HB9CTU — FT8 activity observed at SO8OO

Observed FT8 message patterns

Attributed sample

238 messages

Active dates

9 UTC dates

Estimated median S/N

+4 dB

Estimated 10th-90th percentile

-10 to +14 dB

Recurring-pattern threshold

Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 9, moderate (-15 to -9 dB) 22, strong (≥ -8 dB) 207.

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 HB9CTU 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 HB9CTU

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

JN47 · 150 decoded messages

SO8OO receiver locator

KN09VW

Locator-centre separation

975 km (approx.)

Last such locator decoded

2026-08-11 12:47 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
111245  +0  633  W4PSK HB9CTU JN47 (x3)
124715 +11  597  JH2BJL HB9CTU JN47 (x3)
124845 +14  597  6K5BXQ HB9CTU -16 (x9)

UTC    dB Audio  Message
131100 +13  628  LU8GCJ HB9CTU R-14 (x3)
131230  +5  628  YD8CPZ HB9CTU JN47 (x4)
131445 +10  628  KB1EFS HB9CTU JN47 (x3)
131845  +9  627  HI8L HB9CTU JN47 (x4)
132130 -11  628  HB9CTU S54J JN76

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.