NT4K — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: United States Most frequent locator attributed to this token: EL98

Receiver-side FT8 activity involving NT4K, decoded by SO8OO in southeastern Poland. 51 FT8 messages attributed to this token as transmitter, on 80m, 40m, across 5 UTC dates in the available aggregate history. Observed between 2026-08-29 and 2026-09-20.

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 51 FT8 messages attributed to NT4K as the transmitting token by decoded message structure across 5 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (75%), followed by 80 m (25%). Most decodes (100%) fell within the six-hour window 23:00-05:00 UTC. Most successfully decoded messages attributed to this token fell in SO8OO's weak S/N range (69%); the estimated median was -17 dB.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-17 dB

Estimated median S/N

Bands

80m · 13 40m · 38

First attributed message: 2026-08-29
Last attributed message: 2026-09-20 03:29 UTC

Observed FT8 message patterns

Attributed sample: 51 messages
Active dates: 5 UTC dates
Estimated median S/N: -17 dB
Estimated 10th-90th percentile: -24 to -13 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 35, moderate (-15 to -9 dB) 12, strong (≥ -8 dB) 4.

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 NT4K in decoded directed-looking exchanges:

OK1ZCF · Czech Republic ×2 DK5ON · Fed. Rep. of Germany EI3CTB · Ireland F5NBU · France F5OEQ · France K8OD · United States R5DT · European Russia SP5LST · Poland SV1DKR · Greece UW8SM · Ukraine WB8NXR · United States DL2MIJ · 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 NT4K

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: EL98 · 19 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 8,464 km (approx.)
Last such locator decoded: 2026-09-20 03:23 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	NT4K S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-20 03:33	40m	- / -14	F5NBU	+2 / -	3	✓ Closing fragment
09-20 03:28	40m	-21 / -	UW8SM	- / -7	2	✓ Closing fragment
09-20 03:26	40m	- / -22	R5DT	+8 / -	2	✓ Closing fragment
09-20 03:20	40m	-18 / -	R5DT	- / -	2	Partial capture
09-20 03:19	40m	-16 / -	WB8NXR	- / -10	2	✓ Closing fragment
09-17 03:45	40m	- / -7	SV1DKR	-3 / -	4	✓ Closing fragment
09-16 04:56	80m	- / -	9A5E	+1 / -	3	Partial capture
09-16 04:53	80m	-22 / -	W6G	- / +9	2	✓ Closing fragment
09-15 23:45	40m	-2 / -	SP5LST	- / +3	2	✓ Closing fragment
09-15 23:43	40m	-4 / -	EI3CTB	-8 / -12	4	✓ Closing observed
09-15 04:21	80m	- / -10	EI4KX	-24 / -	2	Partial capture
09-15 04:14	80m	- / -15	M9DNC	-24 / -	2	Partial capture
09-15 04:14	80m	- / -	SP6JIU	+8 / -	2	Partial capture
09-15 04:12	80m	- / -10	DL2MIJ	-14 / -	3	✓ Closing fragment
09-15 04:11	80m	- / -9	ON7GB	+7 / -	3	✓ Closing fragment
09-15 04:10	80m	- / -16	M9DNC	-21 / -	4	Partial capture
09-15 04:08	80m	-18 / -10	IV3GHY	+6 / -	3	✓ Closing observed
09-15 04:08	80m	-22 / -11	LY7T	+6 / +2	7	✓ Full exchange observed
09-15 04:07	80m	-16 / -11	F1PBZ	-3 / +1	3	✓ Full exchange observed
09-15 04:07	80m	- / -	HA5CPN	+7 / -	2	Partial capture
09-15 04:06	80m	-14 / -	N2RSI	- / -5	2	Partial capture
08-30 03:42	80m	- / -	DO5PY	-9 / -	5	Partial capture
08-30 03:41	80m	- / -	SP3IOE	+5 / -	3	Partial capture
08-30 03:36	80m	- / -	IK2LFF	-3 / -	6	Partial capture
08-30 03:35	80m	- / -	OK1UOZ	+6 / -	9	Partial capture
08-29 03:38	40m	-16 / -	OK1ZCF	- / -13	5	✓ Closing fragment
08-29 03:37	40m	-18 / -1	F5MNW	-5 / -17	12	Partial capture
08-29 03:35	40m	-17 / +4	F5OEQ	-13 / -11	4	✓ Full exchange observed
08-29 03:33	40m	- / -	RV3O	+7 / -	2	Partial capture
08-29 03:31	40m	- / -	4Z5NN	-11 / -	3	Partial capture
08-29 03:03	40m	-16 / -	W1AW/5	- / -	2	Partial capture
07-23 01:07	40m	- / +2	DK5ON	-12 / -	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
034630  -8 1970  NT4K SV1DKR 73
031815 -19 1977  T46W NT4K R-03
031915 -13 1977  WB8NXR NT4K -10 (x2)
032015 -21 1977  R5DT NT4K EL98 (x2)
032330 -18 1677  KL7J NT4K EL98
032600  +6  680  NT4K R5DT -22 (x2)
032800 -24 1678  K8OD NT4K RR73
032830 -22 1677  UW8SM NT4K -07 (x2)
033315  +2 1678  NT4K F5NBU JN28 (x3)

80m

UTC    dB Audio  Message
041330 -17 1997  NT4K DL2MIJ RR73
041400  +8 1943  NT4K SP6JIU JO80
041415 -24 1942  IV3WMS NT4K -22
041430 -24  593  NT4K M9DNC -15
041600  +9 1943  NT4K SP6JIU JO80
041600 -24  698  NT4K M9DNC -15
041630 -11  287  NT4K YO8RAW KN36
042145 -24 1354  NT4K EI4KX -10 (x2)
042415 +13 1943  NT4K SP6JIU 73
045300 -21 1943  W6G NT4K R+09 (x2)
045645  +0 1972  NT4K 9A5E JN75 (x3)

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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