F4NJU — FT8 activity observed at SO8OO

Observed FT8 message patterns

Attributed sample

356 messages

Active dates

24 UTC dates

Estimated median S/N

-9 dB

Estimated 10th-90th percentile

-18 to 0 dB

Recurring-pattern threshold

Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 60, moderate (-15 to -9 dB) 124, strong (≥ -8 dB) 172.

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 F4NJU in decoded directed-looking exchanges:

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 F4NJU

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

JN29 · 219 decoded messages

SO8OO receiver locator

KN09VW

Locator-centre separation

1,206 km (approx.)

Last such locator decoded

2026-08-30 19:27 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.

Recent FT8 messages decoded at SO8OO

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

UTC    dB Audio  Message
205330 -20 2077  II6IALU F4NJU R+00
211730  +1 2613  F4NJU G7RAU -16 (x2)
211830  -3 2662  F4NJU F5PBG IN78
211900  -2 1783  F4NJU IU5AWQ -09
211900  +4 2663  F4NJU F5PBG IN78
063500 -12  554  F4NJU G0OYQ RR73
063730 -10  287  F4NJU IW2NEF -25
064145  -9  358  F4NJU LA3LUA -04 (x2)
065715  -8 1033  F4NJU PD1HTW -18 (x2)
104530 -15  925  F4NJU ON4CJU -08
110615 -16 1084  F4NJU PD1CIS -11 (x2)

UTC    dB Audio  Message
195645  -1 1526  F4NJU IU0TYC RR73
195645  +4 1987  F4NJU EA5JLN -09
195700 -23 1996  IU0TYC F4NJU 73
195745  +0 1985  F4NJU EA5JLN -09 (x3)
062745 -15 2441  LY5A F4NJU JN29
110130  +0 1242  F4NJU R6OP RR73
110545  -6 2259  E75W F4NJU R-01
111115  -6  521  AO5FSB F4NJU JN29
181830 -18 1473  IU1DXU F4NJU JN29
192700  -1  320  2E0TIV F4NJU JN29 (x2)
192745  -5  320  F4NJU 2E0TIV RR73
192800  -3  320  2E0TIV F4NJU 73

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.