YO3OBB — FT8 activity observed at SO8OO

Observed FT8 message patterns

Attributed sample

5,745 messages

Active dates

77 UTC dates

Estimated median S/N

-6 dB

Estimated 10th-90th percentile

-19 to +7 dB

Recurring-pattern threshold

Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 1,180, moderate (-15 to -9 dB) 1,286, strong (≥ -8 dB) 3,279.

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 YO3OBB 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 YO3OBB

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

KN34 · 4,163 decoded messages

SO8OO receiver locator

KN09VW

Locator-centre separation

721 km (approx.)

Last such locator decoded

2026-09-08 07:05 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
065245  -3 1152  MI0TMW YO3OBB 73
070245  -7 1152  CQ YO3OBB KN34 (x6)
070530 -19 1153  YO3OBB PI4TS JO23
070545  +4 1152  PI4TS YO3OBB -11 (x2)
214315  -8 1151  DK1TS YO3OBB R+08
214515 -17 1152  OH6B YO3OBB +03
214800 -18 1151  YO3OBB PE1JLZ JO22 (x3)

UTC    dB Audio  Message
045815  +4 1115  CQ YO3OBB KN34
045830 -13 1117  YO3OBB S57SWR JN76
045845  -4 1115  S57SWR YO3OBB -06
045900 -12 1117  YO3OBB S57SWR R-20
045915  -1 1115  S57SWR YO3OBB RR73
045930  -9 1117  YO3OBB S57SWR 73
050115  -3 1115  CQ YO3OBB KN34 (x9)

UTC    dB Audio  Message
090245 -15 1297  CQ YO3OBB KN34 (x5)
090515 -17 1297  SQ4PKO YO3OBB +03 (x2)
090715  -8 1297  DL1TRK YO3OBB +08 (x2)
090815 -10 1297  CQ YO3OBB KN34 (x4)
091015 -13 1297  SP3WVL YO3OBB +00 (x2)

UTC    dB Audio  Message
192045 -13 1525  CQ YO3OBB KN34 (x2)
213230  +3 2910  YO3OBB IW5ALZ JN53
213245 -16 1525  BA3NZ YO3OBB RR73 (x2)
213330  -8 2005  YO3OBB IW5ALZ JN53
213445 -21 1525  CQ YO3OBB KN34                        a1
213715 -20 1525  BG7BVI YO3OBB 73
214015  -1 1525  CQ YO3OBB KN34 (x3)
042930 -19 1522  YO3OBB ZL2THM RE78
043445 -23 1779  CQ YO3OBB KN34 (x2)
044345 -16 1780  SQ7OBB YO3OBB 73

UTC    dB Audio  Message
204100  +5 1443  YO3OBB UX7QV KN29 (x7)

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.