DD3JN — 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 DD3JN, decoded by SO8OO in southeastern Poland. 96 FT8 messages attributed to this token as transmitter, on 40m, 20m, across 12 UTC dates in the available aggregate history. Observed between 2026-07-14 and 2026-09-17.

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 96 FT8 messages attributed to DD3JN as the transmitting token by decoded message structure across 12 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (66%), followed by 40 m (34%). Most decodes (67%) fell within the six-hour window 13:00-19:00 UTC. Most successfully decoded messages attributed to this token fell in SO8OO's weak S/N range (79%); the estimated median was -20 dB.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-20 dB

Estimated median S/N

Bands

40m · 33 20m · 63

First attributed message: 2026-07-14
Last attributed message: 2026-09-17 10:31 UTC

Observed FT8 message patterns

Attributed sample: 96 messages
Active dates: 12 UTC dates
Estimated median S/N: -20 dB
Estimated 10th-90th percentile: -24 to -14 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 76, moderate (-15 to -9 dB) 19, strong (≥ -8 dB) 1.

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 DD3JN in decoded directed-looking exchanges:

DL7UKM · Fed. Rep. of Germany ×2 5B4AMX · Cyprus DL6EL · Fed. Rep. of Germany E70SZ · Bosnia-Herzegovina F1PBZ · France F4MGP · France G7MLL · England II1WWA · Italy IW2DNI · Italy KB3Z · United States OE7MAH · Austria OZ5AGJ · Denmark

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 DD3JN

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 · 51 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,054 km (approx.)
Last such locator decoded: 2026-09-17 10:29 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	DD3JN S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-17 10:25	40m	- / -6	HA7TM	+2 / -	3	✓ Closing fragment
09-17 10:19	40m	-19 / -	DL1FAM	-16 / +5	5	✓ Full exchange observed
09-17 10:18	40m	- / -	DK7UY	-10 / -	3	✓ Closing fragment
09-17 10:18	40m	- / -	DL9KM	-6 / -	7	Partial capture
09-17 10:17	40m	-21 / -	DJ3NJ	-12 / -	4	✓ Closing observed
09-17 10:14	40m	- / -	HA7TM	+3 / -	3	Partial capture
09-15 13:45	40m	-24 / -	DH3KR	- / +8	2	✓ Closing fragment
09-15 13:41	40m	-22 / +4	DJ0MAB	-22 / -	4	✓ Full exchange observed
09-15 13:40	40m	-24 / +2	DL6CMF	-13 / -	4	✓ Full exchange observed
09-15 13:38	40m	-20 / +6	DL7UKM	0 / -	6	✓ Full exchange observed
09-15 13:37	40m	-21 / -	DK8HC	-9 / -	2	Partial capture
09-15 13:34	40m	-20 / -	PD3CFG	- / +5	2	✓ Closing fragment
09-15 13:33	40m	-24 / -	G1HJW	- / +10	2	✓ Closing fragment
09-15 13:33	40m	- / +6	DA1ST	-14 / -	2	✓ Closing fragment
09-14 10:29	40m	- / -	DK2SW	-14 / -	2	Partial capture
08-24 08:30	20m	- / -16	R2SN	+12 / -	2	✓ Closing fragment
08-24 08:26	20m	- / -4	OE7MAH	-7 / -	3	✓ Closing fragment
08-06 08:53	20m	- / -	5B4AMX	-17 / -	2	✓ Closing fragment
07-30 14:45	20m	-14 / -	UA1AOF	- / -12	5	✓ Closing fragment
07-30 14:40	20m	-14 / -	F1PBZ	- / -1	2	✓ Closing fragment
07-29 08:57	20m	-24 / -	K9STL	- / -	3	Partial capture
07-29 08:49	20m	-22 / -	VK2JJM	- / -	3	Partial capture
07-29 08:47	20m	-22 / -	K9STL	- / -	4	Partial capture
07-27 13:51	20m	-20 / -	ON7KEI	- / -23	2	Partial capture
07-27 13:48	20m	- / -	DF3IS	+2 / -	7	Partial capture
07-27 13:46	20m	-23 / -	HB9ITP/P	- / +3	2	Partial capture
07-27 13:42	20m	-20 / -	R0AX	- / -9	2	✓ Closing fragment
07-27 13:38	20m	-24 / -	K8NN	- / -	3	Partial capture
07-27 13:38	20m	- / +2	GJ0KYZ	-8 / -	3	Partial capture
07-27 13:36	20m	-21 / -	G7MLL	- / -2	4	✓ Closing fragment
07-27 13:34	20m	- / -	F1PPH	-18 / -	2	Partial capture
07-24 18:24	20m	-15 / -	A61CK	- / -	2	Partial capture
07-24 18:21	20m	-18 / -	9J2FI	- / -	2	Partial capture
07-24 18:08	20m	- / -8	F4MGP	-8 / -	6	✓ Closing fragment
07-24 17:21	40m	- / -13	RN6MA	-14 / -	2	✓ Closing fragment
07-24 17:18	40m	-16 / -	OZ4SOP	-6 / -	4	✓ Closing observed
07-24 17:15	40m	- / -8	HG8LXL	-12 / -	3	✓ Closing fragment
07-24 17:13	40m	- / -6	IQ4JO	-5 / -	3	Partial capture
07-24 17:11	40m	-18 / -12	HG8LXL	-11 / +2	6	Partial capture
07-14 07:44	20m	-22 / -	KB3Z	- / -20	3	✓ Closing fragment
07-14 07:43	20m	- / -3	E70SZ	-13 / -	3	✓ Closing fragment
07-14 07:38	20m	-14 / -5	IW2DNI	-13 / +6	4	✓ Full exchange observed
07-07 08:35	20m	- / -	OZ5AGJ	-19 / -	2	✓ Closing fragment
07-02 10:21	20m	- / -	DL6EL	-7 / -	4	✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
101945 -19 1726  DL1FAM DD3JN +05
102000 -12 1489  DD3JN DL9KM JN68
102000 -16 1616  DD3JN DL1FAM R+13
102030  -2 1489  DD3JN DL9KM JN68
102030 -12 1616  DD3JN DL1FAM 73
102100  -7 1489  DD3JN DL9KM JN68 (x2)
102130 -10  457  DD3JN DK7UY 73
102500  +2 1726  DD3JN HA7TM JN97 (x3)
102830 -24 1846  CQ DD3JN JO31                         a1 (x3)
103130 -24 1845  DL4GI DD3JN +01

20m

UTC    dB Audio  Message
085400 -16 1937  DD3JN 5B4AMX RR73
090530 -15 2366  KE2UK DD3JN JO31
091115 -24 1756  DD3JN F4HSB JN37
093545 -17 1111  CQ DD3JN JO31
095245 -24 1627  5N0YEN DD3JN JO31
093130 -21 2353  AC4BV DD3JN JO31
082615  -6 2908  DD3JN OE7MAH -04 (x3)
082900 -15 1177  YO6LM DD3JN RR73
082930 -17 1177  CQ DD3JN JO31 (x3)
083045 +12 1178  DD3JN R2SN -16 (x2)

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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