OH3JF — FT8 activity observed at SO8OO

Observed FT8 message patterns

Attributed sample

1,779 messages

Active dates

49 UTC dates

Estimated median S/N

-2 dB

Estimated 10th-90th percentile

-15.6 to +9 dB

Recurring-pattern threshold

Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 179, moderate (-15 to -9 dB) 297, strong (≥ -8 dB) 1,303.

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 OH3JF 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 OH3JF

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

KP20 · 1,224 decoded messages

SO8OO receiver locator

KN09VW

Locator-centre separation

1,192 km (approx.)

Last such locator decoded

2026-09-20 04:26 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
001615  +5 1958  ON1JP OH3JF 73
042445  -8 1959  CQ DX OH3JF KP20 (x4)
042645 -15 1959  F4CSG OH3JF -20
042700 -17 2024  OH3JF F4CSG IN96
042715 -12 1959  F4CSG OH3JF -14 (x2)
042800 -12 1959  OH3JF R1AV KP50
042815 -15 1959  F4CSG OH3JF RR73
042830 -21 1958  OH3JF F5LMJ JN28
042845 -12 1959  F4CSG OH3JF RR73
042900 -14 1960  OH3JF R1AV KP50
042915  -7 1959  F4CSG OH3JF RR73

UTC    dB Audio  Message
021315  -9 2283  OH3JF SP5MIG KO02 (x2)
030015  -9 2440  CQ DX OH3JF KP20 (x4)
225715 -24 1637  OH3JF ON1DGN -10 (x2)
210245 -11 2852  RI1FJZ OH3JF KP20 (x2)
025100  -4 1144  OH3JF TA7I KN91 (x4)
230715  -8  619  CQ DX OH3JF KP20

UTC    dB Audio  Message
025345  +8 2506  CQ DX OH3JF KP20 (x15)

UTC    dB Audio  Message
222915  -8 2403  RI1FJZ OH3JF KP20 (x10)
223445  -1 2403  CQ DX OH3JF KP20 (x2)
204845 -23 2072  RI1FJZ OH3JF KP20 (x3)

UTC    dB Audio  Message
020400  -8  426  AI5OS OH3JF -05 (x12)
041245 -20 2104  OH3JF EP2AES LM55 (x3)

UTC    dB Audio  Message
073145  -8 2335  OH3JF R7RAE KN64 (x4)
101215 -11 1345  OH3JF UA3ZUX KO90 (x2)
154645 -17 2325  OH3JF R7OV 73
084145  -4  438  OH3JF IU3GOR R-10 (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.