YU7YZ — FT8 activity observed at SO8OO

Observed FT8 message patterns

Attributed sample

841 messages

Active dates

34 UTC dates

Estimated median S/N

+4 dB

Estimated 10th-90th percentile

-8.2 to +16 dB

Recurring-pattern threshold

Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 24, moderate (-15 to -9 dB) 59, strong (≥ -8 dB) 758.

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 YU7YZ 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 YU7YZ

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

JN95 · 438 decoded messages

SO8OO receiver locator

KN09VW

Locator-centre separation

536 km (approx.)

Last such locator decoded

2026-09-07 18:08 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
180330  -6 1134  YU7YZ RA4HG -09
180330  -4 1850  YU7YZ PD1RGW R-02
180345  +1 2480  PD1RGW YU7YZ RR73
180400  -1 1134  YU7YZ RA4HG -08
180400  -6 1850  YU7YZ PD1RGW 73
180415  +0 2480  RA4HG YU7YZ R-12
180430  -6 1134  YU7YZ RA4HG RR73
180445  -1 2480  RA4HG YU7YZ 73
180515  +1 2480  5Q1X YU7YZ -11 (x2)
180630 -13 1435  YU7YZ 5Q1X R-06
180645  +2 2480  DH3KR YU7YZ -15 (x2)
180745  +2 2480  F6BHK YU7YZ -09
180815  +4 2480  CQ YU7YZ JN95

UTC    dB Audio  Message
174915  +2 2451  HF5A YU7YZ RR73
174930  -4 2234  YU7YZ HF5A 73
174945  +3 2451  CQ YU7YZ JN95
175000  -1 2451  YU7YZ S54J JN76
175015  -3 2451  S54J YU7YZ -09
175030  -3 2451  YU7YZ S54J R+06
175045  +8 2451  S54J YU7YZ RR73
175100  +2 2451  YU7YZ S54J 73
175115 +10 2451  CQ YU7YZ JN95
222215  +0 2423  RA9YTI YU7YZ JN95 (x2)
222300 -23 1604  YU7YZ RA9YTI -21
222315  -5 2423  RA9YTI YU7YZ R-17 (x3)

UTC    dB Audio  Message
181345 +12 2375  ZS1J YU7YZ JN95 (x3)
182000  +6 1001  YU7YZ DB100FT +07
182415  +4 2478  ZS1J YU7YZ JN95 (x11)

UTC    dB Audio  Message
123830  -1 2514  OH0KCE YU7YZ JN95
152600  -4 1564  YU7YZ YC1FBG RR73
152800 -19 1154  YU7YZ F1TXI IN96 (x4)
052415  -6  775  YU7YZ R6FMF -14 (x2)
032930 -13  866  YU7YZ F4NDC JN26
154745  -2  993  YU7YZ SM0NUE JO99
124400 -21 1941  YU7YZ F4FSY -12

UTC    dB Audio  Message
165645  +1 2521  JH6EYL YU7YZ -17 (x2)
165745  -1 2521  BG5CZW YU7YZ -15 (x2)
165845  +5 2521  BA4UFM YU7YZ -14
165915  +4 2521  CQ DX YU7YZ JN95
165945  -1 2521  BD9DM YU7YZ -16
170045  +0 2521  CQ DX YU7YZ JN95
170130 -10 2271  YU7YZ DJ5YS JN68
170530  -2 2521  E24WBO YU7YZ JN95 (x4)
170730  -1 2520  CQ DX YU7YZ JN95 (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.