NV4B — reception at SO8OO

Signals decoded by SO8OO in southeastern Poland. FT8 and CW have separate histories; all times are UTC.

FT8 activity

DXCC entity inferred from callsign: United States Most frequent locator attributed to this token: EM64

Receiver-side FT8 activity involving NV4B, decoded by SO8OO in southeastern Poland. 12 FT8 messages attributed to this token as transmitter, on 80m, 40m, across 2 UTC dates in the available aggregate history. Observed between 2026-09-21 and 2026-10-21.

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 12 FT8 messages attributed to NV4B as the transmitting token by decoded message structure across 2 UTC dates in the available aggregate history. The largest monitored-band total was 40 m (92%), followed by 80 m (8%). In this small sample, the estimated median decoder S/N was -9 dB; no usual signal pattern is inferred.

Overview

Messages attributed

UTC dates decoded

Active 15-min windows

-9 dB

Estimated median S/N

Bands

80m · 1 40m · 11

First attributed message: 2026-09-21
Last attributed message: 2026-10-21 05:01 UTC

Observed FT8 message patterns

Attributed sample: 12 messages
Active dates: 2 UTC dates
Estimated median S/N: -9 dB
S/N percentile sample: Too small
Recurring-pattern threshold: Not met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 1, moderate (-15 to -9 dB) 5, strong (≥ -8 dB) 6.

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. The sample does not meet the threshold for a recurring time or signal-pattern claim (20 attributed messages, three UTC dates and five distinct 15-minute windows).

Frequent counterpart tokens observed at SO8OO

Tokens most often paired with NV4B in decoded directed-looking exchanges:

CR7BUW · Portugal CT2JMA · Portugal F1PBZ · France 5Z4VJ · Kenya SP7NC · Poland UT9NA · Ukraine YO6LM · Romania CT2GQA · Portugal DF0KK · Fed. Rep. of Germany DO1SJF · Fed. Rep. of Germany F4EGM · France F4LZZ · France

Most frequent locator attributed to NV4B

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: EM64 · 3 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 8,314 km (approx.)
Last such locator decoded: 2026-09-21 03:47 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	NV4B S/N	Counterpart	Counterpart S/N	Msgs	Capture
11-05 02:51	80m	- / -25	UT5EL	+20 / -	2	✓ Closing fragment
10-28 05:36	160m	- / -12	F1PBZ	-2 / -	4	✓ Closing fragment
10-28 05:36	160m	- / -19	F5USK	-10 / -	2	Partial capture
10-21 13:39	10m	- / -10	CT2JMA	-6 / -	2	✓ Closing fragment
10-21 13:32	10m	- / -12	CR7BUW	-17 / -	4	✓ Closing fragment
10-21 05:08	80m	- / -19	DL1MEV	-4 / -	2	Partial capture
10-21 05:03	80m	- / -15	F1PBZ	+1 / -	2	Partial capture
10-21 05:03	80m	- / -19	PA3FPQ	+5 / -	5	✓ Closing fragment
10-21 05:01	80m	- / -	DO1NAE	-11 / -	3	Partial capture
10-21 05:00	80m	- / -	PA3KUS	-13 / -	9	Partial capture
10-21 04:59	80m	- / -17	CT2GQA	-8 / -	4	✓ Closing fragment
10-21 04:59	80m	-22 / -25	DK7ZT	+12 / -18	5	Partial capture
10-21 04:56	80m	- / -10	G0BLB	+2 / -	2	✓ Closing fragment
10-21 04:54	80m	- / -25	F4LZZ	-10 / -	4	✓ Closing fragment
10-21 04:53	80m	- / -12	HB9AZZ	+10 / -	3	✓ Closing fragment
10-21 04:52	160m	- / -25	DK7ZT	+5 / -	5	Partial capture
10-21 04:52	80m	- / -15	DO1SJF	+4 / -	5	✓ Closing fragment
10-21 04:52	80m	- / -	DF0KK	-9 / -	2	✓ Closing fragment
10-21 04:46	80m	- / -14	F4EGM	-11 / -	3	✓ Closing fragment
09-21 03:53	40m	- / -8	EA5IT	-12 / -	2	Partial capture
09-21 03:52	40m	-8 / -	UT9NA	- / -15	2	✓ Closing fragment
09-21 03:50	40m	-7 / -	SP7NC	- / -9	2	✓ Closing fragment
09-21 03:48	40m	-7 / -14	R2EC	+15 / -18	4	Partial capture
09-21 03:46	40m	-9 / -	5Z4VJ	- / -5	5	✓ Closing fragment
09-04 03:27	40m	- / -	YO6QDY	-10 / -	2	Partial capture

Recent FT8 messages decoded at SO8OO

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

80m

UTC    dB Audio  Message
050330  +1 2705  NV4B F1PBZ -15
050400  -5  755  NV4B PA3KUS JO21
050400 +10  507  NV4B PA3FPQ R-19
050430 -17  755  NV4B PA3KUS JO21
050430  +1  507  NV4B PA3FPQ R-19
050500 -17  755  NV4B PA3KUS JO21
050500  +1  507  NV4B PA3FPQ 73
050530 -21  755  NV4B PA3KUS JO21 (x3)
050800  -5 2539  NV4B DL1MEV JN58 (x2)
005800  +9 2494  NV4B F4UJU JN06
025130 +19 2395  NV4B UT5EL -25 (x2)

160m

UTC    dB Audio  Message
045230  +2  824  NV4B DK7ZT -25 (x5)
053615  -9 2056  NV4B F5USK JN03
053615  +2 2355  NV4B F1PBZ -12
053645 -12 2056  NV4B F5USK R-19
053645  -2 2355  NV4B F1PBZ -12 (x3)

10m

UTC    dB Audio  Message
133230 -16 1593  NV4B CR7BUW IM58 (x4)
133930  -1 2224  NV4B CT2JMA -10 (x2)

40m

UTC    dB Audio  Message
034830 -10 2720  5Z4VJ NV4B 73
034845 +13 2868  NV4B R2EC KO82 (x2)
034930  -7 2800  R2EC NV4B -18
034945 +14 2868  NV4B R2EC R-14
035030  -6 2799  SP7NC NV4B -09 (x2)
035145 -20 1882  NV4B OS4K -06
035200 -10 2800  UT9NA NV4B -15 (x2)
035345 -12 1509  NV4B EA5IT IM99 (x2)
035530  -6 2800  YO6LM NV4B RR73
051015 -16 1714  NV4B SV1OML KM18
051715 -16  943  NV4B 9H1FJ -10

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.

CW

No CW receptions recorded for this callsign in the last 30 days.

Explore CW reception at SO8OO

FT8DB and SO8OO WebSDR are a hobby project maintained solo. ☕ Buy me a coffee