F4AMS — reception at SO8OO

Observed FT8 message patterns

Attributed sample

389 messages

Active dates

39 UTC dates

Estimated median S/N

-9 dB

Estimated 10th-90th percentile

-18 to +2 dB

Recurring-pattern threshold

Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 77, moderate (-15 to -9 dB) 120, strong (≥ -8 dB) 192.

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 F4AMS 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 F4AMS

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

IN97 · 324 decoded messages

SO8OO receiver locator

KN09VW

Locator-centre separation

1,687 km (approx.)

Last such locator decoded

2026-10-03 20:47 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
000945  +4 1836  R3ST F4AMS IN97 (x4)
013930 -11 1843  LA3CSA F4AMS IN97 (x3)
210615 -12 1843  RI1FJZ F4AMS IN97 (x5)
223100 -11 1843  UA4POO F4AMS IN97 (x2)
204715 -13 1646  BD8ENU F4AMS IN97

UTC    dB Audio  Message
225730 -11 1691  D44TWO F4AMS IN97 (x8)
230115  +2 2736  F4AMS DL7ARV JO62 (x2)

UTC    dB Audio  Message
221900 -15 1800  D44TWO F4AMS IN97 (x7)
212715  -8 1800  EG1PDA F4AMS IN97 (x3)
212845 -10 1800  DK8HC F4AMS -03
212900  -5  598  F4AMS DK8HC R-06
212915 -10 1800  DK8HC F4AMS -03 (x2)
213000  -6  597  F4AMS DK8HC 73

UTC    dB Audio  Message
223815 -14 1789  RI1FJL F4AMS IN97 (x15)

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.