YO9ADN — FT8 activity observed at SO8OO

Observed FT8 message patterns

Attributed sample

843 messages

Active dates

40 UTC dates

Estimated median S/N

-9 dB

Estimated 10th-90th percentile

-21.7 to -1 dB

Recurring-pattern threshold

Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 218, moderate (-15 to -9 dB) 210, strong (≥ -8 dB) 415.

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 YO9ADN 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 YO9ADN

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

KN35 · 391 decoded messages

SO8OO receiver locator

KN09VW

Locator-centre separation

628 km (approx.)

Last such locator decoded

2026-09-14 20:16 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
201245  +8 2982  YO9ADN DL1UDO JO31
201615 -15 1690  CQ YO9ADN KN35
201700  +9 1962  YO9ADN SP6EFY JO72 (x3)
201900  -9  394  YO9ADN G7NUT IO91 (x3)
202100  -8 1287  YO9ADN DL5EBS JO31 (x3)
202430 -21 1968  YO9ADN 2E0JPO 73 (x2)
203130  +1 2381  YO9ADN EA8UP R-12 (x2)

UTC    dB Audio  Message
182315 +13 1581  YO9ADN HA7TM JN97
182330  -3 1581  HA7TM YO9ADN +10
182345 +16 1581  YO9ADN HA7TM R-08 (x2)
182430  -8 1581  CQ YO9ADN KN35
182445  +7 2433  YO9ADN R2EN -09
182500  -8 1581  R2EN YO9ADN R+12
182515  +5 2433  YO9ADN R2EN RR73
182530 -13 1581  R2EN YO9ADN 73
182545 +10  855  YO9ADN YO9HP -07
182600 -10 1581  YO9HP YO9ADN R+13
182615  +4  855  YO9ADN RR73; US7UK <...> -02
182700  -7 1581  RK6OQ YO9ADN +07 (x3)

UTC    dB Audio  Message
193645  -5 1785  YO9ADN EA1CQ R-11 (x2)
193815 -10 1786  YO9ADN EA3CFV JN11 (x3)
193945 -17 1768  YO9ADN VE3NVK FN25
194045  -3 1785  YO9ADN M8FQT IO93 (x3)
194515  -7  935  YO9ADN G8RZ IO84
195715 +14  378  YO9ADN OO0O R+09 (x5)

UTC    dB Audio  Message
105800  -7  634  YO9ADN F4HTA -15 (x2)
110100 -16 1054  YO9ADN PD1DRE RR73
110100 -13 1805  YO9ADN DH1NGL +01 (x4)
110330  -6 1631  YO9ADN DG6TOM R-12 (x2)

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.