R4CJN — FT8 activity observed at SO8OO

Observed FT8 message patterns

Attributed sample

129 messages

Active dates

5 UTC dates

Estimated median S/N

-6 dB

Estimated 10th-90th percentile

-12 to +2 dB

Recurring-pattern threshold

Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 2, moderate (-15 to -9 dB) 41, strong (≥ -8 dB) 86.

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 R4CJN 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 R4CJN

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

LO32 · 43 decoded messages

SO8OO receiver locator

KN09VW

Locator-centre separation

1,769 km (approx.)

Last such locator decoded

2026-08-17 04:49 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
163800  +4  760  BV2NF R4CJN 73
163900  +4  760  G8IXM R4CJN -23 (x4)
044945 -14  760  CQ R4CJN LO32
045000 -13  757  R4CJN UA3NFG LO28
045015 -13  760  UA3NFG R4CJN -05
045030  -9  757  R4CJN UA3NFG R-02 (x2)
045115 -15  760  PD3LKN R4CJN -11 (x2)
045245 -16  760  DL2RPN R4CJN RR73
045600  -2  760  R4CJN R2GFD KO92 (x2)

UTC    dB Audio  Message
182515  +0 2462  R4CJN LZ2INP 73
182830  +3 1696  CQ R4CJN LO32 (x2)
182915  +5  721  R4CJN R3UG +07
182930  -2 1696  CQ R4CJN LO32
182945  +3 1695  R4CJN SP6FME JO90
182945  -5 2527  R4CJN RC3D +00
182945  +2  721  R4CJN R3UG +07
183030  +2 1696  RC3D R4CJN 73
183045  +4 1695  R4CJN SP6FME JO90
183045 -12 2527  R4CJN RC3D 73
183045  -1  721  R4CJN R3UG +08
183100  +3 1696  SP6FME R4CJN -15 (x3)

UTC    dB Audio  Message
175615  -5  685  R4CJN UA3ZQN KO90
175615  -7  729  R4CJN R6LNH 73
175615 -18 2048  R4CJN R3EDI +22
175700 -11  729  UA3ZQN R4CJN RR73
175715 -10  684  R4CJN UA3ZQN 73
175830 -11  728  R3EDI R4CJN R-01
175845  -9  685  R4CJN UA3ZQN KO90
175845 -13 1461  R4CJN R3EDI RR73
175930 -10  728  R7OQ R4CJN LO32
175945 -11 2562  R4CJN SV2AEL KN10
180030  -7  728  R7OQ R4CJN 73
180045  -9 2563  R4CJN SV2AEL KN10 (x4)

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.