JF1EHM — FT8 activity observed at SO8OO

Observed FT8 message patterns

Attributed sample

14 messages

Active dates

3 UTC dates

Estimated median S/N

-20 dB

S/N percentile sample

Too small

Recurring-pattern threshold

Not met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 10, moderate (-15 to -9 dB) 4, 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 JF1EHM in decoded directed-looking exchanges:

Most frequent locator attributed to JF1EHM

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

PM95 · 2 decoded messages

SO8OO receiver locator

KN09VW

Locator-centre separation

8,693 km (approx.)

Last such locator decoded

2026-08-26 14:37 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
213215  -6 2838  JF1EHM M8KUG IO81
213215 -15 2044  JF1EHM BG7BVI -19
213230 -19 1701  M0LAD JF1EHM -18
213415 -12 2838  JF1EHM M8KUG IO81
213415 -17 2043  JF1EHM BG7BVI -14
213515 -14 2837  JF1EHM M8KUG IO81
214130  -8 2275  JF1EHM BG7BMG -02
215000 -21 1701  JF1EHM DC9YH JO40
215045 -15 1702  DC9YH JF1EHM RR73
215100 -18 2275  JF1EHM BG7BMG -09 (x2)
143730 -15 1699  OZ6NC JF1EHM PM95
144115 -13 1698  RI1FJL JF1EHM R-06 (x2)
072930  -2  903  JF1EHM F5LOW -12

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.