OH4JFN — FT8 activity observed at SO8OO

Observed FT8 message patterns

Attributed sample

1,147 messages

Active dates

47 UTC dates

Estimated median S/N

-8.7 dB

Estimated 10th-90th percentile

-19 to +1.4 dB

Recurring-pattern threshold

Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 223, moderate (-15 to -9 dB) 352, strong (≥ -8 dB) 572.

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 OH4JFN 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 OH4JFN

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

KP32 · 809 decoded messages

SO8OO receiver locator

KN09VW

Locator-centre separation

1,432 km (approx.)

Last such locator decoded

2026-09-14 01:41 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
003100 -15  227  OH4JFN EK/RX3DPK -12
013815  -7  227  EK/RX3DPK OH4JFN KP32
013830 -15  227  OH4JFN EK/RX3DPK -09
013845  -9  227  EK/RX3DPK OH4JFN KP32
013900 -14  227  OH4JFN EK/RX3DPK -09
013915  -7  227  EK/RX3DPK OH4JFN KP32
013930 -16  227  OH4JFN EK/RX3DPK -09
013945 -11  227  EK/RX3DPK OH4JFN KP32
014000 -18  227  OH4JFN EK/RX3DPK -10
014015 -15  227  EK/RX3DPK OH4JFN KP32 (x2)
014100 -20  227  OH4JFN EK/RX3DPK -09
014115  -4  227  EK/RX3DPK OH4JFN KP32
014130 -24  227  OH4JFN EK/RX3DPK -06 (x2)

UTC    dB Audio  Message
135045 -10  585  SQ2ODE OH4JFN KP32
151845  -8  657  OH4JFN GB1HTC -04
151900 -11  656  GB1HTC OH4JFN R-17
151915 -12  657  OH4JFN GB1HTC RR73
151930 -13  656  GB1HTC OH4JFN R-17
213600 -15 2511  DS1JFY OH4JFN KP32
205115  -3 2642  RC0JD OH4JFN KP32 (x3)
205430 -17 2247  D2ACE OH4JFN KP32 (x6)

UTC    dB Audio  Message
181445 -12 2934  OH4JFN YC9GBQ -11
181500  +2 2933  YC9GBQ OH4JFN R-05
181515 -11 2933  OH4JFN YC9GBQ -11
181530  +0 2933  YC9GBQ OH4JFN R-07
181545 -13 2933  OH4JFN YC9GBQ -11
181600  +4 2932  YC9GBQ OH4JFN R-09 (x5)
182015  -6 2882  9A3TGY OH4JFN KP32 (x3)
192430  -9  635  OH4JFN 7X2KF -21 (x2)

UTC    dB Audio  Message
120615  -6 1361  OH4JFN DO3HCS R-07 (x2)
074215 -18 2035  OH4JFN DN9SGE JO42 (x2)
075930  -6  455  OH4JFN R2ZC KO81
091100  -2 2614  OH4JFN ON5CD RR73
100815 -18 1079  OH4JFN DN9SHA -19
105830  -8 2632  OH4JFN SV2AEL -20 (x2)
100000  -5 2113  OH4JFN F5OHS RR73
123845 -21 2099  OH4JFN UR5LY -05 (x4)
083745 -24 1714  OH4JFN A61FJ RR73

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.