N4SV — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: United States Most frequent locator attributed to this token: EN61

Receiver-side FT8 activity involving N4SV, decoded by SO8OO in southeastern Poland. 30 FT8 messages attributed to this token as transmitter, on 40m, 20m, across 3 UTC dates in the available aggregate history. Observed between 2026-07-25 and 2026-08-28.

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 30 FT8 messages attributed to N4SV as the transmitting token by decoded message structure across 3 UTC dates in the available aggregate history. The largest monitored-band total was 20 m (97%), followed by 40 m (3%). Several six-hour UTC windows tied for the largest share (90%), so no unique busiest interval is claimed. Received S/N was mixed across SO8OO's weak, moderate and strong ranges; the estimated median was -4 dB.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-4 dB

Estimated median S/N

Bands

40m · 1 20m · 29

First attributed message: 2026-07-25
Last attributed message: 2026-08-28 22:45 UTC

Observed FT8 message patterns

Attributed sample: 30 messages
Active dates: 3 UTC dates
Estimated median S/N: -4 dB
Estimated 10th-90th percentile: -21 to +2 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 11, moderate (-15 to -9 dB) 2, strong (≥ -8 dB) 17.

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 N4SV in decoded directed-looking exchanges:

CE2SV · Chile G6OTZ · England IW2DNI · Italy SV1CNS · Greece ZL4TT · New Zealand SV8JE · Greece

Most frequent locator attributed to N4SV

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: EN61 · 28 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 7,717 km (approx.)
Last such locator decoded: 2026-08-28 22:45 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	N4SV S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-15 04:19	40m	- / -	IZ2QPP	+6 / -	2	Partial capture
08-30 05:09	20m	- / -6	ZL4TT	0 / -	2	✓ Closing fragment
08-28 22:44	20m	0 / -	Z62NS	- / -	3	Partial capture
08-28 22:42	20m	-3 / -	SV1CNS	- / +8	2	✓ Closing fragment
08-28 22:41	20m	- / -	M0CNG	-20 / -	2	Partial capture
08-28 22:34	20m	0 / -	Z62NS	- / -	12	Partial capture
08-27 12:39	20m	- / -19	JA4IXI	-19 / -	2	Partial capture
08-27 06:16	20m	-19 / -	VK3EV	- / -	3	Partial capture
08-27 04:55	60m	- / -22	SV8JE	-2 / -	10	✓ Closing fragment
08-08 06:13	20m	- / -20	G6OTZ	-10 / -	12	✓ Closing fragment
08-08 06:11	20m	- / -	IW2DNI	-9 / -	3	✓ Closing fragment
07-27 05:36	20m	- / -	PD0DDA	-11 / -	3	Partial capture
07-25 00:53	20m	-18 / -	Z62NS	- / -	9	Partial capture
07-22 21:54	20m	- / -	PD0DDA	-24 / -	2	Partial capture
07-07 05:10	20m	- / -24	PD4SN	-16 / -	6	Partial capture
07-03 04:38	40m	- / -	OE9DAI	-2 / -	2	Partial capture

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
043845  -2 2292  N4SV OE9DAI JN47 (x2)
010930  -8 2780  N4SV OH3JP KP20
025015 -21 2234  <...> N4SV EN61
041915  +7  724  N4SV IZ2QPP JN46 (x2)

20m

UTC    dB Audio  Message
223815  -3 2575  Z62NS N4SV EN61 (x5)
224130 -19 1105  N4SV M0CNG IO93 (x2)
224245  -4 2574  SV1CNS N4SV +08 (x2)
224415  +0 2575  Z62NS N4SV EN61 (x3)
050715  -1 2607  N4SV ZL4TT -12 (x3)

60m

UTC    dB Audio  Message
045530  -5  364  N4SV SV8JE KM08 (x10)

10m

UTC    dB Audio  Message
170215 -11 2596  N4SV CE2SV -18 (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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