TK5NJ — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: Corsica Most frequent locator attributed to this token: JN41

Receiver-side FT8 activity involving TK5NJ, decoded by SO8OO in southeastern Poland. 421 FT8 messages attributed to this token as transmitter, on 40m, 20m, across 37 UTC dates in the available aggregate history. Observed between 2026-06-06 and 2026-09-21.

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 421 FT8 messages attributed to TK5NJ as the transmitting token by decoded message structure across 37 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (69%), followed by 20 m (31%). Several six-hour UTC windows tied for the largest share (59%), so no unique busiest interval is claimed. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -15.9 dB.

Overview

421

Messages attributed

UTC dates decoded

Active 15-min windows

-15.9 dB

Estimated median S/N

Bands

40m · 289 20m · 132

First attributed message: 2026-06-06
Last attributed message: 2026-09-21 14:37 UTC

Observed FT8 message patterns

Attributed sample: 421 messages
Active dates: 37 UTC dates
Estimated median S/N: -15.9 dB
Estimated 10th-90th percentile: -21 to -7 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 212, moderate (-15 to -9 dB) 147, strong (≥ -8 dB) 62.

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 TK5NJ in decoded directed-looking exchanges:

F1PBZ · France ×3 DF6QN · Fed. Rep. of Germany ×2 IZ4AIF · Italy ×2 S58N · Slovenia ×2 TA1MB · European Turkey ×2 3A2MW · Monaco 7Z1BM · Saudi Arabia 9A5AZK · Croatia 9A5SPC · Croatia DB2VS · Fed. Rep. of Germany DF1SD · Fed. Rep. of Germany DF8MH · Fed. Rep. of Germany

