SV8DUU — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Greece Most frequent locator attributed to this token: KM39

Receiver-side FT8 activity involving SV8DUU, decoded by SO8OO in southeastern Poland. 409 FT8 messages attributed to this token as transmitter, on 20m, across 16 UTC dates in the available aggregate history. Observed between 2026-06-07 and 2026-07-31.

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 409 FT8 messages attributed to SV8DUU as the transmitting token by decoded message structure across 16 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (100%). Several six-hour UTC windows tied for the largest share (99%), so no unique busiest interval is claimed. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -8.6 dB.

Overview

409

Messages attributed

UTC dates decoded

Active 15-min windows

-8.6 dB

Estimated median S/N

Bands

20m · 409

First attributed message: 2026-06-07
Last attributed message: 2026-07-31 05:17 UTC

Observed FT8 message patterns

Attributed sample: 409 messages
Active dates: 16 UTC dates
Estimated median S/N: -8.6 dB
Estimated 10th-90th percentile: -20 to +1 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 88, moderate (-15 to -9 dB) 117, strong (≥ -8 dB) 204.

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 SV8DUU in decoded directed-looking exchanges:

RN4AQ · European Russia UA4AGU · European Russia 4Z4MU · Israel 7Q9BK · Malawi A61QQ · United Arab Emirates DG1KPC · Fed. Rep. of Germany ER3ZW · Moldova GM5WXA · Scotland I0QMY · Italy KB9ZM · United States KU1CW · United States OK1HEH · Czech Republic

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 SV8DUU

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: KM39 · 297 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,231 km (approx.)
Last such locator decoded: 2026-07-31 05:17 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	SV8DUU S/N	Counterpart	Counterpart S/N	Msgs	Capture
07-31 05:15	20m	-6 / -	OH5BM	- / -	2	Partial capture
07-31 05:13	20m	-7 / -	DK1MAX	- / -	3	Partial capture
07-31 05:11	20m	-5 / 0	GM5WXA	-11 / -5	5	✓ Full exchange observed
07-31 05:08	20m	-8 / -	OK1UG	- / -	2	Partial capture
07-31 05:06	20m	-6 / -	I0QMY	-1 / -17	5	✓ Closing observed
07-31 05:02	20m	-13 / -	9A3MRN	- / -	3	Partial capture
07-31 05:01	20m	-10 / -	DK1MAX	- / -	2	Partial capture
07-31 04:58	20m	-7 / -	LZ7VV	- / -	3	Partial capture
07-31 04:57	20m	-11 / -	GM5WXA	- / -	2	Partial capture
07-31 04:55	20m	-10 / -	S57NCP	- / -3	2	Partial capture
07-31 04:53	20m	-10 / -	LZ7VV	- / -	3	Partial capture
07-31 04:52	20m	-10 / -	9A3MRN	- / -	2	Partial capture
07-31 04:51	20m	-10 / -	SP5CJQ	- / -1	2	Partial capture
07-31 04:48	20m	-8 / -	LZ7VV	- / -	2	Partial capture
07-31 04:47	20m	-10 / -	W9JOY	- / -	2	Partial capture
07-31 04:44	20m	-10 / -	VE3PFW	- / -	2	Partial capture
07-31 04:43	20m	-6 / -	OH8JEP	- / -	3	Partial capture
07-31 04:41	20m	-6 / -	EA5JK	- / -	3	Partial capture
07-31 04:35	20m	-5 / -	DH2RL	- / -	3	Partial capture
07-31 04:33	20m	-6 / -	VE3PFW	- / -	3	Partial capture
07-31 04:32	20m	-4 / -	AC8MR	- / -	2	Partial capture
07-31 04:30	20m	+1 / -	OZ4MT	- / -	2	Partial capture
07-31 04:06	20m	- / -21	KU1CW	-8 / -	2	✓ Closing fragment
07-31 04:02	20m	- / -5	RD4A	0 / -	2	✓ Closing fragment
07-31 03:51	20m	- / -5	R7BN	+3 / -	3	✓ Closing fragment
07-30 05:13	20m	-3 / -	SP6AMK	- / -	3	Partial capture
07-30 05:12	20m	-5 / -	OK2FD	- / -	3	Partial capture
07-30 05:10	20m	-6 / -	<...>	- / -	2	Partial capture
07-30 05:08	20m	-5 / -	R3DQL	- / -6	3	✓ Closing fragment
07-30 05:06	20m	-5 / -	SP9KR	- / +2	4	✓ Closing fragment
07-30 05:02	20m	-8 / -	DL8WEM	- / -	3	Partial capture
07-30 05:00	20m	-6 / -	TN8GD	- / -13	3	✓ Closing fragment
07-30 04:57	20m	-8 / -	OE8AWQ	- / -	2	Partial capture
07-30 04:53	20m	-8 / -5	UA6YW	-3 / -	5	✓ Full exchange observed
07-30 04:51	20m	-6 / -	OE8AWQ	- / -	3	Partial capture
07-30 04:49	20m	-6 / -	HA1MHC	- / -2	2	Partial capture
07-30 04:47	20m	-5 / -	SQ7HJX	- / -	3	Partial capture
07-30 04:45	20m	-4 / -12	OK1HEH	-18 / -8	4	✓ Full exchange observed
07-30 04:43	20m	-2 / -	RG5G	- / -	2	✓ Closing fragment
07-27 04:17	20m	-16 / -	VE3PFW	- / -	2	Partial capture
07-27 04:12	20m	- / -10	SP8MO	-14 / -	2	✓ Closing fragment
07-27 04:09	20m	-20 / -	DJ2KP	- / -19	2	Partial capture
07-27 04:06	20m	-18 / -	R3AI	- / -17	3	✓ Closing fragment
07-26 04:02	20m	- / -4	PW8BR	-4 / -	2	✓ Closing fragment
07-25 04:15	20m	- / -14	UA1OIZ	+2 / -	2	✓ Closing fragment
07-16 05:06	20m	-14 / +9	SV6JHA	-8 / -6	3	✓ Full exchange observed
07-16 04:58	20m	-10 / -	IQ2AAH	- / -	2	Partial capture
07-16 04:51	20m	-12 / -	I7NOT	- / -	3	Partial capture
07-16 04:41	20m	-18 / -	RY3LAD	- / -7	2	✓ Closing fragment
07-16 04:37	20m	- / -7	RQ7O	+4 / -	2	✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

20m

UTC    dB Audio  Message
050830  -6 2530  OK1UG SV8DUU KM39
050930  -7 2531  I0QMY SV8DUU R-17
050945  -1 2529  SV8DUU I0QMY RR73
051100  -7 2531  GM5WXA SV8DUU KM39 (x2)
051145 -13  981  SV8DUU GM5WXA +00
051200  -5 2531  GM5WXA SV8DUU R-05
051215  -9  981  SV8DUU GM5WXA RR73
051300  -9 2532  HA8IB SV8DUU KM39
051330  -8 2532  DK1MAX SV8DUU KM39 (x3)
051530  -5 2521  OH5BM SV8DUU KM39 (x2)
051700  -6 2521  9A3MRN SV8DUU KM39

10m

UTC    dB Audio  Message
192730  -9 1551  SV8DUU RN4AQ -06 (x2)
193100 -10 2412  SV8DUU UA4AGU RR73 (x3)
193930  -7 2583  SV8DUU UB6C +02

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.

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