YO3JW — FT8 activity observed at SO8OO

Observed FT8 message patterns

Attributed sample

576 messages

Active dates

20 UTC dates

Estimated median S/N

-3 dB

Estimated 10th-90th percentile

-12 to +9 dB

Recurring-pattern threshold

Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 18, moderate (-15 to -9 dB) 113, strong (≥ -8 dB) 445.

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 YO3JW 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 YO3JW

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 · 433 decoded messages

SO8OO receiver locator

KN09VW

Locator-centre separation

628 km (approx.)

Last such locator decoded

2026-09-19 19:57 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
210615  +7  989  5Z4VJ YO3JW KN35 (x5)
201500  +0 1058  UA3SCU YO3JW KN35 (x4)
201915 -16 1088  YO3JW UA3SCU RR73
201930  +5 1058  UA3SCU YO3JW 73
174630 +14 2541  YO3JW YU65AEC -06
195745  -1 1204  RK9UE YO3JW KN35
195830  -8  663  YO3JW RK9UE RR73
195845  +8 1204  RK9UE YO3JW 73

UTC    dB Audio  Message
154445 +19  614  RW4CCW YO3JW R-03
154500  -4  628  YO3JW RW4CCW RR73
154515 +18  614  RW4CCW YO3JW 73
154915 +12  614  R1TET YO3JW KN35
154930  -7 1506  YO3JW R1TET +05
154945 +11  614  R1TET YO3JW R-03 (x2)
155030  -3 1506  YO3JW R1TET RR73
155045 +12  614  R1TET YO3JW 73
155100  -7 1506  YO3JW R1TET 73
185630  +7 1240  RA4CGX YO3JW KN35
185645 -13 1394  YO3JW RA4CGX +02
185700 +11 1240  RA4CGX YO3JW R-06
185715  -7 1394  YO3JW RA4CGX RR73
185730  +6 1240  RA4CGX YO3JW 73

UTC    dB Audio  Message
201500  -3 1388  CQ YO3JW KN35 (x15)

UTC    dB Audio  Message
190045  -9  540  YO3JW DG4BZ JO42
190115  -8 1931  YO3JW IK4CBO R-06
190115  -6 2095  YO3JW DK2NG JO52
190115  -9  540  YO3JW DG4BZ JO42
190145 -15 2482  YO3JW DL9JD JN47
190145  -6 2095  YO3JW DK2NG R+01
190215 -13 2483  YO3JW DL9JD JN47
190230  -9 1431  DG4BZ YO3JW -18
190300  -5 1431  CQ YO3JW KN35 (x2)
190345  -2  540  YO3JW DG4BZ R-06 (x5)

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.