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 TK5NJ

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: JN41 · 127 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,363 km (approx.)
Last such locator decoded: 2026-09-21 14:37 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	TK5NJ S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-21 14:37	40m	- / -	OK3BR	-6 / -	3	Partial capture
09-21 14:36	40m	- / -	SP3RBQ	-2 / -	2	Partial capture
09-21 14:34	40m	-16 / -	F1PBZ	- / -3	2	✓ Closing fragment
09-21 14:33	40m	- / -	DG3IAM	-6 / -	10	Partial capture
09-21 14:31	40m	- / -	DL6UM	+1 / -	14	Partial capture
09-21 14:31	40m	-18 / -8	DF0PDF	+6 / -2	4	✓ Full exchange observed
09-21 14:29	40m	-18 / -	IU0VOG	- / -6	2	✓ Closing fragment
09-21 14:28	40m	- / -14	SP8KO	-17 / -	2	✓ Closing fragment
09-21 14:25	40m	- / -	OK3BR	-4 / -	9	Partial capture
09-21 14:24	40m	-21 / -	9A5CY	-7 / -6	3	✓ Closing observed
09-21 14:24	40m	- / +1	IU8SDA	-19 / -	3	✓ Closing fragment
09-21 14:23	40m	- / -	LA2GCA	-14 / -	2	Partial capture
09-19 14:16	40m	- / -	PB7Z	-2 / -	3	Partial capture
09-19 14:14	40m	-21 / -12	SQ6PM	+7 / -	3	✓ Closing observed
09-19 14:11	40m	- / -16	DH0BRO	-10 / -	5	Partial capture
09-18 09:30	40m	- / -18	SQ6PZL	-8 / -	2	✓ Closing fragment
09-18 09:21	40m	- / -7	PA1AZ	-10 / -	2	✓ Closing fragment
09-18 09:21	40m	- / -17	YU7AS	-14 / -	7	✓ Closing fragment
09-16 06:58	40m	- / -20	M0TRZ	-16 / -	3	✓ Closing fragment
09-16 06:54	40m	- / -	OK1CT	-3 / -	2	Partial capture
09-16 06:51	40m	- / -	F4IGP	-21 / -	2	Partial capture
09-16 06:47	40m	-17 / -	F4MXE	- / -16	3	✓ Closing fragment
09-16 06:46	40m	-20 / -	F3CJ	- / -16	2	✓ Closing fragment
09-16 06:46	40m	-19 / -8	OE2GRN	-13 / -1	9	✓ Full exchange observed
09-16 06:44	40m	-14 / -15	OK1DCM	-8 / -12	6	✓ Full exchange observed
09-16 06:42	40m	-20 / +10	IW3IFJ	-17 / -	3	✓ Closing observed
09-16 06:41	40m	-18 / -14	IK2ULS	-7 / -	8	✓ Closing observed
09-16 06:39	40m	- / -10	OZ1KQJ	-17 / -	3	Partial capture
09-16 06:37	40m	-18 / -1	I8IGS	-15 / -16	4	Partial capture
09-16 06:37	40m	-18 / 0	E75FM	-6 / -8	6	✓ Full exchange observed
09-16 06:36	40m	-17 / -	YO8RCA	-4 / -13	3	✓ Closing observed
09-14 08:36	40m	- / -4	PA9JO	-14 / -	2	Partial capture
09-14 08:30	40m	- / -	DK1RWR	-14 / -	2	Partial capture
09-14 08:25	40m	- / +8	DK3NU	-17 / -	3	✓ Closing fragment
09-14 08:25	40m	- / -	9A4AA	-16 / -	2	Partial capture
09-14 08:17	40m	- / -15	SP9BCH	+4 / -	4	✓ Closing fragment
09-11 08:14	40m	- / -8	E75FM	-13 / -	6	Partial capture
09-11 08:13	40m	- / -	OZ1JMJ	-18 / -	3	Partial capture
09-11 07:59	40m	-22 / +4	DL6YES	-16 / -	3	✓ Closing observed
09-11 07:53	40m	-19 / -	DL6YES	-14 / -18	3	Partial capture
09-11 07:52	40m	-18 / -	SP9AU	- / -12	2	✓ Closing fragment
09-10 15:48	40m	- / -	DL3HN	-7 / -	5	Partial capture
09-10 15:44	40m	- / -12	DJ3JD	-3 / -	8	Partial capture
09-10 15:41	40m	-14 / -2	OZ4KAJ	-5 / -	3	✓ Closing observed
09-10 15:37	40m	-17 / -	G6ZRV	-17 / -	3	✓ Closing observed
09-10 15:37	40m	- / -12	US5ZCO	0 / -	3	✓ Closing fragment
09-09 06:55	40m	- / -	EU7FBB	0 / -	2	Partial capture
09-07 15:33	40m	- / -	DL6PCS	-4 / -	2	Partial capture
09-07 15:29	40m	-15 / -10	IU8RFW	-14 / -6	5	✓ Full exchange observed
09-07 15:27	40m	- / -7	DL3YDX	-4 / -	3	✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
143715  +3 2190  TK5NJ SP3RBQ JO82
143715  -6 1103  TK5NJ OK3BR JN69
143715  -3  909  TK5NJ DL6UM JO60
143715  -2  852  TK5NJ DG3IAM JN48
143730 -19 2189  CQ TK5NJ JN41
143745  +3  909  TK5NJ DL6UM JO60
143745  -8  852  TK5NJ DG3IAM JN48
143815  -7 1103  TK5NJ OK3BR JN69
143815  +1  909  TK5NJ DL6UM JO60
143815  -6  852  TK5NJ DG3IAM JN48
143845  +0  909  TK5NJ DL6UM JO60
143845  -4  852  TK5NJ DG3IAM JN48
143915  -5 1103  TK5NJ OK3BR JN69
143915  -1  909  TK5NJ DL6UM JO60 (x2)

20m

UTC    dB Audio  Message
135915  +4 2178  TK5NJ G4UJS RR73
084545  -5 2176  CQ TK5NJ JN41 (x2)
084645  -2 2176  DF8MH TK5NJ -15
084700  -9  909  TK5NJ TA1GO KN41
084715  -5 2177  DF8MH TK5NJ RR73
084730  +0  909  TK5NJ TA1GO KN41
084745  -6 2177  DF8MH TK5NJ -19
084800  -7  908  TK5NJ TA1GO KN41
084845 -13 2177  TA1MB TK5NJ -17
084900  -6 2177  TK5NJ TA1MB KN41
084915  -4 2177  TA1MB TK5NJ -17
084930  -7 2177  TK5NJ TA1MB R-18
084945  -5 2176  TA1MB TK5NJ RR73 (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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