EX9A — FT8 activity observed at SO8OO

Observed FT8 message patterns

Attributed sample

62 messages

Active dates

1 UTC dates

Estimated median S/N

-20 dB

Estimated 10th-90th percentile

-23 to -17 dB

Recurring-pattern threshold

Not met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 59, moderate (-15 to -9 dB) 3, strong (≥ -8 dB) 0.

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. The sample does not meet the threshold for a recurring time or signal-pattern claim (20 attributed messages, three UTC dates and five distinct 15-minute windows).

Frequent counterpart tokens observed at SO8OO

Tokens most often paired with EX9A 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 EX9A

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

MN72 · 11 decoded messages

SO8OO receiver locator

KN09VW

Locator-centre separation

4,086 km (approx.)

Last such locator decoded

2026-07-25 13:14 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
120845  -9  262  EX9A R4HJN LO43 (x6)
121915 -20 1852  EX9A R6LQU KN97 (x2)
122445 -13 1272  EX9A R6FMW LN14 (x4)
123415 -21 1852  EX9A RY6O 73
131330 -24 1852  RD7LC EX9A RR73
131400 -21 1852  CQ EX9A MN72