TM8H — FT8 activity observed at SO8OO

Observed FT8 message patterns

Attributed sample

170 messages

Active dates

2 UTC dates

Estimated median S/N

-15 dB

Estimated 10th-90th percentile

-19 to -11 dB

Recurring-pattern threshold

Not met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 74, moderate (-15 to -9 dB) 89, strong (≥ -8 dB) 7.

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 TM8H 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 TM8H

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

JN09 · 130 decoded messages

SO8OO receiver locator

KN09VW

Locator-centre separation

1,491 km (approx.)

Last such locator decoded

2026-08-08 11:12 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
171945 -15 1527  TM8H ON7KEI JO21
173615  -9 1806  TM8H F4EOC JN39 (x9)
174315 -13 2333  TM8H DL9YNG JN48
174345 -19 1806  TM8H F4EOC JN39
182115 -20 1496  TM8H F4IGI JN06
150645  +1 2458  TM8H IV3GHY -01 (x2)

UTC    dB Audio  Message
105900 -18 2317  CQ TM8H JN09 (x9)
111745  -9 2317  TM8H DH2RL JN68 (x4)
115145  -8 2415  TM8H EA5GX IM99 (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.