4L8A — reception at SO8OO

Observed FT8 message patterns

Attributed sample

562 messages

Active dates

11 UTC dates

Estimated median S/N

+2 dB

Estimated 10th-90th percentile

-9 to +11 dB

Recurring-pattern threshold

Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 13, moderate (-15 to -9 dB) 49, strong (≥ -8 dB) 500.

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 4L8A 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 4L8A

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

LN21 · 233 decoded messages

SO8OO receiver locator

KN09VW

Locator-centre separation

2,020 km (approx.)

Last such locator decoded

2026-10-05 01:55 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
015615  -2 1786  CX6TU 4L8A -06 (x2)
015700  -6 2677  4L8A MI7XHT IO64
015730  -9 1786  LW7ELF 4L8A -14 (x2)
015900  -3 1786  PY2DPM 4L8A -12 (x3)
020045 -18  864  4L8A UB6OFG KN98
020045  -5 1786  PY3EZ 4L8A -24 (x3)
020200 +14 1335  4L8A OK1DXR JO60
020200 -14 2677  4L8A MI7XHT IO64
020230  +8 1335  4L8A OK1DXR JO60

UTC    dB Audio  Message
203445  +4 1926  CQ 4L8A LN21 (x2)
203530  -7 2046  4L8A NF3R FN20
203530  -5  344  4L8A MI7RDK IO74 (x2)
203600 -12 1926  4L8A DG5PW JO30
203700  -8  465  4L8A RR73; KP3V <RI1FJL> -04
203700  -8 2046  4L8A NF3R FN20

UTC    dB Audio  Message
125245 -10 2633  4L8A F1PBZ -16 (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.