 2465  M7EJN DH3UN JO31 (x3)
112845 -13 1662  DH3UN DJ0BS +01
112900 -17 1662  DJ0BS DH3UN R+16
112915 -12 1662  DH3UN DJ0BS RR73
112930 -20 1662  DJ0BS DH3UN 73
113400 -20 2315  OZ9FF DH3UN JO31
113415 -10 2315  DH3UN OZ9FF -01
113430 -18 2315  OZ9FF DH3UN R+14
113445 -13 2315  DH3UN OZ9FF RR73
114000 -13 2315  OE5ABL DH3UN R-13 (x2)

80m

UTC    dB Audio  Message
211015 -23 2592  DH3UN F5MYK 73
211030  +7  965  OK2VCR DH3UN +03
211045  +7 1153  DH3UN OK2VCR R+17 (x2)
211230  +1  965  CQ DH3UN JO31
211300  -6  965  DM6MAR DH3UN -12
211415 -24  879  DH3UN DG6VC JN39 (x4)
211630 -11  965  DG6VC DH3UN RR73
211645 -16  878  DH3UN DG6VC 73
211700  -9  965  CQ DH3UN JO31 (x2)
070800 -18 1244  DL9DAJ DH3UN JO31

20m

UTC    dB Audio  Message
070830 -12  766  DH3UN M0KCB/P -14
071145  -9  766  M0KCB/P DH3UN R-04 (x3)
071415  -9  767  <EY35D> DH3UN R-05
071845 -15 2605  DH3UN ZL4TT RR73

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