F4MMH — FT8 activity observed at SO8OO

Observed FT8 message patterns

Attributed sample

543 messages

Active dates

9 UTC dates

Estimated median S/N

-8 dB

Estimated 10th-90th percentile

-15 to -1 dB

Recurring-pattern threshold

Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 54, moderate (-15 to -9 dB) 195, strong (≥ -8 dB) 294.

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 F4MMH 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 F4MMH

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

JN18 · 334 decoded messages

SO8OO receiver locator

KN09VW

Locator-centre separation

1,370 km (approx.)

Last such locator decoded

2026-09-19 18:34 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
181300 -14 1302  9A4ZM F4MMH RR73
181315  +7 1298  F4MMH 9A4ZM 73
181400 -16 1303  JE6WOQ F4MMH JN18 (x4)
193445 -17 1303  9H5SN F4MMH JN18
181745 -20  865  V51WH F4MMH JN18 (x8)

UTC    dB Audio  Message
064830  +3  342  F4MMH YO3GNF KN34 (x5)
065045 -16 1140  ND9M F4MMH R-25
065100  -2  342  F4MMH YO3GNF KN34
065245 -10 1141  G7HJX F4MMH JN18 (x3)
154015  -9 2410  RM0F/P F4MMH R-03
154430  +0 2757  SM2ODB F4MMH JN18
154630  -6  933  OH3MB F4MMH JN18
154745  +1 2792  F4MMH OH3MB -04 (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.