R4CHN — FT8 activity observed at SO8OO

Observed FT8 message patterns

Attributed sample

4,905 messages

Active dates

74 UTC dates

Estimated median S/N

-11 dB

Estimated 10th-90th percentile

-19 to +0.4 dB

Recurring-pattern threshold

Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 1,170, moderate (-15 to -9 dB) 1,961, strong (≥ -8 dB) 1,774.

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 R4CHN 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 R4CHN

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

LO31 · 4,489 decoded messages

SO8OO receiver locator

KN09VW

Locator-centre separation

1,774 km (approx.)

Last such locator decoded

2026-09-11 19:36 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
190645  -7 2485  CQ R4CHN LO31 (x9)
193630  +4  474  R4CHN DG1ROL JN58
193645 -14 2486  DG1ROL R4CHN -18
193700  +3  474  R4CHN DG1ROL R+12
193715 -16 2485  DG1ROL R4CHN RR73
193730  +4  474  R4CHN DG1ROL 73
193800 -16  535  R4CHN R1BPW KP50

UTC    dB Audio  Message
173545 -22 1460  CQ R4CHN LO31 (x2)
174000  -1 1346  R4CHN OH7FAE KP52 (x3)
175445 -23 1659  CQ R4CHN LO31 (x4)
180730  +3 2334  R4CHN RA2FU -19
180745 -10 2551  CQ R4CHN LO31
180800  +0 2334  R4CHN RA2FU -19 (x4)

UTC    dB Audio  Message
052215 -11 2467  CQ R4CHN LO31
133230 -11 2378  R4CHN TA2CD KM56 (x2)
133345 -11 2176  CQ R4CHN LO31 (x2)
140530  -3 1621  R4CHN IU7IPX JN90 (x3)
141145 -22 1621  CQ R4CHN LO31 (x7)

UTC    dB Audio  Message
082400 -13  617  R4CHN RA5AK -04 (x2)
084400  +3 1100  R4CHN ON2RX JO20
053230 -20 2296  R4CHN <...> -20 (x2)
053830 -20 1187  R4CHN RW3RN R-19 (x2)
055330 -17 2090  R4CHN RA1N R-02 (x2)
142830 -15 2087  R4CHN RA6AR KN93 (x2)
151830 -11 1150  R4CHN RN6MA -03 (x3)
152930  +2 2939  R4CHN R3LC KO64

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.