JH5AVM — reception at SO8OO

Observed FT8 message patterns

Attributed sample

1,749 messages

Active dates

48 UTC dates

Estimated median S/N

-11 dB

Estimated 10th-90th percentile

-22 to -3 dB

Recurring-pattern threshold

Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 558, moderate (-15 to -9 dB) 584, strong (≥ -8 dB) 607.

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 JH5AVM 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 JH5AVM

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

PM73 · 795 decoded messages

SO8OO receiver locator

KN09VW

Locator-centre separation

8,654 km (approx.)

Last such locator decoded

2026-08-30 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
182000  -6 1663  JH5AVM EA3EQ JN01
190700  +0 2457  JH5AVM RV6AVU KN94
204630 -15 1925  JH5AVM DK5WL R-18 (x2)
213530  -9  973  JH5AVM RV6AVU KN94 (x5)
175700  -9  834  JH5AVM R2AL R-19 (x2)
191230  +1 1315  JH5AVM UA3PFR KO93
171130  -4 1975  JH5AVM R7DX KN84 (x3)

UTC    dB Audio  Message
181930 -11 1309  JH5AVM YL2CA KO06
181930  +9  424  JH5AVM UR4LRG -12
181930 +12 1662  JH5AVM SP2HNF JO94
181930  +8  756  JH5AVM RG5A KN93
181930  +2 2233  JH5AVM RA3LCX KO65
181930  +2 2423  JH5AVM IQ4JO JN63
182000 +12 1662  JH5AVM SP2HNF JO94
182000  +7  756  JH5AVM RG5A KN93
182000  -1 1308  JH5AVM OZ2LIN JO46
182030  -3 1308  JH5AVM YL2CA KO06
182030 +13  757  JH5AVM RG5A KN93
182030  -2 1911  JH5AVM RA3LCX KO65
182100 +10  757  JH5AVM RG5A KN93
182100  +4 1911  JH5AVM RA3LCX KO65 (x2)

UTC    dB Audio  Message
190500  -7 1601  JH5AVM IT9MRM R-14
191530  -1 1019  JH5AVM IK2WRI JN45 (x2)
183430  -1 1966  JH5AVM MM0JTV IO75 (x11)
190200  -4 1880  JH5AVM M7SZB -20

UTC    dB Audio  Message
103800  -4 1610  JH5AVM LX1NO JN39 (x3)

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.