DK9JC — reception at SO8OO

Observed FT8 message patterns

Attributed sample

659 messages

Active dates

20 UTC dates

Estimated median S/N

-7.8 dB

Estimated 10th-90th percentile

-20 to +1 dB

Recurring-pattern threshold

Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 143, moderate (-15 to -9 dB) 159, strong (≥ -8 dB) 357.

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 DK9JC 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 DK9JC

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

JN39 · 509 decoded messages

SO8OO receiver locator

KN09VW

Locator-centre separation

1,063 km (approx.)

Last such locator decoded

2026-10-21 20:39 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
201730 -12 1167  OD5ZZ DK9JC JN39 (x15)

UTC    dB Audio  Message
222245 -18 1092  CT1EEX DK9JC RR73
222630 -21 1092  RA5AD DK9JC JN39
191330 -10 1184  R2FC DK9JC JN39 (x5)
191700  -7  602  IS0BQE DK9JC JN39 (x2)
191945 -11 2165  LY8O DK9JC JN39
192000  -1 1702  DK9JC LY8O -17
192015  -8 2165  LY8O DK9JC R-09
192030  -3 1702  DK9JC LY8O RR73
192045 -15 2164  LY8O DK9JC 73
214645 -21 1849  CQ DK9JC JN39

UTC    dB Audio  Message
221045  -8 2488  XV9B DK9JC JN39 (x2)
074700 -18 2277  W2BCC DK9JC JN39 (x4)
075530 -21 2135  CQ DX DK9JC JN39 (x3)
080030 -22 2135  F4GYI DK9JC RR73
205730  -5 1080  4X1UF DK9JC JN39
205745  -5 2416  DK9JC 4X1UF -15
205800  -6 1080  4X1UF DK9JC R-14
205815  -6 2416  DK9JC 4X1UF RR73
205830  -6 1080  4X1UF DK9JC 73

UTC    dB Audio  Message
230600 -11 2103  YO9IE DK9JC 73
230630 -13 2103  CE2SV DK9JC -07
230645 -13 2528  DK9JC CE2SV R-20
230700 -12 2103  CE2SV DK9JC RR73
230715 -13 2528  DK9JC CE2SV 73
230730 -11 2103  DL1CC DK9JC JN39
230745  -2 1332  DK9JC DL1CC +32
230800 -11 2102  DL1CC DK9JC R+13
230815  -4 1332  DK9JC DL1CC RR73
230830 -11 2103  DL1CC DK9JC 73
230930 -12 2103  DL1UDO DK9JC JN39
230945  -5 1527  DK9JC DL1UDO +07
231000 -13 2103  DL1UDO DK9JC R+18
231015  -1 1527  DK9JC DL1UDO RR73
231030 -12 2103  DL1UDO DK9JC 73

UTC    dB Audio  Message
224145  -8  604  G1YEF DK9JC JN39

UTC    dB Audio  Message
150430  -7 2807  DK9JC F5SZY R-02
220130 -21 1466  WP4NNZ DK9JC JN39 (x4)
220400 -20 1466  XQ3SK DK9JC JN39 (x2)
220715 -20 1467  FM5GB DK9JC JN39 (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.